摘要:
Transition metal complexes of meso-haloalkylporphyrins, wherein the haloalkyl groups contain 2 to 8 carbon atoms have been found to be highly effective catalysts for oxidation of alkanes and for the decomposition of hydroperoxides.
摘要:
Acetone produced during MTBE production and containing methanol, aldehydes and other organic impurities is contacted with a solution of basic material such as NaOH in lower glycol at conditions effective to polymerize aldehyde impurities, the polymerized impurities are separated, and acetone is separated from methanol in an extractive distillation using the same lower glycol as extractive distillation agent.
摘要:
The glycerol water (sweet water) accumulating in the high-pressure hydrolysis of natural fats and oils with steam into fatty acid and glycerol is continuously purified. Fats larger than 100 .mu.m in diameter are separated from the aqueous phase in a plate-type phase separator and are returned to the high-pressure hydrolysis process. The aqueous phase thus prepurified is passed through a cross-flow filtration membrane, more particularly a microfiltration membrane, and the concentrate is returned to the entrance of the plate-phase separator. Large product streams of glycerol water can be purified continuously, effectively and particularly economically despite frequent changes of provenance.
摘要:
A process is provided in which an alcohol having X carbon atoms is reacted over an L-type zeolite catalyst to produce a higher molecular weight alcohol. In some embodiments, a first alcohol having X carbon atoms is condensed with a second alcohol having Y carbon atoms to produce a branched-chain alcohol having X+Y carbon atoms. Processes for making ethers useful as fuel oxygenates which incorporate the foregoing process steps also are disclosed.
摘要:
A method and apparatus for conducting a catalytic distillation process is provided which allows for maintaining a liquid level in selected portions of the catalyst bed. Three particular processes disclosed are the production of methyl tertiary butyl ether, tertiary butyl alcohol and cumene.
摘要:
The invention relates to a new compound of the formular (1): ##STR1## wherein m.sub.1 =0, 1 or 2, m.sub.2 =0, 1 or 2, m.sub.1 and m.sub.2 are not to be simultaneously 0 or simultaneously 2; n.sub.1 =2-m.sub.1, n.sub.2 =2-m.sub.2 ; R=either H or alkyl with 1 to 8 carbon atoms, R'=alkyl with 1 through 18 carbon atoms, and X=H or OH.The invention also relates to the preparation thereof, the compositions containing them and the application in catalysis of oxidation of hydrocarbons, particularly in catalysis of oxidation of cyclohexane.
摘要:
According to the invention, yeast cells are immobilized on a substantially noncompressible carrier having anion exchange properties. The immobilized yeast can then be used to ferment a sugar-containing substrate. The noncompressibility enables the system to be sterilized and to operate under pressure. A preferred example of the carrier is granular DEAE cellulose.
摘要:
Tertiary butyl alcohol is prepared by the catalytic decomposition of tertiary butyl hydroperoxide in solution in a monocyclic aromatic solvent in the presence of a metal phthalocycnaine catalyst.
摘要:
Unsaturated alcohols are prepared by hydrogenation of the corresponding carbonyl compounds in the presence of a platinum-cobalt bi-metallic catalyst having an alloy structure.
摘要:
Hexafluoroacetone or its hydrate is produced in a higher yield than that of the conventional process (1) by oxidizing a heptafluoroisobutenyl ether with ozone or (2) by thermally decomposing an octafluoroisobutyl ether or a heptafluoroisobutenyl ether in the presence of oxygen and an activated carbon catalyst.