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1. 发明授权

US3957947A Process for continuous production of aqueous basic aluminum salt solutions 失效
标题翻译：连续生产碱性铝盐水溶液的方法
公开(公告)号：US3957947A
公开(公告)日：1976-05-18
申请号：US445605
申请日：1974-02-25
申请人： Koichi Yamada , Masao Yoshihara , Hisakatsu Kato
发明人： Koichi Yamada , Masao Yoshihara , Hisakatsu Kato
IPC分类号： C01F7/56 , C01F7/66 , C01F7/00
CPC分类号： C01F7/66 , C01F7/56
摘要： An aqueous basic aluminum salt high in basicity can be continuously produced with a high conversion by passing a slurry of aluminum hydroxide, alumina-containing mineral or a mixture thereof and hydrochloric or nitric acid through a tubular reactor and then reacting the initial stage reaction product with the unreacted alumina in a holding treatment portion provided subsequent to the tubular reactor.
摘要翻译：通过使氢氧化铝，含氧化铝的矿物或其混合物的浆料和盐酸或硝酸通过管式反应器，可以通过高转化率连续生产碱性高碱性碱性铝盐，然后使初级反应产物与在管状反应器之后设置的保持处理部分中的未反应的氧化铝。

2. 发明授权

US4311486A Process for producing coarse grains of aluminum hydroxide 失效
标题翻译：生产氢氧化铝粗颗粒的方法
公开(公告)号：US4311486A
公开(公告)日：1982-01-19
申请号：US175535
申请日：1980-08-05
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
IPC分类号： C01F7/14 , B01D9/02
CPC分类号： C01F7/144 , C01P2004/61
摘要： Coarse grains of aluminum hydroxide are economically produced in a high yield from sodium aluminate solution by dividing supersaturated sodium aluminate solution being prepared by the Bayer process and having a molar ratio of Na.sub.2 O as caustic soda to Al.sub.2 O.sub.3 in solution of less than 1.8 into two streams, adding a portion of recycle seed aluminum hydroxide and fine grains of aluminum hydroxide as seed to one of the streams of sodium aluminate solution, partially decomposing the sodium aluminate solution until the molar ratio of the sodium solution reaches 1.8-2.6, adding to the resulting partially decomposed sodium aluminate slurry the other stream of sodium aluminate solution, which has been cooled to a temperature low enough to lower the temperature of the partially decomposed sodium aluminate slurry by at least 3.degree. C., and the remaining portion of recycle seed aluminum hydroxide, and then further decomposing the cooled and mixed sodium aluminate slurry until the molar ratio of the sodium aluminate slurry reaches 2.6-4.0. The resulting coarse grains of aluminum hydroxide have a high resistance to disintegration to fine powder when calcined.
摘要翻译：通过将通过拜耳法制备的过饱和铝酸钠溶液除以铝酸钠溶液的高收率经济地生产氢氧化铝粗颗粒，并且将Na 2 O作为苛性钠与Al 2 O 3在小于1.8的溶液中的摩尔比分成两股料流，将一部分再循环种子氢氧化铝和细晶粒的氢氧化铝作为种子加入到铝酸钠溶液之一中，部分分解铝酸钠溶液直到钠溶液的摩尔比达到1.8-2.6，加入部分分解的铝酸钠将另一个铝酸钠溶液浆液冷却至足够低的温度，将部分分解的铝酸钠浆料的温度降低至少3℃，剩余部分再循环种子氢氧化铝，然后进一步分解冷却和混合的铝酸钠浆料，直到麦芽的摩尔比铝酸盐浆料达到2.6-4.0。得到的氢氧化铝粗颗粒在煅烧时具有高的崩解分解成细粉末的能力。

