Novel methods for preparing polycarboxylic compounds which are useful as metal sequestrants and food acidulants are disclosed. These compounds are aconitic acid and a mixture of aconitic acid, and the lactones of isocitric acid and alloisocitric acid. The compounds can be neutralized to the corresponding salts which, in turn, are metal sequestering agents. The novel methods include chlorination of propane-1,1,2,3-tetracarboxylic tetraesters.
本发明揭示了制备多
羧酸化合物的新方法,这些化合物可用作
金属
螯合剂和食品酸化剂。这些化合物包括顺式-不饱和
丁烯二酸和顺式-不饱和
丁烯二酸内酯和
异柠檬酸内酯的混合物。这些化合物可以被中和成相应的盐,进而成为
金属
螯合剂。本发明的新方法包括对
丙烷-1,1,2,3-四
羧酸四酯进行
氯化反应。