摘要:
The invention describes a process for preparing alkoxylated, phosphorus-containing compounds, using heterogeneous catalysts based on metal oxides of aluminum, so that the product can be worked up anhydrously.
摘要:
The invention describes a process for preparing alkoxylated, phosphorus-containing compounds, using heterogeneous catalysts based on metal oxides of aluminum, so that the product can be worked up anhydrously.
摘要:
Process for preparing dimethyl propanephosphonate, characterized in that dimethyl phosphite is reacted with propene in the presence of a free-radical former at a reaction temperature of 60 to 95° C., the half life of the free-radical former being 0.1 to 20 min at the reaction temperature.
摘要:
Ester mixtures comprising a mixture of esterification products formed from polyether polyols, one or more aromatic monocarboxylic acids or aromatic monocarboxylic acid derivatives and one or more aliphatic monocarboxylic acids or aliphatic monocarboxylic acid derivatives, to a process for their preparation, and to their use as plasticizers for polymers.
摘要:
Specific azole compounds are outstandingly suitable for stabilizing iodine-containing biocides in industrial materials, more particularly in paints based on alkyd resin.
摘要:
The invention relates to a process for preparing triethyl phosphate by reacting phosphorus oxychloride with a greater than stoichiometric quantity of ethanol under reduced pressure at temperatures of from 0 to 50° C. in a reaction vessel, wherein a) the volatile components resulting from the reaction are predominantly condensed by means of a reflux condenser and the remaining volatile components are passed into a scrubber filled with water, b) after the end of the reaction, the reaction mixture is separated distillatively in an outgassing column into a top product and a bottom product which predominantly comprises triethyl phosphate, c) the top product of the outgassing column is combined with the contents of the scrubber and d) the contents of the scrubber are separated distillatively in an azeotropic distillation to obtain water and ethanol as top product and the ethanol, preferably after dewatering, is preferably returned to the reaction.
摘要:
Optically active oxiranes of the formula ##STR1## in which R represents substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl or represents substituted or unsubstituted phenyl, andR.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 represent hydrogen or alkyl, at least one of the radicals representing alkyl, orR.sup.4 and R.sup.5 together represent alkanediyl, which is unsubstituted or substituted by alkyl, or R.sup.4 and R.sup.5 together with the adjacent carbon atoms represent a fused bicyclic hydrocarbon radical, which is unsubstituted or substituted by alkylare produced by reacting an enantiomerically pure oxathiane ketone of the formula ##STR2## with a sulphonium or sulphoxonium salt. The product can be converted to optically active 2-hydroxyethylazole derivatives of the formula ##STR3##
摘要:
Use of compositions comprising a) at least one azole and b) at least one amidoalkylamine of the formula (I), a salt and/or acid addition compound thereof, in which R1 represents optionally substituted C1-C40-alkyl or C2-C40-alkenyl, R2, R3 and R4 independently of one another represent hydrogen or C1-C8-alkyl and n represents an integer from 1 to 6 for protecting industrial materials against attack and/or destruction by microorganisms.
摘要:
Finely divided solids are highly suitable for use as stabilizers for pyrocarbonic acid diesters, it being possible to use the mixtures obtained in this manner for preserving industrial materials and foodstuff.