| Class Number |
Class Name |
No. of Patents |
| 208/39 |
Asphalts, tars, pitches and resins; making, treating and recovery |
258 |
| 208/40 |
By chemical conversion of oil |
111 |
| 208/41 |
By distillation |
49 |
| 208/42 |
Tar feed |
29 |
| 208/43 |
By contact with hot gases |
16 |
| 208/44 |
Chemical modification of asphalt, tar, pitch or resin |
287 |
| 208/45 |
Solvent extraction |
177 |
| 208/DIG.1 |
Automatic control |
213 |
| 208/400 |
By treatment of solid mineral, e.g., coal liquefaction, etc. |
97 |
| 208/403 |
Chemical modification of solids before hydrogenation |
66 |
| 208/401 |
Including a test or measurement |
35 |
| 208/426 |
Including agglomeration, comminution or size-classification of solids |
134 |
| 208/427 |
Including burning of feed or product |
259 |
| 208/415 |
Including contact of feed with liquid produced in the process, i.e., recycle |
130 |
| 208/418 |
Including contact with hydrogen gas |
127 |
| 208/417 |
Recycle of bottoms (resid) |
90 |
| 208/416 |
With discrete hydrogenation of recycle stream |
86 |
| 208/428 |
Including contact with extraneous additive other than hydrogen, e.g., solvent, etc. |
147 |
| 208/434 |
Additive is petroleum or fraction from petroleum refining |
96 |
| 208/435 |
Additive is specified catalyst or liquid solvent or dispersant |
235 |
| 208/430 |
Contact with additive, followed by chemical conversion |
111 |
| 208/429 |
Distinct addition zones |
63 |
| 208/433 |
Simultaneous treatment with gaseous additive and liquid solvent |
77 |
| 208/431 |
Specified hydrogen-donor solvent |
112 |
| 208/432 |
With specified circulation procedure in contact zone |
52 |
| 208/412 |
Plural hydrogenation steps |
92 |
| 208/413 |
Solid catalyst in at least one step |
106 |
| 208/407 |
Specified agitation or circulation in gas contact zone |
78 |
| 208/408 |
Gas includes hydrogen |
113 |
| 208/411 |
Using solid heat carrier |
84 |
| 208/409 |
Vertical gas upflow, e.g., fluidization, etc. |
94 |
| 208/410 |
Using solid heat carrier |
80 |
| 208/424 |
Specified procedure to improve separation of solids from liquid product |
160 |
| 208/425 |
Including centrifugation, filtering, flotation or vibration |
100 |
| 208/402 |
Using electrical, magnetic or wave energy |
45 |
| 208/404 |
Using molten additive, e.g., heat carrier, etc. |
18 |
| 208/405 |
Molten catalyst |
10 |
| 208/406 |
Halide-containing |
18 |
| 208/419 |
Using specifically added catalyst during hydrogenation |
130 |
| 208/421 |
Containing group vi transition metal |
107 |
| 208/422 |
And group viii metal |
145 |
| 208/423 |
Containing group viii metal |
129 |
| 208/420 |
Dissolved or suspended-thermally-decomposable catalyst, component or precursor |
72 |
| 208/414 |
With hydrogen production from water |
103 |
| 208/46 |
Chemical conversion of hydrocarbons |
259 |
| 208/106 |
Cracking |
289 |
| 208/113 |
Catalytic |
954 |
| 208/115 |
Halogen containing catalyst |
33 |
| 208/116 |
Metal halide |
21 |
| 208/117 |
Group iii metal halide |
26 |
| 208/121 |
Metal or metal oxide containing catalyst |
195 |
| 208/122 |
Group iii metal or oxide |
82 |
| 208/123 |
With group vi metal or oxide |
41 |
| 208/124 |
With group viii metal or oxide |
76 |
| 208/114 |
Phosphorus, boron or nitrogen containing catalyst |
