Clean production method for substituted thiourea

• Main Authors: ZHU JIANQIANG, YU JIANFU, CAO YANG, GAO XUHONG, CUI JIAN, BI BO, LI SENZHANG, XUE RUIDE
• Format: Patent
• Language: Chinese; English
• Published: 06.07.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a clean production method for substituted thiourea. The clean production method comprises the steps of S1 carrying out charging; S2 carrying out a reaction; S3 carrying out centrifuging; S4 preparing substituted thiourea; S5 treating filtrate C; S6 concentrating an ammonium sulfate solution; S7 extracting ammonium sulfate; S8 extraction ammonium thiocyanate; S9 recovering mother liquor N; S10 recovering washing liquid F; S11 supplementing ammonium thiocyanate; and S12 supplementing deionized water. According to the clean production method for the substituted thiourea, water resources are recycled and used as process water, so that the water consumption is reduced, the problem of production wastewater of the substituted thiourea is thoroughly solved, and a zero-emission clean production mode is realized. 本发明公开了一种用于取代硫脲的清洁生产方法，包括以下步骤：S1、加料；S2、反应；S3、离心；S4、制备取代硫脲；S5、滤液C处理；S6、硫酸铵溶液的浓缩；S7、硫酸铵的提取；S8、硫氰酸铵的提取；S9、母液N回收；S10、洗涤液F回收；S11、补充硫氰酸铵；S12、补充去离子水。本发明所述的一种用于取代硫脲的清洁生产方法，水资源回收用做工艺用水，不仅减少了水的取用，