公开(公告)号：US6056813A

公开(公告)日：2000-05-02

申请号：US211693

申请日：1998-12-14

Applicant: John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox ,  Fred A. Aiken, III

Inventor： John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox ,  Fred A. Aiken, III

IPC: C09D7/12 ,  D21H17/67 ,  D21H21/52 ,  C09C1/40 ,  C09D17/00

CPC classification number: C09D7/1216 ,  D21H17/67 ,  D21H21/52

Abstract: A process for making white pigment directly from constituent materials without byproducts. The process comprises the steps of inputting three material flows comprising a sulphate source, an alkali source, and an aluminum source. And, recycling and mixing into the three material flows a process return from a separation and wash stage and vapors from a pressure let-down stage. This is followed by heating and holding a mixture of recycled process returns and the three material flows at elevated pressure in a reactor for a minimum predetermined residence time. Afterwards, letting down pressure in a flow from the reactor to produce a pre-wash flow. Then, separating, classifying, and delaminating the pre-wash flow into a first and second pigment or filler that are differentiated by their respective average particle distribution sizes.

Abstract translation: 直接从构成材料制备白色颜料而不产生副产物的方法。 该方法包括输入包括硫酸盐源，碱源和铝源的三种物料流的步骤。 并且，回收和混合到三种材料中流动从分离和洗涤阶段返回的过程以及来自压力下降阶段的蒸气。 然后在反应器中加热并保持再循环的处理返回和三个物料流在高压下的混合物达最小的预定停留时间。 之后，使来自反应器的流中的压力降低以产生预洗流。 然后，将预洗流分离，分级和分层成由它们各自的平均颗粒分布尺寸区别的第一和第二颜料或填料。

公开(公告)号：US5662880A

公开(公告)日：1997-09-02

申请号：US635322

申请日：1996-04-19

Applicant: John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

Inventor： John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

IPC: B01J21/04 ,  C01F7/32 ,  C01F7/02 ,  C22B13/00

CPC classification number: B01J21/04 ,  C01F7/32 ,  C01P2006/12 ,  C01P2006/80

Abstract: A method of making activated alumina includes beginning with a leach liquor of potassium and aluminum sulphates that is subjected to a surface-cooled crystallizer with a heat-exchanger input temperature of 160.degree. F. and a surface-chilled temperature of 60.degree. F. to 80.degree. F. Crystals of aluminum sulphate are precipitated and recrystalized by evaporation in a vacuum and at an elevated temperature. Purified crystals of aluminum sulphate are then dried at 50.degree.-60.degree. C. The dried aluminum sulphate crystals are then dehydrated at 400.degree.-450.degree. C. after a rise rate of 10.degree.-20.degree. C. per minute to drive off most of the water. A roasting and recalcination step at 900.degree. C.-950.degree. C. after a rise rate of 10.degree.-20.degree. C. per minute is used drive off the sulphate. The remaining alumina is useful as a high-grade catalyst.

Abstract translation: 制造活性氧化铝的方法包括从经过表面冷却结晶器的热交换器输入温度为160°F，表面冷却温度为60°F的硫酸钾和硫酸铝的浸出液开始。 80°F。硫酸铝的晶体通过在真空中和在高温下蒸发而沉淀并重结晶。 然后将硫酸铝的纯化晶体在50-60℃下干燥。然后将干燥的硫酸铝晶体在400-450℃下脱水，每分钟升温10℃至20℃，以驱除大部分 的水。 在每分钟10〜20℃的升温速度下，在900℃〜950℃下进行焙烧和重新煅烧步骤。 剩余的氧化铝可用作高级催化剂。

