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.

公开(公告)号：US20130156663A1

公开(公告)日：2013-06-20

申请号：US13716691

申请日：2012-12-17

Applicant: Solvay SA

Inventor： Hugo WALRAVENS ,  Kurt ALLEN ,  Thoi-Dai CHAU ,  Alain VANDENDOREN

IPC: C22B26/10

CPC classification number: C22B26/10 ,  C01D7/10

Abstract: A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising sodium carbonate and an alkaline metal salt impurity at a concentration Ci(A), comprising: a) mixing the stream (A) with part of a stream (B), b) bicarbonating the resulting mixed stream with a gas comprising CO2 to produce an aqueous suspension comprising sodium bicarbonate crystals (F), c) separating the sodium bicarbonate crystals (F) from the aqueous liquor (G), d) partly debicarbonating at least part of (G) and removing part of the water of (G) to obtain the stream (B) with the salt impurity at a concentration Cf(B), e) recycling part of the stream (B) to step a) so that the ratio of the concentrations Cf(B)/Ci(A) of the impurity is at least: 1.4, and f) removing the remainder (I) of the stream (B) or the remainder (J) of the liquor (G) to be further processed.

Abstract translation: 一种从含碳酸钠的碳酸钠（A）生产碳酸氢钠的方法，其包含浓度为C 1（A）的碳酸钠和碱金属盐杂质，其包括：a）将料流（A）与一部分流（B）混合， b）用包含CO 2的气体对所得混合物进行碳酸氢化以产生包含碳酸氢钠晶体（F）的水性悬浮液，c）从含水液体（G）中分离碳酸氢钠晶体（F），d）至少部分脱氯化 （G）的一部分并除去部分（G）的水以获得浓度为Cf（B）的盐杂质的流（B），e）将部分流（B）再循环到步骤a），使得 杂质的浓度Cf（B）/ Ci（A）的比值至少为1.4，f）除去液体（B）的液流（B）或余量（J）的剩余物（I） 进一步处理。

公开(公告)号：US20180169567A1

公开(公告)日：2018-06-21

申请号：US15739350

申请日：2016-07-01

Applicant: SOLVAY SA

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

IPC: B01D53/04 ,  B01D53/06 ,  C01D7/18

CPC classification number: B01D53/0462 ,  B01D53/06 ,  B01D2257/504 ,  B01D2259/40005 ,  C01D7/18 ,  Y02C10/08 ,  Y02P20/152

Abstract: Process wherein a low CO2 content process gas generated by an ammonia-soda process unit or a refined sodium bicarbonate unit is enriched by using a Temperature Swing Adsorption CO2 concentration module into a CO2 enriched gas whose CO2 content is increased by at least +10% by volume on dry gas basis relative to the process gas, and which is subsequently recycled to the ammonia-soda process unit or optionally to the refined sodium bicarbonate unit, in order: to produce sodium carbonate, or sodium bicarbonate, or to carbonate at least part of effluent from the unit for producing sodium carbonate or bicarbonate. The TSA CO2 concentration module comprises a stator and a rotor connected to the stator and rotatable relatively to the stator about a rotational axis, the rotor comprising a plurality of sectors, each sector containing a separation device to separate at least part of the CO2 from the process gas which is led into the separation device, and each sector being fluidically connected with at least one rotary active valve.

公开(公告)号：US20130156662A1

公开(公告)日：2013-06-20

申请号：US13716581

申请日：2012-12-17

Applicant: SOLVAY SA

Inventor： Hugo WALRAVENS ,  Kurt ALLEN ,  Thoi-Dai CHAU ,  Alain VANDENDOREN

IPC: C22B26/10

CPC classification number: C22B26/10 ,  C01D7/10

Abstract: A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising at least 2% sodium chloride and/or sodium sulfate by weight, a part of such stream (A) being generated by a sodium carbonate crystallizer, comprising: a) mixing the stream (A) with part of a stream (B) to produce a stream (C); b) bicarbonating the stream (C) with a gas (D) comprising CO2 to produce an aqueous suspension (E) containing crystals (F) comprising sodium bicarbonate crystals; c) separating the aqueous suspension (E) to obtain crystals (F) comprising sodium bicarbonate crystals and an aqueous mother liquor (G); d) partly debicarbonating such liquor (G) and removing part of the water to obtain the stream (B) and an optional gas (H); e) recycling at least part of the stream (B) to step a); and f) removing the remainder of the stream (B) or part of the aqueous mother liquor (G) to be further processed.