178 |
| 208/118 |
Silica or silicate containing catalyst |
152 |
| 208/119 |
With metal or metal oxide |
93 |
| 208/120.01 |
With group iii metal, rare earth metal, or metal oxide (i.e., sc, y, al, ga, in, tl, metal of atomic number 57-71 or oxide thereof) |
504 |
| 208/120.15 |
With group i metal or metal oxide (i.e., alkali metal, ag, au, cu, or oxide thereof) |
281 |
| 208/120.25 |
With group ii metal or metal oxide (i.e., alkaline earth metal, be, mg, zn, cd, hg, or oxide thereof) |
203 |
| 208/120.1 |
With group iv metal or metal oxide (i.e., ti, zr, hf, ge, sn, pb, or oxide thereof) |
200 |
| 208/120.2 |
With group v metal or metal oxide (i.e., v, nb, ta, as, sb, bi, or oxide thereof) |
133 |
| 208/120.3 |
With group vi metal or metal oxide (i.e., cr, mo, w, po, or oxide thereof) |
87 |
| 208/120.05 |
With group vii metal or metal oxide (i.e., mn, tc, re, or oxide thereof) |
90 |
| 208/120.35 |
With group viii metal or metal oxide (i.e., iron or platinum group metal, or oxide thereof) |
243 |
| 208/107 |
Hydrogenative |
177 |
| 208/108 |
Catalytic |
523 |
| 208/112 |
Metal or metal oxide catalyst |
421 |
| 208/109 |
Silica or silicate containing catalyst |
108 |
| 208/110 |
With metal or metal oxide |
135 |
| 208/111.01 |
With group iii metal, rare earth metal, or metal oxide (i.e., sc, y, al, ga, ln, tl, metal of atomic number 57-71, or oxide thereof) |
217 |
| 208/111.15 |
With group i metal or metal oxide (i.e., alkali metal, ag, au, cu, or oxide thereof) |
302 |
| 208/111.25 |
With group ii metal or metal oxide (i.e., alkaline earth metal, be, mg, zn, cd, hg, or oxide thereof) |
148 |
| 208/111.1 |
With group iv metal or metal oxide (i.e., ti, zr, hf, ge, sn, pb, or oxide thereof) |
155 |
| 208/111.2 |
With group v metal or metal oxide (i.e., v, nb, ta, as, sb, bi, or oxide thereof) |
60 |
| 208/111.3 |
With group vi metal or metal oxide (i.e., cr, mo, w, po, or oxide thereof) |
404 |
| 208/111.05 |
With group vii metal or metal oxide (i.e., mn, tc, re, or oxide thereof) |
57 |
| 208/111.35 |
With group viii metal or metal oxide (i.e., iron, or platinum group metal, or oxide thereof) |
639 |
| 208/131 |
Soaking |
268 |
| 208/132 |
With heating in tubular confined stream |
130 |
| 208/125 |
With nonreactive material |
78 |
| 208/126 |
Solids |
75 |
| 208/127 |
Suspension system |
208 |
| 208/128 |
Vapors |
30 |
| 208/129 |
Combustion gases |
29 |
| 208/130 |
Steam |
183 |
| 208/142 |
Hydrogenation (saturation) |
79 |
| 208/143 |
Catalytic |
424 |
| 208/144 |
Feed of specific composition |
153 |
| 208/145 |
With added source of hydrogen (includes hydrogen donor) |
71 |
| 208/78 |
Plural parallel stages of chemical conversion |
165 |
| 208/79 |
At least one stage is reforming |
81 |
| 208/80 |
Split feed |
137 |
| 208/49 |
Plural serial stages of chemical conversion |
136 |
| 208/50 |
Coking in at least one stage |
162 |
| 208/53 |
First stage is coking |
29 |
| 208/54 |
Second stage is cracking |
16 |
| 208/55 |
Catalytic cracking |
19 |
| 208/52R |
With both catalytic and thermal cracking |
13 |
| 208/52CT |
Catalyst treatment to remove metal contaminants |
200 |
| 208/51 |
With reforming |
11 |
| 208/57 |
First stage is an hydrogenation (saturation) |
178 |
