-
公开(公告)号：US20190276326A1
公开(公告)日：2019-09-12
申请号：US16423709
申请日：2019-05-28
申请人： SOLVAY SA
摘要： A method for preparing alkali metal bicarbonate particles by crystallization from an alkali metal carbonate and/or bicarbonate solution with an additive present in the solution, chosen from among sulfates, sulfonates, polysulfonates, amines, hydroysultaines, polycarboxylates, polysaccharides, polyethers and ether-phenols, alkali metal hexametaphosphate, phosphates, sulfosuccinates, amidosulfonates, amine sulfonates, preferably chosen from among polysaccharides, and such that the additive is present in the solution at a concentration of at least 1 ppm and preferably at most 200 ppm.
-
公开(公告)号：US4183901A
公开(公告)日：1980-01-15
申请号：US927187
申请日：1978-07-24
申请人： Joseph M. Ilardi , Eric Rau
发明人： Joseph M. Ilardi , Eric Rau
摘要： Anhydrous sodium carbonate is crystallized from saturated aqueous sodium carbonate solutions at temperatures in the range of 104.degree. to below 109.degree. C. by adding to the solution very small proportions of additives which function to reduce the transition temperature of monohydrate to anhydrous sodium carbonate.
摘要翻译： 无水碳酸钠在饱和碳酸钠水溶液中在104至-109℃的温度范围内结晶，通过向溶液中加入非常少量的添加剂，这些添加剂起到降低一水合物与无水碳酸钠的转变温度的作用。
-
公开(公告)号：US3975499A
公开(公告)日：1976-08-17
申请号：US476560
申请日：1974-06-05
申请人： John Walden
发明人： John Walden
摘要： Process for producing sodium carbonate monohydrate crystals having a high bulk density, blocky crystal shape, and uniform particle size distribution from sodium carbonate solutions wherein the sodium carbonate monohydrate is crystallized in the presence of magnesium ions and sodium dodecylbenzenesulfonate.
摘要翻译： 生产碳酸钠一水合物晶体的方法，其中碳酸钠一水合物在镁离子和十二烷基苯磺酸钠存在下结晶，其具有高堆积密度，块状晶体形状和从碳酸钠溶液中均匀的粒度分布。
-
-
公开(公告)号：US2670269A
公开(公告)日：1954-02-23
申请号：US17352050
申请日：1950-07-13
发明人： RAHN HENRY W
IPC分类号： C01D7/40
CPC分类号： C01D7/40
-
公开(公告)号：US10308517B2
公开(公告)日：2019-06-04
申请号：US14900514
申请日：2014-06-26
申请人： SOLVAY SA
摘要： A method for preparing alkali metal bicarbonate particles by crystallization from an alkali metal carbonate and/or bicarbonate solution with an additive present in the solution, chosen from among sulfates, sulfonates, polysulfonates, amines, hydroxysultaines, polycarboxylates, polysaccharides, polyethers and ether-phenols, alkali metal hexametaphosphate, phosphates, sulfosuccinates, amidosulfonates, amine sulfonates, preferably chosen from among polysaccharides, and such that the additive is present in the solution at a concentration of at least 1 ppm and preferably at most 200 ppm.
-
公开(公告)号：US07713312B2
公开(公告)日：2010-05-11
申请号：US11409050
申请日：2006-04-24
IPC分类号： C01D7/40
CPC分类号： C01D7/10
摘要： A process for producing an alkali metal hydrogencarbonate by reacting an aqueous solution containing alkali metal ions with carbon dioxide in a prescribed crystallizer to precipitate crystals of an alkali metal hydrogencarbonate, and in this process a part of a slurry containing the alkali metal hydrogencarbonate crystals in the aqueous solution is withdrawn from the crystallizer and, after dissolution of a part of the crystals, it is returned to the crystallizer.
