Sulfide precipitation of heavy metals from aqueous solutions
    2.
    发明授权
    Sulfide precipitation of heavy metals from aqueous solutions 失效
    从水溶液中重金属的硫化物沉淀

    公开(公告)号:US5338460A

    公开(公告)日:1994-08-16

    申请号:US51509

    申请日:1993-04-22

    申请人: Jeffrey H. Yen

    发明人: Jeffrey H. Yen

    摘要: A process is disclosed for the removal of dissolved heavy metals from aqueous solution contaminated therewith wherein at least one of said heavy metals is reacted with a water-soluble inorganic sulfide or hydrosulfide at a defined elevated temperature and a controlled pH of between about 2 to about 3.5 to thereby precipitate heavy metal sulfide, and thereafter separating the precipitate from the filtrate.

    摘要翻译: 公开了一种从被污染的水溶液中除去溶解的重金属的方法,其中至少一种所述重金属与水溶性无机硫化物或氢硫化物在规定的升高温度下反应,并且约2至约 3.5,从而沉淀重金属硫化物,然后从滤液中分离出沉淀物。

    Use of Decanter Centrifuge in Polymer Processing
    4.
    发明申请
    Use of Decanter Centrifuge in Polymer Processing 有权
    在聚合物加工中使用脱水离心机

    公开(公告)号:US20080171843A1

    公开(公告)日:2008-07-17

    申请号:US11816475

    申请日:2006-03-13

    申请人: Jeffrey H. Yen

    发明人: Jeffrey H. Yen

    IPC分类号: C08J3/00

    摘要: The present invention relates to a process for the removal of solvent from a polymer emulsion or suspension, by use of a decanter centrifuge (10). The decanter centrifuge (10) provides an efficient thickening method. The process is especially useful for emulsion or suspension polymer compositions having high levels of solvent (low polymer solids) that could benefit from a thickening or dewatering step prior to drying in a dryer (14).

    摘要翻译: 本发明涉及通过使用沉降式离心机(10)从聚合物乳液或悬浮液中除去溶剂的方法。 沉降式离心机(10)提供了一种有效的增稠方法。 该方法对于具有高水平溶剂(低聚合物固体)的乳液或悬浮聚合物组合物特别有用,其可以在干燥器(14)中干燥之前从增稠或脱水步骤受益。

    Catalyst composition dewaxing of lubricating oils
    5.
    发明授权
    Catalyst composition dewaxing of lubricating oils 失效
    催化剂组合物脱蜡润滑油

    公开(公告)号:US4601993A

    公开(公告)日:1986-07-22

    申请号:US661632

    申请日:1984-10-17

    CPC分类号: C10G45/64 B01J29/80

    摘要: Hydrocarbon lubricating oil feedstocks are dewaxed by passing the waxy feedstock over a catalyst bed containing a mixture of medium pore zeolite and large pore zeolite catalysts havig a Constraint Index less than 2 and having hydroisomerization activity in the presence of a hydrogenation component.

    摘要翻译: 通过将含蜡原料通过含有中等孔沸石和大孔沸石催化剂的混合物的催化剂床,使烃润滑油原料脱蜡,达到小于2的约束指数,并且在氢化组分存在下具有加氢异构化活性。

    Cascade hydrodewaxing process
    7.
    发明授权
    Cascade hydrodewaxing process 失效
    级联加氢脱蜡工艺

    公开(公告)号:US4599162A

    公开(公告)日:1986-07-08

    申请号:US684992

    申请日:1984-12-21

    申请人: Jeffrey H. Yen

    发明人: Jeffrey H. Yen

    IPC分类号: C10G45/64 C10G65/04 C10G65/10

    CPC分类号: C10G65/043 C10G45/64

    摘要: Hydrocarbon feedstocks are dewaxed in a dual catalyst cascade process by passing the waxy feedstock over a crystalline silicate zeolite catalyst having a Constraint Index between 2 and 12, and then over a different crystalline silicate zeolite catalyst having a Constraint Index no less than 2.

    摘要翻译: 通过使蜡质原料通过约2至12之间的约束指数的结晶硅酸盐沸石催化剂,然后超过约束指数不小于2的不同结晶硅酸盐沸石催化剂,将烃原料在双催化剂级联方法中脱蜡。

    FLUOROPOLYMER COMPOSITION
    9.
    发明申请
    FLUOROPOLYMER COMPOSITION 审中-公开
    氟聚合物组合物

    公开(公告)号:US20120329923A1

    公开(公告)日:2012-12-27

    申请号:US13524376

    申请日:2012-06-15

    IPC分类号: C08L27/16 C08K5/42 C08K5/19

    摘要: The invention relates to a process that results in a fluoropolymer composition with improved chemical, thermal and color stabilities, and a reduced level of residual surfactants (both fluorosurfactants and non-fluorosurfactants. Such improvements, as indicated by total oxidizable carbon (TOC) and pellet yellowness index (YI), can be accomplished in a cost-effect manner through the use of a dewatering extruder. The dewatering extruder combines several typical unit operations into a single operation, producing solid fluoropolymer having a significantly reduced total oxidizable carbons, a lower yellowness index and minimal amounts of surfactants.

    摘要翻译: 本发明涉及一种导致氟聚合物组合物具有改进的化学,热和颜色稳定性以及降低的残留表面活性剂(含氟表面活性剂和非氟表面活性剂)的水平的方法,如由总可氧化碳(TOC)和颗粒 黄色指数(YI)可以通过使用脱水挤出机以成本效益的方式实现,脱水挤出机将几种典型的单元操作组合成单一操作,生产具有显着降低的总可氧化碳的固体含氟聚合物,较低的黄度 指数和最少量的表面活性剂。

    Multiple-stage precipitation process for heavy metals in aqueous solution
    10.
    发明授权
    Multiple-stage precipitation process for heavy metals in aqueous solution 失效
    重金属在水溶液中的多阶段沉淀过程

    公开(公告)号:US5262063A

    公开(公告)日:1993-11-16

    申请号:US882774

    申请日:1992-05-14

    申请人: Jeffrey H. Yen

    发明人: Jeffrey H. Yen

    IPC分类号: C02F9/00 C02F1/58

    摘要: In the process of removing heavy metals from aqueous solutions by precipitation of a salt thereof at increased pH, multiple stage precipitation by upward stepwise pH adjustment and solid separation at each stage is used to facilitate the manufacture of a product of high purity.

    摘要翻译: 在通过在增加的pH下将其盐沉淀从水溶液中除去重金属的过程中,通过向上逐步的pH调节和每个阶段的固体分离进行多级沉淀,以促进高纯度产物的制造。