公开(公告)号：US20240059577A1

公开(公告)日：2024-02-22

申请号：US18242376

申请日：2023-09-05

Applicant: Alcoa of Australia Limited

Inventor： Robert Joseph Lamacchia

IPC: C01F7/306 ,  B01D9/00 ,  C01F7/62

CPC classification number: C01F7/306 ,  B01D9/0036 ,  C01F7/62 ,  B01D2009/0086 ,  C01P2006/80

Abstract: A process for preparing high purity alumina from aluminium-bearing materials is provided. The process digesting an aluminium bearing material to provide an aluminium chloride liquor, a first crystallisation vessel for crystallising aluminium chloride hexahydrate solids from the aluminium chloride liquor, optionally one or more subsequent crystallisation vessels for dissolving and recrystallising the aluminium chloride hexahydrate solids, and thermal treatment means for thermally treating the aluminium chloride hexahydrate solids to provide high purity alumina.

公开(公告)号：US4560541A

公开(公告)日：1985-12-24

申请号：US589927

申请日：1984-03-15

Applicant: Gerald E. Davis

Inventor： Gerald E. Davis

IPC: C01F7/30 ,  C01F7/46 ,  C01F7/47 ,  C01F7/56 ,  C01F7/62 ,  C01F7/22

CPC classification number: C01F7/56 ,  C01F7/47 ,  C01P2006/80

Abstract: A process is described for the formation of high purity alumina from aluminas such as Bayer Process alumina trihydrate (gibbsite) which contain both acid-soluble and -insoluble impurities, notably soda and silica. The solid hydrated alumina is reacted with a stoichiometric quantity of concentrated HCl to form a reaction product comprising of dissolved aluminum chloride and solid aluminum chloride hexahydrate (ACH). The acid and/or aluminum chloride concentration of the solution is then adjusted (as by water addition) to dissolve the solid ACH and form a solution at or near saturation in aluminum chloride, but with the remaining solid materials undissolved. The solution is then subjected to solid/liquid separation to eliminate the insoluble impurities, such as silica. Thereafter, the concentration is again adjusted to cause the ACH to crystallize and precipitate preferentially to the soluble impurities, following which the ACH is recovered as a solid and calcined in a single or multistage calcination to high purity alumina. The purified products find use in the specialty ceramics field, as synthetic sapphire, translucent tubing or other applications in which alumina must meet SPA specifications.

Abstract translation: 描述了从氧化铝形成高纯度氧化铝的方法，例如含有酸溶性和不溶性杂质（特别是苏打和二氧化硅）的拜耳法三氧化三铝（三水铝矿）。 将固体水合氧化铝与化学计量的浓HCl反应以形成包含溶解的氯化铝和固体氯化铝六水合物（ACH）的反应产物。 然后调节溶液的酸和/或氯化铝浓度（如通过加水）以溶解固体ACH并在氯化铝中或接近饱和状态形成溶液，但剩余的固体物质未溶解。 然后将溶液进行固/液分离以消除不溶性杂质，例如二氧化硅。 此后，再次调节浓度使ACH结晶并优先析出为可溶性杂质，随后将ACH作为固体回收，并在单次或多次煅烧中煅烧成高纯度氧化铝。 纯化产品可用于专业陶瓷领域，如合成蓝宝石，半透明管材或氧化铝必须符合SPA规格的其他应用。

公开(公告)号：US4297327A

公开(公告)日：1981-10-27

申请号：US118602

申请日：1980-02-04

Applicant: Norvald Gjelsvik ,  Gunnar Hannestad ,  Ingleif Hundere ,  Jan H. Torgersen

Inventor： Norvald Gjelsvik ,  Gunnar Hannestad ,  Ingleif Hundere ,  Jan H. Torgersen

IPC: C01F7/30 ,  C01F7/56 ,  C01F7/62 ,  C01F7/22

CPC classification number: C01F7/56 ,  C01F7/306 ,  C01F7/62

Abstract: Method of producing aluminiumchloride with a low content of magnesium from hydrochloric acid solutions which contain ions of aluminium and magnesium and from which the aluminiumchloride is precipitated by hydrochloric gas and where the precipitation is carried out continuously in cascade so that the major part of the aluminium will be precipitated from solutions in which the ratio between aluminium and magnesium calculated as g Al.sup.+3 /g Mg.sup.+2 is above 0,5. Produced aluminiumchloride may be transformed to aluminiumoxide by calcination.

Abstract translation: 从含有铝和镁离子的盐酸溶液中生产低含量镁的氯化铝的方法，其中氯化铝由氯化氢沉淀，并且其中沉淀连续地级联进行，使得铝的主要部分 从其中以Al + 3 / g Mg + 2计算的铝和镁之比计算在0.5以上的溶液中析出。 产生的氯化铝可以通过煅烧转化为氧化铝。

公开(公告)号：US4083923A

公开(公告)日：1978-04-11

申请号：US651396

申请日：1976-01-22

Applicant: Alfred Lippman ,  Roger Frank Sebenik

Inventor： Alfred Lippman ,  Roger Frank Sebenik

IPC: C01F7/30 ,  C01B33/08 ,  C01F7/22 ,  C01F7/58 ,  C01F7/60 ,  C01F7/62 ,  C01G49/10 ,  C22B34/12 ,  C01F7/02

CPC classification number: C22B34/1222 ,  C01B33/08 ,  C01F7/22 ,  C01F7/60 ,  C01F7/62 ,  C01G49/10 ,  Y02P10/23 ,  Y10S423/12

Abstract: The present invention provides a process for the production of aluminum chloride and alumina of metallurgical grade purity, and valuable by-products from aluminous ores like clay, bauxites and laterites. The process comprises carbo-chlorination of the ore to produce aluminum chloride and other metal chlorides. The aluminum chloride is separated, purified and utilized as such or oxidized to make alumina while the other metal chlorides are processed to recover maximum values.

