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    • 5. 发明申请
    • CRYSTALLIZATION OF SODIUM CARBONATES USING ALCOHOLS
    • 使用醇的碳酸钙的结晶
    • WO1997041271A1
    • 1997-11-06
    • PCT/US1997006429
    • 1997-04-17
    • BOWMAN, Ronald, W.
    • BOWMAN, Ronald, W.
    • C22B26/10
    • B01D9/005B01D9/0059C01D7/126C01D7/24C01D7/28C01D7/40C22B26/10
    • A method of producing sodium carbonate crystals (34) from a sodium carbonate-containing solution (14) including the steps of passing the sodium carbonate solution (14) to a precipitator (12), adding methanol (16) to the sodium carbonate solution (14) in the precipitator (12) such that a resultant liquor has methanol in a concentration of between 15 % and 70 % by volume, precipitating the sodium carbonate from the resultant liquor (18), washing (20) the precipitated sodium carbonate crystals with an alcohol-containing solution (22) and drying the washed precipitated sodium carbonate crystals. The sodium carbonate-containing solution (14) has a sodium carbonate concentration ranging from 100g/l to saturation. The methanol is in residence with the sodium carbonate containing solution for between 10 and 100 minutes. The alcohol-containing solution (16) has an alcohol concentration ranging between 50 % and 100 %.
    • 一种从含碳酸钠溶液(14)制备碳酸钠晶体(34)的方法,包括将碳酸钠溶液(14)通入沉淀器(12)的步骤,将甲醇(16)加入到碳酸钠溶液 14),使得所得液体具有浓度为15体积%至70体积%的甲醇,从所得液体(18)中沉淀碳酸钠,用沉淀的碳酸钠晶体洗涤(20)沉淀的碳酸钠晶体, 含醇溶液(22)并干燥洗涤过的沉淀碳酸钠晶体。 含碳酸钠的溶液(14)的碳酸钠浓度为100g / l至饱和。 甲醇与含碳酸钠的溶液停留10至100分钟。 含醇溶液(16)的醇浓度为50%至100%。
    • 6. 发明申请
    • PROCESS FOR THE MANUFACTURE OF SODIUM CARBONATE, SODIUM BICARBONATE AND/OR SESQUICARBONATE
    • 碳酸钙,二硼酸钠和/或硫代碳酸钠的制备方法
    • WO1995032040A1
    • 1995-11-30
    • PCT/US1995006533
    • 1995-05-16
    • BOWMAN, Ronald, W.
    • B01D09/02
    • C22B26/10B01D9/005B01D9/0059C01D7/126C01D7/24C01D7/28C01D7/40Y02P10/234
    • A method of producing sodium carbonate from trona including the steps of passing a solution containing trona (14) to a precipitator (17), adding alcohol (16) to the solution in the precipitator so as to precipitate carbonate from the solution, washing (20) the precipitated carbonate with an alcohol-containing solution (22) and drying the washed precipitated carbonate. The solution containing trona has a concentration of trona ranging between 50 grams per litre to saturation at 200 DEG F at one atmosphere. The alcohol is methanol which is added at a concentration ranging from 10 to 90 volume percent. The alcohol is vacuum filtered from the precipitated carbonate prior to the step of washing. The precipitated carbonate is washed with methanol in a concentration of between 50 and 100 volume percent. The washed precipitated carbonate is dried by heating to a temperature of no less than 120 DEG F. The alcohol in this process is recycled through a distillation system (30, 38).
    • 一种从天然碱生产碳酸钠的方法,包括将含有天竺葵(14)的溶液通入沉淀器(17)的步骤,向沉淀器中的溶液中加入酒精(16),以从溶液中沉淀出碳酸盐,洗涤(20 )沉淀的碳酸酯与含醇溶液(22),并干燥洗涤过的沉淀碳酸盐。 含有天然碱的溶液的浓度范围在50克/升至200°F在一个大气压下饱和。 醇是以10至90体积%的浓度加入的甲醇。 在洗涤步骤之前,将醇从沉淀的碳酸盐中真空过滤。 沉淀的碳酸盐用浓度为50-100体积%的甲醇洗涤。 经洗涤的沉淀碳酸盐通过加热至不低于120°F的温度来干燥。该方法中的醇通过蒸馏系统再循环(30,38)。