公开(公告)号：US12215037B2

公开(公告)日：2025-02-04

申请号：US18511056

申请日：2023-11-16

Applicant: Evergreen Alumina, LLC

Inventor： Riley Davis Robbins

IPC: C01F7/46 ,  B01D1/28 ,  B02C23/14 ,  B03B9/04 ,  C01C1/02 ,  C01C1/12 ,  C01D3/08

Abstract: The disclosed technology includes a method for producing ultrafine alumina from salt slag waste generated in aluminum recycling useful in the manufacture of durable ceramic products; a system for recovering alumina from salt slag waste; a method and systems for recovering salts, aluminum and alumina from salt slag waste; and a method and systems of capturing ammonia in a process recovering salts, aluminum and alumina from salt slag waste. The methods and systems provided crush the dry particles of the salt slag waste, scrub the slag with water, and with steam and by means of a vented alumina press, dewater the scrubbed slag particles. In some methods and systems of the disclosed technology, the particles of the pressed alumina cake are further reduced. In some methods and systems, the salt in the salt effluent is crystalized. In some methods and systems of the disclosed technology, the ammonia is contained and captured.

公开(公告)号：US12122725B2

公开(公告)日：2024-10-22

申请号：US17612789

申请日：2020-12-11

Applicant: ARDEX Group GmbH

Inventor： Stephen Alan Brooks ,  Rüdiger Oberste-Padtberg ,  Jörg Sieksmeier ,  Hubert Motzet ,  Michael Pomberg

IPC: C04B7/32 ,  C01F7/46 ,  C02F1/00 ,  C02F11/08 ,  C02F11/123 ,  C02F11/13 ,  C04B7/02 ,  C04B7/24 ,  C04B7/40 ,  C04B7/43 ,  C04B7/44 ,  C04B7/51 ,  C04B7/52 ,  C04B14/06 ,  C04B14/28 ,  C04B24/26 ,  C04B28/06 ,  C04B28/14 ,  F23G5/027 ,  F27B7/08 ,  F27B7/36 ,  C02F101/10 ,  C04B111/00 ,  C04B111/60

CPC classification number: C04B7/323 ,  C01F7/46 ,  C02F1/008 ,  C02F11/08 ,  C02F11/123 ,  C02F11/13 ,  C04B7/02 ,  C04B7/24 ,  C04B7/32 ,  C04B7/40 ,  C04B7/434 ,  C04B7/4423 ,  C04B7/51 ,  C04B7/52 ,  C04B7/525 ,  C04B14/06 ,  C04B14/28 ,  C04B24/2611 ,  C04B24/2641 ,  C04B28/06 ,  C04B28/065 ,  C04B28/14 ,  C04B28/146 ,  C04B28/147 ,  F23G5/0273 ,  F27B7/08 ,  F27B7/36 ,  C01P2002/72 ,  C02F2101/10 ,  C02F2209/02 ,  C04B2111/00637 ,  C04B2111/00646 ,  C04B2111/60 ,  F23G2201/20

Abstract: The invention relates to a method of producing a binder comprising the steps of preparing (20) a residual material comprising amorphous alumina-rich and/or aluminium hydroxide-rich constituents, heating (30) the residual material to produce a fired material, the heating (30) of the residual material being at a temperature of >800° C.

公开(公告)号：US11834343B2

公开(公告)日：2023-12-05

申请号：US17097655

申请日：2020-11-13

Applicant: Riley Davis Robbins

Inventor： Riley Davis Robbins

IPC: C01F7/46 ,  C01D3/08 ,  B02C23/14 ,  B01D1/28 ,  C01C1/12 ,  C01C1/02

CPC classification number: C01F7/46 ,  B01D1/28 ,  B02C23/14 ,  C01C1/02 ,  C01D3/08

Abstract: The disclosed technology includes a method for producing ultrafine alumina from salt slag waste generated in aluminum recycling useful in the manufacture of durable ceramic products; a system for recovering alumina from salt slag waste; a method and systems for recovering salts, aluminum and alumina from salt slag waste; and a method and systems of capturing ammonia in a process recovering salts, aluminum and alumina from salt slag waste. The methods and systems provided crush the dry particles of the salt slag waste, scrub the slag with water, and with steam and by means of a vented alumina press, dewater the scrubbed slag particles. In some methods and systems of the disclosed technology, the particles of the pressed alumina cake are further reduced. In some methods and systems, the salt in the salt effluent is crystalized. In some methods and systems of the disclosed technology, the ammonia is contained and captured.

