| Patent Number |
Title Of Patent |
Date Issued |
| 4857151 |
Phenol purification |
August 15, 1989 |
| Crude phenol containing methyl benzofuran and other impurities is distilled in the presence of water to recover a phenol bottoms having a reduced quantity of impurities. The water-phenol overhead is cooled to separate a water phase essentially free of methyl benzofuran, which is recycled |
| 4851086 |
Production of high purity phenol by steam distillation |
July 25, 1989 |
| Crude phenol, containing AMS by-product, and MBF impurity, is distilled in the presence of water to separate MBF impurity. |
| 4558167 |
Hydrogen chloride-propylene separation |
December 10, 1985 |
| Hydrogen chloride is recovered from a mixture with propylene by extractive distillation with an inert extraction solvent to minimize reaction between hydrogen chloride and propylene during such distillation. The temperature and pressure conditions are coordinated with the extraction solv |
| 4544476 |
Coal liquefaction and hydrogenation |
October 1, 1985 |
| In a two-stage liquefaction, hydrogenated 850.degree. F.+ residuum from the second stage is used in formulating the first stage liquefaction solvent. |
| 4539183 |
Distribution grid support structure |
September 3, 1985 |
| A support structure for a distribution grid to be mounted in a reaction vessel wherein the reaction vessel is formed with an inwardly-extending annular shoulder portion to which is mounted, such as by welding, a ring-member whereby the distribution grid is mounted on such support str |
| 4532012 |
Production of high purity phenol by distillation with steam and a solvent |
July 30, 1985 |
| Phenol containing MBF impurity is distilled in the presence of water and an extraction solvent for MBF (preferably AMS and/or cumene) to recover a phenol bottoms having reduced impurities. The use of solvent permits a reduction in the amount of water used, which reduces the amount of phe |
| 4522700 |
Coal liquefaction |
June 11, 1985 |
| In a two-stage liquefaction wherein coal, hydrogen and liquefaction solvent are contacted in a first thermal liquefaction zone, followed by recovery of an essentially ash free liquid and a pumpable stream of insoluble material, which includes 850.degree. F.+ liquid, with the essentially |
| 4511670 |
Catalysts containing mixed oxides of vanadium, phosphorus, and aluminum and/or boron |
April 16, 1985 |
| A mixed oxide catalyst precursor comprising vanadium and phosphorus treated in finely divided form with phosphoric acid and water soluble compound of aluminum and/or boron to improve resistance to attrition. |
| 4510258 |
Catalysts containing mixed oxides of vanadium and phosphorus |
April 9, 1985 |
| Mixed oxide catalyst of vanadium and phosphorus prepared by a procedure including pretreating the dried catalyst precursor of the said mixed oxides in finely divided form with an acid solution. |
| 4504364 |
Phenol purification |
March 12, 1985 |
| In the production of high purity phenol, a water-phenol mixture recovered from the top of a distillation column is contacted with a water immiscible solvent to extract methyl benzofuran and other by-products and impurities in phenol production therefrom, with the extraction being accompl |
| 4503231 |
Hydrolysis of nitriles to amides with quaternary ammonium hydroxide |
March 5, 1985 |
| Hydrolysis of nitrile to amide by use of a quaternary ammonium hydroxide at 60.degree. to 95.degree. C. |
| 4502997 |
Treatment of purge gas |
March 5, 1985 |
| The invention relates to a process for treating purge gas including carbon dioxide, water vapor, organics and ammonia. In accordance with the invention, the purge gas is scrubbed with water to absorb ammonia and water is added to the scrubbed purge gas in an amount in excess of the a |
| 4496777 |
Production of halohydrins |
January 29, 1985 |
| Production of halohydrins; in particular, chlorohydrins by reaction of tertiary alkyl hypohalite and olefinically unsaturated compound in the presence of water and a water soluble salt of an amphoteric metal; in particular, a salt of tin, aluminum, zinc, zirconium, magnesium, or tita |
| 4496752 |
Production of epoxy compounds from olefinic compounds |
January 29, 1985 |
| Chlorine and tertiary alkanol dissolved in an inert organic solvent are reacted with aqueous alkali to produce tertiary alkyl hypochlorite which is recovered in the organic solvent and reacted with water and olefinically unsaturated compound to produce chlorohydrin and tertiary alkan |
