Catalytic procedure for the preparation of organic carbonates
    71.
    发明授权
    Catalytic procedure for the preparation of organic carbonates 失效
    用于制备有机碳酸酯的催化方法

    公开(公告)号:US5322958A

    公开(公告)日:1994-06-21

    申请号:US20666

    申请日:1993-02-22

    摘要: Catalytic procedure in gas phase for the preparation of a symmetrical or asymmetrical organic carbonate having the general formula (I): ##STR1## wherein R and R', the same or different, represent a C.sub.1 -C.sub.4 alkyl radical, linear or branched, which includes reacting at least one alcohol having the general formula (II):R--OH or R'--OHwith carbon monoxide and oxygen in the presence of a catalyst composed of oxides, salts or complexes of cobalt.

    摘要翻译: 用于制备具有通式(I)的对称或不对称有机碳酸酯的气相中的催化过程:其中R和R'相同或不同,表示C1-C4烷基,线性或 其包括使由至少一种具有通式(II)的醇:R-OH或R'-OH与一氧化碳和氧在由钴的氧化物,盐或络合物组成的催化剂存在下反应。

    Process for the recycling of expanded polystyrene
    74.
    发明授权
    Process for the recycling of expanded polystyrene 有权
    膨胀聚苯乙烯回收工艺

    公开(公告)号:US07728047B2

    公开(公告)日:2010-06-01

    申请号:US11996075

    申请日:2006-06-28

    IPC分类号: C08J11/04

    摘要: The invention relates to an enhanced process for the recycling of expanded polystyrene. Said process essentially comprises the reduction in volume of expanded polystyrene by means of dissolution in a solvent, separation of the insoluble components, selective precipitation of the polystyrene with an anti-solvent, separation, drying and extrusion of the precipitated polystyrene, recovery by distillation and recycling of the solvent. The process is characterized in that the anti-solvent is a butanol selected form n-butanol, iso-butanol or sec-butanol and the solvent is dimethyl carbonate, alone or in a mixture containing up to 25% by weight of butanol.

    摘要翻译: 本发明涉及一种用于再发泡聚苯乙烯的增强方法。 所述方法基本上包括通过在溶剂中的溶解减少发泡聚苯乙烯的体积,分离不溶组分,用抗溶剂选择性沉淀聚苯乙烯,分离,干燥和挤出沉淀的聚苯乙烯,通过蒸馏回收和 回收溶剂。 该方法的特征在于,反溶剂是选自正丁醇,异丁醇或仲丁醇的丁醇,溶剂是单独的碳酸二甲酯或含至多25重量%丁醇的混合物。

    Vulcanizable compositions of nitrile rubbers
    80.
    发明授权
    Vulcanizable compositions of nitrile rubbers 失效
    丁腈橡胶的可硫化组合物

    公开(公告)号:US5580916A

    公开(公告)日:1996-12-03

    申请号:US209108

    申请日:1994-03-09

    CPC分类号: C08K5/109 C08L9/02 C08L69/00

    摘要: A description follows of vulcanizable compositions of nitrile rubbers containing a plasticizer, a vulcanizing agent and normal additives, wherein the plasticizer is an organic carbonate selected from those which can be defined with the formula (I): ##STR1## or with the formula (II): ##STR2## wherein R, R.sup.1, R.sup.2, X and n are as defined in the description.

    摘要翻译: 以下描述可含有增塑剂,硫化剂和常规添加剂的丁腈橡胶的可硫化组合物,其中增塑剂是选自可由式(I)定义的那些的有机碳酸酯:E>(II)其中R,R 1 ,R2,X和n如说明书中所定义。