METHOD OF PRODUCING A HIGHLY-PURE ALUMINUM HYDROXIDE

    公开(公告)号:US20180022613A1

    公开(公告)日:2018-01-25

    申请号:US15656079

    申请日:2017-07-21

    IPC分类号: C01F7/42

    CPC分类号: C01F7/42 C01F7/36 C01P2004/61

    摘要: A method of producing a highly-pure aluminum hydroxide, comprising the following steps: (1) reacting alcohol with metal aluminum to produce aluminum alkoxide, then hydrolyzing the aluminum alkoxide with water to produce an aluminum hydroxide slurry and an alcohol, filtering the aluminum hydroxide slurry, washing a resulting filter cake with water to remove the alcohol trapped therein, and drying the filter cake after the water washing to produce an aluminum hydroxide powder, (2) sending the alcohol-containing water produced in step (1) to an alcohol extraction unit for separating water and alcohol through extraction, and sending the separated water back to step (1) for recycling, (3) dehydrating the hydrous alcohol produced by hydrolyzing the aluminum alkoxide in step (1) before using it as the raw materials for reacting metal aluminum with alcohol to produce aluminum alkoxide in step (1). The method can improve the recovery of alcohol, reduce the production cost of a highly-pure aluminum hydroxide, improve the purity of aluminum oxide and achieve a zero discharge of sewage by recycling water.

    Method for Regenerating Semi-Regenerated Reforming Catalyst
    67.
    发明申请
    Method for Regenerating Semi-Regenerated Reforming Catalyst 有权
    再生半再生催化剂的再生方法

    公开(公告)号:US20160279626A1

    公开(公告)日:2016-09-29

    申请号:US15081234

    申请日:2016-03-25

    摘要: A method for regenerating semi-regenerated reforming catalyst comprises adjusting the reaction temperature to 250-480° C.; introducing sulfur-containing naphtha into the reforming reactor, so that the sulfur content in the catalyst is 0.32-0.8 mass %; then stopping introducing the raw materials into the reforming reactor; subjecting the catalyst to coke-burning, oxychlorination and reduction. Another method for regenerating semi-regenerated reforming catalyst comprises coke-burning the spent catalyst; introducing sulfate ions thereinto; then performing oxychlorination and reduction. There is still another method for regenerating a platinum-rhenium reforming catalyst, comprising coke-burning the spent catalyst; introducing sulfur and chlorine by impregnation; then drying, calcinating and reducing. The catalysts regenerated by said methods can be used without presulfurization and have excellent regeneration performance.

    摘要翻译: 再生再生重整催化剂的方法包括将反应温度调节至250-480℃; 将含硫的石脑油引入重整反应器中,使得催化剂中的硫含量为0.32-0.8质量%; 然后停止将原料引入重整反应器; 对催化剂进行焦烧,氧氯化和还原。 再生再生重整催化剂的另一种方法包括焦炭燃烧废催化剂; 向其中引入硫酸根离子; 然后进行氧氯化和还原。 还有另一种再生铂 - 铼重整催化剂的方法,包括焦炭燃烧废催化剂; 通过浸渍引入硫和氯; 然后干燥,煅烧和还原。 通过所述方法再生的催化剂可以在没有预硫化的情况下使用并且具有优异的再生性能。

    DIMETHYLSULFOXIDE PREPARATION METHOD
    69.
    发明申请
    DIMETHYLSULFOXIDE PREPARATION METHOD 有权
    二甲基硅氧烷制备方法

    公开(公告)号:US20150284322A1

    公开(公告)日:2015-10-08

    申请号:US14439562

    申请日:2013-10-29

    IPC分类号: C07C315/02 C07C319/14

    摘要: A process for producing dimethyl sulfoxide, wherein said process comprises the following steps: (1) contacting hydrogen sulfide with methanol to produce a mixture containing dimethyl sulfide, and separating dimethyl sulfide from the mixture; and (2) in the presence or absence of a solvent, contacting dimethyl sulfide obtained in step (1) with at least one oxidant and a catalyst to produce a mixture containing dimethyl sulfoxide, said catalyst comprises at least one Ti—Si molecular sieve.

    摘要翻译: 一种生产二甲基亚砜的方法,其中所述方法包括以下步骤:(1)使硫化氢与甲醇接触以产生含有二甲基硫醚的混合物,并从混合物中分离出二甲基硫醚; 和(2)在存在或不存在溶剂的情况下,将步骤(1)中获得的二甲基硫醚与至少一种氧化剂和催化剂接触以产生含有二甲基亚砜的混合物,所述催化剂包含至少一种Ti-Si分子筛。