公开(公告)号：US5871571A

公开(公告)日：1999-02-16

申请号：US892524

申请日：1997-07-14

Applicant: John S. Rendall ,  Massoud Ahghar ,  David H. Fishman

Inventor： John S. Rendall ,  Massoud Ahghar ,  David H. Fishman

IPC: C01F7/76 ,  C09D11/02 ,  C01F7/74 ,  C09D11/00

CPC classification number: C09D11/03 ,  C01F7/762

Abstract: A process for making ink which begins with a leach liquor of Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +Fe.sub.2 SO.sub.4 and other sulfates that are introduced to a surface-cooled crystallizer that drops the Al.sub.2 (SO.sub.4).sub.3 +18H.sub.2 O which is removed from the leach liquor. The leach liquor is then supplied with a mixture which includes K.sub.2 SO.sub.4 into a simple crystallization and evaporation unit to drop Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +24H.sub.2 O. A pressure of 250 PSI and a temperature of 200.degree. C. are then applied in a discrete continuous process that yield a basic sodium or sodium/potassium aluminum sulfate and excess sodium sulfate or sodium/potassium. The excess sodium sulfate or sodium/potassium sulfate is returned to the simple crystallization and evaporation unit. The basic potassium aluminum sulfate (BKAS) and/or basic sodium aluminum sulfate (BNaAS) Na.sub.2 SO.sub.4, 3Al.sub.2 O.sub.3, 4SO.sub.3, 9H.sub.2 O is used as a filler in the making of ink.

Abstract translation: 一种制备油墨的方法，该方法开始于Al2（SO4）3 + K2SO4 + Fe2SO4和其他硫酸盐的浸出液，其被引入到表面冷却结晶器中，该结晶器将从浸出液中除去的Al 2（SO 4）3 + 18H 2 O 。 然后向浸出液中提供包含K 2 SO 4的混合物，成为简单的结晶和蒸发装置，从而降低Al2（SO4）3 + K2SO4 + 24H2O。 然后在离散的连续方法中施加250PSI的压力和200℃的温度，其产生碱式钠或钠/钾的硫酸铝和过量的硫酸钠或钠/钾。 过量的硫酸钠或硫酸钠/硫酸钾返回到简单的结晶和蒸发单元。 碱性硫酸铝钾（BKAS）和/或碱性硫酸铝钠（BNaAS）Na2SO4,3Al2O3,4SO3,9H2O用作油墨制备中的填料。

公开(公告)号：US5746932A

公开(公告)日：1998-05-05

申请号：US749167

申请日：1996-11-14

Applicant: John S. Rendall ,  Massoud Ahghar

Inventor： John S. Rendall ,  Massoud Ahghar

IPC: C04B14/10 ,  C04B20/02 ,  C04B30/00 ,  E04B1/74

CPC classification number: C04B14/10 ,  C04B20/023 ,  C04B30/00 ,  Y02W30/93

Abstract: A method of making low-density silica-alumina thermal insulation wherein sulfuric acid is used to leach clay fines from processed Athabasca oil sands. The treated fines are dried and roasted to produce a fine buff to white colored powder with particle sizes that range from forty microns to less than a micron. About 80% of these particles are less than twenty microns. The bulk density of this powder is about fifteen to thirty-five pounds to the cubic-foot (lb./ft.sup.3), compared to silica sand which has a bulk density of 150 lb./ft.sup.3, and alumina which is about 200 lb./ft.sup.3, depending on the grade and method of production.

Abstract translation: 一种制备低密度二氧化硅 - 氧化铝保温的方法，其中使用硫酸从加工的Athabasca油砂中浸出粘土细粉。 将经处理的细粉干燥并焙烧以产生细微的白色粉末，其粒度范围为40微米至小于1微米。 这些颗粒中约80％小于二十微米。 与立方英尺（lb./ft3）相比，该粉末的堆密度相对于堆积密度为150lb / ft 3的硅砂和约200lb的氧化铝，为约15至35磅。 / ft3，具体取决于生产的等级和方法。