公开(公告)号：US20220243300A1

公开(公告)日：2022-08-04

申请号：US17612457

申请日：2020-02-28

Applicant: Johann EIRICH ,  Vitali WELMANN

Inventor： Boris Nikolaevich ULKO ,  Johann EIRICH ,  Vitali WELMANN

IPC: C22B3/22 ,  C01F7/46 ,  B01J8/14 ,  C22B21/02

Abstract: A bauxite processing method including: preliminarily grinding bauxites; mixing the bauxites as ground with magnetic field treated water into a pulp; exposing the pulp in a reaction chamber to a rotating magnetic field created by rotating ferromagnetic elements, carried out in a vortex layer generated by ferromagnetic elements rotating at a speed of at least 2800 rpm, to achieve a magnetoelastic effect and provide forces and energies which enable metal reduction; and separating a resulting metal oxide mixture.

公开(公告)号：US20220227665A1

公开(公告)日：2022-07-21

申请号：US17613850

申请日：2020-06-12

Applicant: ARDEX Group GmbH

Inventor： Mark Russell

IPC: C04B7/32 ,  C02F11/08 ,  C02F11/13 ,  C02F11/123 ,  C02F1/00 ,  C01F7/46 ,  C04B28/06 ,  C04B28/14 ,  C04B7/02 ,  C04B7/24 ,  F23G5/027 ,  F27B7/08 ,  F27B7/36

Abstract: A method for processing water treatment residuals, or other amorphous aluminium oxide or aluminium hydroxide rich waste residuals, for use in the manufacture of hydraulic binders, comprising heating the residuals to remove water and oxidise organic material contained therein, comprising controlling the temperature of the residuals during heating such that they are heated to a temperature no higher than 800° C., more preferably no higher than 650° C., to ensure that aluminium compounds in the WTR, in particular aluminium oxide and aluminium hydroxide, remain in an amorphous state. The method may comprise controlling the temperature of the water treatment residuals such that they are heated to a temperature between 350° C. and 650° C., more preferably between 400° C. and 500° C.

公开(公告)号：US10358355B2

公开(公告)日：2019-07-23

申请号：US15841533

申请日：2017-12-14

Applicant: American Air Liquide, Inc.

Inventor： Rovshan Mahmudov ,  Sylvester Zuttah

IPC: C01F7/00 ,  C01F7/46 ,  C02F11/14 ,  C02F1/52

Abstract: A method for recovery of aluminum hydroxide Al(OH)3 from an aluminum enriched water/wastewater treatment sludge is disclosed. The method includes the steps of: adding a hydrated lime slurry to the aluminum enriched water/wastewater treatment sludge to form an alkaline sludge; adding sodium carbonate Na2CO3 to the alkaline sludge to form a Na2CO3 treated sludge; forming a first supernatant from the Na2CO3 treated sludge of step b) containing NaAl(OH)4; introducing CO2 to the first supernatant to form a precipitate of Al(OH)3 and a second supernatant containing NaHCO3; and recycling at least a portion of the NaHCO3 from the second supernatant back to the alkaline sludge of step a).

公开(公告)号：US09944534B2

公开(公告)日：2018-04-17

申请号：US15346106

申请日：2016-11-08

Applicant: Nalco Company

Inventor： Everett C. Phillips ,  Timothy La ,  Kailas B. Sawant

IPC: C01F7/02 ,  C01F7/06 ,  C01F7/47 ,  C01F7/46 ,  C02F5/12 ,  C07F7/02 ,  C02F103/16

CPC classification number: C01F7/0633 ,  C01F7/0606 ,  C01F7/46 ,  C01F7/47 ,  C02F5/12 ,  C02F2103/16 ,  C07F7/025

Abstract: The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.

