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    • 3. 发明授权
    • Ultrafiltration method for purifying water-insoluble aluminum hydrates
    • 用于净化水不溶性水合铝的超滤方法
    • US6123848A
    • 2000-09-26
    • US11321
    • 1998-02-12
    • Rosa Isabel Quepons DominguezLance Eugene SolterDanny Thomas LauffJohn David MitchellEdward Charles Jantosik, Jr.David Carl Woodward
    • Rosa Isabel Quepons DominguezLance Eugene SolterDanny Thomas LauffJohn David MitchellEdward Charles Jantosik, Jr.David Carl Woodward
    • B01D61/14B01D61/16B01D61/22B01D63/16C01F7/46C09B57/00C09B67/54
    • B01D61/145B01D61/16B01D61/22B01D63/16C01F7/46C09B57/00C09B67/0096
    • 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.
    • 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。