摘要:
Phenyl ethyl alcohol that is contaminated with phenolic impurities is purified by converting the phenolic impurities to metal phenolate and then distilling purified phenyl ethyl alcohol under reduced pressure.
摘要:
A toilet rinse block is free of para-dichlorobenzene and includes a fragrance alcohol in the form of a metal complex (e.g., citronellol aluminate) that releases the fragrance upon rinsing with water.
摘要:
This invention relates to a process for enzymic oxidation of a fatty acid to produce an oxidation product in the presence of water and oxygen characterised in that the fatty acid, water and enzyme for the oxidation are substantially uniformly distributed throughout a porous bed of solid support material in the substantial absence of a continous liquid phase, oxygen is passed through the porous bed and the oxidation product is recovered from the porous bed. The invention is of particular value for production of methyl ketones from saturated fatty acids. Apparatus for carrying out the process is also novel and comprises a sealable vessel (1) that can contain a porous bed 4 of solid support material, a gas inlet (12) for supplying oxygenating gas to the reactor, a gas outlet (13), passage means (7) defining a plurality of upwardly extending passages that can open along their length into the bed and that communicate with the inlet (12) and that are preferably spaced 5 to 20cm (preferably 5 to 15cm) apart, and means for forcing oxygenating gas through the inlet and along and out from the passages and into the bed.
摘要:
A liquid composition, suitable for use in an air freshener, comprising a vessel for the composition, an emanating surface and a wick for supplying the liquid to the emanating surface, contains 20 to 70 % water, 8 to 30 % perfume and diethylene glycol monobutyl ether and is substantially free of surface active agent. The compositions show an improved, steady rate of emanation of the perfume.
摘要:
n indane, tetralin or phenyl alcohol is made by a heterogeneous, fast, exothermic Friedel Craft reaction and the reaction mixture is cooled to a temperature at which substantial by-product formation is avoided by continuously utilising the heat of reaction to boil solvent from the reaction mixture. The reaction mixture is generally maintained below atmospheric pressure, typically 20 to 100 mm Hg. The process is of particular value for the production of aryl alcohols by reacting an indane or tetralin with ethylene oxide or propylene oxide.
摘要:
Process for the preparation of indanes with the formula wherein R 3 represents a hydrogen atom or a methyl group; at least one of R, and R 2 represents a methyl group and the other represents a hydrogen atom or a methyl group and R 4 and R 5 which may be the same or different represent alkyl groups having form 1 to 3 carbon atoms in which alkenes selected from the group consisting of propylene, 2-methyl- but-1-ene, 2-methyl-but-2-ene, 2-methyl-pent-l-ene, 2-methyl-pent-2-ene, 3-methyl-but-1-ene, isobutylene and diisobutylene, are reacted with a styrene with the formula wherein R 1 represents a hydrogen atom or a methyl group; in the presence of phosphoric acid. The indanes (or their precursors) can be reacted with an alkylen oxide and subsequently with formaldehyde to yield isochromanes.
摘要:
The invention relates to a process for the production of 3 (alkyl phenyl) propanals; certain of which are known to be valuable in the perfumery industry. The process enables this group of chemicals to be produced more easily as compared to known processes for their production. In a preferred embodiment in one step of the process the alkylation of the 3 phenyl propanol is carried out under controlled conditions so as to favour the production of para isomer of the product.
摘要:
Organic hydroxy compounds such as geraniol are prepared by electrochemical reduction of a corresponding substituted hydroxylamine, typically in a cell wherein the catholyte comprises a solvent and protonating agent as well as the substituted hydroxylamine and is separated from the anolyte by a membrane, the anolyte preferably containing an aqueous strong mineral acid.