摘要:
The invention relates to a process for the preparation of N,N-bis-(2-hydroxyalkyl)-aminomethane phosphonic acid dimethyl esters corresponding to the following general formula: ##STR1## wherein each R, may be the same or different and represents hydrogen or, preferably, a lower, linear or branched alkyl radical or halogen-substituted alkyl radical containing from 1 to 6 carbon atoms.
摘要:
A process for the production of N,N-bis-(2-hydroxyalkyl)-aminomethane phosphonic acid dialkyl esters of the formula ##STR1## in which R is an optionally substituted alkyl radical with 2 to 10 carbon atoms, andR' is hydrogen or a lower alkyl radical with up to 6 carbon atoms,Comprising reacting an oxazolidine of the formula ##STR2## with a dialkyl phosphite in the presence of an acid ion exchanger. Preferably R is ethyl or isopropyl, R' is hydrogen or methyl, the ion exchanger is a sulfonated polystyrene resin and the reaction is effected at about 30.degree. to 120.degree. C, especially 60.degree. to 100.degree. C. The products are thereby obtained rapidly in higher purity than heretofore possible.
摘要:
In the production of a foamed synthetic material by the reaction of starting materials which undergo a polymerization, polycondensation or polyaddition reaction to produce a high molecular weight synthetic material in the presence of a blowing agent, e.g. a polyurethane, or by foaming an unfoamed thermoplastic synthetic material by means of a blowing agent, the improvement which comprises employing 1,1,1-trifluoro-2-chloroethane as the blowing agent, optionally in admixture with 1,1-difluoro-2-chloroethane.
摘要:
A process for the preparation of brominated aryl dichlorophosphates or diaryl chlorophosphates of the formula: ##STR1## WHEREIN R each independently is hydrogen, an alkoxy radical or alkyl radical containing 1 to 10 C-atoms, a perfluoroalkyl radical containing 1 to 10 C-atoms, halogen, the group --NO.sub.2, --SO.sub.3 H, Cl.sub.2 P(O)O-- or Cl.sub.2 P(O)OC.sub.6 H.sub.4 - CR'.sub.2 --,R.sup.1 each independently is hydrogen or an alkyl radical containing 1 to 4 C-atoms,X is an integer from 1 to 4,N is 1 or 2, andM is from 0.1 to 2,Comprising reacting the corresponding aryl dichlorophosphates or diaryl chlorophosphates, with a substantially equimolar mixture of bromine and chlorine at a temperature between about -10.degree. and 100.degree. C. Advantageously the bromine and chlorine are present as bromine chloride, the reaction is carried out at about 10.degree. to 60.degree. C. and the proportions, time and temperature of reaction are such that the degree of bromination is about 0.1 to 0.8 mol of bromine per phenyl nucleus.
摘要:
Employing as surface active agents salts of perfluoroalkane sulphonamides, preferably of the formula ##STR1## in which R.sub.F is a perfluorinated aliphatic group having 4 to 20 C-atoms,R is a hydrogen atoms, an alkyl group having 1 to 4 C-atoms, a hydroxyalkyl group having 1 to 4 C-atoms or a cycloalkyl group having up to 6 C-atoms, andM is an alkali metal, an alkaline earth metal or an onium group of the formula[ZR.sub.2 R.sub.3 R.sub.4 R.sub.5 ].sup..sym., Z is phosphorus or nitrogen, andR.sub.2 to R.sub.5 each independently is a hydrogen atom, or an alkyl, hydroxyalkyl, or alkoxyalkyl group having 1 to 4 C-atoms per alkyl moiety.
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:
1,1-Difluoro-2-chloroethylene is used as the propellant in an aerosol spray can. It is reasonably stable and non-flammable but will in time degrade in the atmosphere.
摘要:
A process for the preparation of a hydroxyalkylperfluoroalkane sulphonamide of the formula ##STR1## wherein R.sub.F is a perfluoroalkyl group having from 1 to 20 carbon atoms;R and R' each independently is hydrogen or an alkyl, hydroxyalkyl, haloalkyl, cycloalkyl, aralkyl, alkenyl or aryl radical; andm and n each independently is an integer from 1 to about 30,comprising reacting a perfluoroalkylsulphonamide of the formula ##STR2## with an epoxide of the formula ##STR3## in the presence of a basic catalyst.
摘要:
Production of tetraethyl ammonium perfluoroalkyl sulphonates (C.sub.2 H.sub.5).sub.4 N.sym.R.sub.F SO.sub.3 .crclbar., wherein R.sub.F represents a perfluorinated alkyl radical with about 4 to 10 carbon atoms, by reacting crude perfluoroalkyl sulphonic acid fluoride, i.e. perfluoroalkyl sulphonic acid fluoride which has not been especially purified, with triethylamine and an ethoxy silane, preferably dimethyl diethoxy silane, methyl triethoxy silane or tetraethoxy silane in an inert solvent at temperatures of about 10.degree. to 60.degree. C., preferably about 20.degree. to 40.degree. C. The process according to the invention is particularly suitable for the production of tetraethyl ammonium perfluorooctane sulphonate.
摘要翻译:制备全氟烷基磺酸四乙基铵(C 2 H 5)4 N(+)RFSO 3( - ),其中RF表示具有约4至10个碳原子的全氟烷基,通过使全氟烷基磺酸氟化物即即未全氟烷基磺酸氟化物 特别是用三乙胺和乙氧基硅烷,优选二甲基二乙氧基硅烷,甲基三乙氧基硅烷或四乙氧基硅烷在惰性溶剂中,在约10℃至60℃,优选约20℃至40℃的温度下纯化。根据 本发明特别适用于生产全氟辛烷磺酸四乙基铵。
摘要:
The present invention relates to a process for the preparation of symmetrically substituted phosphoric acid diesters of long-chain linear or branched alcohols of chain length C.sub.4 to C.sub.22.