| 4479020 |
Production of halohydrins |
October 23, 1984 |
| Production of halohydrins; in particular, chlorohydrins by reaction of tertiary alkyl hypohalite and olefinically unsaturated compound in the presence of water and a metal selected from Group II-A, II-B, III-A, III-B, IV-A, IV-B, or V-A of the Periodic Table. The use of such metals i |
| 4476160 |
Fluidized bed system |
October 9, 1984 |
| In a fluidized bed system, including a fluidized bed vessel and a separate stripping vessel below the fluidized bed wherein solids from the fluidized bed are introduced into the stripping vessel, there is provided a vent line from the top of the stripping vessel to the fluidized bed for |
| 4446914 |
Dry cooling tower |
May 8, 1984 |
| An air cooled dry cooling tower (10) has two sets of heat exchange assemblies (14,15) whose radiator surface (16) (e.g. tubular bundles) is substantially horizontally disposed, generally in the form of two frustra of cones whose axes are on or near the vertical tower center-line, the |
| 4443620 |
Production of epoxy compounds from olefinic compounds |
April 17, 1984 |
| Chlorine and tertiary alkanol dissolved in an inert organic solvent are reacted with calcium oxide in aqueous calcium chloride to produce tertiary alkyl hypochlorite which is recovered in the organic solvent and reacted with water and olefinically unsaturated compound to produce chlorohy |
| 4439313 |
Removal of arsenic impurity from hydrocarbons |
March 27, 1984 |
| Arsenic is removed from a hydrocarbon containing arsenic as an impurity; e.g., shale oil, by contact with hydrogen in the presence of a contact material, such as coke, to deposit the arsenic on the contact material. The arsenic deposited on the contact material is subsequently reacted wi |
| 4434048 |
Hydrotreating catalyst and use thereof |
February 28, 1984 |
| A catalyst for hydrotreating of heavy feedstocks comprised of nickel and molybdenum, supported on alumina having a defined pore size distribution which has been calcined at a temperature of from 1150.degree. F. -1300.degree. F. Calcining of such catalyst at such temperatures is requi |
| 4423022 |
Processes for carrying out catalytic exothermic and endothermic high-pressure gas reactions |
December 27, 1983 |
| Processes for carrying out catalytic exothermic and endothermic high-pressure gas reactions with a single-walled pressure vessel or shell containing cross-flow (e.g., radial flow) heat transfer exchangers, a continuous catalytic bed having at least two stages, and means for effecting |
| 4415357 |
Solid waste treatment in reduction of iron ore |
November 15, 1983 |
| In the direct reduction of iron ore wherein a solid mixture of unused carbonaceous reductant and spent flux is roasted to convert calcium sulfide to sulfate, the solids recovered from the roasting are carbonated to further reduce the sulfide content, and convert calcium oxide to the |
| 4414141 |
Hydrotreating catalyst |
November 8, 1983 |
| A catalyst for hydrotreating of heavy feedstocks comprised of nickel and molybdenum, supported on alumina having a defined pore size distribution which has been calcined at a temperature of from 1150.degree. F.-1300.degree. F. Calcining of such catalyst at such temperatures is requir |
| 4410714 |
Production of epoxy compounds from olefinic compounds |
October 18, 1983 |
| A process for producing an epoxy compound by chlorinating a tertiary alkanol to the corresponding hypochlorite, followed by reaction of the hypochlorite with water and an olefinically unsaturated compound to produce the corresponding chlorohydrin and saponification of the chlorohydri |
| 4405439 |
Removal of quinoline insolubles from coal derived fractions |
September 20, 1983 |
| Coal tar pitch is contacted with a promoter liquid having a 5 volume percent distillation temperature of at least 250.degree. F. and a 95 volume percent distillation temperature of at least 350.degree. F. and no greater than about 750.degree. F. with the liquid having a characterizat |
| 4391880 |
Recovery of heat and vaporized material from a reaction effluent |
July 5, 1983 |
| Process and system for cooling a reaction effluent containing volatized catalyst wherein the effluent is contacted with circulating cooled solid catalyst in dilute phase transport contact, with the volatized catalyst being condensed onto the solid catalyst. |
