Patents by Inventor Charles T. Ratcliffe
Charles T. Ratcliffe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4876408Abstract: A process for treating a molecular sieve-containing alkylation catalyst to increase its selectivity for monoalkylation in which the alkylation catalyst is contacted with a feedstock comprising at least one organic compound under conditions such that a sufficient amount of carbonaceous material evenly deposits on the alkylation catalyst to substantially suppress its alkylation activity. The carbon-containing catalyst particles are then subjected to combustion by contacting them with a gaseous oxidizing agent at an elevated temperature to remove at least a portion of the carbonaceous material, preferably substantially all of the carbonaceous material, thereby increasing the selectivity of the catalyst for monoalkylation by at least about 1.0 percentage point. The resulting alkylation catalyst an be used to alkylate benzene and other aromatic compounds with ethylene, propylene or other olefins to produce high yields of ethylbenzene, cumene and other alkylated products.Type: GrantFiled: October 3, 1988Date of Patent: October 24, 1989Assignee: Union Oil Company of CaliforniaInventors: Charles T. Ratcliffe, John W. Ward
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Patent number: 4798816Abstract: A process for treating a molecular sieve-containing alkylation catalyst to increase its selectivity for monoalkylation in which the alkylation catalyst is contacted with a feedstock comprising at least one organic compound under conditions such that a sufficient amount of carbonaceous material evenly deposits on the alkylation catalyst to substantially suppress its alkylation activity. The carbon-containing catalyst particles are then subjected to combustion by contacting them with a gaseous oxidizing agent at an elevated temperature to remove at least a portion of the carbonaceous material, preferably substantially all of the carbonaceous material, thereby increasing the selectivity of the catalyst for monoalkylation by at least about 1.0 percentage point. The resulting alkylation catalyst can be used to alkylate benzene and other aromatic compounds with ethylene, propylene or other olefins to produce high yields of ethylbenzene, cumene and other alkylated products.Type: GrantFiled: December 19, 1986Date of Patent: January 17, 1989Assignee: Union Oil Company of CaliforniaInventors: Charles T. Ratcliffe, John W. Ward
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Patent number: 4761162Abstract: Solid carbonaceous fuel is dried to a desired moisture content, cooled, and stored in an atmosphere having a controlled humidity and oxygen content to prevent heat generation which causes spontaneous combustion. A suitable atmosphere is produced by displacing air in a storage enclosure with dehumidified combustion gases.Type: GrantFiled: October 9, 1986Date of Patent: August 2, 1988Assignee: Union Oil Company of CaliforniaInventors: Charles T. Ratcliffe, Geoffrey E. Dolbear
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Patent number: 4668825Abstract: Methanethiol is produced from a gaseous feed comprising a mixture of H.sub.2 S and CO by contacting said feed with a catalyst comprising rutile titania at a temperature of at least about 225.degree. C.Type: GrantFiled: June 29, 1984Date of Patent: May 26, 1987Assignee: Exxon Research and Engineering Co.Inventors: Charles T. Ratcliffe, Petrus J. Tromp
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Patent number: 4570020Abstract: Methanethiol is produced from a gaseous feed comprising a mixture of H.sub.2 S and CO by contacting said feed, at a temperature of at least about 225.degree. C., with a catalyst comprising an oxide of a metal selected from the group consisting of V, Nb, and Ta and mixtures thereof, preferably V, supported on titania and wherein at least a portion, and preferably at least about 25 wt. %, of said supported oxide is in a non-crystalline form.Type: GrantFiled: June 29, 1984Date of Patent: February 11, 1986Assignee: Exxon Research and Engineering Co.Inventors: Charles T. Ratcliffe, Petrus J. Tromp, Israel E. Wachs
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Patent number: 4517171Abstract: Hydrogen and methane are synthesized from a gaseous feed comprising a mixture of H.sub.2 S and CO by contacting said feed with a catalyst comprising a sulfided rutile titania at a temperature of at least about 275.degree. C.Type: GrantFiled: June 29, 1984Date of Patent: May 14, 1985Assignee: Exxon Research and Engineering Co.Inventors: Charles T. Ratcliffe, Petrus J. Tromp
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Patent number: 4387247Abstract: In the reduction of di- or polynitro aromatic compounds by gaseous H.sub.2 S over a solid catalyst, addition of CO gas promotes formation of amino groups from all nitro groups in the molecule. A preferred embodiment is reduction of 2,4- and/or 2,6-dinitrotoluene in vapor phase at 325.degree. C. over a supported iron or supported cobalt catalyst on a support comprising alumina. The amino products are useful for production of polyurethane resins.Type: GrantFiled: June 11, 1980Date of Patent: June 7, 1983Assignee: Allied CorporationInventors: Charles T. Ratcliffe, Geza Pap
