Abstract: An integrated two stage process for the production of isoolefin by the dehydration of isoalcohol and the synthesis of a corresponding ether, for example the production of methyl tertiary butyl ether by (a) feeding tertiary butyl alcohol to a first distillation column reactor into a feed zone; (b) concurrently in said first distillation column reactor (i) contacting said TBA with an acid ion exchange resin catalyst as a component of a distillation structure, at a temperature in the range of 165.degree. to 200.degree. F.
Type:
Grant
Filed:
March 30, 1992
Date of Patent:
July 27, 1993
Assignee:
Chemical Research & Licensing Company
Inventors:
Robert P. Arganbright, Bradley S. Hearn
Abstract: There is provided a process for converting light olefin to alcohol(s), ether(s) or mixtures of alcohol(s) and ether(s) which comprises contacting a feed containing at least one light olefin with water in the vapor and/or liquid phase under olefin hydration conditions in the presence of MCM-36 as olefin hydration catalyst to produce said alcohol(s) and/or ether(s).
Abstract: The addition of water into a Fischer-Tropsch hydrocarbon synthesis reaction zone employing passing a CO and H.sub.2 feed mixture over a catalyst comprising cobalt, ruthenium and mixtures thereof preferably on a titania support and which may include a promoter metal, that results in 90% CO conversion to hydrocarbons and increased C.sub.5 + hydrocarbon selectivity, along with a decrease in methane production.
Abstract: A process is disclosed for the production of alkyl tertiary alkyl ether from alkanol and iso-olefin employing zeolite catalyst, particularly zeolite Beta, that results is a high ether selectivity and a significant reduction in the formation of olefin oligomer by-product. The improvement is realized by incorporating a catalyst pretreatment step in the overall etherification process. The zeolite catalyst pretreatment comprises either steaming or a hydrothermal treatment using liquid water at elevated temperature. The process is particularly effective in reducing the formation of dimer by-product in the zeolite Beta catalyzed process for the formation of MTBE with high selectivity.
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 in accomplishing the reaction which comprises:a. Using a catalyst consisting of a crystalline aluminosilicate faujasite Y-type zeolite which has been treated with a fluorophosphoric 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: A process for preparing an alkoxylation catalyst in which a catalyst is formed by admixing an alkoxylated alcohol with a calcium or strontium containing compound which is dispersible in the alkoxylated alcohol, an inorganic acid and a titanium alkoxide, the pre-mix optionally being heated to a temperature and for a time sufficient to effect at least partial exchange reaction between the alkoxide groups of the titanium alkoxide and the hydroxyl groups of the alkoxylated alcohol, the pre-mix being used in an alkoxylation process to alkoxylate active hydrogen containing compounds such as alcohols.
Abstract: A process for the production of methanol by reacting a gaseous mixture comprising hydrogen and carbon monoxide in the presence of a catalyst composition in the form of a fluidized bed whilst cooling, characterized in that the catalyst composition is present in a plurality of interconnected fluidized bed sections whereby each section is cooled by at least one heat exchanger and whereby the temperature in the highest section is reduced to below the highest temperature in a lower section.
Abstract: A one-step process is disclosed for the coproduction of dimethyl ether and methanol from synthesis gas containing H.sub.2, CO, and CO.sub.2. The synthesis gas is contacted with a mixture of methanol synthesis and methanol dehydration catalysts suspended in an inert liquid in a three phase reactor system. Maximum dimethyl ether productivity and product energy recovery are realized by controlling the fraction of methanol synthesis catalyst in the range of about 75 to about 90 wt % of the total catalyst mixture. A methanol-rich fuel product containing dimethyl ether can be obtained when this range is about 95 to about 99.9 wt %.
Type:
Grant
Filed:
April 23, 1992
Date of Patent:
June 8, 1993
Assignee:
Air Products and Chemicals, Inc.
Inventors:
John J. Lewnard, Thomas H. Hsiung, James F. White, Bharat L. Bhatt
Abstract: A process for the production of methanol by reacting a gaseous mixture comprising hydrogen and carbon monoxide in the presence of a catalyst composition in a fluidized bed while cooling, characterized in that the reaction is carried out in a plurality of fluidized catalyst bed reactors in series with interstage removal of methanol from the reaction mixture.