| 4376865 |
Production of epoxy compounds from olefinic compounds |
March 15, 1983 |
| Olefin is reacted with alkyl hypochlorite and water to produce an effluent containing the chlorohydrin and alkanol. An organic solvent is employed to extract the alkanol and chlorohydrin from the aqueous effluent, followed by saponification with base to produce olefin oxide. Olefin oxide |
| 4360405 |
Process for fractionating close boiling components of a multi-component system |
November 23, 1982 |
| There is disclosed a process and apparatus for the fractionation of close boiling components of a multi-component system and comprised of at least two fractionation columns having a plurality of equilibrium stages wherein the vapor from a down-stream fractionation column is compressed an |
| 4356336 |
Purging of inerts in chlorinated hydrocarbon production |
October 26, 1982 |
| In the production of a chlorinated hydrocarbon, such as chlorinated methanes, a purge stream is recovered from the chlorinated hydrocarbon effluent, which contains inerts and unreacted hydrocarbon. The unreacted methane present in the purge stream is combusted to recover the fuel val |
| 4353162 |
Apparatus and process for manufacturing finned tubes |
October 12, 1982 |
| Apparatus and process for manufacturing a finned tube, said apparatus comprising a tube feed assembly which has absolute control over the rotational speed of the bare tube being processed as well as the linear feed rate thereof, a grooved roller assembly (when forming an applied fin |
| 4351819 |
Recovery of chlorine values in integrated process for oxychlorination and combustion of chlorina |
September 28, 1982 |
| In an integrated process for oxychlorination and combustion of chlorinated hydrocarbons, chlorinated hydrocarbon is burned to recover chlorine values essentially as hydrogen chloride. Hydrogen chloride is recovered from the effluent from the combustion by absorption with aqueous hydrogen |
| 4348537 |
Olefin oxidation |
September 7, 1982 |
| Olefin is oxidized in the absence of oxygen with a carboxylic acid in the presence of Mn(IV) oxide promoted with a noble metal to produce an effluent which includes mono and/or diester corresponding to the olefin and acid. |
| 4346069 |
Recovery of chlorine values in integrated process for oxychlorination and combustion of chlorina |
August 24, 1982 |
| In an integrated process for oxychlorination and combustion of chlorinated hydrocarbons, chlorinated hydrocarbons is burned to recover chlorine values essentially as hydrogen chloride. Combustion effluent and off-gas from an oxychlorination reaction are simultaneously treated to recover |
| 4346047 |
Production of phosgene |
August 24, 1982 |
| A molten salt containing the higher and lower valent chlorides, such as mixture of cuprous and cupric chloride, is contacted with oxygen and hydrogen chloride to enrich the salt in the higher valent metal chloride. The salt enriched in the higher valent metal chloride is contacted with |
| 4343691 |
Heat and water recovery from aqueous waste streams |
August 10, 1982 |
| A hot aqueous waste, containing solids, such as tailings from the hot water extraction of bitumen from tar sands, is contacted with air to increase the heat and moisture content of the air, followed by contacting the heated and moisturized air with water to condense moisture from the air |
| 4342735 |
Stripping of aqueous ammonium carbonate solution |
August 3, 1982 |
| In stripping ammonia and carbon dioxide from an aqueous ammonium carbonate solution including organic ammonium salts, inorganic base is introduced into the column at a point below the point of the feed introduction and above the column bottom to liberate ammonia from the ammonium salts a |
| 4342703 |
Production of alkyl hypohalites |
August 3, 1982 |
| Alkyl hypohalites are produced by reaction of tertiary alkanol with chlorine and aqueous base, or prechlorinated aqueous base, in a high back-mix recycle loop reactor operated at a recycle ratio of at least 5:1 to thereby control reaction temperature and permit the use of short react |
| 4342642 |
Steam pyrolysis of hydrocarbons |
August 3, 1982 |
| A portion of a steam pyrolysis tubular coil, preferably the outlet portion, is provided with an insert to provide a radiation absorption surface within the tube. The insert is dimensioned to increase heat flux without adversely increasing pressure drop. A preferred insert has a central b |
