Solvent-extraction process for recovery and separation of metal values
    3.
    发明授权
    Solvent-extraction process for recovery and separation of metal values 失效
    用于回收和分离金属值的溶剂萃取过程

    公开(公告)号:US4255395A

    公开(公告)日:1981-03-10

    申请号:US70922

    申请日:1979-08-30

    摘要: Improved solvent-extractants for the selective recovery of metal values from acidic aqueous media comprise solutions of 5-alkylbenzotriazoles in water-immiscible organic solvents. Extraction efficiency is enhanced by addition to the solvent-extractant of alkyl aromatic sulfonic acids, alkyl phosphoric acids or carboxylic acids. Especially important applications for the improved solvent-extractants are in the recovery of copper (II) from cobalt (II), copper (II) from nickel (II), copper (II) from iron (III), copper (II) from zinc (II), nickel (II) from cobalt (II), nickel (II) from zinc (II), nickel (II) from iron (III), iron (III) from magnesium (II), and cobalt (II) from zinc (II).

    摘要翻译: 用于从酸性水性介质中选择性回收金属值的改进的溶剂萃取剂包括5-烷基苯并三唑在与水不混溶的有机溶剂中的溶液。 通过加入烷基芳族磺酸,烷基磷酸或羧酸的溶剂萃取剂来提高萃取效率。 改进的溶剂萃取剂的特别重要的应用是从钴(II),来自镍(II)的铜(II),来自铁(III)的铜(II),来自锌(II)的铜(II)),来自锌 (II),来自钴(II)的镍(II),来自锌(II)的镍(II),来自铁(III)的镍(II),来自镁(II)的铁(III) 锌(II)。

    Linear, low-molecular-weight polyester-based polyol
    6.
    发明授权
    Linear, low-molecular-weight polyester-based polyol 失效
    线性,低分子量聚酯基多元醇

    公开(公告)号:US4922002A

    公开(公告)日:1990-05-01

    申请号:US355164

    申请日:1989-05-22

    IPC分类号: C07C69/34

    CPC分类号: C07C69/34

    摘要: This invention relates to certain linear, low-molecular-weight polyester-based polyols having at least two hydroxyl groups, low viscosity, high solids content and having the structural formula: ##STR1## wherein R is a moiety derived from a saturated aliphatic polyhydric alcohol; n is 1 or 2, and at least about 50% by weight, of n is n=1; p is 0 to 4 inclusive and m is 2 to 10 inclusive; said polyol being substantially free of any unreacted polyhydric alcohol.

    摘要翻译: 本发明涉及具有至少两个羟基,低粘度,高固体含量并具有以下结构式的某些线性,低分子量的基于聚酯的多元醇:其中R是衍生自饱和脂族多元醇的部分 ; n为1或2,至少约50重量%,n为n = 1; p为0〜4,m为2〜10, 所述多元醇基本上不含任何未反应的多元醇。

    Process for preparing linear, low molecular weight polyester-based polyol
    7.
    发明授权
    Process for preparing linear, low molecular weight polyester-based polyol 失效
    制备线型低分子量聚酯基多元醇的方法

    公开(公告)号:US4902821A

    公开(公告)日:1990-02-20

    申请号:US453222

    申请日:1982-12-27

    IPC分类号: C08G63/199

    CPC分类号: C08G63/199

    摘要: This invention relates to a linear, low-molecular-weight polyester-based polyol having terminal primary hydroxyl groups, low viscosity, high solids content and having the structural formula: ##STR1## where n is 1 or 2 and at least 70% by weight is n=1, and m=2-10, said polyol being substantially free of cyclohexane dimethanol.

    摘要翻译: 本发明涉及具有末端伯羟基,低粘度,高固体含量的直链,低分子量的聚酯基多元醇,其结构式如下:其中n为1或2,并且在 至少70重量%为n = 1,m = 2-10,所述多元醇基本上不含环己烷二甲醇。