| 208/58 |
First stage is hydrocracking (includes hydro-desulfurization under cracking conditions) |
338 |
| 208/59 |
Hydrocracking in all stages |
304 |
| 208/60 |
With subsequent reforming |
77 |
| 208/61 |
With subsequent thermal or catalytic cracking |
111 |
| 208/62 |
First stage is reforming |
71 |
| 208/66 |
Catalytic |
77 |
| 208/63 |
Reforming in all stages |
54 |
| 208/64 |
Catalyst in at least one stage |
118 |
| 208/65 |
Noble metal containing catalyst |
157 |
| 208/67 |
First stage is thermal or catalytic cracking |
125 |
| 208/72 |
Cracking in all stages |
86 |
| 208/73 |
Catalyst in at least one stage |
43 |
| 208/74 |
Catalyst in multiple stages |
105 |
| 208/76 |
With cracking of the first stage bottoms |
32 |
| 208/77 |
With cracking of the first stage intermediate fraction |
42 |
| 208/75 |
With cracking of total product from first stage |
57 |
| 208/68 |
With subsequent hydrocracking |
58 |
| 208/71 |
With subsequent polymerization |
40 |
| 208/69 |
With subsequent reforming |
18 |
| 208/70 |
Catalytic reforming |
50 |
| 208/56 |
Hydrogen donor diluent cyclic processes |
68 |
| 208/133 |
Reforming (includes dehydrogenation, isomerization, cyclization, aromatization, alkylation, dealkylation reactions) |
107 |
| 208/134 |
Catalytic |
359 |
| 208/141 |
Feed of specific composition |
79 |
| 208/135 |
With group iii metal or metal oxide containing catalyst |
319 |
| 208/136 |
With group vi metal or metal oxide |
110 |
| 208/137 |
With group viii metal or metal oxide |
214 |
| 208/138 |
Noble metal or oxide thereof |
441 |
| 208/139 |
With halogen containing additive |
397 |
| 208/140 |
With recovery or reactivation of catalyst |
163 |
| 208/146 |
Solids contacting and mixing |
113 |
| 208/148 |
Combined gravitating bed and suspension zones |
23 |
| 208/165 |
Gravitating compact beds |
43 |
| 208/166 |
Liquid feeding |
24 |
| 208/167 |
Solids curtain type |
10 |
| 208/169 |
Plural zones of similar function (same chamber) |
28 |
| 208/172 |
Preheating or quenching with solids |
5 |
| 208/170 |
Size stratification prevention |
1 |
| 208/173 |
Solids transferring |
31 |
| 208/174 |
By pneumatic lifting |
18 |
| 208/175 |
Compact type |
7 |
| 208/168 |
Solids-vapor disengagement |
18 |
| 208/171 |
Uniform solids withdrawal |
19 |
| 208/150 |
Purging |
59 |
| 208/151 |
Plural stages |
42 |
| 208/147 |
Separate contiguous, dissimilar function, contacting zones |
16 |
| 208/176 |
Solids moving processes |
37 |
| 208/149 |
Solids of dissimilar composition |
74 |
| 208/152 |
Solids replenishment, or selective discard |
102 |
| 208/153 |
Suspension system |
219 |
| 208/163 |
Fluidized dense bed |
60 |
| 208/164 |
Solids transferring |
385 |
| 208/157 |
Liquid feed |
149 |
| 208/155 |
Plural zones of similar function |
73 |
| 208/156 |
Solids and contacting fluids are both in series |
27 |
| 208/161 |
Separation of entrained fines from effluents |
172 |
| 208/162 |
In presence of a liquid |
30 |
| 208/154 |
Start-up and shut down procedures |
21 |
| 208/158 |
With augmented turbulence (in addition to normal mixing in bed) |
41 |
| 208/159 |
With temperature regulation |
78 |
| 208/160 |
By solids circulation to external heat exchange and return to same zone |
52 |
| 208/81 |
