摘要:
A process for the integral production and reactive consumption of hydrogen peroxide combines oxidation of a high-boiling secondary alcohol to form hydrogen peroxide and the ketone analog, recycle of a hydrogenated ketone/alcohol stream to the oxidation step, and epoxidation of unsaturated fatty acid esters utilizing a gaseous hydrogen peroxide stream as it is produced. The epoxidized esters are known to have desirable characteristics for use as plasticizers and similar products.
摘要:
Process for producing an oxirane compound includes treating with hydrogen peroxide in the presence of either an olefin oxidation catalyst prepared from an organic compound or a polymer compound of formula (1) a tungstic acid compound, a phosphoric acid, hydrogen peroxide and a quaternary ammonium salt of formula (2) or (3) or an olefin oxidation catalyst prepared from an organic compound or a polymer compound of formula (1), a tungsten compound and a quaternary ammonium salt of formula (2) or (3). The process is useful especially industrially.
摘要:
Titanium or vanadium zeolite catalysts are prepared by reacting a titanium or vanadium compound, a silicon source, a templating agent, and a hydrophobic hydrocarbon liquid polymer. The catalyst is useful in olefin epoxidation with hydrogen peroxide.
摘要:
An object of the present invention is to provide a method for producing an epoxy compound more efficiently from olefin, oxygen, and hydrogen. A method according to the present invention for producing an epoxy compound is a method for producing an epoxy compound from olefin, oxygen, and hydrogen. The method includes: (a) bringing a crystalline titanosilicate catalyst having an MFI structure into contact with a peroxide; and (b) reacting olefin, oxygen, and hydrogen with each other in a liquid phase in the presence of a noble metal catalyst and the crystalline titanosilicate catalyst obtained in the step (a).
摘要:
The present invention relates to a catalyst based on ruthenium complexes and to a process for the asymmetric epoxidation of olefins using catalysts based on ruthenium complexes.
摘要:
Silicon-titanium mixed oxide powder, dispersion thereof and titanium-containing zeolite prepared therefrom Pyrogenic silicon-titanium mixed oxide powder, having a BET surface area of 200 to 400 m2/g, a silicon dioxide content of 97.0±1.5% by weight, a titanium dioxide content of 3.5±1.0% by weight, the sum of silicon dioxide content and titanium dioxide content being greater than 99.7% by weight.Dispersion comprising this powder.Process for the preparation of a titanium-containing zeolite starting from powder or dispersion.
摘要:
A process comprising reacting hydrogen and oxygen in the presence of a noble metal, a thiol or thiolate, and a solvent is disclosed. The thiol or thiolate improves the hydrogen peroxide yield. The produced hydrogen peroxide may be used to oxidize organic compounds in the presence of an oxidation catalyst.
摘要:
The invention is a catalyst comprising a titanium or vanadium zeolite, a binder, and zinc oxide, wherein the catalyst is preparing an aqueous mixture of the zeolite, a binder source, and a zinc oxide source, and subjecting the mixture to rapid drying. The catalyst is useful in olefin epoxidation.
摘要:
Process for the continuous recirculation of the olefin which has not been reacted in the epoxidation of olefins by means of hydroperoxide to give oxiranes and is present in the offgas stream formed during the epoxidation, which comprises the steps (i) to (iii) (i) compressing and cooling the offgas stream, (ii) seperating the olefin from the offgas stream obtain in step (i) by distillation, (iii) epoxidizing the olefin seperating off in step (ii) by means of hydroperoxide.
摘要:
A plant for producing hydrogen peroxide and using the hydrogen peroxide so made for manufacturing an oxirane by reaction between an olefin and said hydrogen peroxide, wherein the hydrogen peroxide is manufactured by an alkylanthrahydroquinone (AO) process in which an aqueous hydrogen peroxide solution is obtained by extraction, with substantially pure water, of a mixture derived from the oxidation of at least one alkylanthrahydroquinone, without a subsequent washing, purification treatment or combination thereof.