Abstract:
A process for producing an olefin oxide which comprises reacting an olefin with oxygen in the presence of a catalyst comprising a copper oxide and a tellurium oxide.
Abstract:
The invention is a process for epoxidizing an olefin with hydrogen and oxygen in a solvent comprising acetonitrile in the presence of an quinone-acid salt and a catalyst comprising a titanium zeolite and a noble metal. The process results in higher productivity and improved selectivity to propylene oxide from hydrogen and oxygen, as compared to processes that use only a quinone.
Abstract:
A process for making propylene oxide from propylene is disclosed. The process comprises reacting propylene, oxygen, and hydrogen in the presence of a catalyst and a solvent to produce a reaction mixture comprising propylene oxide. Separation of propylene, oxygen, hydrogen, and propylene oxide from the reaction mixture results in a residual mixture comprising methanol. A portion of the residual mixture is recycled to the reaction. A portion of the residual mixture is distilled to generate a distilled methanol stream, which is recycled to the reaction.
Abstract:
A process for making propylene oxide from propylene is disclosed. The process comprises reacting propylene, oxygen, and hydrogen in the presence of a catalyst, a solvent, and a buffer to produce a reaction mixture comprising propylene oxide. Separation of light components from the reaction mixture gives a heavy residue comprising the buffer. The buffer is precipitated from the heavy residue by a precipitating agent.
Abstract:
A catalyst comprising a transition metal zeolite and a noble metal supported on a titania-containing carrier is disclosed. The supported noble metal has a mean mass diameter of from 2 to 200 ?m. The catalyst is used in an epoxidation process comprising reacting an olefin, hydrogen, and oxygen. The supported noble metal is well dispersed in the reaction media.
Abstract:
There is disclosed a method for producing propylene oxide, which includes: reacting propylene, oxygen, and hydrogen in the presence of a noble metal catalyst and a titanosilicate catalyst in a liquid phase containing a polycyclic compound, which is unsubstituted or substituted with at least one substituent selected from Group B below, wherein the polycyclic compound is composed of two or more identical or different ring compounds selected from Group A below and the ring compounds are fused, directly bonded, or bonded by a linkage group selected from the group consisting of an oxygen atom, carbon chain, and a group composed of oxygen atom(s) and a carbon chain, provided that said polycyclic compound is not a polycyclic compound having hydroxy groups or oxo groups at para or. ortho positions. Group A consisting of benzene, cyclopentadiene, cycloheptatriene, furane, pyrane, cyclopentene, cyclopentane, cyclohexane, cyclohexene, cyclohexadiene, cycloheptane, cycloheptene, and cycloheptadiene. Group B consisting of halogen atom, alkyl group, alkenyl group, alkoxy group, hydroxyalkyl group, acyl group, oxo group, hydroxy group, and cyano group.
Abstract:
The invention provides processes for converting an unsaturated molecule to a polymer. In particular, the processing steps comprise bodying, epoxidation, hydrolysis, and oligomerization. These processes provide new processing paths for the formation of polyols for use in rigid foam and other applications.
Abstract:
A catalyst comprising a noble metal supported on a diatomaceous earth and a transition metal zeolite is disclosed. The catalyst is used in an epoxidation process comprising reacting an olefin, hydrogen, and oxygen. The diatomaceous earth is readily available and may be used in a slurry process without further particle size enlargement.
Abstract:
Described is a device and method for optimizing communications in a wireless network. The device comprises a first wireless transceiver communicating using a first channel of a first frequency band, a second wireless transceiver communicating using a second channel of a second frequency band, and a processor selecting one of the first and second transceivers for transmission of a wireless signal to a further device as a function of destination data of the further device. The further device includes a third transceiver communicating using one of the first and second frequency bands.
Abstract:
The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of a catalyst mixture containing a titanium or vanadium zeolite and a supported catalyst comprising palladium rhenium and a carrier. The process results in significantly reduced alkane byproduct formed by the hydrogenation of olefin.