摘要:
Method for concentrating an organic hydroperoxide mixture comprising a hydrocarbon and a hydroperoxide corresponding thereto comprises evaporating a first liquid mixture in a thin-film evaporation device followed by separation in a separation zone. Both the evaporation device and the separation zone operate at a low absolute pressure at a temperature lower than the thermal degradation temperature of the hydroperoxide to prevent thermal decomposition thereof. The process is particularly useful for concentrating an oxidation product made from the oxidation of cyclohexylbenzene.
摘要:
High-purity fluorinated peroxides are prepared in a simplified process in which carbonyl fluoride is reacted with a hypofluorite to produce a gaseous reaction product which is essentially free of unreacted hypofluorite; unreacted carbonyl fluoride and by productsare removed from the gaseous reaction product under gas phase conditions; and then the fluorinated peroxideis collected in gas phase.
摘要:
A process is disclosed for reducing the concentration of a dialkyl ether in a mixture comprising the dialkyl ether and a dialkyl peroxide wherein the process comprises treating said mixture with a strong acid.
摘要:
Process for preparing organic hydroperoxide having a reduced content of contaminants, which process comprises: (a) oxidation of an organic compound to obtain reaction product containing an organic hydroperoxide, (b) contacting at least part of the organic hydroperoxide containing reaction product with a basic aqueous solution, (c) separating the hydrocarbonaceous phase containing organic hydroperoxide from the aqueous phase, (d) washing at least part of the separated hydrocarbonaceous phase containing organic hydroperoxide, and (e) contacting at least part of the hydrocarbonaceous phase containing organic hydroperoxide with a guard bed comprising solid adsorbent having a void content of from 50% to 98% by volume.
摘要:
The reaction medium and distillate of a conventional continuous peracetic acid process can be combined into a stable peracetic acid product if the acid catalyst present in the reaction medium is neutralized.
摘要:
A process for preparing an equilibrium peroxy acid by the reaction of hydrogen peroxide with a carboxylic acid while removing the formed water in a reactive distillation device, the contents of the water and hydrogen peroxide in the acid being each 1.5 % by weight or less; and a process for producing a lactone by the reaction between the peroxy acid thus obtained and a cyclic ketone, which permits the selectivity of the lactone to be improved without lowering the activity of the ketone at an early stage of conversion.
摘要:
An improved process for decomposing alkyl or aromatic hydroperoxides to form a decomposition reaction mixture containing the corresponding alcohol and ketone is disclosed. The improvement relates to adding water to a starting hydroperoxide containing mixture, then removing the bulk of said water by a means such that water-soluble impurities are removed along with the water, then decomposing the hydroperoxide by contacting the hydroperoxide with a catalytic amount of a heterogeneous catalyst of Au, Ag, Cu or a sol-gel compound containing particular combinations of Cr, Co, Zr, Ta, Si, Mg, Nb, Al and Ti wherein certain of those metals have been combined with an oxide, such as an inorganic matrix of hydroxides or oxides, or combinations thereof. The catalysts may also optionally be supported on a suitable support member.
摘要:
Improved methods for the simultaneous production of dihydroxybenzene and dicarbinol from diisopropylbenzene are provided. These methods provide for continuous and simultaneous production of DHP and HHP using Karr Column extractors operated in series. A very purity DHP-containing solution, the precursor to the dihydroxybenzene, can be produced according to the reported methods. A safe and efficient method for producing dicarbinol from HHP is also disclosed.
摘要:
Peroxides are prepared from organic compounds and oxygen in a reaction vessel by introducing organic compound and oxygen to the reaction vessel and by simultaneously withdrawing a first liquid product stream from adjacent the top of the reactor and a second liquid product stream from adjacent the bottom of the reaction vessel. Suitable organic compounds include, but are not limited to, alkanes and alkyl aryl compounds.