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    • 2. 发明授权
    • Method for producing (meth) acrylic acid esters
    • (甲基)丙烯酸酯的制造方法
    • US06320070B1
    • 2001-11-20
    • US09308251
    • 1999-05-25
    • Heinrich AichingerMichael FriedGerhard Nestler
    • Heinrich AichingerMichael FriedGerhard Nestler
    • C07C6952
    • C07C67/08C07C69/54
    • (Meth)acrylic esters are prepared by reacting (meth)acrylic acid with a C4-C12-alkanol in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, wherein a) the reaction is carried out in an esterification unit which comprises a first reactor and at least one further reactor, b) a mixture of (meth)acrylic acid, C4-C12-alkanol and catalyst which contains not more than 5% by weight of water, based on the sum of the starting materials, is introduced into the first reactor, c) the esterification in the first reactor is conducted without removing ester, alkanol or water to a (meth)acrylic acid conversion of at least 40%, but only so far that the mixture remains a single phase, and d) the esterification is continued in at least one further reactor with the water formed being removed by distillation.
    • (甲基)丙烯酸酯通过使(甲基)丙烯酸与C 4 -C 12烷醇在硫酸或作为催化剂的一种C 1 -C 12烷基硫酸盐存在下反应制备,其中a)反应在酯化反应中进行 单元,其包含第一反应器和至少一个另外的反应器,b)(m)丙烯酸,C 4 -C 12烷醇和催化剂的混合物,其含有不超过5重量%的水,基于起始 材料被引入到第一反应器中,c)在不将酯,链烷醇或水除去至少40%的(甲基)丙烯酸转化率的情况下,在第一反应器中进行酯化,但是仅仅到混合物保​​持单一 相和d)在至少一个另外的反应器中继续酯化,形成的水通过蒸馏除去。