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 comprising a montmorillonite clay treated with a haloacid;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: A combination of an etherification process and a process for the isomerization of linear alkenes to isoalkenes uses a separation zone that receives an effluent stream from the etherification reaction zone and separates it into a high boiling stream, a low boiling stream and an intermediate boiling stream in order to reduce the mass flow of reactants through the isomerization and etherification reaction zones. The separation zone normally has an arrangement of a distillation column. The distillation column can provide a distillation function only, or can also provide a reactive distillation zone. The intermediate boiling stream typically leaves the column as a sidecut which in the case of reactive distillation is taken from the point above a bed of catalyst within the column. Taking the sidecut stream substantially eliminates the circulation of isoalkane hydrocarbons through the etherification and isomerization zone and maintains normal alkanes at an acceptable equilibrium level.
Type:
Grant
Filed:
May 15, 1992
Date of Patent:
May 11, 1993
Assignee:
UOP
Inventors:
Charles P. Luebke, Bipin V. Vora, David A. Wegerer, Joseph E. Zimmermann, Kevin C. Buck
Abstract: In a process for production of vinylidene chloride by dehydrohalogenation of 1,1,2-trichloroethane using a base, improved selectively for formation of vinylidene chloride is obtained by using as the base a cyclic amine having a pK.sub.a greater than about 11 as dehydrohalogenating agent.
Abstract: In the process described for the preparation of alkoxylates having a narrow distribution of homologs by reaction of compounds containing at least one hydroxyl group with alkylene oxide, complex compounds of antimony pentahalide with a special Lewis base are used as the catalysts. Alkoxylates having a narrow distribution of homologs and good color quality are obtained at a high conversion.
Abstract: Alkylene oxide adducts of organic compounds having active hydrogen atoms are prepared by a process which comprises contacting and reacting an alkylene oxide reactant comprising one or more vicinal alkylene oxides with an active hydrogen containing reactant comprising one or more compounds having active hydrogen atoms in the presence of a catalyst which comprises one or more compounds comprising a rare earth element and phosphorus supported on an inert porous support. The product alkoxylates are known to be useful, for instance, as nonionic surfactants, wetting and emulsifying agents, solvents, and chemical intermediates.
Abstract: An improved process is disclosed for the acid catalyzed production of DIPE from propene and water feedstreams that eliminates the propene recycle stream to the olefin hydration reactor and achieves high propene conversion. The accomplishment is achieved by carrying out the hydration and etherification reactions in two stages wherein the first stage comprises a zeolite catalyzed hydration and etherification of propene employing a minimum of water feed. The second stage converts unconverted propene from the first stage reactor by hydration and etherification to DIPE in contact with an acidic catalyst, preferably acidic resin, and an excess of water. Isopropanol (IPA) from both the first and second stage reactor is recovered as an aqueous azeotrope by a combination of distillation and extraction steps and the azeotrope is recycled to the first stage reactor.
Abstract: A method for producing allyl chloride by oxychlorination of propylene, which comprises reacting propylene, hydrogen chloride and oxygen in the presence of a catalyst comprising an alloy of tellurium supported on a carrier.
Abstract: A process for producing tetrahydrofuran polymers having a narrow molecular weight distribution is disclosed. Tetrahydrofuran is polymerized in the presence of a carboxylic acid anhydride and amorphous silica-alumina. The process overcomes the need for costly post-treatment techniques such as distillation and selective solvent extraction.
Type:
Grant
Filed:
February 19, 1992
Date of Patent:
May 4, 1993
Assignee:
Arco Chemical Technology, L.P.
Inventors:
Andrew P. Kahn, Robert G. Gastinger, Rangasamy Pitchai
Abstract: An improved process for producing allyl bromides by halogen exchange by reaction of an allyl chloride, with a metal bromide, wherein the reaction is conducted in an aprotic polar solvent. The allyl bromides obtained by the process of the invention are useful as intermediates for producing medicines, agricultural chemicals, dyes, and the like.