Abstract translation: 本发明提供一种生产冶金级纯度的氯化铝和氧化铝的方法，以及来自诸如粘土，铝土矿和红土的铝土矿的有价值的副产物。 该方法包括对该矿石进行碳氯化以产生氯化铝和其它金属氯化物。 氯化铝被分离，纯化并如此使用或氧化以制备氧化铝，而其它金属氯化物被处理以恢复最大值。

公开(公告)号：US4029750A

公开(公告)日：1977-06-14

申请号：US500757

申请日：1974-08-26

Applicant: Ronald C. Schoener ,  Larry K. King ,  Lester L. Knapp ,  Nicholas Kloap

Inventor： Ronald C. Schoener ,  Larry K. King ,  Lester L. Knapp ,  Nicholas Kloap

IPC: B01D7/00 ,  B01D7/02 ,  C01F7/00 ,  C01F7/56 ,  C01F7/58 ,  C01F7/60 ,  C01F7/62

CPC classification number: C01F7/58 ,  C01F7/60 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/20 ,  C01P2006/80 ,  Y10S423/16

Abstract: Method and apparatus for directly desubliming gaseous aluminum chloride to solid form in a fluidized bed of solid particles of aluminum chloride at controlled temperatures for production of selectively constituted solid particulate aluminum chloride.

Abstract translation: 用于在控制温度下在氯化铝的固体颗粒的流化床中将气态氯化铝直接稀释成固体形式的方法和装置，用于生产选择性构成的固体颗粒状氯化铝。

公开(公告)号：US3842163A

公开(公告)日：1974-10-15

申请号：US17808071

申请日：1971-09-07

Applicant: ALUMINUM CO OF AMERICA

Inventor： RUSSELL A ,  STOUP P ,  JARRETT N ,  BURRELL L

IPC: B01D7/00 ,  B01D7/02 ,  C01F7/00 ,  C01F7/56 ,  C01F7/58 ,  C01F7/60 ,  C01F7/62 ,  C22B1/08 ,  C22B1/10

CPC classification number: B01D7/02 ,  C01F7/58 ,  C01F7/60 ,  C01F7/62 ,  C01P2004/03 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/20 ,  C01P2006/80 ,  Y10S264/19 ,  Y10T428/2982

Abstract: 1. PROCESS FOR THE PRODUCTION OF ALUNIMUM CHLORIDE WHICH COMPRISES REACTING CHLORINE AT A TEMPERATURE OF BETWEEN ABOUT 450*-800* C. WITH ALUMINA HAVING AN AVERAGE ALPHA ALUMINA BEING INTERMIXED WITH CARBON AND WEIGHT AND AN AVERAGE SURFACE AREA OF AT LEAST ABOUT10 M.2/G., SAID ALUMINA BEING INTERMIXED WITH CARBON AND COMPOSITELY HAVING AN AVERAGE HYDROGEN CONTENT OF LESS THAN ABOUT 0.5% BY WEIGHT AND AN AVERAGE CARBON CONTENT OF ABOUT 15-24% BY WEIGHT BASED ON THE TOTAL ALUMINA, CARBON AND HYDROGEN CONTENTS PRESENT, TO FORM A GASEOUS EFFLUENT CONTAINING ALUMINUM CHLORIDE AND CARBON OXIDES IN WHICH AT LEAST ABOUT 25% BY WEIGHT OF SUCH CARBON OXIDES IS CARBON DIOXIDE, AND RECOVERING THE ALUMINUM CHLORIDE FROM THE GASEOUS EFFLUENT.

公开(公告)号：US3832452A

公开(公告)日：1974-08-27

申请号：US34977973

申请日：1973-04-10

Applicant: CROUCH D

Inventor： CROUCH D

IPC: C01F7/62 ,  H01M6/36 ,  H01M11/00 ,  H01M9/00

CPC classification number: C01F7/62 ,  H01M6/36 ,  Y10S423/12

Abstract: Purification of anhydrous aluminum chloride in an alkaline metal chloride-aluminum chloride melt can be effected in situ by the addition of solid alkali metal to the melt.

Abstract translation: 碱性金属氯化物 - 氯化铝熔体中的无水氯化铝的纯化可以通过在熔体中加入固体碱金属进行原位实现。

公开(公告)号：US3406010A

公开(公告)日：1968-10-15

申请号：US48585865

申请日：1965-09-08

Applicant: ANACONDA CO

Inventor： HOLDERREED FRANCIS L ,  SULLIVAN ROBERT E

IPC: C01F7/56 ,  C01F7/62

CPC classification number: C01F7/62 ,  C01F7/56

公开(公告)号：US3341283A

公开(公告)日：1967-09-12

申请号：US55056666

申请日：1966-05-16

Applicant: BRITISH TITAN PRODUCTS

Inventor： DENIS CLEAVER ,  DENNIS HERRIMAN JOHN

IPC: C01F7/58 ,  C01F7/62 ,  C22B21/06

CPC classification number: C01F7/62 ,  C01F7/58 ,  C22B21/064

公开(公告)号：US1520080A

公开(公告)日：1924-12-23

申请号：US54253722

申请日：1922-03-10

Applicant: GULF REFINING CO

Inventor： PRICHARD GEORGE L ,  HERBERT HENDERSON

IPC: C01F7/62

CPC classification number: C01F7/62