公开(公告)号：US4155984A

公开(公告)日：1979-05-22

申请号：US733858

申请日：1976-10-19

申请人： Joseph Cohen ,  Alain Adjemian

发明人： Joseph Cohen ,  Alain Adjemian

IPC分类号： C01B17/90 ,  C01G23/00

CPC分类号： C01B17/901

摘要： Process for the recovery of H.sub.2 SO.sub.4 from dilute sulfuric acid solutions containing combined acid sulfates by heating these solutions in the presence of excess ammonium sulfate to a temperature from between about 100.degree. and 160.degree. C. until a concentration of free H.sub.2 SO.sub.4 between 50 and 59% by weight is obtained to precipitate the combined acid sulfates.

摘要翻译： 通过在过量的硫酸铵存在下将这些溶液加热至约100至160℃的温度，直至浓度为50至59％之间的游离H 2 SO 4浓度，从含有组合酸式硫酸盐的稀硫酸溶液中回收H 2 SO 4的方法， ，以沉淀出合并的酸式硫酸盐。

公开(公告)号：US4177242A

公开(公告)日：1979-12-04

申请号：US876205

申请日：1978-02-09

申请人： Joseph Cohen ,  Alain Adjemian

发明人： Joseph Cohen ,  Alain Adjemian

IPC分类号： C01F7/26 ,  C01F7/74 ,  C01F7/20 ,  C01G15/00 ,  C22B21/00

CPC分类号： C01F7/26 ,  C01F7/74

摘要： A method of obtaining alumina of high purity from aluminous mineral containing impurities by attacking the mineral with a sulphuric acid liquor and separating the resulting liquor from a residue which remains after the attack, the steps of(a) mixing the resulting liquor with a liquor containing HCl and H.sub.2 SO.sub.4,(b) introducing HCl gas into the mixture,(c) cooling the mixture from step (b) to precipitate hydrated aluminum chlorosulphate crystals having the formula AlSO.sub.4 Cl.6-7H.sub.2 O,(d) separating the hydrated crystals of hydrated aluminum chlorosulphate from the mother liquor,(e) heating the separated crystals to a temperature that does not exceed 600.degree. C. to yield a mixture of aluminum sulphates and hydrochloric gases,(f) thermally decomposing the aluminum sulphates to yield alumina of high purity and sulphuric gases,(g) degassing the mother liquor of step (c) to yield HCl gas,(h) concentrating the mother liquor from step (f),(i) freeing the concentrate from impurities, and(j) recycling the mother liquor from step (h) to the attack on the aluminous mineral.

摘要翻译： 一种通过用硫酸液攻击矿物质从含有杂质的含铝矿物中获得高纯度的氧化铝的方法，并将得到的液体与攻击后残留的残余物分离，（a）将所得液体与含有 HCl和H 2 SO 4，（b）将HCl气体引入到混合物中，（c）冷却步骤（b）的混合物以沉淀出具有式AlSO 4 Cl 6·7H 2 O的水合的氯化硫酸铝晶体，（d）分离水合铝的水合晶体 （e）将分离的晶体加热到不超过600℃的温度以产生硫酸铝和盐酸气体的混合物，（f）热分解硫酸铝以产生高纯度的氧化铝，以及 硫酸气体，（g）脱气步骤（c）的母液以产生HCl气体，（h）浓缩步骤（f）的母液，（i）将浓缩物从杂质中释放，和（j） 将母液从步骤（h）循环到对铝矿的攻击。

公开(公告)号：US4124680A

公开(公告)日：1978-11-07

申请号：US876206

申请日：1978-02-09

申请人： Joseph Cohen ,  Alain Adjemian

发明人： Joseph Cohen ,  Alain Adjemian

IPC分类号： C01F7/20 ,  C01F7/26 ,  C01F7/56 ,  C01F7/22

CPC分类号： C01F7/26 ,  C01F7/20

摘要： A method of obtaining alumina of high purity from aluminous mineral containing impurities in which the mineral is attacked with a sulphuric acid liquor followed by separation of a liquid phase from the resulting solid residue comprising(1) mixing the liquid phase with a liquor containing HCl and H.sub.2 SO.sub.4 at elevated temperature,(2) cooling the mixture with the precipitation of hydrated aluminum chlorosulphate having the formula AlSO.sub.4 Cl.6- 7H.sub. 2 O,(3) separating the precipitate from the remaining liquor which contains the major part of the impurities in solution,(4) suspending the separated precipitate in a hydrochloric acid liquor,(5) chlorinating the suspension by introduction of gaseous HCl with precipitation of AlCl.sub.3.6H.sub. 2 O,(6) separating the precipitated AlCl.sub.3.6H.sub. 2 O, and(7) pyrolizing the separated precipitate to produce alumina of high purity and gaseous HCl.

