| Patent Number |
Title Of Patent |
Date Issued |
| 4975181 |
Process and apparatus for ethylene production |
December 4, 1990 |
| There is disclosed an improved process and apparatus for the pyrolysis of a heavy hydrocarbon feed utilizing a transfer line reactor wherein pyrolysis reaction temperatures are achieved by contact of the heavy hydrocarbon feed with heated solid particles immediately followed by quenching |
| 4765398 |
Vaporization of liquids |
August 23, 1988 |
| Two immiscible liquids are vaporized in heat exchanger tubes in a manner such that each tube receives both liquids and neither liquid is completely vaporized in the tubes. |
| 4714109 |
Gas cooling with heat recovery |
December 22, 1987 |
| Rapid cooling of a gas with simultaneous heat recovery is accomplished by directly contacting the gas with finely divided solids, and then recovering heat from the finely divided solids by passing the solids through at least two separate compartments where the solids are maintained a |
| 4698219 |
Treatment of waste from iron ore reduction |
October 6, 1987 |
| Spent flux containing calcium oxide and calcium sulfide, recovered from the reduction of iron ore, is carbonated, as an aqueous slurry, in two stages, with the first stage being operated at a pH to prevent reaction of calcium sulfide, and the second stage being operated at a pH at which |
| 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 |
| 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 |
| 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. |
| 4385964 |
Method for preventing the undesirable condensation of aluminum chloride in a fractional distilla |
May 31, 1983 |
| A method is disclosed for preventing the condensation of aluminum chloride (AlCl.sub.3) in a fractional distillation column which is operated to separate a fraction which does not include AlCl.sub.3 from a mixture containing AlCl.sub.3 and other metal chlorides and which is operated at |
| 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 |
| 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 |
| 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 |
| 4246417 |
Treatment of waste water from nitrile production |
January 20, 1981 |
| Waste water recovered from a nitrile production effluent, containing ammonia, hydrogen cyanide, carbon dioxide and water soluble polymers is stripped of ammonia, carbon dioxide and hydrogen cyanide to produce an aqueous stream containing the water soluble polymer. At least a portion of |
| 4243650 |
Heat and volatized salt recovery from reaction effluent |
January 6, 1981 |
| A reaction effluent containing vaporized salt withdrawn from a reaction zone, such as a molten salt reaction zone, is contacted with solid particles to cool the gas and condense vaporized salt onto the particles. Such contacting may be effected in either a fluidized bed of solids or in |
| 4198212 |
Coal gasification effluent treatment |
April 15, 1980 |
| Coal is gasified to produce a coal gasification effluent and a char residue. The char residue is cooled by indirect heat transfer in a char bed, and the coal gasification effluent is passed through the cool char bed to effect cooling of the coal gasification effluent, with tars and oil |
| 4193944 |
Purging of inerts in chlorinated hydrocarbon production |
March 18, 1980 |
| A purge stream, containing inerts, some unreacted alkane and chlorinated hydrocarbon, is recovered from a chlorinated hydrocarbon production effluent and initially contacted with a first absorption oil recovered from the effluent which is at least one chlorinated hydrocarbon boiling at |
| 4190639 |
Recovery of hydrogen chloride in carbo-chlorination of metal oxides |
February 26, 1980 |
| In the conversion of a metal oxide to a metal chloride by reaction with chlorine and carbon monoxide wherein hydrogen chloride is produced as byproduct, the byproduct hydrogen chloride is contacted with a molten salt mixture containing the higher and lower valent chlorides of a multivale |
| 4134926 |
Production of ethylene from ethanol |
January 16, 1979 |
| Ethanol is dehydrated to ethylene at dehydration reaction conditions in the presence of a dehydration catalyst, with the reaction being effected in a fluidized bed of the dehydration catalyst. The use of a fluidized bed has been found to improve overall yields, with it being possible to |
| 4129604 |
Reactor effluent quench system |
December 12, 1978 |
| Process for recovering hydrogen chloride from an aqueous hydrogen chloride off-gas from an oxychlorination reaction wherein hydrogen chloride is separated from the off-gas as an aqueous solution of hydrogen chloride and employed as feed to an oxychlorination reaction. The process is |
| 4113786 |
Hydrogen chloride recovery |
September 12, 1978 |
| Process for recovering hydrogen chloride from a gas withdrawn from an oxychlorination reaction zone which contains hydrogen chloride and water vapor wherein the gas is initially cooled, followed by contacting the gas with a small amount of water to absorb the hydrogen chloride from the g |