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Patent number: 4326081Abstract: Hydrogenation of mononitroaromatic compounds, particularly nitrobenzene, nitrotoluene and their monochloro and monohydroxy ring substitution products, using hydrogen sulfide as reducing agent and a titanium dioxide catalyst at 200.degree.-400.degree. C. and atmospheric pressure.Type: GrantFiled: February 23, 1981Date of Patent: April 20, 1982Assignee: Allied CorporationInventors: Charles T. Ratcliffe, Stuart L. Soled, Anthony J. Signorelli, Irving L. Mador
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Patent number: 4287128Abstract: A new process for preparing haloalkyl epoxides and oxaziranes is described in which a mixture of an perhalo alkene or alkyl imine and chlorine gas is contacted with a Group IA, IIA metal oxide, carbonate or bicarbonate under mild conditions of temperature and pressure. The process, using perhalo alkenes or perhalo alkyl imines as starting material, represents a new economical, facil preparation of the monomer hexafluoropropylene oxide, such monomer is capable of polymerizaton or copolymerization to thermally stable and inert polymers.Type: GrantFiled: April 18, 1980Date of Patent: September 1, 1981Assignee: Allied CorporationInventor: Charles T. Ratcliffe
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Patent number: 4235699Abstract: Conversion of coal to products soluble in common solvents and conversion of coal tar to products of lower molecular weight, effected in liquid or fused reaction medium using a hydrogenating reactant, are carried out employing hydrogen sulfide and carbon monoxide as the sole or major hydrogenating reactant, without need of elemental hydrogen or a hydrogen donor solvent.Type: GrantFiled: March 5, 1979Date of Patent: November 25, 1980Assignee: Allied Chemical CorporationInventors: Charles T. Ratcliffe, Mahmoud B. Abdel-Baset
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Patent number: 4233131Abstract: A process for the preparation of alkylene episulfides or episelenides is provided which comprises contacting elemental sulfur or elemental selenium, respectively, with an olefin, preferably ethylene, while irradiating with electromagnetic radiation in the infrared to ultraviolet range. The alkylene episulfides and episelenides are useful in the production of a variety of functional polymers.Type: GrantFiled: October 29, 1979Date of Patent: November 11, 1980Assignee: Allied Chemical CorporationInventors: Charles T. Ratcliffe, James T. Yardley
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Patent number: 4140752Abstract: A catalyst/adsorbent for sulfur dioxide from waste gases, via oxidation thereof to sulfur trioxide, comprising vanadium oxide supported on activated carbon, promoted by nickel sulfate or potassium sulfate, or preferably by both.Type: GrantFiled: July 25, 1977Date of Patent: February 20, 1979Assignee: Allied Chemical CorporationInventors: Charles T. Ratcliffe, Geza Pap
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Patent number: 4128586Abstract: A process for reducing aromatic sulfonyl halides with hydrogen sulfide. Hydrogen sulfide is contacted with sulfonyl halides preferably in the presence of a solvent and of a catalyst. The reaction forms thiols and proceeds in the range of between about 50.degree. and 300.degree. C. There is little formation of disulfide and no cleavage of the thiol group.Type: GrantFiled: February 27, 1978Date of Patent: December 5, 1978Assignee: Allied Chemical CorporationInventor: Charles T. Ratcliffe
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Patent number: 4115523Abstract: An improved process is described for producing hydroxylamine, NH.sub.2 OH, a valuable intermediate in the industrial manufacture of nylon-6, in which hydrogen sulfide is reacted with nitric oxide, or mixtures of nitrogen oxides, in aqueous acidic media containing a solid sulfur-resistant catalyst, such as activated carbon, at ambient temperature and pressure and substantially in the absence of elemental oxygen.An important aspect of the invention is that the industrial waste gases, hydrogen sulfide and nitrogen oxide, can be effectively utilized in the process.Type: GrantFiled: November 7, 1977Date of Patent: September 19, 1978Assignee: Allied Chemical CorporationInventor: Charles T. Ratcliffe
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Patent number: 4071606Abstract: A process is described for producing sulfur by the reaction of sulfur dioxide with agglomerating coal. The purity of the product gases is improved and the tendency of the coal to agglomerate is reduced by employing coal particles having a particle size below 500 microns.Type: GrantFiled: December 13, 1976Date of Patent: January 31, 1978Assignee: Allied Chemical CorporationInventors: Charles T. Ratcliffe, Geza Pap