With contacting vapor porducts with liquid feed (i.e., product scrubbing and feed stripping) |
22 |
| 208/82 |
Only selected fractions of product or feed are contacted |
15 |
| 208/84 |
With added material (to scrubbing-stripping stage) |
10 |
| 208/83 |
With subsequent fractionation |
15 |
| 208/85 |
With preliminary treatment of feed |
72 |
| 208/86 |
Deasphalting |
115 |
| 208/92 |
Distillation |
119 |
| 208/94 |
Plural stages of distillation |
28 |
| 208/93 |
With blending of products of distillation with each other or with converted products |
82 |
| 208/88 |
Refining |
87 |
| 208/90 |
With acids |
9 |
| 208/89 |
With hydrogen |
476 |
| 208/91 |
With solid absorbents |
96 |
| 208/87 |
Solvent extraction |
126 |
| 208/47 |
With prevention of corrosion or erosion in system |
171 |
| 208/48R |
With prevention or removal of deleterious carbon accumulations or equipment |
309 |
| 208/48AA |
Antifoulant additive |
343 |
| 208/48Q |
Quench |
109 |
| 208/95 |
With subsequent treatment of products |
109 |
| 208/97 |
Refining |
210 |
| 208/98 |
With acids |
7 |
| 208/99 |
With solid adsorbents |
50 |
| 208/100 |
Separation of vapors and liquid products |
138 |
| 208/101 |
With absorption with liquid |
43 |
| 208/102 |
With additional separation of liquid products from primary separation zone |
91 |
| 208/103 |
With additional separation of vapor products |
70 |
| 208/105 |
With condensation of second stage vapors |
26 |
| 208/104 |
With distillation of second stage liquid |
32 |
| 208/96 |
Solvent extraction |
118 |
| 208/12 |
Colorng treatments (includes fluorescence) |
31 |
| 208/308 |
Fractionation |
78 |
| 208/310R |
Adsorption |
79 |
| 208/310Z |
Zeolite adsorbent |
167 |
| 208/309 |
Deasphalting |
196 |
| 208/347 |
Distillation |
81 |
| 208/368 |
Condensatin by direct heat exchange |
12 |
| 208/360 |
Filming |
5 |
| 208/361 |
Flash vaporization |
27 |
| 208/364 |
Plural stages of vaporization |
27 |
| 208/365 |
With heat recovery by indirect heat exchange |
30 |
| 208/350 |
Rectification |
33 |
| 208/351 |
C1-c4 alkane removal |
47 |
| 208/352 |
Flash vaporizaton |
18 |
| 208/354 |
Plural or combined with additional distillation |
47 |
| 208/355 |
With product recycle between distillation zones |
53 |
| 208/357 |
Vacuum or pressure |
31 |
| 208/356 |
With added gas or vapor (e.g., steam) |
51 |
| 208/353 |
With heat recovery by indirect heat exchange |
36 |
| 208/358 |
With liquid product recycle to rectification zone |
35 |
| 208/359 |
Spraying |
6 |
| 208/366 |
Vacuum or pressure |
34 |
| 208/369 |
Volatile treatment other than condensation |
10 |
| 208/362 |
With added gas or vapor |
25 |
| 208/363 |
Steam |
23 |
| 208/367 |
With agitation of distilland |
4 |
| 208/348 |
With nonvapor compound added prior to or during vaporization |
81 |
| 208/349 |
With nonvaporization treatment of liquid condensate or residue |
22 |
| 208/311 |
Liquid extraction with solvents |
83 |
| 208/317 |
Counter current multistage extraction |
21 |
| 208/313 |
Extractive distillation |
60 |
| 208/338 |
Liquid sulfur dioxide |
4 |
| 208/339 |
Liquid-liquid contacting |
19 |
| 208/322 |
Organic solvent containing |
46 |
| 208/336 |
Halogen containing |
3 |
| 208/325 |
Heterocyclic |
15 |
| 208/327 |
Furfural and derivatives |
