公开(公告)号：US3856696A

公开(公告)日：1974-12-24

申请号：US30102872

申请日：1972-10-26

Applicant: BRITISH OXYGEN CO LTD

Inventor： STANBANK D ,  LEIGH R ,  GIBSON G

IPC: C01B17/66 ,  C11D7/54 ,  D06L4/30 ,  D06P1/28 ,  D06P1/653 ,  D06P1/673 ,  D21C9/10 ,  C09K3/00

CPC classification number: C01B17/665 ,  D06L4/30 ,  D06P1/653 ,  D06P1/67375 ,  D21C9/1089

Abstract: A substantially anhydrous and homogeneous composition consisting essentially of a dithionite selected from sodium, potassium and calcium dithionites and from 0.1 to 10% by weight in said composition of an unsaturated carboxylic acid or an anhydride thereof. Preferred acids are aryloxy alkanoic acids of formula ArORCO2H wherein Ar is a substituted or unsubstituted aryl group and R is a substituted or unsubstituted methylene or polymethylene group. Most preferred is phenoxyacetic acid. Such acids may exhibit enhanced effectiveness over previous stabilizers.

Abstract translation: 基本上无水和均匀的组合物，其基本上由选自连二亚硫酸钠，钾和钙的连二亚硫酸盐和所述组合物中的0.1至10重量％的不饱和羧酸或其酸酐组成。 优选的酸是式ArORCO 2 H的芳氧基链烷酸，其中Ar是取代或未取代的芳基，R是取代或未取代的亚甲基或聚亚甲基。 最优选的是苯氧基乙酸。 这些酸可以表现出比以前的稳定剂更强的效力。