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1.发明授权Method for purification of spent sulfuric acid from titanium dioxide rutile industry 有权从二氧化钛金红石工业中纯化废硫酸的方法公开(公告)号：US09156716B2
公开(公告)日：2015-10-13
申请号：US14592162
申请日：2015-01-08
Inventor： Ahmed Yasir Vakayil , Rene Jongen , Ahmad I. Jomha
IPC: C02F1/52 , C01B25/37 , C01G23/053 , C01B17/90 , C02F101/20
CPC classification number: C02F1/52 , C01B17/901 , C01B25/372 , C01B25/375 , C01G23/0532 , C02F1/5236 , C02F2101/20
Abstract: A method for the purification of spent sulfuric acid and particularly the purification of spent acid, from titanium dioxide rutile manufacture through a chloride route, is provided. In the chloride route of titanium dioxide manufacture, sulfuric acid is used to clean the un-reacted gaseous flow coming out of the oxidizer, so the spent acid mainly contains un-reacted Ti4+ ions, trace amounts of Fe3+ ions, and NO2 gas. Titanium phosphate can be precipitated using acidic and or alkaline phosphate-containing precipitants in stoichiometric amounts. The method can include the addition of cutting water. NO2 gas evolved during the reaction can be scrubbed in water. The resulting aqueous acid-rich portion, or supernatant, can be separated from the precipitated phosphates and is very clear. Evaporation under vacuum conditions can increase the sulfuric acid concentration. The resultant purified acid can be re-used.
Abstract translation: 提供了从二氧化钛金红石制造通过氯化物路线纯化废硫酸，特别是纯化废酸的方法。 在制造二氧化钛的氯化物路线中，使用硫酸清洗从氧化剂出来的未反应的气体流，因此废酸主要含有未反应的Ti4 +离子，痕量的Fe3 +离子和NO2气体。 可以使用化学计量的酸性和/或碱性磷酸盐沉淀剂沉淀磷酸钛。 该方法可以包括添加切割水。 在反应过程中产生的NO2气体可以在水中洗涤。 所得到的富含酸的部分或上清液可以与沉淀的磷酸盐分离，并且非常清楚。 在真空条件下蒸发可增加硫酸浓度。 所得纯化的酸可以重复使用。
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2.发明授权Surface treatment method for making high durability universal titanium dioxide rutile pigment 有权表面处理方法制造高耐久性通用二氧化钛金红石颜料公开(公告)号：US09505022B2
公开(公告)日：2016-11-29
申请号：US13693667
申请日：2012-12-04
Inventor： Ahmed Yasir Vakayil , Ahmad I. Jomha
CPC classification number: B05D1/18 , C01P2002/80 , C01P2002/84 , C09C1/3661 , C09D7/62
Abstract: A method is provided for the wet surface treatment of titanium dioxide, in order to produce durable universal grade titanium dioxide rutile pigment with superior optical properties. The method is characterized in that, a hydrous zirconia and silica composite layer is co-precipitated at acidic pH. Then, a layer of alumina is precipitated under a range of pH required for complete precipitation above the initial composite layer. The upper pH limit of the slurry during the alumina precipitation can be well controlled to avoid any chance for dissolution or damage of the composite zirconia-silica layer formed. Zirconia-silica composite layers and alumina thus precipitated advantageously improve the competence of the layers formed over a TiO2 base and provide improved durability with superior optical performance. The total surface treatment cycle time and chemicals used are minimal compared to conventional methods. Improvements in throughput and washing efficiency are also realized.
Abstract translation: 提供了一种用于二氧化钛的湿表面处理的方法，以便产生具有优异光学性能的耐久的通用级二氧化钛金红石颜料。 该方法的特征在于，水合氧化锆和二氧化硅复合层在酸性pH下共沉淀。 然后，在初始复合层之上的完全沉淀所需的pH范围内沉淀出一层氧化铝。 氧化铝沉淀期间浆料的上限pH值可以很好地控制，以避免形成的复合氧化锆 - 二氧化硅层的任何溶解或损坏的机会。 氧化锆 - 二氧化硅复合层和由此沉淀的氧化铝有利地提高了形成在TiO 2基体上的层的能力，并提供了优异的光学性能的改善的耐久性。 与常规方法相比，总的表面处理循环时间和所用的化学品是最小的。 吞吐量和洗涤效率的提高也得以实现。
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3.发明申请METHOD FOR PURIFICATION OF SPENT SULFURIC ACID FROM TITANIUM DIOXIDE RUTILE INDUSTRY 审中-公开从二氧化钛工业净化硫酸钠的方法公开(公告)号：US20150122744A1
公开(公告)日：2015-05-07
申请号：US14592162
申请日：2015-01-08
Inventor： Ahmed Yasir VAKAYIL , Rene JONGEN , Ahmad I. JOMHA
IPC: C02F1/52
CPC classification number: C02F1/52 , C01B17/901 , C01B25/372 , C01B25/375 , C01G23/0532 , C02F1/5236 , C02F2101/20
Abstract: A method for the purification of spent sulfuric acid and particularly the purification of spent acid, from titanium dioxide rutile manufacture through a chloride route, is provided. In the chloride route of titanium dioxide manufacture, sulfuric acid is used to clean the un-reacted gaseous flow coming out of the oxidizer, so the spent acid mainly contains un-reacted Ti4+ ions, trace amounts of Fe3+ ions, and NO2 gas. Titanium phosphate can be precipitated using acidic and or alkaline phosphate-containing precipitants in stoichiometric amounts. The method can include the addition of cutting water. NO2 gas evolved during the reaction can be scrubbed in water. The resulting aqueous acid-rich portion, or supernatant, can be separated from the precipitated phosphates and is very clear. Evaporation under vacuum conditions can increase the sulfuric acid concentration. The resultant purified acid can be re-used.
