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    • 31. 发明申请
    • METHOD FOR PRODUCING ISOCYANATE
    • 生产异氰酸酯的方法
    • US20160052874A1
    • 2016-02-25
    • US14781192
    • 2014-03-28
    • ASAHI KASEI CHEMICALS CORPORATION
    • Masaaki SHINOHATAKouji TAKEUCHINaoki FUJIMOTONobuhisa MIYAKE
    • C07C263/04C07C269/04
    • C07C263/04C07C269/04Y02P20/51C07C265/14C07C271/06
    • A method for producing an isocyanate, comprising: a carbamation step of generating an N-substituted carbamate from an organic primary amine, urea and an organic hydroxy compound according to a carbamation reaction, and then recovering a first gaseous phase component containing the urea and/or a compound having a carbonyl group derived from the urea, the organic hydroxy compound, and ammonia; a condensation step of condensing the first gaseous phase component with a condenser; an isocyanate production step of producing an isocyanate by subjecting the N-substituted carbamate to pyrolysis; an ammonia absorption step of allowing a second gaseous phase component containing ammonia recovered as a gaseous phase component from the condenser as a main component, to be absorbed by absorption water, and generating gas-absorbed water; and an ammonia stripping step of heating the gas-absorbed water to separate ammonia from the gas-absorbed water.
    • 一种异氰酸酯的制造方法,包括:根据氨基甲酰化反应从有机伯胺,脲和有机羟基化合物生成N-取代氨基甲酸酯的氨基甲酸酯化步骤,然后回收含有尿素和/ 或具有衍生自脲,羰基有机羟基化合物和氨的化合物; 使第一气相成分与冷凝器冷凝的冷凝工序; 通过使N-取代氨基甲酸酯进行热解而制造异氰酸酯的异氰酸酯制造工序; 将从冷凝器回收成为气相成分的氨的第二气相成分作为主要成分进行吸收的氨吸收工序,吸收吸收水, 以及氨汽提步骤,加热气体吸收的水分离氨与气体吸收的水分离。
    • 35. 发明申请
    • SYSTEM FOR RECOVERY OF ELECTRODEPOSITION PAINT
    • 电沉积复原系统
    • US20150273397A1
    • 2015-10-01
    • US14738365
    • 2015-06-12
    • ASAHI KASEI CHEMICALS CORPORATION
    • Yoshiro ARIMORIToshiaki KANEKOSachio ASANAGI
    • B01D61/14
    • B01D61/145B01D61/147B05B14/462B05B14/463C25D13/24C25D21/06C25D21/18
    • An object of the present invention is to provide a system for recovery of electrodeposition paint wherein the loss of the electrodeposition paint is not increased, even if the number of stages of a multistage recovery and washing process with a membrane filtration filtrate is reduced in electrodeposition painting. The system for recovery of electrodeposition paint of the present invention, in which a membrane filtration filtrate of electrodeposition bath liquid is supplied to a final stage washing tank of the multistage recovery and washing process with a membrane filtration filtrate, is characterized in that a filtrate obtained by membrane filtration of the final stage washing tank liquid is supplied to the final stage washing tank and concentrated liquid is supplied to the electrodeposition bath and/or a washing tank at other than the final stage.
    • 本发明的目的是提供一种电沉积涂料的回收系统,其中电沉积涂料的损失不会增加,即使在电沉积涂料中减少膜过滤滤液的多级回收和洗涤过程的阶段数量减少 。 本发明的电沉积涂料回收系统,其中将电沉积浴液体的膜过滤滤液用膜过滤滤液供应到多级回收和洗涤过程的最终级洗涤槽,其特征在于将获得的滤液 通过最终级洗涤槽液体的膜过滤被供给到最终级洗涤槽,并将浓缩的液体供给到不同于最后阶段的电沉积浴和/或洗涤槽。