Method for producing acetic acid
    2.
    发明授权

    公开(公告)号:US11773044B2

    公开(公告)日:2023-10-03

    申请号:US16334667

    申请日:2018-05-02

    发明人: Masahiko Shimizu

    摘要: A method for producing acetic acid can improve the life of a silver-substituted ion exchange resin for removing organic iodine compounds in acetic acid. In a carbonylation process of a methanol method, an acetic acid distillation step has at least one distillation step of carrying out the purification of an acetic acid stream under conditions of a column bottom temperature of a distillation column of less than 175° C., a nickel base alloy or zirconium is used as a material of the distillation column in the distillation step, and as metal ion concentrations in a charging mixture of the distillation column in the distillation step, an iron ion concentration is less than 10,000 ppb by mass, a chromium ion concentration is less than 5,000 ppb by mass, a nickel ion concentration is less than 3,000 ppb by mass, and a molybdenum ion concentration is less than 2,000 ppb by mass.

    RECOVERY AND PRECIPITATION OF VARIOUS ELEMENTS AND COMPOUNDS
    8.
    发明申请
    RECOVERY AND PRECIPITATION OF VARIOUS ELEMENTS AND COMPOUNDS 审中-公开
    各种元素和化合物的回收和降解

    公开(公告)号:US20150315672A1

    公开(公告)日:2015-11-05

    申请号:US14630133

    申请日:2015-02-24

    摘要: Systems and methods are disclosed for extracting a plurality of materials from a solution. These include a plurality of extraction devices. The extraction devices use a resin suspended above at least one screen, and the resin is used to extract at least one material from a fluid. A liquid is forced through the plurality of extraction devices and a separate material is extracted in each of the extraction devices. The resin is selected for each of the extraction devices and is based upon the material for which that extraction device is designed to remove from the fluid. Each of the extraction devices operate in series to remove at least one material from the fluid.

    摘要翻译: 公开了用于从解决方案中提取多种材料的系统和方法。 这些包括多个提取装置。 提取装置使用悬浮在至少一个筛网上方的树脂,并且该树脂用于从流体中提取至少一种材料。 液体被迫通过多个提取装置,并且在每个提取装置中提取单独的材料。 为每个提取装置选择树脂,并且基于提取装置被设计成从流体中去除的材料。 每个提取装置串联操作以从流体中去除至少一种材料。