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41. 发明授权

US4001381A Manufacturing process for heavy sodium carbonates in briquette form 失效
标题翻译：重型碳酸钙制造方法
公开(公告)号：US4001381A
公开(公告)日：1977-01-04
申请号：US381058
申请日：1973-07-20
申请人： Aurelian M. Dascalescu , Grigore O. Socolescu
发明人： Aurelian M. Dascalescu , Grigore O. Socolescu
IPC分类号： C01D7/12 , C01D7/18 , C01D7/38 , C01D7/37
CPC分类号： C01D7/18 , C01D7/123 , C01D7/38
摘要： The invention is a heavy sodium carbonate -dense soda- in the form of briquettes, having great density, and includes also the commercial forms of heavy sodium carbonate in the form of powder, grains and briquettes, which products are obtained by grinding - or not as required - the briquettes. The invention also comprises a novel process which produces these briquettes by briquetting of the dry sodium bicarbonate from the SOLVAY or TRONA soda ash fabrication process, which after filtering or centrifuging and drying is briquetted at a pressure between 500 to 1000 kg/cm.sup.2 ; the briquettes with a density of 1.8 kg/dm.sup.3, are then introduced into a heated static space at 700.degree. to 750.degree. C., and maintained there until the bicarbonate briquettes turn into dense sodium carbonate briquettes, with a density of 2.2 - 2.4 kg/dm.sup.3.

42. 发明授权

US3868444A Process for the preparation of porous sodium bicarbonate 失效
标题翻译：制备多孔二硼酸钠的方法
公开(公告)号：US3868444A
公开(公告)日：1975-02-25
申请号：US88042469
申请日：1969-11-26
申请人： DOW CHEMICAL CO
发明人： FREVEL LUDO K , KRESSLEY LEONARD J
IPC分类号： B01J20/04 , C01D7/02 , C01D7/37 , C01D7/38 , C01D7/10
CPC分类号： C01D7/38 , B01J20/043 , B01J20/3085 , C01D7/02 , C01D7/37
摘要： Disclosed is a process for preparing hard, porous granules of sodium bicarbonate having a surface area greater than 0.5 square meter per gram. The process involves reacting ammonium bicarbonate with a soluble sodium salt in aqueous solution wherein the concentration Na is greater than about 2.5 gram ions per liter and the concentration of HCO3 is greater than about 0.04 gram ions per liter, while agitating the solution and adding carbon dioxide thereto in an amount sufficient to create a partial pressure of from 15 to 40 psig. The sodium bicarbonate crystals formed during the reaction are separated from the aqueous solution and dried at a temperature of from about 20* to about 75*C. The sodium bicarbonate product is especially useful for removing SO2, as well as other acid gases, from flue gas due to its high surface area.
摘要翻译：公开了一种制备表面积大于0.5平方米/克的硬质多孔碳酸氢钠颗粒的方法。该方法包括使碳酸氢铵与水溶液中的可溶性钠盐反应，其中Na +的浓度大于约2.5克/升，并且HCO 3 - 的浓度大于约0.04克/升，同时搅拌该溶液并以足以产生15至40psig分压的量加入二氧化碳。在反应过程中形成的碳酸氢钠晶体与水溶液分离，并在约20℃至约75℃的温度下干燥。碳酸氢钠产物特别可用于从烟道中除去SO 2以及其它酸性气体气体由于其高的表面积。

43. 发明授权

US3855398A Sodium carbonate and bicarbonate sperulites from chlorine electrolytic cell liquors 失效
标题翻译：碳酸钙和二氯碳酸钠从氯化物电解池液体中
公开(公告)号：US3855398A
公开(公告)日：1974-12-17
申请号：US35045473
申请日：1973-04-12
申请人： ALLIED CHEM
发明人： HOFFMAN R , FOLLOWS A
IPC分类号： C01D7/07 , C01D7/12 , C01D7/38 , C01D7/40 , C01D7/34
CPC分类号： C01D7/12 , C01D7/07 , C01D7/38 , C01D7/40
摘要： By-product sodium hydroxide/sodium chloride cell liquor obtained from the electrolytic production of chlorine serves as raw material for a method of producing spherulites of sodium bicarbonate, and an enriched sodium chloride/carbonate solution suitable for re-use, by the expedient of carbonating the cell liquor in the presence of 200 to 2,500 parts of a water-soluble alkaline phosphate, and recovering the spherulites of sodium bicarbonate from the enriched liquor. Sodium carbonate in the form of hard free-flowing spherules is readily obtained from the spherulites of sodium bicarbonate by calcination.
摘要翻译：由氯电解生产得到的副产物氢氧化钠/氯化钠电池液用作生产碳酸氢钠球晶的方法的原料，适用于再利用的富氯化钠/碳酸盐溶液，通过碳酸化在200至2,500份水溶性碱性磷酸盐存在下的细胞液，并从富集液中回收碳酸氢钠球晶。硬质自由流动小球形式的碳酸钠通过煅烧容易地从碳酸氢钠球晶中获得。

44. 发明授权

US3097075A Method for producing a graded pulverulent material 失效
标题翻译：梯度粉状材料的制造方法
公开(公告)号：US3097075A
公开(公告)日：1963-07-09
申请号：US12510961
申请日：1961-07-19
申请人： BUELL ENGINEERING COMPANY INC
发明人： JEAN-PAUL VANDENHOECK
IPC分类号： B04C9/00 , B07B9/02 , C01D7/38
CPC分类号： B07B9/02 , B04C9/00 , B04C2009/002 , C01D7/38

45. 发明授权

US1906574A Soda ash briquet and method of making it 失效
标题翻译：纯碱砖和其制作方法
公开(公告)号：US1906574A
公开(公告)日：1933-05-02
申请号：US44777130
申请日：1930-04-26
申请人： PITTSBURGH PLATE GLASS CO
发明人： GLEICHERT HARRY W
IPC分类号： C01D7/38
CPC分类号： C01D7/38

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