公开(公告)号：US5865952A

公开(公告)日：1999-02-02

申请号：US74630

申请日：1998-05-07

Applicant: John S. Rendall ,  Massoud Ahghar

Inventor： John S. Rendall ,  Massoud Ahghar

IPC: C01F7/76 ,  D21H11/00 ,  D21H17/63 ,  D21H17/67 ,  D21H17/66

CPC classification number: C01F7/762 ,  D21H17/67 ,  C01P2004/61

Abstract: A process in which a leach liquor of Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +Fe.sub.2 SO.sub.4 and other sulphates is introduced to a surface-cooled crystallizer that drops the Al.sub.2 (SO.sub.4).sub.3 +18H.sub.2 O. The leach liquor is pumped through a heat exchanger that keeps a temperature of 160.degree. F. and the surface temperature of the surface-cooled crystallizer is maintained at 60.degree. F. The temperature gradient within the leach liquor promotes crystal formation. These crystals are then supplied to mixture which includes K.sub.2 SO.sub.4 in a simple crystallization and evaporation step that uses a vacuum of twenty inches of mercury and heat to drop Al.sub.2 (SO.sub.4).sub.3 +K.sub.2 SO.sub.4 +24H.sub.2 O. A pressure of 250 PSI and a temperature of 200.degree. C. are then applied in a discrete continuous process that yield a basic sodium or potassium aluminum sulphate and excess sodium sulphate or potassium. The excess sodium sulphate or potassium sulphate is returned to the simple crystallization and evaporation step. The basic sodium aluminum sulphate comprises particles that are at least forty percent below two micron. This is then applied to a delaminator that converts eighty-five percent of the particles to under two micron. The BKAS and/or BNaAS is used as a filler in the making of paper.

Abstract translation: 其中将Al 2（SO 4）3 + K 2 SO 4 + Fe 2 SO 4和其它硫酸盐的浸出液引入到降低Al 2（SO 4）3 + 18H 2 O的表面冷却结晶器中的方法。 浸出液通过保持温度为160°F的热交换器，表面冷却结晶器的表面温度保持在60°F。浸出液中的温度梯度促进晶体形成。 然后将这些晶体以简单的结晶和蒸发步骤提供到包括K 2 SO 4的混合物中，该步骤使用二十英寸汞柱的真空并加热以降低Al 2（SO 4）3 + K 2 SO 4 + 24H 2 O. 然后在离散的连续方法中施加250PSI的压力和200℃的温度，其产生碱式硫酸钠或钾的硫酸钠或过量的硫酸钠或钾。 过量的硫酸钠或硫酸钾回到简单的结晶和蒸发步骤。 碱性硫酸铝钠包括比二微米低至少百分之四十的颗粒。 然后将其应用于将百分之八十五的颗粒转化为二微米以下的分层机。 BKAS和/或BNaAS在纸的制作中被用作填料。

公开(公告)号：US5720868A

公开(公告)日：1998-02-24

申请号：US635321

申请日：1996-04-19

Applicant: John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

Inventor： John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

IPC: C01F7/32 ,  C01F7/74 ,  C25C3/06 ,  C01F1/00 ,  C01F7/02

CPC classification number: C01F7/32 ,  C01F7/748 ,  C25C3/06

Abstract: A method of making activated alumina includes beginning with a leach liquor of potassium and aluminum sulphates that is subjected to a surface-cooled crystallizer with a heat-exchanger input temperature of 160.degree. F. and a surface-chilled temperature of 60.degree. F. Crystals of aluminum sulphate are precipitated and recrystalized by evaporation in a vacuum and at an elevated temperature. Purified crystals of aluminum sulphate are then dried at 50.degree.-60.degree. C. The dried aluminum sulphate crystals are then dehydrated at 400.degree.-450.degree. C. after a rise rate of 50.degree.-60.degree. C. per minute to drive off most of the water. A roasting and recalcination step at 1000.degree. C.-1050.degree. C. after a rise rate of 50.degree.-60.degree. C. per minute is used drive off the sulphate. The remaining alumina is smelted by electrolysis for aluminum.

Abstract translation: 制造活性氧化铝的方法包括从经过表面冷却结晶器的热交换器输入温度为160°F，表面冷却温度为60°C的硫酸钾和硫酸铝浸出液开始。晶体 的硫酸铝沉淀并通过在真空中和在高温下蒸发而重结晶。 然后将硫酸铝的纯化结晶在50-60℃下干燥。然后将干燥的硫酸铝晶体在400-450℃下脱水，每分钟升温50-60℃，以驱除大部分 的水。 使用50℃-60℃/分钟的升高速率在1000℃-1050℃下进行焙烧和重新煅烧步骤。 剩余的氧化铝通过电解铝来熔炼。

公开(公告)号：US5589023A

公开(公告)日：1996-12-31

申请号：US429195

申请日：1995-04-26

Applicant: John S. Rendall ,  Massoud Ahghar

Inventor： John S. Rendall ,  Massoud Ahghar

IPC: B28B7/38 ,  C04B22/00 ,  C04B28/14 ,  C04B38/02 ,  B29C67/20

CPC classification number: B28B7/384 ,  C04B22/0066 ,  C04B28/14 ,  C04B38/02 ,  C04B2111/00612 ,  C04B2111/28 ,  C04B2111/56 ,  Y10S428/92 ,  Y10S428/921 ,  Y10T428/24273 ,  Y10T428/249967 ,  Y10T428/249968 ,  Y10T428/31996

