Process for the removal of catalysts for polyether polyols
    42.
    发明授权
    Process for the removal of catalysts for polyether polyols 失效
    去除聚醚多元醇催化剂的方法

    公开(公告)号:US5105019A

    公开(公告)日:1992-04-14

    申请号:US459233

    申请日:1990-03-02

    IPC分类号: C08G65/28 C08G65/02 C08G65/30

    CPC分类号: C08G65/30

    摘要: The present invention relates to a process for removing a basic catalyst from a polyether polyol having a hydroxyl number of from 4 to 250 comprising adding from 0.7 to 7 percent by weight of water, based on the polyether polyol, to an alkaline reaction medium containing the polyether polyol at a temperature of from 20.degree. to 120.degree. C.; introducing 1 to 2 times the stoichiometric amount of gaseous carbon dioxide at a temperature of from 75.degree. to 120.degree. C., thereby forming a carbonate salt; and removing the carbonate salt by filtration.

    摘要翻译: 本发明涉及一种从羟基数为4〜250的聚醚多元醇中除去碱性催化剂的方法,包括将基于聚醚多元醇的0.7〜7重量%的水添加到含有 聚醚多元醇,温度为20〜120℃。 在75〜120℃的温度下引入1〜2倍的化学计量的气态二氧化碳,从而形成碳酸盐; 并通过过滤除去碳酸盐。

    Process for removing double metal cyanide catalyst residues from a polyol
    43.
    发明授权
    Process for removing double metal cyanide catalyst residues from a polyol 失效
    从多元醇中除去双金属氰化物催化剂残留物的方法

    公开(公告)号:US5099075A

    公开(公告)日:1992-03-24

    申请号:US608520

    申请日:1990-11-02

    CPC分类号: C08G65/2663 C08G65/30

    摘要: The present invention relates to a process for removing double metal cyanide complex catalyst residue(s) from polyol(s) which comprises after polyol formation the steps of: (a) contacting the catalyst residue-containing polyol with an effective amount of an oxidant to cause said residue(s) to form insoluble residues that are insoluble in the polyol, and (b) separating the insoluble residues from the polyol. In another aspect, the present invention relates to the oxidant-free polyol produced by the above process.

    摘要翻译: 本发明涉及一种从多元醇中除去双金属氰化物配合物催化剂残余物的方法,其包括在多元醇形成之后的步骤:(a)使含有催化剂残余物的多元醇与有效量的氧化剂接触, 导致所述残余物形成不溶于多元醇的不溶性残余物,和(b)从多元醇中分离出不溶性残留物。 另一方面,本发明涉及通过上述方法生产的不含氧化剂的多元醇。

    Liquid-crystal copolyethers based on 7-oxa-bicyclo(2,2,1)heptane
    44.
    发明授权
    Liquid-crystal copolyethers based on 7-oxa-bicyclo(2,2,1)heptane 失效
    基于7-OXA-BICYCLO(2,2,1)HEPTANE的液晶共聚物

    公开(公告)号:US5055547A

    公开(公告)日:1991-10-08

    申请号:US352678

    申请日:1989-05-10

    CPC分类号: C08G65/16 C09K19/3814

    摘要: The present invention relates to copolyethers comprising copolymers of 7,oxa-bicyclo(2,2,1)heptane, and its alkyl-derivatives, with one or more single-ring or condensed-rings cycloaliphatic ethers, comprising the characteristic group; ##STR1## wherein R' is hydrogen and R" is H, a halogen, or an alkyl radical containing a small number of carbon atoms, and which may also be halogen-substituted.If the ether contains one ring only, it contains from 5 to 12 atoms in the ring, and if it contains a condensed-ring system, it contains a total number of from 10 to 18 atoms in the rings.Those copolyethers show a anisotropic behaviour in the molten state, and therefore have liquid-crystal properties.

    摘要翻译: 本发明涉及包含7,氧杂双环(2,2,1)庚烷及其烷基衍生物的共聚物与包含该特征基团的一个或多个单环或稠环脂环族醚的共聚醚; 其中R'是氢,R“是H,卤素或含有少量碳原子的烷基,也可以是卤素取代的。 如果醚仅含有一个环,则它在环中含有5至12个原子,如果它含有稠环体系,则其中环的总数为10至18个原子。 这些共聚醚在熔融状态下显示出各向异性的特性,因此具有液晶性。

    Substituted aromatic polymers
    45.
    发明授权
    Substituted aromatic polymers 失效
    取代的芳族聚合物

    公开(公告)号:US5008352A

    公开(公告)日:1991-04-16

    申请号:US307563

    申请日:1989-02-08

    申请人: Brian N. Hendy

    发明人: Brian N. Hendy

    CPC分类号: C08G65/48 B01D71/52 B01D71/68

    摘要: An aryl-ether and/or thioether polymer contains aromatic rings linked to neighboring units Ph X Ph (when Ph is paraphenylene and X is SO.sub.2 and/or CO) through O and/or S and/or a direct link, at least some of said aromatic rings carrying a nuclear suphonamide group having N-aliphatic substitution, preferably with a cationic amino or quaternary ammonium group.A process for making aromatic polymer sulphonyl halides and, thus also sulphonamides, of very low sulphonic acid content, is characterized by working up in substantially anhydrous conditions the mixture resulting from the reaction of an inorganic halide with the corresponding sulphonic acid or salt thereof. The polymer sulphonamides are suitable for separation technologies, especially purification of water by reverse osmosis.

    Process for the production of polytetramethylene ether glycol
    50.
    发明授权
    Process for the production of polytetramethylene ether glycol 失效
    生产聚四亚甲基醚二醇的方法

    公开(公告)号:US4209641A

    公开(公告)日:1980-06-24

    申请号:US966657

    申请日:1978-12-05

    CPC分类号: C08G65/20 C08G18/4854

    摘要: An improved process for the production of polytetramethylene ether glycol is disclosed. Polytetramethylene ether glycol is obtained with a high yield by subjecting tetrahydrofuran to ring opening polymerization in the presence or absence of an organic solvent with the use of, as a catalyst, a lithium halide in conjunction with fuming sulfuric acid. Average molecular weight of the glycol product can be controlled in the range of 1000-3000 at will by varying the amounts of the lithium halide and fuming sulfuric acid used.

    摘要翻译: 公开了改进的制备聚四亚甲基醚二醇的方法。 通过在有机溶剂存在或不存在下,使用卤代卤化物与发烟硫酸作为催化剂,使四氢呋喃进行开环聚合,从而获得高收率的聚四亚甲基醚二醇。 通过改变所用的卤化锂和发烟硫酸的量,二醇产物的平均分子量可以随意控制在1000-3000的范围内。