摘要:
Carbon dioxide is removed from a gaseous stream by contacting the stream with an adsorbent prepared by impregnating a porous aluminum with an alkali metal or alkaline earth metal oxide or salt decomposable upon calcination and subsequently calcining the impregnated alumina at about 350.degree. C.-700.degree. C.
摘要:
Acetone cyanohydrin is converted to alpha-hydroxyisobutyric acid by contacting the cyanohydrin with alpha-hydroxymethanesulfonic acid and water at a temperature of about 70.degree.-125.degree. C. The alpha-hydroxymethanesulfonic acid is an equilibrium product of the reaction of water, sulfur dioxide and formaldehyde.
摘要:
A process is disclosed for removing hydrogenation catalyst residues from hydrogenated conjugated diene polymers by contacting a hydrocarbon solution of said polymers with an aqueous dilute solution of an alpha-hydroxysulfonic acid, separating the aqueous phase from the hydrocarbon phase, removing the hydrocarbon solvent from the hydrocarbon phase, producing a solid polymer, and applying heat and/or vacuum to the solid polymer to remove the residual alpha-hydroxysulfonic acid.
摘要:
Process for removing catalyst residues from atactic polypropylene is disclosed which comprises contacting the polypropylene with an aqueous solution of an alpha-hydroxysulfonic acid and then separating the polypropylene-containing phase from the aqueous phase.
摘要:
A process is disclosed for hydrating olefins to alcohols using a very active catalyst comprising an alpha-hydroxysulfonic acid prepared by reacting a carbonyl compound with sulfur dioxide and water.
摘要:
An extremely mild, oxidative process for converting alkoxyalkanols to the corresponding acids is disclosed which comprises reacting the alcohol with an alkali metal hydroxide and tert-butyl hydroperoxide in the presence of a catalytic amount of palladium.
摘要:
A process for removing catalyst residues from poly-1-butene which is disclosed which comprises contacting an organic phase containing the poly-1-butene dissolved in an inert hydrocarbon solvent with an aqueous solution of an alpha-hydroxysulfonic acid and then separating the poly-1-butene-containing phase from the aqueous phase.
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.