Process and apparatus for crimping fibers
    11.
    发明授权
    Process and apparatus for crimping fibers 失效
    压接纤维的方法和设备

    公开(公告)号:US5771674A

    公开(公告)日:1998-06-30

    申请号:US654333

    申请日:1996-05-28

    IPC分类号: D02G1/20 D01H5/00

    CPC分类号: D02G1/20

    摘要: An apparatus is provided for crimping and heat setting a filament or a tow of filaments and to provide fine filaments. The apparatus has at least one heating zone with means for heating a filament or a tow of filaments in an inert and/or oxidizing atmosphere. In the heating zone is a pair of horizontally movable mating conveying means having a multiplicity of protrusions for imparting a crimp to said filament or tow.

    摘要翻译: 提供了用于卷曲和热定形细丝或丝束的设备并提供细丝。 该装置具有至少一个加热区,该加热区具有用于在惰性和/或氧化气氛中加热长丝或丝束的装置。 在加热区中是一对水平移动的配合输送装置,具有多个突出部,用于使卷曲到所述细丝或丝束上。

    Stabilized lithium acetylide and reactions therewith
    14.
    发明授权
    Stabilized lithium acetylide and reactions therewith 失效
    稳定的乙炔化锂及其反应

    公开(公告)号:US5068368A

    公开(公告)日:1991-11-26

    申请号:US521743

    申请日:1990-05-10

    IPC分类号: C07C29/42 C07C33/042 C07J7/00

    摘要: A process for the preparation of ethynyl carbinols of the formula: ##STR1## wherein R" is hydrogen, a substituted or unsubstituted aliphatic or aromatic hydrocarbon, R'" is a substituted or unsubstituted aliphatic or aromatic hydrocarbon or R" and R'" together to the carbon atom to which they are joined represent a steroid, which comprises the steps ofA. reacting in a solvent system comprising an aromatic hydrocarbon, at least one lithium alkylamide selected from the group consisting of: ##STR2## wherein R is a hydrogen or lower alkyl, R' is hydrogen, lower alkyl, a substituted or unsubstituted aliphatic, alicyclic or aromatic hydrocarbon, x is an integer of 2 to 8, y and z are each 0 to 1, with acetylene to form a monolithium acetylideB. reacting in a solvent system comprising an aromatic hydrocarbon, the monolithium acetylene from Part A with a ketone of the formula R"R'"C.dbd.O, wherein R" and R'" are as hereinbefore defined, and thenC. hydrolysing the reaction product of Part B to form the corresponding ethynyl carbinol compound.

    摘要翻译: 一种制备下式的乙炔基甲醇的方法:其中R“是氢,取代或未取代的脂族或芳族烃,R”'是取代或未取代的脂族或芳族烃或R“和R “与它们连接的碳原子一起代表一种类固醇,其包括以下步骤:A.在包含芳族烃的溶剂体系中反应,至少一种选自以下的烷基胺化锂: 其中R为氢或低级烷基,R'为氢,低级烷基,取代或未取代的脂族,脂环族或芳族烃,x为2至8的整数,y和z各自为0至1,与乙炔 以形成单乙炔化物B.在包含芳族烃,来自A部分的单锂乙炔与式R''R''C = O的酮的溶剂体系中反应,其中R“和R”'为 如上所述,然后C.水解反应产物 的B部分形成相应的乙炔基甲醇化合物。

    Recovery of high purity PbO
    17.
    发明授权
    Recovery of high purity PbO 有权
    回收高纯PbO

    公开(公告)号:US07785561B1

    公开(公告)日:2010-08-31

    申请号:US12378636

    申请日:2009-02-18

    IPC分类号: C01G21/02

    摘要: A process for producing high purity lead oxide from impure lead compounds particularly from waste lead battery paste which includes an oxidation-reduction step. The process results in a reduction of impure lead compounds to the +2 valence state and metal particle contaminants are oxidized to the +2 state.

    摘要翻译: 一种由不纯的铅化合物特别是废氧化还原步骤的废铅电池糊生产高纯氧化铅的方法。 该过程导致不纯的铅化合物减少到+2价态,金属颗粒污染物被氧化成+2状态。