摘要翻译： 从含有杂质的含铝矿物中获得高纯度的氧化铝的方法，其中矿物质用硫酸液体侵蚀，然后从所得固体残渣中分离出液相，包括（1）将含有HCl的液体与液相混合， H2SO4在升高的温度下，（2）用具有配方AlSO 4 Cl 6 -7H 2 O的水合氯化铝的沉淀物冷却混合物，（3）将沉淀物与含有溶液中主要部分杂质的剩余液体分离， 4）在氢氯酸液中悬浮分离的沉淀物，（5）用AlCl 3·6H 2 O沉淀引入气相色谱法沉淀悬浮液，（6）分离沉淀的AlCl3·6H2O，（7）将分离的沉淀物 生产高纯度和盐酸的氧化铝。

公开(公告)号：US4241030A

公开(公告)日：1980-12-23

申请号：US35439

申请日：1979-05-08

申请人： Joseph Cohen ,  Alain Adjemian ,  Michel Ferran

发明人： Joseph Cohen ,  Alain Adjemian ,  Michel Ferran

IPC分类号： C01F7/20 ,  C01F7/26 ,  C01F7/22

CPC分类号： C01F7/20 ,  C01F7/26

摘要： A process for obtaining pure alumina comprising the combination of chlorosulphuric attack of calcined aluminous ores containing impurities, followed by concentration of the liquor obtained after the attack and separation of the sterile material, sulphuric acid treatment of the concentrated liquor followed by chlorination to precipitate almost all the hexahydrated aluminum chloride, separation of the precipitate of hexahydrated aluminum chloride and of the chlorosulphuric mother liquor charged with impurities, pyrohydrolysis of the precipitate to give the desired pure alumina with recycling of released hydrochloric acid, degassing of the chlorosulphuric liquor of impurities with recycling of the gaseous HCl for chlorination, yielding a sulphuric liquor of impurities, finally the elimination of the impurities present in this latter liquor in the form of a sulphuric precipitation by concentration in the presence of potassium ions.

摘要翻译： 一种获得纯氧化铝的方法，其中包含含有杂质的煅烧铝矿石的氯硫化反应的组合，然后浓缩在攻击后获得的液体和无菌材料的分离，硫酸处理浓缩液体，接着氯化沉淀几乎所有 六水氯化铝，六水氯化铝沉淀物和带有杂质的氯硫母液的分离，将沉淀物进行热水解，得到所需的纯氧化铝，再循环释放的盐酸，将氯磺酸的杂质脱气回收 用于氯化的气态HCl，产生杂质的硫酸液，最后通过在钾离子存在下浓缩，以后者液体中存在的杂质以硫酸沉淀的形式消除。

公开(公告)号：US4237102A

公开(公告)日：1980-12-02

申请号：US35440

申请日：1979-05-08

申请人： Joseph Cohen ,  Alain Adjemian

发明人： Joseph Cohen ,  Alain Adjemian

IPC分类号： C01F7/22 ,  C01F7/30 ,  C01F7/56 ,  C01F7/26

CPC分类号： C01F7/306 ,  C01F7/22 ,  C01P2006/80

摘要： A cyclic process for obtaining very pure alumina by the hydrochloric acid attack of a silico-aluminous material, the said process comprising, in a first stage, the precipitation of at most 75% of the alumina present in the liquor originating from the attack in the form of hexahydrated aluminum chloride which is subsequently decomposed by heating, then, in a second stage, the treatment of the liquor leaving the first stage with HCl gas in order to precipitate dissolved Al.sub.2 O.sub.3 in the form of hexahydrated aluminum chloride which is recycled into the liquor leaving the attack, while the hydrochloric liquor leaving the second stage and impoverished in Al.sub.2 O.sub.3 but rich in impurities, is treated with a recycled sulphuric liquor in order to precipitate impurities as their corresponding sulphates.

摘要翻译： 用于通过硅铝酸盐材料的盐酸侵蚀获得非常纯的氧化铝的循环方法，所述方法包括在第一阶段中沉淀出至少75％的来自于在 六水氯化铝的形式，其随后通过加热分解，然后在第二阶段中，用HCl气体处理离开第一阶段的液体，以便将六水氯化铝的溶解的Al 2 O 3沉淀，将其再循环到液体中 留下攻击，而离开第二阶段并在Al2O3中贫瘠，但富含杂质的盐酸溶液用再循环的硫酸溶液处理，以便将杂质沉淀为相应的硫酸盐。