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Class Information
Number: 95
Name: Gas separation: processes >
Description: This class provides for processes involving steps resulting in separation of a gas from a fluid mixture comprising (i) a gas and solid or liquid particles entrained therein, (ii) a liquid and gas entrained therein, or (iii) a plurality of gases. As a general rule for this class, there must be a relationship of process steps embracing: (a) inflow of the fluid mixture to be treated, (b) a step or steps effective to cause the separation into constituent parts, and (c) an outflow of at least one constituent which is separate and distinct from the outflow of another constituent, including outflow of a constituent by removing the separating medium itself. The gas separation for this class is effected by processes other than chemical reaction.

Class Number	Class Name	No. of Patents
95/82	Chromatography	154
95/85	Including use of gas flow distributor in column	5
95/89	Injection, per se, without separation	60
95/84	Liquid supported on particulate packing	14
95/83	Liquid supported on surface of capillary column	12
95/86	Plural separate columns	50
95/88	Specific column packing or sorbent material (e.g., particle size, composition, etc.)	73
95/87	With heating or cooling	139
95/39	Compressing and indirect cooling of gaseous fluid mixture to separate	80
95/42	And liquid contact (e.g., scrubbing, sorption, etc.)	46
95/41	And solid sorption	47
95/40	And use of heat absorbing agent	2
95/267	Deflecting	76
95/268	And filtering	133
95/269	Centrifugal force	90
95/270	Created by rotating equipment	67
95/271	Tangential gas inflow (e.g., cyclone, etc.)	169
95/272	Tortuous flow path	44
95/241	Degasification of liquid	80
95/254	And subsequent handling of evolved gas, stripping gas, or residue liquid	61
95/255	Evolved gas removed by sweep gas	18
95/256	For indirect heat exchange	13
95/257	Gas condensed	22
95/258	Gas recycled or further separated	57
95/259	Liquid further separated	25
95/260	By liquid flow modifying or mechanical agitating	98
95/261	Centrifugal force	168
95/262	Impinging on baffle	55
95/266	By reduction of pressure (e.g., flashing, etc.)	169
95/263	By stripping with gas	116
95/265	Nitrogen is stripping gas	41
95/264	Steam is stripping gas	41
95/242	Defoaming	66
95/253	Emulsion breaking or multiple liquid separating	61
95/243	Plural successive degassing treatments	29
95/244	Boiler feed water degassing	12
95/251	By heating	6
95/252	And liquid flow modifying or mechanical agitating	7
95/247	By reduction of pressure (e.g., flashing, etc.)	30
95/250	And heating	8
95/248	And liquid flow modifying or mechanical agitating	47
95/249	And heating	7
95/245	By stripping with gas	38
95/246	And reduction of pressure (e.g., flashing, etc.)	29
95/31	Difference in molecular velocity, density, or momentum of gases used	25
95/34	Centrifugal force	28
95/35	Created by rotating equipment	22
95/32	Passing gases through nozzle	36
95/33	Directing gas streams toward one another	5
95/57	Electric or electrostatic field (e.g., electrostatic precipitation, etc.)	73
95/63	And nonelectrical separation of fluid mixture	35
95/67	By heating or cooling	18
95/70	Distinct separation step follows electric or electrostatic treatment	62
95/69	Distinct separation step precedes electric or electrostatic treatment	63
95/68	Including cleaning or regeneration of separating means (e.g., particulate bed filter, deflector, etc.)	27
95/64	Liquid addition to gaseous fluid mixture	39
95/65	Liquid addition precedes electrical precipitation	47
95/66	With heating or cooling	29
95/77	Continuously moving electrode	9
95/78	Including baffling, deflection, or restriction of gas flow	127
95/79	Plural separate stages or zones (e.g., separate ionization and collection regions, etc.)	34
95/80	Pulsing or time-varying electric field (e.g., ac, pulsed dc, etc.)	8
95/81	Pulsing or time-varying electric field (e.g., ac, pulsed dc, etc.)	39
95/71	With addition of liquid to gaseous fluid mixture	94
95/72	Vaporization of liquid	15
95/58	With addition of solid, gas, or vapor	80
95/62	Agglomerating gas-borne particles	18
95/59	Electrode treating (e.g., coating, cleaning, etc.)	50
95/60	Heating or cooling	42
95/61	Solid is electrically conducting	19
95/74	With cleaning of collector electrode	46
95/75	By liquid flushing	31
95/76	By scraping or vibrating	45
95/73	With heating or cooling	52
95/273	Filtering	389
95/284	And reduction of pressure	36
95/285	Coated or chemically treated filter	105
95/277	Moving filter	48
95/286	Plural separate media	105
