Abstract: A method for the separation of methanol from MTBE contained in a reaction mixture comprising water, methanol, TBA and MTBE which comprises distilling the reaction mixture in the presence of added water in order to provide a distillate fraction containing most of the MTBE and a heavier distillation fraction containing most of the tertiary-butanol, water and methanol charged to the distillation column.
Abstract: In a process for producing a 3-halo-halobenzene or a 1-halo-3,5-dihalobenzene, a 2-halo-4-haloaniline or 2-halo-4,6-dihaloaniline is mixed with a deaminating agent. The 2-halo-4-haloaniline or 2-halo-4,6-dihaloaniline is deaminated so as to form a corresponding 3-halo-halobenzene or 1-halo-3,5-dihalobenzene.
Type:
Grant
Filed:
March 26, 1992
Date of Patent:
October 20, 1992
Assignee:
Mallinckrodt Specialty Chemicals Company
Abstract: Three phase reactions are carried out in a slurry bubble column, e.g., hydrocarbon synthesis, wherein rising gas bubbles fluidize a catalytically active solid dispersed in a liquid phase and in the presence of at least one other solid different chemically or physically from the catalytically active solid.
Type:
Grant
Filed:
February 25, 1991
Date of Patent:
October 20, 1992
Assignee:
Exxon Research and Engineering Company
Inventors:
Eric Herbolzheimer, Frederick J. Kaiser, Jr., Enrique Iglesia
Abstract: A process for the preparation of chlorofluoropropanes of the formula C.sub.3 HCl.sub.2 F.sub.5 by contacting monofluorodichloromethane with tetrafluoroethylene in the presence of a modified aluminum chloride catalyst at a temperature of 0.degree. to 150.degree. C. The novel compound CF.sub.3 CCl.sub.2 CHF.sub.2 is also disclosed.
Type:
Grant
Filed:
April 5, 1991
Date of Patent:
October 20, 1992
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Allen C. Sievert, Carl G. Krespan, Frank J. Weigert
Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in the presence of a catalyst to provide methyl-tert-butyl ether and the improvement of accomplishing the reaction in one-step which comprises:a. contacting the reactants with a montmorillonite silica-alumina catalyst which has been treated with hydrogen fluoride;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl tert-butyl product, wherein under certain conditions the product mix separates into an isobutylene-MTBE product-rich phase and a heavier aqueous methanol phase.
Abstract: A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in one step to provide methyl tert-butyl ether and the improvement of accomplishing the reaction which comprises:a. Using a catalyst consisting of a montmorillonite clay, optionally pretreated with a mineral acid, then treated with a fluorosulfonic acid;b. continuously contacting said t-butanol and methanol in a molar amount of about 0.1 to 10 moles of methanol per mole of t-butanol with said catalyst at a temperature of about 20.degree. C. to about 250.degree. C. and a pressure of about atmospheric to about 1000 psig to obtain the methyl tert-butyl ether product.
Abstract: Herein are disclosed (1) an oil-soluble N-long chained acyl acidic amino acid mono- or di-ester having at least one sterol ester in the molecule, which is a novel compound of excellent emulsifying and hydrating performances, (2) an oily composition consisting of or comprising a mixture of such esters, and (3) perfuming cosmetics blended with such ester or such oily composition.
Abstract: A method for selectively oxygenating methane to carbon monoxide and hydrogen by bringing the reactant gas mixture at a temperature of at least 600.degree. C. into contact with a sold catalyst which is either:a) a catalyst of the formula M.sub.x M'.sub.y O.sub.z where:M is at least one element selected from Mg, B, Al, Ln, Ga, Si, Ti, Zr and Hf,Ln is at least one member of lanthanum and the lanthanide series of elements,M'is a d-block transition metal,and each of the ratios x/z and y/z and (x+y)/z is independently from 0.1 to 8; orb) an oxide of a d-block transition metal; orc) a d-block transition metal on a refractory support; ord) a catalyst formed by heating a) or b) under the conditions of the reaction or under non-oxidizing conditions.
Type:
Grant
Filed:
June 29, 1990
Date of Patent:
September 22, 1992
Assignee:
Gas Research Institute
Inventors:
Malcolm L. H. Green, Anthony K. Cheetham, Patrick D. F. Vernon
Abstract: An improved catalyst for the Fisher-Tropsch process, effective at low temperatures and at low catalyst metal loadings on a support, comprises ruthenium and bromine moieties on a support such as gamma alumina.