公开(公告)号：US20150275331A1

公开(公告)日：2015-10-01

申请号：US14225651

申请日：2014-03-26

Applicant: Roberto Nunes Szente

Inventor： Roberto Nunes Szente

IPC: C22B34/34 ,  C22B4/00 ,  C01F7/46

CPC classification number: C22B34/345 ,  C01G39/02 ,  C01G41/02 ,  C01G49/02 ,  C01G51/04 ,  C01G53/04 ,  C22B4/005 ,  Y02P10/23

Abstract: A process to recover molybdenum contained in spent petrochemical catalysts has been invented. The proposed process permits the recovery of molybdenum in the form of an alloy, which can also contain other elements, such as nickel, cobalt, tungsten, iron and others. The process starts with a calcining operation for removal of hydrocarbons initially present in the spent catalysts, as well as to oxidize molybdenum and eventual other metal elements, such as nickel, cobalt, tungsten, iron; the calcined material is then fed into a plasma reactor, where molybdenum is recovered in an alloy formed with the other possible elements; the metal alloy can be readily commercialized. Besides recovering molybdenum, the plasma process also generates inert ceramic byproducts, containing alumina, silica and fluxing agents, such as lime. The process is clean and can be used for continuous operation, treating several types of materials, particularly spent catalysts, containing molybdenum or similar elements.

Abstract translation: 已经发明了一种回收废石化催化剂中所含钼的方法。 所提出的方法允许以合金形式回收钼，其也可以含有其它元素，例如镍，钴，钨，铁等。 该过程开始于用于除去最初存在于废催化剂中的烃的煅烧操作，以及氧化钼和最终的其它金属元素，例如镍，钴，钨，铁; 然后将煅烧的材料进料到等离子体反应器中，其中钼与其它可能元素形成的合金中回收; 金属合金可以容易商业化。 除了回收钼之外，等离子体工艺还产生惰性陶瓷副产物，其含有氧化铝，二氧化硅和助熔剂，例如石灰。 该方法是干净的，可用于连续操作，处理几种类型的材料，特别是含有钼或类似元素的废催化剂。

公开(公告)号：US6123848A

公开(公告)日：2000-09-26

申请号：US11321

申请日：1998-02-12

Applicant: Rosa Isabel Quepons Dominguez ,  Lance Eugene Solter ,  Danny Thomas Lauff ,  John David Mitchell ,  Edward Charles Jantosik, Jr. ,  David Carl Woodward

Inventor： Rosa Isabel Quepons Dominguez ,  Lance Eugene Solter ,  Danny Thomas Lauff ,  John David Mitchell ,  Edward Charles Jantosik, Jr. ,  David Carl Woodward

IPC: B01D61/14 ,  B01D61/16 ,  B01D61/22 ,  B01D63/16 ,  C01F7/46 ,  C09B57/00 ,  C09B67/54

CPC classification number: B01D61/145 ,  B01D61/16 ,  B01D61/22 ,  B01D63/16 ,  C01F7/46 ,  C09B57/00 ,  C09B67/0096

Abstract: A process and apparatus for purifying water-insoluble particles is disclosed. The process comprises the steps of continuously recirculating a fluid aqueous suspension of the water-insoluble particles between a filtration system and a suspension reservoir; continuously conducting ultrafiltration of the recirculating suspension at the filtration system to separate an aqueous permeate containing the water-soluble impurities from the recirculating fluid aqueous suspension; continuously discharging the permeate generated by ultrafiltration; adding water to the recirculating fluid aqueous suspension undergoing ultrafiltration at approximately the same volumetric rate per hour as permeate is being discharged; monitoring the purity of the recirculating fluid aqueous suspension; and recovering the purified fluid aqueous suspension after the recirculating fluid aqueous suspension has reached a predetermined purity condition. An apparatus is also disclosed for carrying out the above process. Preferred water-insoluble particles may include lakes (particles with absorbed dye) and particles used to make lakes such as finely divided aluminum hydrate. Advantages of this invention include the ability to consistently produce high purity water-insoluble particles at low cost and with savings in manual labor. Purification according to this invention requires substantially less water than prior art methods, reducing purified water consumption and waste product disposal costs.