3. 发明授权

US4263261A Method for the removal of impurities from sodium aluminate solution 失效
标题翻译：从铝酸钠溶液中除去杂质的方法
公开(公告)号：US4263261A
公开(公告)日：1981-04-21
申请号：US103349
申请日：1979-12-13
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
IPC分类号： C01F7/47 , C01F7/06
CPC分类号： C01F7/473 , C01F7/47
摘要： Impurities such as organic substances, i.e. sodium oxalate and inorganic impurities, i.e. sodium salts of vanadium and phosphorus or double salts containing the latter sodium salts are removed from a sodium aluminate solution in the production of alumina from bauxite according to the Bayer process by adding sodium oxalate crystals or both sodium oxalate crystals and at least one of sodium salts of vanadium and phosphorus, or double salts containing the latter sodium salts as seed to the sodium aluminate solution in the course of after the precipitation step of aluminum hydroxide to before the digestion step, thereby precipitating crystals of said impurities, separating the crystals of said impurities from the sodium aluminate solution, dissolving about 10 to 50% by weight of the amount of the newly precipitated organic substances from the separated crystals of said impurities in an aqueous unsaturated sodium oxalate solution, and recyclically using the crystals resulting from the dissolution together with the resulting solution as seed for the precipitation of the impurities in the sodium aluminate solution. The impurities can be simply and effectively removed.
摘要翻译：根据拜耳方法，从铝矾土生产氧化铝中的铝酸钠溶液中除去有机物质，如草酸钠和无机杂质，即含有钒和磷的钠盐，或含有后钠盐的双盐等杂质，草酸盐晶体或草酸二钠晶体和钒和磷的钠盐中的至少一种，或在氢氧化铝在消化步骤之前的沉淀步骤之后，将含有后者钠盐作为种子的双重盐加入到铝酸钠溶液中从而使所述杂质的晶体析出，从铝酸钠溶液中分离出所述杂质的晶体，将来自所述杂质的分离晶体的新沉淀的有机物的量溶解在不饱和草酸钠水溶液中约10〜50重量％溶液，并循环使用由此产生的晶体与所得溶液一起作为用于沉淀铝酸钠溶液中的杂质的种子。可以简单有效地除去杂质。

4. 发明授权

US4364919A Process for producing coarse grains of aluminum hydroxide 失效
标题翻译：生产氢氧化铝粗颗粒的方法
公开(公告)号：US4364919A
公开(公告)日：1982-12-21
申请号：US347546
申请日：1982-02-10
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
IPC分类号： C01F7/04 , C01F7/14
CPC分类号： C01F7/147 , C01F7/144 , C01P2004/61
摘要： Coarse grains of aluminum hydroxide having high resistance to disintegration to powder in a calcination step are continuously produced from a supersaturated sodium aluminate solution of the Bayer process through(1) a first precipitation step of adding recycle seed aluminum hydroxide to a supersaturated sodium aluminate solution having a molar ratio of Na.sub.2 O as caustic soda to Al.sub.2 O.sub.3 in solution of less than 1.8 supplied to a precipitation tank of substantially complete mixing type in a ratio of 30-150 kg of the recycle seed to 1 m.sup.3 of the solution, thereby partially decomposing the seed-added solution until the molar ratio of the solution reaches 2.0-2.4 while keeping the solution at 65.degree.-80.degree. C.;(2) a second precipitation step of supplying the resulting sodium aluminate solution in a slurry state from the first precipitation step to at most three precipitation tanks of growth type arranged in series and decomposing the solution in the slurry state until the molar ratio reaches at least 2.6 while keeping the solution in the slurry state at a precipitated solid aluminum hydroxide concentration of 400-1,500 g/l and at a slurry temperature of 45.degree.-65.degree. C. in the precipitation tanks of growth type, and(3) a third step of supplying the decomposed solution in a slurry state from the second precipitation step to a classifier, thereby classifying the precipitated aluminum hydroxide grains into coarse grains of aluminum hydroxide as product and fine grains of aluminum hydroxide, and recycling the fine grains of aluminum hydroxide as seed.
摘要翻译：通过（1）将再循环种子氢氧化铝加入到过饱和的铝酸钠溶液中的第一沉淀步骤，由拜耳法的过饱和铝酸钠溶液连续地生产在煅烧步骤中具有高抗崩解粉末性的氢氧化铝的粗颗粒，以低于1.8的溶液中的Na 2 O与Al 2 O 3的摩尔比以小于1.8的比例提供给基本上完全混合的沉淀槽，比例为30-150kg的再循环种子与1m 3的溶液，从而部分分解种子直到溶液的摩尔比达到2.0-2.4，同时保持溶液在65-80℃。（2）第二沉淀步骤，将所得到的铝酸钠溶液从浆液状态从第一沉淀步骤供给到至少三个串联排列的生长型沉淀池，并以浆液状态分解溶液直到摩尔比达到至少 2.6，同时在析出的固态氢氧化铝浓度为400-1,500g / l，浆液温度为45-65℃，在生长型沉淀池中保持浆液状态，（3）第三将分解溶液从第二沉淀步骤供应到分级器的步骤，从而将沉淀的氢氧化铝颗粒分级为氢氧化铝的粗晶粒作为氢氧化铝的产物和细晶粒，并将氢氧化铝的细晶粒再循环种子。