Abstract: An insulation material comprising the double salt of aluminum potassium sulphate and method of producing such. Aluminum sulphate materials and potassium sulphate materials are combined to form aluminum potassium sulphate which is then dehydrated to remove the water of hydration. Porous forms are made by mixing the hydrated aluminum potassium sulphate with a binder before dehydration. The resultant dehydrated sulphate expands greatly to provide an insulative material which is of lightweight and inorganic.

Abstract translation: 一种绝缘材料，其包含硫酸铝钾的双重盐及其制备方法。 将硫酸铝材料和硫酸钾材料合并形成硫酸铝钾，然后脱水以除去水合水。 多孔形式通过在脱水之前将水合的硫酸铝钾与粘合剂混合而制成。 所得的脱水硫酸盐膨胀得很大，提供了一种重量轻且无机的绝缘材料。

公开(公告)号：US06447738B1

公开(公告)日：2002-09-10

申请号：US09648300

申请日：2000-08-24

Applicant: John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox ,  Fred A. Aiken

Inventor： John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox ,  Fred A. Aiken

IPC: C01F700

CPC classification number: C22B34/125 ,  C01D5/00 ,  C01F7/26 ,  C01G23/053 ,  C01G23/0532 ,  C01G49/06 ,  C22B3/08 ,  C22B21/0015 ,  Y02P10/234

Abstract: A process for the extraction of alumina, iron oxide and titanium dioxide from bauxite ore and clays, and other ore bodies and feedstocks. The process starts by sulfuric acid leaching of the feedstocks in pressure autoclaves at about 200° C. and appropriate pressure. A leach liquor of sulfate salts of aluminum, iron and titanium is obtained. Any iron values are converted to a ferrous state. A recycled potassium sulfate helps produce double aluminum alkali sulfate crystals in the reduced leach liquor. The crystals are removed at about 20°-60° C. with the help of SO2 gases that reduce the ferric. Such double salt is hydrolyzed into a basic aluminum alkali precipitated sulfate salt. This is then dried and calcined at about 950° C. Any alkali sulfate is washed out and recycled. The remainder is alumina. The ferrous sulfate is crystallized out at about 10° C. It is dried and calcined at about 450° C. to produce an iron oxide mixed with other sulfate salts that can be washed out and recycled.

Abstract translation: 从铝土矿和粘土以及其他矿体和原料中提取氧化铝，氧化铁和二氧化钛的方法。 该过程开始于在约200℃的压力高压釜中的原料硫酸浸出和适当的压力。 得到铝，铁和钛的硫酸盐的浸出液。 任何铁价值都转为有色金属。 回收的硫酸钾有助于在还原的浸出液中产生双重碱式硫酸铝晶体。 借助SO2气体，在约20°-60°C下除去晶体，减少三价铁。 这种双盐水解成碱式铝碱析出的硫酸盐。 然后将其干燥并在约950℃下煅烧。任何碱性硫酸盐被洗涤并再循环。 剩余部分是氧化铝。 硫酸亚铁在约10℃下结晶出来。将其干燥并在约450℃下煅烧以产生与其它硫酸盐混合的氧化铁，其可被洗涤和回收。