21 |
| 208/326 |
Hetero-n-containing |
46 |
| 208/337 |
Hydrocarbon |
27 |
| 208/330 |
Nitrogen-containing solvent |
22 |
| 208/331 |
Amino compound |
5 |
| 208/328 |
Nonoxo carbonylic |
1 |
| 208/329 |
Carboxylic esters |
5 |
| 208/332 |
Oxo compound containing |
13 |
| 208/333 |
Oxy compound |
23 |
| 208/335 |
Aromatic |
13 |
| 208/334 |
Ethers |
17 |
| 208/323 |
With added solvent or solvent modifier |
44 |
| 208/324 |
Inorganic |
10 |
| 208/314 |
Plural stages with different oil miscible solvents |
28 |
| 208/316 |
Difference is mere change in proportions of solvents |
5 |
| 208/315 |
With recycle of product of later extraction to earlier extraction stage |
12 |
| 208/312 |
With blending of separated fractions with each other or with feed |
16 |
| 208/319 |
With pressure variation |
7 |
| 208/318 |
With recycle of oil |
7 |
| 208/321 |
With solvent rehabilitation |
97 |
| 208/320 |
With temperature gradient in extraction zone or between extraction zones |
17 |
| 208/340 |
Recovery of mineral oil from natural or converted gases |
34 |
| 208/341 |
By absorption and vaporization |
40 |
| 208/346 |
Absorption stage is under pressure |
2 |
| 208/343 |
Indirect heat exchange between lean and rich absorbent |
9 |
| 208/344 |
Plural absorption stages |
4 |
| 208/345 |
At least one stage is under pressure |
1 |
| 208/342 |
With fractional condensation prior to absorption |
11 |
| 208/370 |
Miscellaneous |
70 |
| 208/DIG.2 |
Molecular sieve |
31 |
| 208/3 |
Oxidation of mineral oils |
44 |
| 208/4 |
To form asphalts, tars or pitches |
27 |
| 208/5 |
In presence of soild contact material |
14 |
| 208/6 |
Tar, pitch, or asphalt feed |
34 |
| 208/7 |
With cracking |
6 |
| 208/24 |
Paraffin wax; treatment or recovery |
47 |
| 208/27 |
Chemical treatment (refining or modification except mere solvent extraction) |
199 |
| 208/28 |
Separation of paraffin from oil (e.g., dewaxing) |
83 |
| 208/37 |
Chilling |
39 |
| 208/38 |
With filtering |
36 |
| 208/29 |
Emulsion dewaxing |
6 |
| 208/30 |
Separation of residual oil from wax (i.e., deoiling) |
16 |
| 208/32 |
Sweating |
7 |
| 208/31 |
With solvent |
29 |
| 208/33 |
Solvent dewaxing |
125 |
| 208/35 |
With chilling by evaporation of solvent |
23 |
| 208/34 |
With deasphalting treatment |
7 |
| 208/36 |
With nondewaxing solvent extraction of oil |
12 |
| 208/26 |
With sorption agents |
5 |
| 208/25 |
With ureas |
11 |
| 208/2 |
Phenolic or toxic oils |
8 |
| 208/950 |
Processing of "fischer-tropsch" crude |
134 |
| 208/14 |
Products and compositions |
168 |
| 208/22 |
Asphalts, tars, pitches and resins |
227 |
| 208/23 |
Admixtures |
63 |
| 208/15 |
Fuels |
166 |
| 208/16 |
Gasolines |
71 |
| 208/17 |
Admixtures |
72 |
| 208/18 |
Lubricating oils |
278 |
| 208/19 |
Admixtures |
114 |
| 208/20 |
Waxes |
26 |
| 208/21 |
Admixtures |
19 |
| 208/177 |
Refining |
141 |
| 208/255 |
Gum or gum former removal |
67 |
| 208/256 |
With acid |
9 |
| 208/257 |
With metal or metal compound |
9 |
| 208/258 |
Alkali metal |
3 |
| 208/259 |
Alkali or alkali earth metal compound (except clays) |
8 |
| 208/260 |
Clay type or alumina |
15 |
| 208/261 |
Vapor phase treatment |
1 |
| 208/262.1 |
Halogen contaminant removal |
145 |
| 208/262.5 |
Polychorinated biphenyl (pcb) |