5. 发明授权

US4426363A Process for extracting alumina from aluminous ores 失效
标题翻译：从铝土矿中提取氧化铝的方法
公开(公告)号：US4426363A
公开(公告)日：1984-01-17
申请号：US349666
申请日：1982-02-17
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato , Yasumi Shiozaki
IPC分类号： C01F7/06 , C01F7/46 , C01F7/47
CPC分类号： C01F7/47 , C01F7/06 , C01F7/062 , C01F7/46
摘要： In the production of alumina from aluminous ores containing alumina trihydrate and alumina monohydrate comprising a first-stage digestion by digesting alumina trihydrate from a slurry of the ores and a caustic solution and separating the resulting slurry into a caustic aluminate solution and an insoluble residue, and a second-stage digestion by digesting alumina monohydrate from a slurry of the insoluble residue separated in the first-stage digestion and a caustic solution, the present invention provides an improvement wherein scale formation onto a preheater for the slurry in the second-stage digestion is completely or substantially prevented and reduction in heat transfer coefficient of heat transfer surface is remarkably lowered. The improvement is attained by setting up a desilication reaction zone in the course of the first-stage digestion, whereby the slurry introduced into said zone is subjected to desilication reaction treatment.
摘要翻译：在含有氧化铝三水合物和氧化铝一水合物的含铝矿石中生产氧化铝，其包括通过从矿石浆料和苛性碱溶液中消化三水合氧化铝进行第一阶段消化，并将所得浆料分离成苛性铝酸盐溶液和不溶性残渣，以及通过在第一阶段消化中分离的不溶性残渣的浆料和苛性碱溶液中消化氧化铝一水合物进行第二阶段消化，本发明提供了一种改进，其中在第二阶段消化中用于浆料的预热器上的结垢为完全或基本上防止了传热表面的传热系数的降低。通过在第一阶段消化过程中设置脱盐反应区来实现改善，由此将引入所述区域的浆料进行脱硅反应处理。

