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：US20180222759A1

公开(公告)日：2018-08-09

申请号：US15944100

申请日：2018-04-03

Applicant: SOLVAY SA

Inventor： Perrine DAVOINE ,  Francis M. COUSTRY ,  Jean-Paul DETOURNAY ,  Kurt ALLEN

IPC: C01D7/10 ,  C01D7/24 ,  C01D7/12 ,  C01D7/00 ,  B01D53/40

CPC classification number: C01D7/10 ,  B01D53/40 ,  B01D53/77 ,  B01D2251/304 ,  B01D2251/606 ,  B01D2257/2045 ,  B01D2257/302 ,  B01D2257/504 ,  C01D7/00 ,  C01D7/126 ,  C01D7/24 ,  Y02P20/152

Abstract: Process for the joint production of sodium carbonate and sodium bicarbonate crystals, according to which: a solid powder derived from sodium sesquicarbonate, having a mean particle diameter comprised between 0.1 and 10 mm is dissolved in water; the resulting water solution is introduced into a crystallizer, wherein a first water suspension comprising sodium carbonate crystals is produced; the first water suspension is subjected to a separation, in order to produce crystals comprising sodium carbonate on the one hand, which are valorized, and a mother liquor on the other hand; and a part of the mother liquor is taken out of the crystallizer and put into contact in, a gas liquid contactor, with a gas comprising carbon dioxide, in order to produce a second water suspension comprising sodium bicarbonate crystals, which are separated and valorized. A reagent powder comprising sodium bicarbonate crystals made by such process.

公开(公告)号：US20150098876A1

公开(公告)日：2015-04-09

申请号：US14568810

申请日：2014-12-12

Applicant: SOLVAY SA

Inventor： Perrine DAVOINE ,  Francis M. COUSTRY ,  Jean-Paul DETOURNAY ,  Kurt ALLEN

IPC: C01D7/10

CPC classification number: C01D7/10 ,  B01D53/40 ,  B01D53/77 ,  B01D2251/304 ,  B01D2251/606 ,  B01D2257/2045 ,  B01D2257/302 ,  B01D2257/504 ,  C01D7/00 ,  C01D7/126 ,  C01D7/24 ,  Y02P20/152

Abstract: Process for the joint production of sodium carbonate and sodium bicarbonate crystals, according to which: a solid powder derived from sodium sesquicarbonate, having a mean particle diameter comprised between 0.1 and 10 mm is dissolved in water; the resulting water solution is introduced into a crystallizer, wherein a first water suspension comprising sodium carbonate crystals is produced; the first water suspension is subjected to a separation, in order to produce crystals comprising sodium carbonate on the one hand, which are valorized, and a mother liquor on the other hand; and a part of the mother liquor is taken out of the crystallizer and put into contact in, a gas liquid contactor, with a gas comprising carbon dioxide, in order to produce a second water suspension comprising sodium bicarbonate crystals, which are separated and valorized. A reagent powder comprising sodium bicarbonate crystals made by such process.

Abstract translation: 用于联合生产碳酸钠和碳酸氢钠晶体的方法，其中将来自碳酸二钠的固体粉末，其平均粒径为0.1至10mm，溶于水; 将所得水溶液引入结晶器中，其中制备包含碳酸钠晶体的第一水悬浮液; 将第一水悬浮液进行分离，以产生一方面包含加价的碳酸钠和另一方面是母液的晶体; 并将一部分母液从结晶器中取出并与气液接触器与包含二氧化碳的气体接触，以便产生包含碳酸氢钠晶体的第二水悬浮液，所述第二水悬浮液分离并加价。 包含通过这种方法制造的碳酸氢钠晶体的试剂粉末。

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.