Abstract translation: 提供了从二氧化钛金红石制造通过氯化物路线纯化废硫酸，特别是纯化废酸的方法。 在制造二氧化钛的氯化物路线中，使用硫酸清洗从氧化剂出来的未反应的气体流，因此废酸主要含有未反应的Ti4 +离子，痕量的Fe3 +离子和NO2气体。 可以使用化学计量的酸性和/或碱性磷酸盐沉淀剂沉淀磷酸钛。 该方法可以包括添加切割水。 在反应过程中产生的NO2气体可以在水中洗涤。 所得到的富含酸的部分或上清液可以与沉淀的磷酸盐分离，并且非常清楚。 在真空条件下蒸发可增加硫酸浓度。 所得纯化的酸可以重复使用。
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Patent Agency Ranking
公开(公告)号：US08734750B2
公开(公告)日：2014-05-27
申请号：US13930778
申请日：2013-06-28
Inventor： Fadi Mohammed Saeed Trabzuni , Hassan Moenes El Dekki , Chathangat Cheroolil Gopalkrishnan
IPC: C01B33/32
CPC classification number: C01B33/32 , C01B33/12 , C01B33/143
Abstract: Sodium silicate solutions of modulus 3.0 to 3.8 are provided. In some embodiments, the solution is made by a process that uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.
Abstract translation: 提供了模量为3.0至3.8的硅酸钠溶液。 在一些实施方案中，溶液通过使用两个特定主要反应级的方法制备。 首先通过作为成本有效的SiO 2源的SSS与苛性钠水溶液反应来制备SiO 2 :Na 2 O摩尔比低的硅酸钠溶液，其范围为2.0至2.8。 通过使用由上述制备的中间体硅酸钠溶液制备为沉淀的无定形二氧化硅的SiO 2源，可以将低模量的中等硅酸钠溶液转化为高SiO 2 :Na 2 O摩尔比。
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公开(公告)号：US20150225531A1
公开(公告)日：2015-08-13
申请号：US14693699
申请日：2015-04-22
Inventor： Sami M. BASHIR , Fadi Mohammed Saeed TRABZUNI , Ahmed V. YASER
CPC classification number: C08K3/22 , C01P2002/85 , C01P2004/04 , C01P2004/61 , C01P2004/62 , C08K2003/2227 , C08K2003/2241 , C08K2003/2244 , C09C1/3661 , C09C3/063
Abstract: Coated titanium dioxide particles are provided and made from a method wherein a zirconium oxide coating and an aluminum oxide coating are formed on the surface of titanium dioxide particles. The zirconium oxide-forming and aluminum oxide-forming coating materials can be used to control the pH of the surface treatment process without the need for adding pH controlling agents.