公开(公告)号：US5895523A

公开(公告)日：1999-04-20

申请号：US998410

申请日：1997-12-24

Applicant: John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox

Inventor： John S. Rendall ,  Massoud Ahghar ,  Jerry V. Fox

IPC: C01F7/76 ,  C09C1/40 ,  C09D17/00

CPC classification number: C01F7/762 ,  C09C1/40 ,  C01P2006/60

Abstract: A process is provided for making K.sub.2 SO.sub.4 3Al.sub.2 O.sub.3 4S0.sub.3 +xH.sub.2 O or Na.sub.2 SO.sub.4 3Al.sub.2 O.sub.3 4SO.sub.3 +xH.sub.2 O where x is a number from 4 to 12, which is used as a pigment. Sulfuric acid, one of a sulfate salt or a hydroxide of either potassium or sodium and one of a sulfate of aluminum or a hydroxide of aluminum are inputted into a crystallizer and reacted to form either Al.sub.2 (SO.sub.4).sub.3 K.sub.2 SO.sub.4 +24H.sub.2 O or Al.sub.2 (SO.sub.4).sub.3 Na.sub.2 SO.sub.4 +24H.sub.2 O. A fluid flow containing either Al.sub.2 (SO.sub.4).sub.3 K.sub.2 SO.sub.4 +24H.sub.2 O or Al.sub.2 (SO.sub.4).sub.3 Na.sub.2 SO.sub.4 +24H.sub.2 O is drawn off from the crystallizer and transferred into a pigment reactor where it is subjected to a temperature of about 200.degree. C. and a pressure ranging from 120 to 350 pounds per square inch so as to result in the production of either basic potassium aluminum sulfate K.sub.2 SO.sub.4 3Al.sub.2 O.sub.3 4SO.sub.3 +xH.sub.2 O or basic sodium aluminum sulfate Na.sub.2 SO.sub.4 3Al.sub.2 O.sub.3 4SO.sub.3 +xH.sub.2 O where x is a number from 4 to 12 which is further treated in a filtration step to obtain pigment solids and a mother liquor. A portion of the reaction mixture is bled off from the crystallizer in an amount that is inversely proportional to the purity of the materials inputted into the crystallizer and the mother liquor is recycled back to the crystallizer, so that this process is able to process and react starting materials that may be of relatively lower purity.

Abstract translation: 提供了制备K2SO4 3Al2O34SO3 + xH2O或Na2SO4 3Al2O3 4SO3 + xH2O的方法，其中x为4至12的数，用作颜料。 硫酸盐，钾盐或钠的氢氧化物和铝的一种硫酸盐或铝的氢氧化物之一被输入到结晶器中并反应以形成Al 2（SO 4）3 K 2 SO 4 + 24H 2 O或Al 2（SO 4） ）3 Na2SO4 + 24H2O。 含有Al 2（SO 4）3 K 2 SO 4 + 24H 2 O或Al 2（SO 4）3 Na 2 SO 4 + 24H 2 O的流体流从结晶器中排出并转移到颜料反应器中，在其中经受约200℃的温度和压力 范围为120至350磅/平方英寸，以便生产碱式硫酸钾钾K 2 SO 4 3Al 2 O 3 4SO 3 + xH 2 O或碱式硫酸钠钠Na 2 SO 4 3Al 2 O 3 4SO 3 + xH 2 O，其中x为4至12的数，进一步处理 在过滤步骤中获得颜料固体和母液。 将反应混合物的一部分从结晶器中以与输入结晶器的材料的纯度成反比并且母液循环回结晶器的量成反比，从而使该方法能够处理和反应 可能具有相对较低纯度的原料。

公开(公告)号：US5846512A

公开(公告)日：1998-12-08

申请号：US760344

申请日：1996-12-04

Applicant: John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

Inventor： John S. Rendall ,  Massoud Ahghar ,  Stephen J. Lane

IPC: C04B38/00 ,  B01J21/04 ,  B01J37/00 ,  C01F7/32 ,  C04B38/04 ,  C04B38/06

CPC classification number: C01F7/32 ,  C01P2006/12

Abstract: A method of making activated alumina including the steps of dissolving a double salt of aluminum in a solution of pure water at 85.degree. C., recrystalizing the double salt at a pressure about 250 psi and temperature ranging from 200.degree. C. to 250.degree. C., precipitating out the purified basic double salt, drying the precipitated double salt to drive off water and roasting it at 850.degree. C. to 950.degree. C. to drive off the sulfate, washing to remove the potassium sulfate and then drying the remaining alumina to yield activated alumina for use as a high-grade catalyst.

Abstract translation: 一种制备活性氧化铝的方法，包括以下步骤：将铝的双重盐溶解在85℃的纯水溶液中，在约250psi的压力和200-250℃的温度下重复结晶双重盐 将纯化的碱性双盐沉淀出来，干燥沉淀的双重盐，将其脱水并在850℃至950℃下焙烧以除去硫酸盐，洗涤除去硫酸钾，然后干燥剩余的氧化铝 以产生用作高级催化剂的活性氧化铝。