摘要翻译： 一种碱金属碳酸氢盐的制造方法，其特征在于，在含有碱金属离子的水溶液与规定的结晶器中的二氧化碳反应生成碱金属碳酸氢盐，使碱金属碳酸氢盐的结晶析出，在该工序中，将含有碱金属碳酸氢盐结晶的浆料 从结晶器中取出水溶液，在溶解部分晶体后，将其返回结晶器。
-
公开(公告)号：US3956457A
公开(公告)日：1976-05-11
申请号：US187578
申请日：1971-10-07
CPC分类号： C01D7/126
摘要： Sodium carbonate monohydrate from crude trona is prepared by calcining the crude trona to crude sodium carbonate, dissolving the crude sodium carbonate in an aqueous solution, clarifying and filtering the resulting solution to remove insoluble material to form a carbonate process solution, subjecting the carbonate process solution to a first crystallization to form a first crop of sodium carbonate monohydrate crystals from said carbonate process solution, subjecting the mother liquor separated from the first crop of monohydrate crystals and having a higher concentration of soluble organics to a second crystallization, including a crystallization temperature higher than that employed to obtain the first crop of said monohydrate crystals, to effect formation of a second crop of sodium carbonate monohydrate crystals, and separating said second crop of monohydrate crystals from a mother liquor having an organics level higher than said carbonate process solution and said mother liquor separated from said first crystallization.
摘要翻译： 通过将粗天然碱煅烧成粗碳酸钠，将粗碳酸钠溶解在水溶液中，澄清并过滤所得溶液以除去不溶性物质以形成碳酸盐工艺溶液，使碳酸盐工艺溶液 进行第一次结晶以从所述碳酸盐工艺溶液形成第一批碳酸钠一水合物晶体，将从第一批一水合物晶体分离并具有较高浓度可溶性有机物的母液进行第二次结晶，包括结晶温度较高 比用于获得第一批所述一水合物晶体的那些，以实现第二批碳酸钠一水合物晶体的形成，并将所述第二批次的一水合物晶体与具有高于所述碳酸盐处理溶液的有机物含量的母液分离，并且所述 母液分离 从所述第一次结晶。
-
公开(公告)号：US3933977A
公开(公告)日：1976-01-20
申请号：US432467
申请日：1974-01-11
申请人： Joseph M. Ilardi , John Walden , Eric Rau
发明人： Joseph M. Ilardi , John Walden , Eric Rau
摘要： This invention involves a process for producing high bulk density sodium carbonate from crude trona wherein sodium carbonate monohydrate purge streams containing high amounts of organic impurities are passed to an anhydrous crystallizer operated at temperatures above about 109.degree.C wherein anhydrous sodium carbonate crystals are formed having high bulk densities of about 60 to about 80 lbs/ft.sup.3.
摘要翻译： 本发明涉及一种从粗天然碱生产高体积密度碳酸钠的方法，其中将含有大量有机杂质的碳酸钠一水合物清洗流通入在高于约109℃的温度下操作的无水结晶器，其中形成的高级无水碳酸钠晶体具有高 堆积密度约为60至80磅/平方英尺。
-
10.发明授权
公开(公告)号：US3855397A
公开(公告)日：1974-12-17
申请号：US35045373
申请日：1973-04-12
申请人： ALLIED CHEM
摘要： Free-flowing spherules of sodium bicarbonate are prepared from a sodium carbonate or from salt brine, substantially saturated with ammonia, by carbonating the sodium carbonate solution, or the ammonia-saturated brine with carbon dioxide in the presence of from 200 to 2500 parts per million of a water soluble alkaline phosphate. Spherules of sodium bicarbonate crystallizing from the solutions are separated as a product having a bulk density between about 32 to 48 pounds per cubic foot, and a screen size substantially between 14 and 100 mesh. Sodium carbonate spherules are also readily obtained by calcining the sodium bicarbonate spherules.
摘要翻译： 碳酸氢钠的自由流动的小球由碳酸钠或盐水充分制备，基本上用氨饱和，碳酸钠溶液或氨饱和的盐水用二氧化碳在200至2500ppm的范围内 的水溶性碱性磷酸盐。 从溶液中结晶的碳酸氢钠球形体作为堆积密度在约32至48磅/立方英尺之间的产物和基本上在14至100目之间的筛网尺寸分离。 通过煅烧碳酸氢钠球粒也容易获得碳酸钠球。
-
-
-
-
-
-
-
-
-
搜索结果
40 条记录 (耗时 0.018 秒)