Abstract translation: 提供涂覆的二氧化钛颗粒，并由二氧化钛颗粒表面上形成氧化锆涂层和氧化铝涂层的方法制成。 氧化锆形成和氧化铝形成涂层材料可用于控制表面处理过程的pH，而不需要添加pH控制剂。
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6.发明申请SURFACE TREATMENT METHOD FOR MAKING HIGH DURABILITY UNIVERSAL TITANIUM DIOXIDE RUTILE PIGMENT 有权表面处理方法制造高耐久性通用二氧化钛颗粒颜料公开(公告)号：US20140154413A1
公开(公告)日：2014-06-05
申请号：US13693667
申请日：2012-12-04
Inventor： Ahmed Yasir VAKAYIL , Ahmad I. JOMHA
IPC: B05D1/18
CPC classification number: B05D1/18 , C01P2002/80 , C01P2002/84 , C09C1/3661 , C09D7/62
Abstract: A method is provided for the wet surface treatment of titanium dioxide, in order to produce durable universal grade titanium dioxide rutile pigment with superior optical properties. The method is characterized in that, a hydrous zirconia and silica composite layer is co-precipitated at acidic pH. Then, a layer of alumina is precipitated under a range of pH required for complete precipitation above the initial composite layer. The upper pH limit of the slurry during the alumina precipitation can be well controlled to avoid any chance for dissolution or damage of the composite zirconia-silica layer formed. Zirconia-silica composite layers and alumina thus precipitated advantageously improve the competence of the layers formed over a TiO2 base and provide improved durability with superior optical performance. The total surface treatment cycle time and chemicals used are minimal compared to conventional methods. Improvements in throughput and washing efficiency are also realized.
Abstract translation: 提供了一种用于二氧化钛的湿表面处理的方法，以便产生具有优异光学性能的耐久的通用级二氧化钛金红石颜料。 该方法的特征在于，水合氧化锆和二氧化硅复合层在酸性pH下共沉淀。 然后，在初始复合层之上的完全沉淀所需的pH范围内沉淀出一层氧化铝。 氧化铝沉淀期间浆料的上限pH值可以很好地控制，以避免形成的复合氧化锆 - 二氧化硅层的任何溶解或损坏的机会。 氧化锆 - 二氧化硅复合层和由此沉淀的氧化铝有利地提高了形成在TiO 2基体上的层的能力，并提供了优异的光学性能的改善的耐久性。 与常规方法相比，总的表面处理循环时间和所用的化学品是最小的。 吞吐量和洗涤效率的提高也得以实现。
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公开(公告)号：US20130284974A1
公开(公告)日：2013-10-31
申请号：US13930778
申请日：2013-06-28
Inventor： Fadi Mohammed Saeed TRABZUNI , Hassan Moenes EL DEKKI , Chathangat Cheroolil GOPALKRISHNAN
CPC classification number: C01B33/32 , C01B33/12 , C01B33/143
Abstract: Sodium silicate solutions of modulus 3.0 to 3.8 are provided. In some embodiments, the solution is made by a process that uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.
Abstract translation: 提供了模量为3.0至3.8的硅酸钠溶液。 在一些实施方案中，溶液通过使用两个特定主要反应级的方法制备。 首先通过作为成本有效的SiO 2源的SSS与苛性钠水溶液反应来制备SiO 2 :Na 2 O摩尔比低的硅酸钠溶液，其范围为2.0至2.8。 通过使用由上述制备的中间体硅酸钠溶液制备为沉淀的无定形二氧化硅的SiO 2源，可以将低模量的中等硅酸钠溶液转化为高SiO 2 :Na 2 O摩尔比。
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公开(公告)号：US08512664B1
公开(公告)日：2013-08-20
申请号：US13652952
申请日：2012-10-16
Inventor： Fadi Mohammed Saeed Trabzuni , Hassan Moenes El Dekki , Chathangat Cheroolil Gopalkrishnan
IPC: C01B33/32
CPC classification number: C01B33/32 , C01B33/12 , C01B33/143
Abstract: A method is provided for treating silica sand scrubs (SSS) generated and accumulated as waste in the chloride manufacturing process of titanium dioxide pigment. A hydrothermal process is used to produce sodium silicate solutions of modulus 3.0 to 3.8, and precipitated silicas. In some embodiments, the process uses two specific principal reaction stages. A sodium silicate solution having a low SiO2:Na2O molar ratio, in the range from 2.0 to 2.8, is first produced by reaction of the SSS, as a cost-effective SiO2 source, with aqueous caustic soda. The conversion of this intermediate sodium silicate solution of low modulus to a high SiO2:Na2O molar ratio is made possible by using a SiO2 source that is prepared as precipitated amorphous silica from the intermediate sodium silicate solution produced above.
Abstract translation: 提供了一种在二氧化钛颜料的氯化物制造过程中用于处理作为废物产生和累积的二氧化硅砂磨（SSS）的方法。 使用水热法生产3.0〜3.8的硅酸钠溶液，沉淀二氧化硅。 在一些实施方案中，该方法使用两个特定的主要反应阶段。 首先通过作为成本有效的SiO 2源的SSS与苛性钠水溶液反应来制备SiO 2 :Na 2 O摩尔比低的硅酸钠溶液，其范围为2.0至2.8。 通过使用由上述制备的中间体硅酸钠溶液制备为沉淀的无定形二氧化硅的SiO 2源，可以将低模量的中等硅酸钠溶液转化为高SiO 2 :Na 2 O摩尔比。
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