147 |
| 208/251R |
Metal contaminant removal |
373 |
| 208/251H |
Employing hydrogen |
493 |
| 208/252 |
With acid |
66 |
| 208/253 |
With metal or metal compound |
148 |
| 208/254R |
Nitrogen contaminant removal |
165 |
| 208/254H |
Employing hydrogen |
505 |
| 208/263 |
Organic acid or phenol contaminant removal |
99 |
| 208/179 |
Purifying used oil |
142 |
| 208/184 |
Distillation or degassing |
95 |
| 208/185 |
With gaseous treating agent |
26 |
| 208/186 |
With solid-liquid separation |
30 |
| 208/181 |
Plural treating agents (sequential or simultaneous) |
68 |
| 208/182 |
One is a solid contact material |
45 |
| 208/183 |
With acid or alkali |
35 |
| 208/180 |
With added organic material |
89 |
| 208/208R |
Sulfur removal (free or combined sulfur) |
277 |
| 208/250 |
Solids contacting and mixing |
24 |
| 208/218 |
Split treatment |
49 |
| 208/208M |
Using free alkali metal |
13 |
| 208/219 |
With acids |
33 |
| 208/223 |
Inorganic acid |
23 |
| 208/225 |
Hydrochloric acid |
5 |
| 208/224 |
Sulfuric acid |
16 |
| 208/220 |
Plural stages of sulfur removal |
14 |
| 208/221 |
With preliminary treatment of feed |
17 |
| 208/222 |
With subsequent treatment of product |
26 |
| 208/226 |
With alkali or alkali earth metal compound (except clays) |
72 |
| 208/230 |
Alkali metal compound |
75 |
| 208/231 |
With added oxygen containing organic compound |
8 |
| 208/232 |
Alcohol containing |
15 |
| 208/233 |
With other organic compound |
4 |
| 208/234 |
With regeneration of treating agent |
7 |
| 208/235 |
With regeneration of treating agent |
45 |
| 208/227 |
Plural stages of sulfur removal |
20 |
| 208/228 |
With preliminary treatment of feed |
17 |
| 208/229 |
With subsequent treatment of product |
22 |
| 208/241 |
With free halogen or nonmetal halide containing reagent |
5 |
| 208/246 |
With group ib metal or compound |
46 |
| 208/247 |
With group iib metal or compound |
66 |
| 208/248 |
With group iii metal or compound |
40 |
| 208/249 |
With group iv, v, vii metal or compound |
56 |
| 208/243 |
With group vi metal or compound |
59 |
| 208/244 |
With group viii metal or compound |
115 |
| 208/209 |
With hydrogen |
172 |
| 208/210 |
Plural stage treatments with hydrogen |
269 |
| 208/211 |
With preliminary treatment of feed |
208 |
| 208/213 |
With solid catalyst or absorbent |
431 |
| 208/216R |
With group vi metal or compound |
558 |
| 208/216PP |
With specific porosity or pore volume |
274 |
| 208/217 |
With group viii metal or compound |
355 |
| 208/215 |
With heavy metal sulfide |
90 |
| 208/214 |
With hydrogen yielding material (h donor) |
23 |
| 208/212 |
With subsequent treatment of product |
213 |
| 208/236 |
With nitrogen containing treating reagent |
90 |
| 208/237 |
With organic reagent |
73 |
| 208/239 |
Heavy metal soap containing |
2 |
| 208/238 |
Hydrocarbon containing |
37 |
| 208/240 |
Oxygen containing |
61 |
| 208/245 |
With silicon or compound thereof |
36 |
| 208/242 |
With sulfur oxides |
10 |
| 208/189 |
Sweetening |
82 |
| 208/207 |
Nitrogen containing compound |
98 |
| 208/203 |
With alkali metal hydroxide or carbonate |
49 |
| 208/206 |
With added nitrogen containing compound |
80 |
| 208/204 |
With added oxygen containing organic compound |
16 |
| 208/205 |
