摘要:
This invention relates to a process for the alkylation of methylbenzene to produce ethylbenzene and styrene. In this process methylbenzene and methanol are contacted with a catalyst formed from a zeolite and an alkali(ne earth) metal compound wherein said compound is selected from alkaline earth metal compound and a mixture of alkaline earth metal compound and alkali metal compound and wherein the sum of the amount of the alkali(ne earth) metal in the compound plus any metal cation exchanged into the zeolite is in excess of that required to provide a fully metal cation-exchanged zeolite.
摘要:
This invention relates to basic compositions comprising a zeolite and an alkali metal compound wherein the sum of the amount of the alkali metal in the compound plus any metal cation exchanged into the zeolite is in excess of that required to provide a fully metal cation-exchanged zeolite. This invention further relates to methods for preparing the instant compositions. In a preferred embodiment the instant compositions are prepared by impregnating a zeolite with a solution of an alkali metal salt wherein said alkali metal impregnated in the zeolite is in excess of that required to exchange out the ion exchangable sites present in the zeolite, drying the resultant impregnated material and then calcining the resultant composition.
摘要:
This invention relates to a composition comprising a zeolite and a zinc or a zinc plus an alkali metal and/or an alkaline earth metal compound wherein the sum of the amount of the zinc or zinc plus alkali metal and/or alkaline earth metal in the compound plus any metal cation exchanged into the zeolite is in excess of that required to provide a fully metal cation-exchanged zeolite. The catalyst is preferably activated before use as a catalyst by heating to 400.degree. C. to 650.degree. C., typically in a nitrogen or air atmosphere.
摘要:
1,3-Propanediol is prepared in a process which involves reacting ethylene oxide with carbon monoxide and hydrogen in an essentially non-water-miscible solvent in the presence of a non-phosphine-ligated cobalt catalyst and a lipophilic dihydroxyarene promoter to produce an intermediate product mixture containing 3-hydroxypropanal in an amount less than 15 wt %; extracting the 3-hydroxypropanal from the intermediate product mixture into an aqueous liquid at a temperature less than about 100.degree. C. and separating the aqueous phase containing 3-hydroxypropanal from the organic phase containing cobalt catalyst; hydrogenating the 3-hydroxypropanal in the aqueous phase to 1,3-propanediol; and recovering the 1,3-propanediol.The process enables the production of 1,3-propanediol in high yields and selectivity without the use of a phosphine ligand-modified cobalt catalyst.
摘要:
This invention relates to a process for making 3-hydroxyaldehydes having 4 or more carbon atoms by intimately contacting(a) 1,2-epoxides having 3 or more carbon numbers,(b) ditertiary phosphine-modified cobalt carbonyl catalyst, said phosphine being a hydrocarbylene-bis(monophosphabicyclononane) in which each phosphorus atom is joined to hydrocarbylene and is a member of a bridge linkage without being a bridgehead atom and which hydrocarbylene-bis(monophosphabicyclononane) has 11 to 80 carbon atoms, 5 to 12 carbon atoms thereof together with a phosphorus atom being members of each of the two bicyclic skeletal structures,(c) carbon monoxide, and(d) hydrogen, the molar ratio of carbon monoxide to hydrogen being from about 4:1 to about 1:6, in liquid-phase solution in an inert reaction solvent, at a temperature of from about 30.degree. C. to about 150.degree. C. and a pressure of from about 50 psi to about 10,000 psi. Acids and promoter salts may be added to the reaction mixture to promote the hydroformylation reaction.
摘要:
A stabilized polymer composition comprising a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon, and a melt stabilizer comprising a mixture of magnesium oxide and alumina. A process of preparing the composition and articles of manufacture made of the composition are also disclosed.
摘要:
A hydrogenation catalyst prepared by combining a Group VIIIA metal compound and an alkylalumoxane and a hydrogenation process wherein said catalyst is used to hydrogenate compounds or materials containing ethylenic and/or aromatic unsaturation. The Group VIIIA metal compound is selected from the group of compounds consisting of carboxylates, chelates, alkoxides, salts of acids containing sulfur, salts of partial half esters of acids containing sulfur and salts of aliphatic and aromatic sulfonic acids. Nickel and cobalt compounds are preferred for use in preparing the hydrogenation catalyst. Hydrogenation catalysts prepared with methylalumoxane initially exhibit less hydrogenation activity than catalysts known heretofore in the prior art and prepared with a metal alkyl of a metal selected from Groups I, II and III. These catalysts, then, permit or enable greater control over the extent of hydrogenation, particularly when partial hydrogenation is a desired end result. Ultimately, however, the catalyst permits substantially complete hydrogenation of both ethylenic and aromatic unsaturation. Hydrogenation catalysts prepared with higher alkyl (C.sub.2 -C.sub.8) alumoxanes on the other hand are generally more active at all hydrogenation times at least those greater than about 30 minutes.
摘要:
This invention relates to a process for producing 1-octenes comprising reacting conjugated dienes and carboxylic acids in the presence of palladium, platinum or ruthenium catalysts to produce 2,7-alkadienyl esters, contacting the 2,7-alkadienyl esters with hydrogen to produce alkyl esters and subsequently pyrolyzing the alkyl esters to produce 1-octene and carboxylic acid.
摘要:
Stabilized polymer compositions comprise a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon incorporating a stabilizing quantity of a zinc aluminate and, optionally, an acidic polymer containing moieties of an .alpha.-olefin and an .alpha.,.beta.-ethylenically unsaturated carboxylic acid. The compositions demonstrate improved melt stability.
摘要:
This invention relates to a process for converting saturated aliphatic primary alcohols to aldehydes by passing said alcohols over a fixed bed of brass catalyst particles at a temperature ranging from about 375.degree. to about 550.degree. C. in the presence of hydrogen passing over the bed at a gaseous hourly space velocity of greater than about 250 hour.sup.-1 and recovering the product aldehyde from an effluent passing out of the fixed bed.