The disclosure relates to: (a) 1,3-dioxolane and 1,3-dioxane polycarboxylates and their precursors having the general formula: ##STR1## wherein X may be selected from the group consisting of H, CCl.sub.3, CO.sub.2 R, where R is H or lower alkyl, CO.sub.2 M, where M is alkali metal, preferably Na, NH.sub.4 or trialkanolammonium, at least three of the X substituents are other than hydrogen, n is 1 or 2, (b) processes for preparing the compounds and precursors of (a) above by the reaction of a halogenated alcohol with a reactive carbonyl to form a halogenated hemi-ketal or hemi-acetal, followed by the reaction with a base to effect cyclization, (c) detergent compositions comprising additions of carboxylate compounds of (a) to enhance detergency as builders, thresholding agents or the like, and (d) water treating processes comprising contacting water containing hardness ions with amounts of carboxylate compounds of (a) effective to sequester, chelate or bind such ions so as to reduce the water hardness and/or improve operations using the thus treated water.
该披露涉及:(a) 具有一般公式的1,3-二氧杂
环戊烷和1,3-二氧杂环
戊醚聚
羧酸酯及其前体:其中X可从H、CCl.sub.3、CO.sub.2 R(其中R为H或较低的烷基)、CO.sub.2 M(其中M为碱
金属,优选为Na、NH.sub.4或三烷基醇
铵)所组成的组中选择,至少三个X取代基不是氢,n为1或2;(b) 通过卤代醇与反应性羰基反应形成卤代半
缩酮或
半缩醛,然后与碱反应进行环化来制备上述(a)化合物和前体的工艺;(c) 包括添加(a)中的
羧酸化合物以增强作为建筑材料、阈值剂或类似物的洗涤剂组成,以增强洗涤性能;(d)
水处理工艺包括将含有硬度离子的
水与(a)中的
羧酸化合物接触,以有效地螯合、螯合或结合这些离子,从而减少
水的硬度和/或改善使用经过处理的
水的操作。