Acyclic alcohol |
6 |
| 208/191 |
With copper compounds |
15 |
| 208/195 |
Copper chloride and free oxygen containing gas |
1 |
| 208/192 |
With preliminary treatment of oil |
7 |
| 208/193 |
With subsequent treatment of the sweet oil |
2 |
| 208/194 |
Separation or recovery of copper compound |
0 |
| 208/190 |
With hypochlorites |
4 |
| 208/197 |
With lead compounds |
1 |
| 208/198 |
Lead sulfide |
0 |
| 208/199 |
Sodium plumbite |
1 |
| 208/200 |
With preliminary treatment of the oil |
1 |
| 208/201 |
With subsequent treatment of the sweet oil |
1 |
| 208/202 |
Organic treating agent |
3 |
| 208/196 |
With peroxides |
24 |
| 208/187 |
Water removal (dehydration) |
118 |
| 208/188 |
With treating agent |
181 |
| 208/265 |
With acids |
23 |
| 208/280 |
Halogen containing acid |
8 |
| 208/281 |
Hydrochloric acid |
12 |
| 208/282 |
Organic acid |
27 |
| 208/279 |
Phosphorus containing acid |
7 |
| 208/266 |
Sulfuric acid |
15 |
| 208/270 |
Plural stages of acid treatment |
2 |
| 208/269 |
Split treatment |
1 |
| 208/268 |
White oil making |
6 |
| 208/267 |
With fluid rotation or agitation |
1 |
| 208/276 |
With nonwater additive |
0 |
| 208/277 |
Organic compound |
0 |
| 208/278 |
Solid contact material |
0 |
| 208/271 |
With preliminary treatment of the oil |
5 |
| 208/272 |
Fractionation |
0 |
| 208/273 |
With subsequent treatment of the oil |
7 |
| 208/274 |
Organic treating agent |
1 |
| 208/275 |
Solid absorbent |
2 |
| 208/283 |
With alkali or alkali earth metal compound (except clays) |
28 |
| 208/284 |
Alkali metal compound |
32 |
| 208/288 |
With added material |
10 |
| 208/285 |
With preliminary treatment of the oil |
4 |
| 208/287 |
With solid carrier |
5 |
| 208/286 |
With subsequent treatment of the oil |
11 |
| 208/292 |
With boron, phosphorus, arsenic, antimony or bismuth containing treating agent |
8 |
| 208/294 |
With free metal |
8 |
| 208/296 |
With group ib or iib metal compound |
20 |
| 208/297 |
With group iii metal compound (except clays) |
18 |
| 208/295 |
With group iv, v, vi, vii or viii metal compound |
48 |
| 208/264 |
With hydrogen |
118 |
| 208/298 |
With liquid treating agent (includes slurries of solids) |
8 |
| 208/289 |
With nitrogen containing compound |
54 |
| 208/290 |
With organic compound |
30 |
| 208/291 |
Oxygen containing |
43 |
| 208/178 |
With reagent feed control |
6 |
| 208/299 |
With solid catalyst or absorbent |
155 |
| 208/306 |
Composite or plural treating agents |
12 |
| 208/300 |
Of particular physical shape or structure |
21 |
| 208/303 |
Plural treating stages |
30 |
| 208/304 |
Processes including downward movement of particles |
8 |
| 208/307 |
Silicon or carbon containing treating agent |
59 |
| 208/305 |
Solids rehabilitation |
57 |
| 208/301 |
With preliminary treatment of the oil |
44 |
| 208/302 |
With subsequent treatment of the oil |
37 |
| 208/293 |
With sulfur containing treating agent |
22 |
| 208/952 |
Solid feed treatment under supercritical conditions |
56 |
| 208/951 |
Solid feed treatment with a gas other than air, hydrogen or steam |
93 |
| 208/1 |
Synthetic drying oils |
0 |
| 208/390 |
Tar sand treatment with liquid |
203 |
| 208/391 |
Inorganic (only) liquid |
161 |
| 208/13 |
Treatment of refining sludge |
113 |