Abstract: A process for synthesizing di-isopropyl ether (DIPE) by etherification of isopropanol. A multi-stage process can employ propene in mixture with other feedstock materials, such as propane from refinery gas, in a primary hydration stage to produce isopropanol. The isopropanol is enriched between stages to remove water. In the second reaction stage the isopropanol is converted catalytically with large pore acidic zeolite to yield DIPE, which can be separated to recover pure propene.
Type:
Grant
Filed:
May 6, 1991
Date of Patent:
September 1, 1992
Assignee:
Mobil Oil Corporation
Inventors:
Mohsen N. Harandi, Werner O. Haag, Hartley Owen, Weldon K. Bell
Abstract: A process for producing an ethylene oxide-capped polyol which is essentially free of catalyst residues, wherein the polyol is produced using a double metal cyanide catalyst, which comprises after polyol formation the steps of: (a) contacting a catalyst residue(s)- containing polyol with an effective amount of an oxidant (preferably selected from the group consisting of: oxygen-containing gas(es), peroxide(s), acids, and combinations thereof) to cause said catalyst residue(s) to form insoluble residues that are insoluble in the polyol; (b) separating the insoluble residues from the polyol to provide an essentially double metal cyanide catalyst residue-free polyol; (c) treating said double metal cyanide catalyst residue-free polyol with a base to provided a base-treated polyol; (d) contacting said base-treated polyol with ethylene oxide to produce an ethylene oxide-capped polyol containing base, wherein at least a portion of the secondary hydroxyl groups on said polyol are converted into primary hydroxyl groups
Type:
Grant
Filed:
April 29, 1991
Date of Patent:
September 1, 1992
Assignee:
Olin Corporation
Inventors:
John W. Reisch, Michael M. Martinez, Maurice Raes
Abstract: The present invention relates to a method for the inhibition of C.sub.17-20 lyase enzyme which comprises administering to a patient in need of such inhibition, an effective amount of certain 4-amino-17-(hydroxyalkyl or dihydroxyalkyl)steroids or their esters or ethers. Certain of the aminosteroids used in the process are novel compounds.
Type:
Grant
Filed:
March 19, 1991
Date of Patent:
September 1, 1992
Assignee:
Merrell Dow Pharmaceuticals Inc.
Inventors:
Philip M. Weintraub, Cynthia A. Gates, Thomas R. Blohm
Abstract: Olefins are converted to alcohols and/or ethers employing, as catalyst, an acidic zeolite which has been bound with an essentially non-acidic refractory oxide of at least one metal of Group IVA and/or IVB of the Period Table of the Elements, e.g., silica, titania, zirconia and/or germania.
Type:
Grant
Filed:
November 20, 1991
Date of Patent:
September 1, 1992
Assignee:
Mobil Oil Corporation
Inventors:
Charles M. Sorensen, Philip Varghese, David O. Marler
Abstract: Improved process techniques and equipment for reacting crude aqueous ethanol feedstock with iso-olefinic hydrocarbons to produce C.sub.6.sup.+ ethyl t-alkyl ethers, which comprises: distilling the aqueous ethanol feedstock; contacting ethanol rich distillate overhead containing a minor amount of water with a liquid hydrocarbon extractant rich in C.sub.4.sup.+ isoalkene under liquid extraction conditions; recovering an aqueous phase containing water introduced from the overhead; recovering an organic extract phase comprising the hydrocarbon extractant and a major amount of ethanol introduced in the feedstock; and reacting the extracted ethanol and C.sub.4.sup.+ isoalkene in contact with an acid etherification catalyst under catalytic reaction conditions to produce ether product.
Abstract: A process for the preparation of novel binder-containing titania supports, and catalyst compositions of improved porosity prepared from such supports, useful for Fischer-Tropsch synthesis. The supports are prepared by incorporating a small amount of an inorganic metal oxide binder, constituted of alumina, zirconia or silica, with titania. The catalysts are prepared by dispersing a catalytically effective amount of a metal, or metals, preferably cobalt, or cobalt plus an additional metal, or metals catalytically active in a Fischer-Tropsch reaction on the titania binder support.
