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公开(公告)号：US10807876B2
公开(公告)日：2020-10-20
申请号：US15944100
申请日：2018-04-03
申请人： SOLVAY SA
摘要： 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.
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公开(公告)号：US09051627B2
公开(公告)日：2015-06-09
申请号：US13716581
申请日：2012-12-17
申请人： Solvay SA
发明人： Hugo Walravens , Kurt Allen , Thoi-Dai Chau , Alain Vandendoren
摘要： 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.
摘要翻译： 一种由含碳酸钠的物流（A）生产碳酸氢钠的方法，其包含至少2％重量的氯化钠和/或硫酸钠，一部分这种物流（A）由碳酸钠结晶器生成，其包括：a） 将流（A）与一部分流（B）混合以产生流（C）; b）用包含CO 2的气体（D）对流（C）进行碳酸氢化以产生含有包含碳酸氢钠晶体的晶体（F）的水性悬浮液（E）; c）分离含水悬浮液（E）以获得包含碳酸氢钠晶体和含水母液（G）的晶体（F）; d）部分去碳酸化这种液体（G）并除去部分水以获得流（B）和任选的气体（H）; e）将至少部分流（B）再循环到步骤a）; 和f）除去待进一步处理的物流（B）或母液（G）的一部分的剩余部分。
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公开(公告)号：US08865095B2
公开(公告)日：2014-10-21
申请号：US13716691
申请日：2012-12-17
申请人： Solvay SA
发明人： Hugo Walravens , Kurt Allen , Thoi-Dai Chau , Alain Vandendoren
摘要： 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.
摘要翻译： 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。
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