95/287	In series	161
95/274	Through particulate solids	46
95/275	Moving bed	54
95/276	With cleaning of filter bed	40
95/278	With cleaning of filter	150
95/282	By mechanical manipulation	55
95/279	By use of gas	112
95/280	Pulsed gas flow	153
95/281	By use of liquid	44
95/283	With heating of filter	53
95/288	Heat exchanging	139
95/289	Cold wall-hot wall thermal diffusion	11
95/290	Condensing to solid	69
95/149	Liquid contacting (e.g., sorption, scrubbing, etc.)	80
95/216	And deflection	67
95/221	Deflection in plural serial stages	31
95/222	Using diverse type deflectors	10
95/218	Including movement of deflector	47
95/219	Including rotation of liquid, gaseous fluid mixture, or gas-liquid mixture through 360 degrees in stationary apparatus	74
95/220	With heating or cooling	27
95/217	Liquid is in form of curtain	16
95/156	And degasification of a liquid	17
95/178	By heating	16
95/183	Carbon dioxide removed	33
95/182	Halogen compound removed	11
95/179	Liquid recycled or reused	45
95/180	Liquid cooling step before being recycled	37
95/184	Organic compound removed	29
95/181	Sulfur compound removed	50
95/185	By liquid flow modifying or mechanical agitating	10
95/172	By reduction of pressure (e.g., flashing, etc.)	28
95/173	And heating	20
95/174	Liquid recycled or reused	65
95/177	Liquid recycled or reused	51
95/176	Removed gas recycled	27
95/175	Vacuum applied	20
95/159	By stripping with gas	21
95/170	Air is stripping gas	10
95/165	And heating	9
95/166	Liquid recycled or reused	53
95/168	Steam is stripping gas	14
95/167	Vaporized component of contact liquid is stripping gas	8
95/160	And reduction of pressure (e.g., flashing, etc.)	8
95/161	And heating	34
95/162	Steam is stripping gas	16
95/164	Feed gas or constituent thereof is stripping gas	10
95/163	Liquid recycled or reused	36
95/171	Inert stripping gas	12
95/169	Liquid recycled or reused	49
95/157	Defoaming	12
95/158	Degasification step occurs first, with removed gas subsequently contacted by liquid	30
95/186	Liquid recycled or reused	34
95/214	And filtration of gas	101
95/215	Including movement of filter	13
95/204	And recycle of gas for further contact	26
95/187	And recycle or reuse of contact liquid for further contact	89
95/188	After separation of liquid from contact liquid	49
95/189	And separation of solid from contact liquid	42
95/193	By heating (e.g., fractional distillation, etc.)	60
95/194	Indirect heat exchange	35
95/190	By liquid-liquid extraction or formation of azeotrope	22
95/192	By reduction of pressure (e.g., flashing, etc.)	34
95/191	By stripping with gas	33
95/195	After separation of solid from contact liquid	68
95/196	By filtration	25
95/197	By gravity separation	33
95/198	And deflection to remove liquid particles from gas	24
95/199	Liquid contact in plural serial stages	66
95/201	Reduction of pressure during liquid contact	9
95/200	Removal of solid or liquid particles from gas	29
95/203	Reduction of pressure	9
95/202	Removal of solid or liquid particles from gas	27
95/206	And separation of liquid from contact liquid	27
95/209	By heating (e.g., fractional distillation, etc.)	36
95/208	By reduction of pressure (e.g., flashing, etc.)	16
95/207	By stripping with gas	14
95/205	And separation of solid from contact liquid	52
95/152	Coagulating or flocculating agent	32
95/155	Defoaming or antifoaming agent	29
95/226	Gaseous fluid mixture discharged against or beneath surface of liquid body	106
95/153	Hydrate inhibitor	49
95/223	In plural serial stages	56
95/224	Liquid sprays	84
95/225	With heating or cooling	46
95/150	Including foaming of liquid to aid in the separation	24
95/230	Inorganic gas, liquid particle, or solid particle sorbed (e.g., vapor, mist, dust, etc.)	87
95/236	Carbon dioxide sorbed	200
95/233	Halogen or halogen containing compound sorbed	96
95/234	Metal or metal containing compound sorbed	46
95/232	Nitrogen or nitrogen containing compound sorbed	97
95/235	Sulfur or sulfur containing compound sorbed	357
95/231	Water sorbed	114
95/151	Mechanical agitation of liquid body to contact gaseous fluid mixture	18
95/210	On surface extending mass	40
95/213	Apertured partition member	36
95/211	Particulate media, fibrous media, or packing elements	112
95/212	And cleaning of particulate media, fibrous media, or packing elements	18
95/237	Organic gas, liquid particle, or solid particle sorbed (e.g., vapor, mist, dust, etc.)	187
95/240	Alkene sorbed	26
95/238	Alkyne sorbed (e.g., acetylene, etc.)	15
95/239	Cyclic compound sorbed	29
95/154	Surfactant or wetting agent	44
95/228	With cooling	72
95/229	Cooling before liquid contacting	48