| 4094915 |
Recovery of 12-dichloroethane from vinyl chloride production effluent |
June 13, 1978 |
| An effluent from a process for producing vinyl chloride includes 1,2-dichloroethane and heavier components, with the 1,2-dichloroethane being recovered, in a heavy ends stripping column by use of ethane and/or ethylene as stripping gas. The stripping gas is ultimately used for produc |
| 4074660 |
Waste heat recovery from high temperature reaction effluents |
February 21, 1978 |
| Additional waste heat recovery from a high temperature reaction effluent is effected by cooling the effluent in a shell and tube heat exchanger, having continuous tubes, with the shell being divided into two sections. In the first section, the effluent is cooled by indirect heat transfer |
| 4071571 |
Control of molten salt oxidation in production of chlorinated hydrocarbons |
January 31, 1978 |
| In the production of chlorinated hydrocarbons by contacting a molten salt mixture of the higher and lower chloride of a multivalent metal, such as a mixture of cuprous and cupric chloride, with molecular oxygen to effect oxidation to the oxychloride, followed by use of the oxidized salt |
| 4042640 |
Oxychlorination of hydrocarbons |
August 16, 1977 |
| In the oxychlorination of a hydrocarbon, the ratio of hydrocarbon feed to hydrogen chloride feed is maintained within set limits in response to changes in the concentration of aqueous hydrogen chloride recovered from the oxychlorination effluent. The concentration of aqueous hydrogen |
| 4039597 |
Carbon dioxide removal from chlorinated hydrocarbon production system |
August 2, 1977 |
| In the production of chlorinated hydrocarbons, a gas stream containing unreacted hydrocarbon, carbon dioxide, and chlorinated hydrocarbon(s) is contacted with an acid gas absorption solution to absorb carbon dioxide, with the absorption solution being stripped of any absorbed chlorinated |
| 4028427 |
Aqueous stream treatment in chlorinated hydrocarbon production |
June 7, 1977 |
| In the production of chlorinated hydrocarbons, a waste water stream is recovered from the effluent and stripped of chlorinated hydrocarbon impurities by the use of a portion of the hydrocarbon to be chlorinated as a stripping gas. In addition, an aqueous hydrogen chloride stream reco |
| 4002719 |
Recovery of nickel and cobalt carbonates from ammoniacal leach solutions |
January 11, 1977 |
| An ammonium carbonate leach solution containing dissolved nickel and/or cobalt values is sprayed into a flash chamber to flash a portion of the ammonia therefrom, resulting in the production of a fine precipitate of nickel and/or cobalt carbonate. The solution is introduced into a st |
| 3992460 |
Purging of tars and carbon from chlorinated hydrocarbon effluent |
November 16, 1976 |
| An effluent containing chlorinated hydrocarbons and tar, withdrawn from a reactor employing molten copper chlorides and oxychloride, is quenched to separate carbon and tars, and the separated carbon and tars introduced into the reactor to effect combustion thereof. The reaction is prefer |
| 3985816 |
Separation of 1,1-dichloroethane from 1,2-dichloroethane |
October 12, 1976 |
| In the fractionation of 1,1-dichloroethane and 1,2-dichloroethane, at least a portion of the reboil heat requirements for the fractionation is provided by chlorinating ethylene in the fractional distillation tower. The fractionation is particularly applicable to the production of vinyl |
| 3968200 |
Reactor effluent quench system |
July 6, 1976 |
| Process for recovering hydrogen chloride from an aqueous hydrogen chloride off-gas from an oxychlorination reaction wherein hydrogen chloride is separated from the off-gas as an aqueous solution of hydrogen chloride and employed as feed to an oxychlorination reaction. The process is |
| 3963584 |
Recovery of 1,2-dichloroethane from vinyl chloride production effluent |
June 15, 1976 |
| An effluent from a process for producing vinyl chloride includes 1,2-dichloroethane and heavier components, with the 1,2-dichloroethane being recovered, in a heavy ends stripping column by use of ethane and/or ethylene as stripping gas. The stripping gas is ultimately used for produc |
| 3948622 |
Separation of aqueous hydrogen chloride from gaseous chlorinated hydrocarbons |
April 6, 1976 |
| A chlorinated hydrocarbon stream is cooled to condense water vapor and a major portion of the hydrogen chloride as aqueous hydrogen chloride. The uncondensed portion is further cooled by direct quenching with aqueous quench liquid to condense further water vapor, with the quench circuit |
| 3946114 |
Process for making protein from hydrocarbons |
March 23, 1976 |
| Yeast is produced by fermenting hydrocarbons in an aqueous nutrient medium which includes sulfate, chloride and phosphate ions. When the fermentation is completed the nutrient medium has become depleted in mineral content and a large portion of it is purged. A calcium source is added to |
