APPARATUS AND PROCESS FOR COLLECTING A SOLID PRODUCT FROM A LIQUID PHASE OR LIQUID PHASE-GASEOUS PHASE FEED STOCK

摘要

1318961 Washing solid product; crystallization by evaporation SAGAMI CHEMICAL RESARCH CENTER 21 July 1970 [21 July 1969] 35320/70 Headings B1B and B1F A process for the production of solid oxamido, comprises passing cyanogen through conduit 3, Fig. 1, into a solution of mineral acid in a reaction zone where solid oxamide is formed, and letting the oxamide pass down washing zone 2 where it is washed in countercurrent with water from 6, the desired circulation being achieved by a stirrer 8 which rotated slowly so as to prevent turbulence and to prevent liquid from zone 1 descending into the washing zone. In the apparatus of Fig. 3, brine concentrate is concentrated by heating in zone 1, and the common salt crystals so formed pass down washing zone 2 where they are washed in countercurrent by brine from 5, the desired circulation being achieved by a stirrer 8 which is rotated slowly so as to prevent turbulence and to prevent liquid from zone 1 descending into zone 2.