95/227	With heating	47
95/36	Liquid-solid slurry used	29
95/38	Halogen containing compound removed from gas	3
95/37	Organic compound removed from gas	5
95/28	Magnetic separation	67
95/27	Magnetized particle bed	22
95/291	Miscellaneous	18
95/43	Selective diffusion of gases	22
95/44	Selective diffusion of gases through immobilized liquid	46
95/45	Selective diffusion of gases through substantially solid barrier (e.g., semipermeable membrane, etc.)	418
95/51	Carbon dioxide or carbon monoxide permeates barrier	276
95/46	Degasification of liquid	160
95/48	Halogen containing compound permeates barrier	39
95/53	Helium permeates barrier	93
95/55	Hydrogen permeates barrier	232
95/56	Elemental metal or alloy barrier	158
95/47	Nitrogen or nitrogen containing compound permeates barrier	155
95/50	Organic compound permeates barrier	186
95/54	Oxygen permeates barrier	470
95/49	Sulfur containing compound permeates barrier	78
95/52	Water vapor permeates barrier	228
95/900	Solid sorbent	91
95/901	Activated carbon	72
95/902	Molecular sieve	221
95/903	Carbon	36
95/90	Solid sorption	167
95/92	And liquid contact (e.g., scrubbing, sorption, etc.)	88
95/94	And recycle or reuse of contact liquid for further contact	18
95/93	Sweep gas used on solid sorbent	22
95/148	And regeneration	186
95/95	Including reduction of pressure	67
95/96	Plural pressure varying steps (e.g., pressure swing adsorption, etc.)	385
95/103	Stepped pressure reduction	131
95/97	Sweep gas used	67
95/98	Feed gas or constituent thereof is sweep gas	186
95/100	Stepped pressure reduction	104
95/101	Vacuum applied	154
95/102	Vacuum applied	118
95/99	With heating or cooling	76
95/104	Sweep gas used	53
95/105	Feed gas or constituent thereof is sweep gas	188
95/106	With heating or cooling	122
95/116	Inorganic gas or liquid particle sorbed (e.g., vapor, mist, etc.)	157
95/139	Carbon dioxide sorbed	411
95/140	Carbon monoxide sorbed	151
95/131	Halogen or halogen containing compound sorbed	94
95/132	Chlorine or chlorine containing compound sorbed	71
95/133	Metal or metal containing compound sorbed	72
95/134	Mercury sorbed	98
95/128	Nitrogen containing compound sorbed	85
95/129	Nitrogen oxide sorbed	98
95/130	Nitrogen sorbed	474
95/127	Noble gas sorbed	73
95/138	Oxygen or ozone sorbed	258
95/135	Sulfur containing compound sorbed	64
95/136	Hydrogen sulfide sorbed	118
95/137	Sulfur dioxide or sulfur trioxide sorbed	117
95/117	Water sorbed	226
95/121	And regeneration of solid sorbent	67
95/126	By heating	87
95/122	Sweep gas used	115
95/123	Hot sweep gas	99
95/125	And cooling of solid sorbent	36
95/124	And cooling of sweep gas	23
95/118	Plural separating treatments of gas by solid sorbent to remove water	33
95/119	And regeneration of any solid sorbent	41
95/120	Heating or cooling	62
95/107	Moving sorbent	57
95/108	Fluidized bed	38
95/109	Having gravity flow of sorbent from zone to zone	25
95/110	Gravity flow of sorbent from zone to zone	28
95/111	Sweep gas used	12
95/112	Steam is sweep gas	6
95/113	Rotating housing containing fixed sorbent or rotating plurality of housings	98
95/141	Organic gas or liquid particle sorbed (e.g., vapor, mist, etc.)	205
95/142	Halogen containing compound sorbed (e.g., phosgene, etc.)	121
95/143	Hydrocarbon sorbed	414
95/144	Alkene sorbed	86
95/145	Alkyne sorbed (e.g., acetylene, etc.)	12
95/147	Benzene ring containing compound sorbed	59
95/146	Gasoline sorbed	58
95/91	Soluble or deliquescent material used	23
95/114	With plural indirect heat transfer steps on solid sorbent or gaseous fluid mixture or constituent thereof	61
95/115	Heating and cooling	132
95/29	Sound waves used	45
95/30	Degasification of liquid	54
95/1	With control responsive to sensed condition	76
95/8	Concentration sensed	123
95/11	Flow of fluid mixture to sorber stopped or diverted to other equipment, or sorbent regenerated	66
95/12	Gas flow rate modified	80
95/10	Humidity sensed	46
95/9	Ph sensed	19
95/13	Sorbent flow rate modified	19
95/2	Electric or electrostatic field (e.g., electrostatic precipitation, etc.)	35
95/3	Concentration sensed	41
95/6	Current sensed	37
95/5	Sparking sensed	13
95/4	Temperature sensed	20
95/7	Voltage sensed	33
95/23	Gas flow rate sensed	94
95/24	Liquid level sensed	55
95/19	Pressure sensed	155
95/20	Apparatus cleaned	60
95/22	Gas flow rate modified	94
95/21	Sorbent regenerated	44
95/14	Temperature sensed	86
95/15	And pressure sensed	65
95/17	Cooling	25
95/18	Heating	59
95/16	Modification of flow rate of liquid which is added to gas	24
95/25	With recording or signaling condition	86
95/26	With timing of operation	109