Novel polyfunctional compounds and a novel process for their preparation are disclosed. These compounds may be converted into the acid or salt forms of cis and trans aconitic acids as well as into a racemic mixture of isocitric acid, alloisocitric acid and the lactones of isocitric acid and alloisocitric acid and their salts. All of the acid and salt forms produced are useful as metal sequestrants and/or detergent builders. The novel polyfunctional compounds can also be saponified to their corresponding alkali metal salts which, in turn, are also metal ion seqestering agents and detergent builders. The polyfunctional compounds are the reaction products obtained from the reaction of selected salts of monoalkyl esters of maleic acid with selected active hydrogen containing compounds.
本发明揭示了一种新型多功能化合物及其制备方法。这些化合物可以转化为顺式和反式顺
乙烯酸以及
异柠檬酸、
异柠檬酸、
柠檬酸内酯及其盐的混合物。所产生的所有酸和盐形式都可用作
金属
螯合剂和/或洗涤剂添加剂。这些新型多功能化合物也可以皂化成相应的碱
金属盐,这些盐也是
金属离子
螯合剂和洗涤剂添加剂。这些多功能化合物是从选择的单烷基
马来酸盐与选择的活性氢含有化合物反应所得到的反应产物。