公开(公告)号：US4286967A

公开(公告)日：1981-09-01

申请号：US163848

申请日：1980-06-27

申请人： Elwood F. Booth, Jr. ,  Rustom P. Poncha

发明人： Elwood F. Booth, Jr. ,  Rustom P. Poncha

IPC分类号： C01D7/37 ,  C30B9/02

CPC分类号： C01D7/37

摘要： A process for the production of low organic, low silica, anhydrous sodium carbonate comprising (a) calcining raw trona ore to produce crude sodium carbonate containing soluble and insoluble impurities, (b) admixing said crude sodium carbonate with a substantially saturated sodium carbonate solution to produce sodium carbonate monohydrate crystals containing insolubles and an impure sodium carbonate solution; (c) separating these monohydrate crystals and impurities; (d) dissolving the monohydrate crystals to produce a substantially saturated sodium carbonate solution and insolubles; (e) separating said solution from the insolubles; (f) evaporative crystallization of the separated saturated sodium carbonate solution to produce pure sodium carbonate monohydrate crystals; (g) optionally, subjecting the crystals recovered in step (f) to steps (d-f) once, but no more than once; (h) heating said monohydrate crystals to obtain low organic, low silica, anhydrous sodium carbonate product particles; and (i) optionally, repeating the sequence defined by steps (b-h) once, but no more than once is disclosed.

摘要翻译： 一种生产低有机，低二氧化硅，无水碳酸钠的方法，包括（a）煅烧生天然碱矿石以生产含有可溶性和不溶性杂质的粗碳酸钠，（b）将所述粗碳酸钠与基本上饱和的碳酸钠溶液混合， 产生含有不溶物的碳酸钠一水合物晶体和不纯的碳酸钠溶液; （c）分离这些一水合物晶体和杂质; （d）溶解一水合物晶体以产生基本饱和的碳酸钠溶液和不溶物; （e）将所述溶液与不溶物分离; （f）分离的饱和碳酸钠溶液的蒸发结晶以产生纯的碳酸钠一水合物晶体; （g）任选地，使步骤（f）中回收的晶体经历步骤（d-f）一次，但不超过一次; （h）加热所述一水合物晶体以获得低有机，低二氧化硅，无水碳酸钠产品颗粒; 和（i）任选地，重复由步骤（b-h）定义的序列一次，但不超过一次。