| 4341737 |
Apparatus for carrying out catalytic exothermic and endothermic high-pressure gas reactions |
July 27, 1982 |
| Apparatus for carrying out catalytic exothermic and endothermic high-pressure gas reactions, comprising a single-walled pressure vessel or shell containing cross-flow (e.g., radial flow) heat transfer exchangers, a continuous catalytic bed having at least two stages, and means for ef |
| 4329525 |
Production of chlorinated compounds by use of molten salts |
May 11, 1982 |
| A compound is chlorinated with chlorine to produce chlorinated product and hydrogen chloride byproduct. Recovered hydrogen chloride byproduct is contacted with oxygen and a molten salt mixture containing the higher and lower valent chlorides of a multivalent metal, such as cuprous and cu |
| 4327219 |
Nicotinamide production |
April 27, 1982 |
| In the hydrolysis of nicontinonitrile to nicotinamide, the hydrolysis effluent, containing nicotinamide, unconverted nicotinonitrile, ammonia and some ammonium nicotinate is stripped with gaseous ammonia to produce a molten nicontinamide bottoms, essentially free of nicotinonitrile, |
| 4326853 |
Coke production from liquid derived from sub-bituminous and/or lignitic coal |
April 27, 1982 |
| In the liquefaction of a sub-bituminous and/or lignitic coal, an ash containing coal liquid is heated to a temperature of from 410.degree. C. to 450.degree. C., and delayed coked adiabatically at a pressure of from 15 psig to 120 psig to produce an ash containing soft coke, having a |
| 4316793 |
Hydroliquefaction of coal |
February 23, 1982 |
| Coal is catalytically hydroliquefied by passing coal dispersed in a liquefaction solvent and hydrogen upwardly through an expanded catalyst bed in a stream having a cross-sectional flow area of no greater than 255 inches square, with the stream through the catalyst bed having a length |
| 4316792 |
Hydroliquefaction of coal |
February 23, 1982 |
| Coal is catalytically hydroliquefied by passing coal dispersed in a liquefaction solvent and hydrogen upwardly through a plurality of parallel expanded catalyst beds, in a single reactor, in separate streams, each having a cross-sectional flow area of no greater than 255 inches square, |
| 4315802 |
Process and apparatus for fractionating close boiling components of a multi-component system |
February 16, 1982 |
| There is disclosed a process and apparatus for the fractionation of close boiling components of a multi-component system and comprised of at least two fractionation columns having a plurality of equilibrium stages wherein the vapor from a downstream fractionation column is compressed and |
| 4304917 |
Crystallization process |
December 8, 1981 |
| In the crystallization of a material from a liquid solution thereof wherein normal rapid cooling produces a non-filterable solid, the mixture of material and liquid is subjected to a high shear force field to produce a filterable slurry of the material, with the mixture being subjected t |
| 4292170 |
Removal of quinoline insolubles from coal derived fractions |
September 29, 1981 |
| Coal tar pitch is contacted with a promoter liquid having a 5 volume percent distillation temperature of at least 250.degree. F. and a 95 volume percent distillation temperature of at least 350.degree. F. and no greater than about 750.degree. F., with the liquid having a characteriza |
| 4288234 |
Recovery of aromatics from styrene production off-gas |
September 8, 1981 |
| An off-gas from a process for producing styrene from ethylbenzene, which contains non-condensables; in particular, hydrogen, as well as some aromatics; in particular, ethylbenzene, is contacted with a higher boiling absorption oil to scrub aromatics from the off-gas and provide an off-ga |
| 4284781 |
Supported vanadia catalyst and use thereof for nitrile production |
August 18, 1981 |
| Vanadia supported on a silica-alumina or gamma-alumina support in an amount to provide a vanadia to support weight ratio ranging from about 0.3:1 to about 3:1 substantially entirely within the pores of the support, the vanadia having been placed in molten form substantially within the po |
| 4277630 |
Catalyst and process for producing aromatic hydroxy compounds |
July 7, 1981 |
| A catalyst comprised of oxidized copper, zirconium and an alkali metal is employed for oxidizing an aromatic carboxylic acid to the corresponding phenol; e.g., benzoic acid to phenol. |