Abstract translation: PCT No.PCT / US97 / 13237 Sec。 371日期1998年2月12日 102（e）1998年2月12日PCT PCT 1997年7月25日PCT公布。 公开号WO98 / 35746 日本1998年8月20日公开了一种净化水不溶性颗粒的方法和装置。 该方法包括以下步骤：在过滤系统和悬浮液储存器之间连续循环水不溶性颗粒的流体水悬浮液; 在过滤系统上连续进行再循环悬浮液的超滤，以将含有水溶性杂质的含水渗透物与再循环流体水悬浮液分离; 连续排放超滤产生的渗透物; 向正在排出的渗透物以与每小时几乎相同的体积速率进行超滤的循环流体水性悬浮液中加入水; 监测循环流体水性悬浮液的纯度; 并在循环流体水悬浮液达到预定纯度条件之后回收纯化的流体水性悬浮液。 还公开了一种用于执行上述过程的装置。 优选的水不溶性颗粒可以包括湖泊（具有吸收的染料的颗粒）和用于制备诸如细分的水合铝的湖泊的颗粒。 本发明的优点包括能够以低成本持续生产高纯度水不溶性颗粒并节省人工劳动的能力。 根据本发明的纯化需要比现有技术方法少得多的水，减少纯化水的消耗和废弃的产品处理成本。

公开(公告)号：US5360778A

公开(公告)日：1994-11-01

申请号：US60378

申请日：1993-05-11

Applicant: Stephen M. Davis ,  LeRoy R. Clavenna ,  Geoffrey R. Say ,  Rocco A. Fiato

Inventor： Stephen M. Davis ,  LeRoy R. Clavenna ,  Geoffrey R. Say ,  Rocco A. Fiato

IPC: B01J8/00 ,  C01B3/44 ,  C01B13/14 ,  C01F7/02 ,  C01F7/46 ,  B01J20/02 ,  B01J20/30 ,  B01J21/02

CPC classification number: C01B3/44 ,  B01J8/008 ,  C01B13/145 ,  C01F7/02 ,  C01F7/46 ,  C01P2002/85 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/80 ,  Y02P20/52

Abstract: High surface purity heat transfer solids are formed, suitably by washing and treating particulate refractory inorganic solids, notably alumina, which contains as impurities up to about 0.5 wt. % silicon and/or up to about 500 wppm boron, with an acid, or dilute acid solution sufficient to reduce the concentration of silicon and boron in the outer peripheral surface layer of the particles, e.g., as measured inwardly toward the center of a particle to a depth of about 50 .ANG. using X-ray photoelectron spectroscopy, to no greater than about 5 atom percent silicon and boron, preferably about 2 atom percent silicon and boron, based on the total number of cations within said outer peripheral surface layer, thereby reducing the tendency of said particles to sinter and agglomerate in the conversion of said hydrocarbon to hydrogen and carbon monoxide in a fluidized bed synthesis gas operation vis-a-vis particles otherwise similar except that the particles are not treated with the acid. The tendency of the particles to sinter and agglomerate is further reduced by the additional removal of sodium, iron, calcium, and titanium impurities from the outer peripheral surface layer of the particles. Preferably the latter named impurities, or impurities other than silicon and boron, are reduced to a concentration below about 20 atom %, more preferably to a concentration below about 15 atom %, in the outer surface layer of the particles.

Abstract translation: 适当地通过洗涤和处理颗粒耐火无机固体，特别是氧化铝来形成高表面纯度的热传递固体，其含有高达约0.5wt。 ％硅和/或高达约500wppm的硼，与酸或稀酸溶液相比足以降低颗粒外周表面层中硅和硼的浓度，例如向内朝向颗粒中心测量 基于所述外周表面层中的阳离子总数，使用X射线光电子能谱测量至约50AHZ的深度，不大于约5原子％的硅和硼，优选约2原子％的硅和硼，由此 降低了所述颗粒在流化床合成气操作中将所述烃转化为氢气和一氧化碳的过程中所述颗粒烧结和附聚的倾向，除了颗粒不用酸处理之外，颗粒否则相似。 通过从颗粒的外周表面层另外去除钠，铁，钙和钛杂质，进一步降低了颗粒烧结和附聚的倾向。 优选地，后者称为杂质或除了硅和硼之外的杂质，在颗粒的外表面层中被还原成低于约20原子％，更优选低于约15原子％的浓度。