6. 发明授权

US4421615A Process for producing metallic gallium 失效
标题翻译：金属镓的制造方法
公开(公告)号：US4421615A
公开(公告)日：1983-12-20
申请号：US421838
申请日：1982-09-23
申请人： Koichi Yamada , Takuo Harato , Yasuo Shinya , Hisakatsu Kato
发明人： Koichi Yamada , Takuo Harato , Yasuo Shinya , Hisakatsu Kato
IPC分类号： C22B58/00 , C25C1/22
CPC分类号： C22B58/00
摘要： A highly efficient process for producing metallic gallium from a gallium containing alkali aluminate solution circulating in the Bayer process is disclosed. The process comprises subjecting an alkali aluminate solution to electrolysis, said solution being obtained by (1) cooling an alkali aluminate solution after the aluminum hydroxide separation step in the Bayer process in the presence or absence of at least one, as a seed, alkali salt of an element selected from vanadium and phosphorus, or complexes containing the alkali salt, in order to precipitate crystals of impurities containing vanadium, phosphorus, etc. in the solution; removing the precipitates; and then subjecting the resulting alkali aluminate solution to oxidation treatment; or by (2) subjecting an alkali aluminate solution after the aluminum hydroxide separation step in the Bayer process to oxidation treatment; cooling the resulting liquor in the presence or absence of at least one, as a seed, alkali salt of an element selected from vanadium and phosphorus, or complexes containing the alkali salt, in order to precipitate crystals of impurities containing vanadium, phosphorus, etc. in the liquor; and then removing the precipitates.
摘要翻译：公开了一种用于在拜耳法中循环的含镓铝酸盐溶液中生产金属镓的高效方法。该方法包括使碱金属铝酸盐溶液进行电解，所述溶液通过以下步骤获得：（1）在拜耳法中的氢氧化铝分离步骤之后，在存在或不存在至少一种作为种子的碱金属盐的情况下，冷却碱金属铝酸盐溶液的选自钒和磷的元素，或含有碱金属盐的络合物，以便在溶液中沉淀含有钒，磷等杂质的晶体; 去除沉淀物; 然后将所得碱金属铝酸盐溶液进行氧化处理; 或者（2）在拜耳法中的氢氧化铝分离步骤之后对碱金属铝酸盐溶液进行氧化处理; 在存在或不存在至少一种作为种子的选自钒和磷的元素的碱金属盐或含有碱金属盐的络合物的情况下，冷却所得到的液体，以便沉淀出含有钒，磷等的杂质晶体。在酒中然后除去沉淀物。

7. 发明授权

US4215094A Method for the removal of organic substances from alkali metal aluminate solution 失效
标题翻译：从碱金属铝酸盐溶液中去除有机物质的方法
公开(公告)号：US4215094A
公开(公告)日：1980-07-29
申请号：US11568
申请日：1979-02-12
申请人： Jun-ichi Inao , Koichi Yamada , Takuo Harato , Hisakatsu Kato
发明人： Jun-ichi Inao , Koichi Yamada , Takuo Harato , Hisakatsu Kato
IPC分类号： B01J21/00 , B01J27/00 , C01F7/47 , C01F7/06 , C01F7/46
CPC分类号： C01F7/476
摘要： In the production of alumina from bauxite by the Bayer process, the present invention provides an improvement for effectively and economically removing organic substances from a circulating alkali aluminate solution by contacting the aluminate solution containing organic substances with molecular oxygen gas or a molecular oxygen-containing gas in the presence of copper ions as a catalyst at an elevated temperature, thereby oxidizing the organic substances, adding a chemical substance to the resulting aluminate solution which reacts with copper ions to deposit a water-insoluble precipitate, and separating the precipitate from the solution, and recycling the precipitate as a copper source to the above-mentioned wet oxidation procedure.
摘要翻译：在通过拜尔法从铝土矿生产氧化铝的过程中，本发明通过使含有机物的铝酸盐溶液与分子氧气或含分子氧的气体接触来提供有效和经济地从循环碱金属铝酸盐溶液中除去有机物质的改进在升高的温度下作为催化剂的铜离子存在下，由此氧化有机物质，向与铜离子反应的所得铝酸盐溶液中加入化学物质以沉积不溶于水的沉淀物，并将沉淀物与溶液分离，并将作为铜源的沉淀物再循环到上述湿氧化过程中。

