公开(公告)号：US20180050916A1

公开(公告)日：2018-02-22

申请号：US15538774

申请日：2015-12-22

Applicant: SOLVAY SA

Inventor： Eric VANDERVORST ,  David Jean Lucien SAVARY ,  Gérard DUPONT ,  Hugo WALRAVENS ,  Eric DUBOIS ,  Jean-Paul COQUEREL ,  Perrine DAVOINE ,  Karine CAVALIER ,  Ines HURTADO DOMINGEZ ,  Salvador ASENSIO

IPC: C01B32/60 ,  C01D7/12 ,  C01D7/18 ,  B01D53/04 ,  B01D53/047 ,  B01D53/22 ,  B01D53/00

CPC classification number: C01B32/60 ,  B01D53/002 ,  B01D53/0462 ,  B01D53/047 ,  B01D53/22 ,  B01D53/64 ,  B01D2256/22 ,  B01D2257/504 ,  B01D2258/02 ,  B01D2258/0283 ,  C01D7/12 ,  C01D7/18 ,  Y02C10/08 ,  Y02C10/10 ,  Y02P20/152

Abstract: Process for producing sodium carbonate with ammonia and/or for producing refined sodium bicarbonate, wherein: a low CO2 content gas generated by a unit for producing sodium carbonate with ammonia and/or generated by a unit for producing refined sodium bicarbonate is enriched into a CO2-enriched gas by using a CO2 concentration module, such as an amine-type or ammonia or PSA or TSA or cryogenic distillation or membrane-type CO2 concentration module, and said CO2-enriched gas has an increased CO2 content of: +10% (at least) to +90% (at most), by volume on a dry gas basis relative to the CO2 concentration of the low content gas, and the CO2-enriched gas is subsequently recycled to the unit for producing sodium carbonate with ammonia and/or to the unit for producing refined sodium bicarbonate, to produce sodium carbonate, or sodium bicarbonate, or to carbonate at least one part of effluent from the unit for producing sodium carbonate and/or from the unit for producing sodium bicarbonate.