摘要:
The invention relates to catalytic fluorination of perchloroethylene or of pentachloroethane in the gas phase by means of hydrofluoric acid.A mixed catalyst is employed, made up of nickel and chromium oxides, halides and/or oxyhalides deposited on a support consisting of aluminium fluoride or of a mixture of aluminium fluoride and alumina.
摘要:
A method for producing p-dichlorobenzene using a reactor containing a catalyst/reagent to convert chlorobenzene (or benzene) to p-dichlorobenzene, the reactor having an inlet and an outlet for introducing reactants and removing product; introducing a pulse of gaseous chlorobenzene (or benzene) into the reactor and reacting the chlorobenzene with the catalyst/reagent whereby p-dichlorobenzene is formed; introducing a pulse of inert gas into the reactor; introducing a pulse of gaseous chlorine into the reactor and reacting the chlorine with the catalyst/reagent; introducing a pulse of inert gas into the reactor; repeating the pulsing steps in a sequential manner, whereby mixing of the vaporized benzene or chlorobenzene, and the chlorine gas is prevented; and continuously removing product containing p-dichlorobenzene from the outlet of the reactor.
摘要:
A catalyst/cocatalyst composition of matter is useful in oxidizing organic waste material to produce hydrogen. Use of the catalyst/cocatalyst composition causes the reaction rate to increase and causes the energy required for the reaction to decrease. A solution, including the catalyst/cocatalyst composition, and a reaction medium composition further including organic waste material are also described.
摘要:
A process for producing fiber grade terephthalic acid by subjecting p-xylene to a liquid phase oxidation with oxygen or an oxygen-containing gas in the presence of an oxidation catalyst comprising cobalt, manganese and bromine and in the presence of a lower aliphatic carboxylic acid solvent, said catalyst comprising: (a) the amount of cobalt is in the range of 0.05 0.50 percent by weight based on the solvent, (b) the amount of the manganese is in the range of 1 - 20 percent by weight based on cobalt, (c) the source of bromine is cobalt bromide, free bromine, or a mixture thereof, and (d) the weight ratio of bromine to cobalt is in the range of 1.5:1 - 6.0: 1. Terephthalic acid thus obtained can be used as a raw material of direct polymerization with glycols for providing high quality polyester.
摘要:
The invention relates to a silicon-based anode material for a lithium-ion battery, a preparation method therefor, and a battery. The silicon-based negative electrode material is prepared by the compounding of 90 wt %-99.9 wt % of a silicon-based material and 0.1 wt %-10 wt % of carbon nanotubes and/or carbon nanofibers which grow on the surface of the silicon-based material in situ.
摘要:
A catalyst and a process for using the catalyst are presented. The catalyst is a heterogeneous catalyst and includes active metal halides bonded to functional groups. The functional groups are bonded to a polymeric backbone to form the structure supporting the catalyst. The catalyst is useful for the dimerization of acetylene to convert the acetylene to a larger hydrocarbon, and in particular to dimerize acetylene to vinylacetylene.
摘要:
A process for preparing phosphoramidates of nucleosides where a desired enantiomer, having regard to the asymmetric chiral center of the phosphorus atom P, is provided in an enriched amount. The process comprises admixing a nucleoside with a phosphorochloridate in the presence of a catalyst comprising a metal salt selected from the group consisting of salts of Cu, Fe, La and Yb.
摘要:
A rubber composition comprising a plurality of composite particles and an elastomer is provided. A composite comprising a conductive polymer and a clay particle are also provided. Use of each in various applications and methods of preparing each are also provided.
摘要:
Disclosed is an oxidation process to produce a crude carboxylic acid product carboxylic acid product. The process comprises oxidizing a feed stream comprising at least one oxidizable compound to generate a crude carboxylic acid slurry comprising furan-2,5-dicarboxylic acid (FDCA) and compositions thereof. Also disclosed is a process to produce a dry purified carboxylic acid product by utilizing various purification methods on the crude carboxylic acid.