摘要:
A method for the production of dialkyl carbonates of formula (I), in which R?1 and R2¿ independently = linear or branched hydrocarbon groups with 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, by transesterification of C¿1?-C4 dialkyl carbonates with C6-C22 alcohols, in which (a) the crude transesterified mixture undergoes a first rectification in which the low-boiling impurities are distilled off, (b) the bottom product obtained thus undergoes a second rectification to separate off the high-boiling impurities and (c) the mid-boiling impurities are removed from the distillate obtained as above in a deodorising column, using steam or inert gases.
摘要:
The invention relates to a method for producing Guerbet alcohols of formula (I), CH3(CH2)nCHR1CH2OH, wherein R1 represents a linear alkyl radical having n-1 carbon atoms, and n represents 3 to 9 carbon atoms. Fatty alcohols of formula (II), R2OH, wherein R2 represents linear alkyl radicals having 6 to 12 carbon atoms, are condensed in the presence of carbonyl compounds and alkali hydroxides.
摘要:
The invention relates to a method for producing a benzoate by reacting a benzoic acid constituent, selected from a benzoic acid and a benzoic acid ester, with alcohol in the presence of a catalyst. Tin (II) oxide, which is combined with a phosphorous (I) compound, in particular phosphoric (I) acid or a salt thereof, is used as the catalyst. The method is particularly suitable for the esterification of benzoic acid with fatty alcohols or hydroxy-fatty alcohols. The resultant products can be used as constituents in cosmetic preparations.
摘要:
The invention relates to a method for producing branched alcohols and/or hydrocarbons, whereby carbonyl compounds are condensed in the presence of acids or bases and the resulting alpha , beta -unsaturated condensation products are then hydrogenated.