8. 发明授权

US4201749A Method for the separation of precipitated aluminum hydroxide from sodium aluminate solution 失效
标题翻译：从铝酸钠溶液中分离析出的氢氧化铝的方法
公开(公告)号：US4201749A
公开(公告)日：1980-05-06
申请号：US37145
申请日：1979-05-08
申请人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
发明人： Koichi Yamada , Takuo Harato , Hisakatsu Kato
IPC分类号： C01F7/14 , C01F7/46
CPC分类号： C01F7/46 , C01F7/144 , C01F7/148
摘要： In the production of alumina from aluminous ores by the Bayer process, the present invention provides an improvement for effectively and economically recovering caustic components consisting essentially of sodium aluminate from aluminum hydroxide cakes as seed classified from the product aluminum hydroxide by washing the seed with a washing liquor having a substantially saturated concentration of sodium oxalate and little content of caustic and then removing organic substances such as sodium oxalate from the washed seed by secondly washing said seed with hot water, thereby recovering caustic components without the dissolution of sodium oxalate from the seed into the recovered caustic solution and attaining the removal of sodium oxalate contaminant with high efficiency.
摘要翻译：在通过拜尔法从铝矿石生产氧化铝的过程中，本发明提供了一种改进，以有效和经济地回收由氢氧化铝蛋白质基本上由铝酸钠组成的苛性碱组分，作为从产品氢氧化铝分类的种子，通过用洗涤洗涤种子具有基本上饱和的草酸钠浓度并且几乎不含苛性碱的液体，然后通过用热水二次洗涤所述种子从洗涤的种子中除去有机物质如草酸钠，从而回收苛性组分，而不将草酸钠从种子中溶解成回收的苛性碱溶液，高效除草草酸盐污染物。

9. 发明授权

US07704465B2 Aluminum hydroxide aggregated particles producing vessel 失效
标题翻译：氢氧化铝凝集颗粒生产容器
公开(公告)号：US07704465B2
公开(公告)日：2010-04-27
申请号：US10289429
申请日：2002-11-07
申请人： Hisakatsu Kato , Masashi Wada , Naoyuki Eguchi , Hirofumi Sasaki
发明人： Hisakatsu Kato , Masashi Wada , Naoyuki Eguchi , Hirofumi Sasaki
IPC分类号： B01J19/18
CPC分类号： B01F7/00208 , B01F7/00641 , B01F7/1675 , B01F7/22 , B01F15/00837 , B01F2215/0431 , B01F2215/044 , B01F2215/0472 , B01F2215/0477 , B01J19/006 , B01J19/0066 , B01J19/1812 , B01J2219/00768 , C01F7/02 , C01F7/14 , C01F7/144 , C01F7/147 , C01P2004/50 , C01P2004/61 , C01P2006/60 , C09C1/407 , Y10T428/2982
摘要： Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 μm, an average particle diameter as determined after pressing at 1,000 kg/cm2 of not more than 35 μm, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.
摘要翻译：平均粒径为40μm以上的氢氧化铝凝集粒子，1000kg / cm 2以上压制后测定的平均粒径为35μm以下，通过将20ml甘油和10g不超过69的氢氧化铝凝集颗粒，通过包括以下步骤的方法获得：（a）将过饱和的铝酸钠水溶液进料到容器中，（b）将氢氧化铝种子加入到过饱和水溶液铝酸钠溶液，（c）在容器中搅拌添加种子的溶液，同时连续向容器中加入过饱和的铝酸钠水溶液以水解过饱和的铝酸钠水溶液，（d）将氢氧化铝凝集颗粒与水溶液铝酸钠溶液，和（e）将铝酸钠水溶液连续排出容器。

10. 发明授权

US06382538B1 Method for manufacturing aluminum hydroxide powder 有权
标题翻译：氢氧化铝粉末的制造方法
公开(公告)号：US06382538B1
公开(公告)日：2002-05-07
申请号：US09576953
申请日：2000-05-24
申请人： Satoru Nippa , Toshiyuki Mizoe , Hisakatsu Kato
发明人： Satoru Nippa , Toshiyuki Mizoe , Hisakatsu Kato
IPC分类号： B02C1912
CPC分类号： C09C1/407 , C01F7/023 , C01P2004/61 , C01P2006/12 , C01P2006/19 , C01P2006/82
摘要： The present invention provides a method for manufacturing aluminum hydroxide powder highly fillable in a resin as a filler, comprising the step of grinding raw aluminum hydroxide using a kneader mixer.
摘要翻译：本发明提供一种高度填充在作为填料的树脂中的氢氧化铝粉末的制造方法，包括使用捏合机研磨氢氧化铝原料的工序。

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