Abstract: This invention relates to a process for producing C.sub.2 -C.sub.20 olefins from a feed stream consisting of H.sub.2 and CO.sub.2 using an iron-carbide based catalyst.
Type:
Grant
Filed:
May 6, 1991
Date of Patent:
August 18, 1992
Assignee:
Exxon Research and Engineering Co.
Inventors:
Rocco A. Fiato, Stuart L. Soled, Gary W. Rice, Sabato Miseo
Abstract: A process for the production of 3-deoxy-4-ene steroids of the general formula I ##STR1## is described, in which R.sub.1, R.sub.2 and R.sub.3 mean a hydrogen atom or a methyl group,R.sub.4 represents a lower alkyl group, a phenyl group or a free, esterified or etherified hydroxy group,R.sub.5 symbolizes a hydrogen atom, a vinyl group or the grouping --C.tbd.CR.sub.6 with R.sub.6 meaning a hydrogen atom, an alkyl group with a maximum of 4 carbon atoms or a halogen atom,X represents a methylene group, a fluoromethylene group, an ethylidene group or a vinylidene group,Y and U represent a methylene group or an ethylidene group andZ symbolizes a methylene group, an ethylidene group, a vinylidene group, a chloromethylene group or a hydroxymethylene group and in which the bonds represent three single bonds or one double bond and two single bonds or a conjugated double bond.
Type:
Grant
Filed:
January 17, 1991
Date of Patent:
August 18, 1992
Assignee:
Schering Aktiengesellschaft
Inventors:
Ekkehard Winterfeldt, Ulf Tilstamm, Helmut Hofmeister, Henry Laurent
Abstract: A halogenated alkyl of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and each is a lower alkyl group, X is chlorine atom or a bromine atom and Y is a hydrogen atom or a halogen atom is prepared in high conversion and high selectivity by reacting a tertiary halogenated alkyl of the formula: ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and X are the same as defined above with an ethylene derivative of the formula:CH.sub.2 .dbd.CH--Y (III)wherein Y is the same as defined above in the presence of a liquid catalyst comprising aluminum chloride and an alkylbenzene of the formula: ##STR3## wherein R.sub.4, R.sub.5 and R.sub.6 are the same or different and each is a lower alkyl group or a hydrogen atom provided that at least one of them is a lower alkyl group.
Abstract: Disclosed is a process for regeneration of a 13X zeolite catalyst comprising conducting the following steps within the regeneration zone wherein the 13X zeolite is located.(1) Applying vacuum or delivering a source of molecular oxygen or inert gas at a temperature above 100.degree. C. to remove a portion of the volatile compounds from the 13X zeolite,(2) Cooling the 13X zeolite to a temperature below 100 degrees C.,(3) Contacting the 13X zeolite with an aqueous solution having a pH in the range of 7 to 14,(4) Drying the 13X zeolite,(5) Delivering an oxygen containing calcination gas to the regeneration zone and heating the 13X zeolite to a temperature in the range of 350.degree. to 450.degree. C.,(6) Cooling the 13X zeolite to a temperature below 100 degrees C., and(7) Contacting the 13X zeolite with an aqueous solution having a pH in the range of 7 to 14.
Type:
Grant
Filed:
October 15, 1991
Date of Patent:
August 11, 1992
Assignee:
Eastman Kodak Company
Inventors:
Gerald C. Tustin, Joseph F. Jeter, Richard I. Garrity
Abstract: A process for production of ether by hydration and etherification of olefinic feedstock containing at least one lower alkene by contacting the olefinic feedstock and water in a plurality of catalytic reaction zones containing porous solid metal oxide acidic olefin hydration and etherification catalyst under olefin hydration and etherification conditions. Improved operation is achieved by recovering a first effluent stream from at least one fixed bed hydration zone, splitting the first effluent stream into a product recovery stream and a plurality of recycle streams, and passing at least a portion of cooled recycle streams comprising olefin, alcohol and ether in effluent stream component proportions for quenching at least one fixed bed reaction zone to control temperature of hot effluent from a preceding reaction zone.
Type:
Grant
Filed:
November 18, 1991
Date of Patent:
August 11, 1992
Assignee:
Mobil Oil Corporation
Inventors:
James H. Beech, Jr., James A. Stoos, Stephen S. F. Wong, Sergei Yurchak