CAUSTIC PRODUCT WITH FREEZE PROTECTION
    5.
    发明申请
    CAUSTIC PRODUCT WITH FREEZE PROTECTION 审中-公开
    具有防冻保护功能的产品

    公开(公告)号:US20090173909A1

    公开(公告)日:2009-07-09

    申请号:US12337799

    申请日:2008-12-18

    IPC分类号: B01D53/74 C09K5/00

    摘要: A freeze-protected concentrated solution of alkali metal hydroxide comprising (a) at least 46% by weight of alkali metal hydroxide wherein at least 80% by weight of the alkali metal hydroxide is sodium hydroxide and (b) no more than 1.5% by weight of an additive selected from the group consisting of sulfuric acid and its alkali metal salts, citric acid and its alkali metal salts, and triglyceride. The freeze-protected solution has a freeze point of 5° C. or less, and thus is able to withstand temperatures below the normal freeze points of concentrated alkali metal hydroxide solutions. A process to prepare of the freeze-protected solution comprises adding the additive to a concentrated alkali metal hydroxide solution.

    摘要翻译: 一种防冻浓缩的碱金属氢氧化物溶液,其包含(a)至少46重量%的碱金属氢氧化物,其中至少80重量%的碱金属氢氧化物是氢氧化钠,和(b)不超过1.5重量% 的选自硫酸及其碱金属盐,柠檬酸及其碱金属盐和甘油三酸酯的添加剂。 冷冻保护溶液的凝固点为5℃以下,因此能够耐受低于浓缩的碱金属氢氧化物溶液的正常凝固点的温度。 制备冷冻保护溶液的方法包括将添加剂加入浓缩的碱金属氢氧化物溶液中。