摘要:
A process for the preparation of bromoalkyl esters and vicinal glycol esters which comprises thermally decomposing at temperatures of from 100.degree. C. to 200.degree. C. a bis(2-bromoalkyl)tellurium dicarboxylate compound of the formula ##STR1## wherein at least one R is hydrogen or R is a methyl group and R' is hydrogen or an alkyl group having 1 to 3 carbon atoms in the presence of an aliphatic monocarboxylic acid selected from formic, acetic, propionic or butyric acid employed as solvent and to facilitate solvolysis in the reaction to give in addition to the bromoalkyl ester, the vicinal glycol ester. An inert acetonitrile solvent may be employed alone to give predominately the bromoalkyl ester or an admixture with the acid may be employed. Oxygen is preferably employed with the carboxylic acid solvent to provide an increase in the mole ratio of vicinal glycol ester to the bromoalkyl ester produced.
摘要:
A process for the preparation of a cyclic alkylene carbonate ester which comprises reacting in a liquid phase a cyclic or linear olefin having from 2 to 15 carbon atoms with carbon dioxide at a temperature of from 30.degree. to 160.degree. C., at a total pressure of from 100 to about 2,000 psig and a pH value of between about 4 and 8, in the presence of oxygen or an oxygen-containing gas and a catalytic amount of a mixture of (a) iodine or an iodide of a metal selected from Groups IA, IB, IIA, IIB, VB, VIIB and VIII of the Periodic Table of Elements, (b) a carbonate of a metal selected from Groups IB, IIA, IIB and VIII of the Periodic Table of Elements, (c) a catalytic iron compound and (d) a catalytic soluble cupric salt, and recovering resulting cyclic alkylene carbonate ester.
摘要:
A process for the preparation of alkylene carbonates having from 3 to 31 carbon atoms per molecule of the general formula ##STR1## which comprises reacting in the liquid phase the corresponding alkylene iodohydrin having from 2 to 30 carbon atoms per molecule with carbon dioxide in the presence of oxygen or an oxygen-containing gas and an effective amount of a catalytic mixture of(1) an iodide of the metals selected from groups IA, IB, IIA, IIB and VIII of the Periodic Table of Elements and(2) a carbonate of the metals selected from the groups IB, IIA, and IIB of the Periodic Table of Elements,at a temperature of from 30.degree. C. to 120.degree. C., and at a total carbon dioxide and oxygen pressure between about atmospheric and 1400 psig, at a pH value of between 3 and 10.
摘要:
Phenyl acetic acid is prepared by the reaction of molecular oxygen and the combination of acetic acid and benzene in the presence of a catalytic system featuring both tellurium and halide, the unit atomic ratio of halide to tellurium being within a range from about 3 to about 20, at a temperature within a range from about 100.degree. C. to about 200.degree. C. at a pressure within a range from about 1 to about 15 atmospheres.
摘要:
A process for the preparation of acrylic acid or methacrylic acid by the ruthenium and/or osmium catalyzed conversion of peroxide (peroxy) intermediate compounds, derived from the autoxidation of acrolein or methacrolein, to the corresponding .alpha.,.beta.-unsaturated carboxylic acid, particularly the conversion of permethacrylic acid and methacrolein monopermethacrylate to methacrylic acid.
摘要:
A process for the preparation of 2-bromoalkyl esters and vicinal glycol esters which comprises thermally decomposing at temperatures of from 100.degree. C. to 200.degree. C. an organic bromoalkyl tellurium compound selected from 2-bromoalkyltellurium tribromide or bis(2-bromoalkyl)tellurium dibromide, wherein the alkyl group is ethyl, propyl or butyl, in a carboxylic acid having from 1 to 4 carbon atoms which is employed as solvent as well as to supply the ester moiety to the esters produced. The esters may be converted to the respective glycol with water or an aqueous base.
摘要:
A process for the preparation of a cyclic alkylene carbonate ester which comprises reacting in a liquid phase a cyclic or linear olefin having from 2 to 15 carbon atoms with carbon dioxide at a temperature of from 50 to 160.degree. C., at a total pressure of from 200 to about 2,000 psig and a pH value of between about 4 and 8, in the presence of oxygen or an oxygen-containing gas and a catalytic amount of a mixture of (a) iodine or an iodide of a metal selected from Groups IA, IB, IIA, IIB, VB, VIIB and VIII of the Periodic Table of Elements and (b) a catalytic iron compound, copper compound of mixture thereof deposited on an inert supporting material, and recovering resulting cyclic alkylene carbonate ester.
摘要:
Process for the liquid phase oxidation of an unsaturated lower aliphatic aldehyde to the corresponding carboxylic acid wherein the oxidation is carried out by passage of an oxygen-containing gas through a liquid medium containing the unsaturated aldehyde and a fluorine-containing organic compound.
摘要:
A low viscosity synthetic lubricant is prepared by polymerizing 1-butene to an oligomer containing a number average of about 8 to 18 carbon atoms and copolymerizing the oligomer with an alpha-monoolefin having 8 to 18 carbon atoms to produce a copolymer having an average of about 20 to 40 carbon atoms. Both polymerization reactions are catalyzed by a combination of boron trifluoride and a proton donor promoter. The synthetic lubricant is preferably stripped to remove lower boiling components, such as oligomers having 20 carbon atoms or less, and optionally hydrogenated for improved stability.
摘要:
Method for the molybdenum-catalyzed epoxidation of less reactive olefins such as the alpha-olefins and alpha-substituted olefins with the less stable organic hydroperoxides to give good yields of the epoxide by employing a critical amount of a stabilizing agent consisting of a C.sub.3 to C.sub.9 secondary or tertiary monohydric alcohol.