Catalytic procedure for the preparation of organic carbonates
    41.
    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:US5457213A

    公开(公告)日:1995-10-10

    申请号:US73773

    申请日:1993-06-08

    摘要: Catalytic procedure for the preparation of an organic carbonate having general formula (I): ##STR1## wherein R represents a C.sub.1 -C.sub.10 alkyl radical, linear or branched, or a C.sub.5 -C.sub.8 cycloalkyl radical; or of a cyclic organic carbonate having general formula (II): ##STR2## wherein R' represents a C.sub.2 -C.sub.5 alkylene radical, linear or branched; including the reacting of an aliphatic or cyclo-aliphatic alcohol having general formula (III):R--OH (III)or an aliphatic diol having general formula (IV):HO--R'--OH (IV)wherein R and R' have the meaning described above, with carbon monoxide and oxygen, in the presence of a catalyst composed of a cobalt(II) or cobalt(III) ion and an organic binder containing at least one oxygen atom, characterized in that the process is carried out in the presence of at least one reaction coadjuvant selected from the following groups of linear or cyclic compounds: ureas, nitriles, amides, phosphoramides, sulphones, sulphoxides, carbamates.

    摘要翻译: 用于制备具有通式(I)的有机碳酸酯的催化方法:其中R表示直链或支链的C 1 -C 10烷基或C 5 -C 8环烷基; 或具有通式(II)的环状有机碳酸酯:其中R'表示直链或支链的C 2 -C 5亚烷基; 包括具有通式(III)的脂族或环脂族醇:R-OH(III)或具有通式(IV)的脂族二醇:HO-R'-OH(IV)其中R和R'具有 在由钴(II)或钴(III)离子组成的催化剂和含有至少一个氧原子的有机粘合剂存在下,用上述一氧化碳和氧气的含义,其特征在于该方法在 至少一种选自以下一组线性或环状化合物的反应助剂的存在:脲,腈,酰胺,磷酰胺,砜,亚砜,氨基甲酸酯。

    Continuous process for preparing di-alkyl carbonates
    43.
    发明授权
    Continuous process for preparing di-alkyl carbonates 失效
    连续制备碳酸二烷基酯的方法

    公开(公告)号:US5159099A

    公开(公告)日:1992-10-27

    申请号:US742061

    申请日:1991-08-06

    CPC分类号: C07C68/005

    摘要: A continuous process is described for preparing a di-alkyl carbonate, e.g. dimethylcarbonate, via oxidative carbonylation of the corresponding alkanol, e.g. methanol, in the presence of a catalyst system containing a copper alkoxy-halide and water with a mole ratio of the water to the copper salt of between 0.25 and 2.0 and preferably between 0.5 and 1. In this manner extremely high di-alkyl carbonate formation rates are obtained.

    摘要翻译: 描述了制备碳酸二烷基酯的连续方法,例如 碳酸二甲酯,通过相应的链烷醇的氧化羰基化反应。 甲醇,在含有铜烷氧基卤化物和水的催化剂体系存在下,水与铜盐的摩尔比为0.25-2.0,优选0.5-1。在这种情况下,极高的二烷基碳酸酯形成 费率得到。

    Process for preparing organic glasses
    44.
    发明授权
    Process for preparing organic glasses 失效
    制备有机眼镜的方法

    公开(公告)号:US5128384A

    公开(公告)日:1992-07-07

    申请号:US751648

    申请日:1991-08-26

    摘要: Organic glasses and surface coatings are prepared, with short hardening cycles, by submitting to the action of U.V. light a liquid polymerizable composition containing at least one di-(allyl carbonate) or poly(allyl carbonate) of a diol or polyol, a photoinitiator and a vinyl ester monomer and/or an organic peroxide.The composition can additionally contain small amounts of an organic compound selected from among those compounds which are used in the art in order to stabilize the organic polymers to the degrading action of U.V. light.The composition is preferably heated before being treated with U.V. light.

    摘要翻译: 制备有机玻璃和表面涂层,具有短的硬化周期,通过提交U.V.的作用。 点亮含有二醇或多元醇,光引发剂和乙烯基酯单体和/或有机过氧化物的至少一种二(碳酸烯丙酯)或聚(碳酸烯丙酯)的液体可聚合组合物。 该组合物可以另外含有少量的选自本领域中使用的那些化合物中的有机化合物,以便将有机聚合物稳定到紫外线的降解作用。 光。 组合物优选在用紫外线处理之前加热。 光。

    Process for preparing alkyl isocyanates
    46.
    发明授权
    Process for preparing alkyl isocyanates 失效
    烷基异氰酸酯的制备方法

    公开(公告)号:US4514339A

    公开(公告)日:1985-04-30

    申请号:US608984

    申请日:1984-05-10

    CPC分类号: C07C263/04

    摘要: Process for the production of alkyl isocyanates which can be defined by the general formula: R--N.dbd.C.dbd.O wherein R is an alkyl radical having from 1 to 4 carbon atoms by thermal decomposition of phenyl-N-alkyl urethans which can be defined by the general formula: ##STR1## wherein R has the above defined meaning. Said thermal decomposition is carried out without any substance having a catalytic activity being present in the decomposition reaction, by heating to a temperature of from 180.degree. C. to 210.degree. C. under the atmospherical pressure or a slightly reduced pressure, a mixture of phenol and phenyl-N-alkyl urethan, in a molar ratio of the former to the latter equal to or nearly equal to 1:1, removing by vaporization the phenol and the alkyl isocyanate from said vaporized products and maintaining in the reaction mixture, substantially throughout the thermal decomposition a molar ratio of phenol to phenyl-N-alkyl urethan not lower than about 1:1.

    摘要翻译: 制备烷基异氰酸酯的方法,其可以由通式RN = C = O定义,其中R是通过苯基-N-烷基氨基甲酸酯的热分解具有1至4个碳原子的烷基,其可以由 通式:其中R具有上述定义的含义。 所述热分解在没有任何具有催化活性的物质在分解反应中进行,通过在大气压或稍微减压下加热至180℃至210℃的温度,苯酚 和苯基-N-烷基氨基甲酸酯以前者与后者的摩尔比等于或几乎等于1:1,通过蒸发从所述汽化产物中蒸发苯酚和异氰酸烷基酯并基本上保持在反应混合物中 苯酚与N-烷基氨基甲酸酯的摩尔比热分解不低于约1:1。

    Process for the production of 2,6-dimethylnaphthalene
    49.
    发明授权
    Process for the production of 2,6-dimethylnaphthalene 有权
    生产2,6-二甲基萘的方法

    公开(公告)号:US07812204B2

    公开(公告)日:2010-10-12

    申请号:US11576412

    申请日:2005-11-30

    IPC分类号: C07C5/27 C07C6/12 C07C2/64

    摘要: The invention relates to a multi-step chemical transformation process for the production of 2,6-dimethylnaphthalene starting from one or more naphthalene hydrocarbons or hydrocarbon blends containing the same, one or more benzene hydrocarbons and, optionally, a methylating agent reacted in the presence of a catalyst containing a zeolite belonging to the MTW structural group, where hydrogen is fed in at least one of the steps.

    摘要翻译: 本发明涉及从一种或多种萘烃或含有它们的烃共混物,一种或多种苯烃和任选的甲基化剂在存在下反应的生产2,6-二甲基萘的多步化学转化方法 的含有属于MTW结构基团的沸石的催化剂,其中在至少一个步骤中进料氢。

    Use of dialkyl carbonates as solvents for expanded polystyrene
    50.
    发明授权
    Use of dialkyl carbonates as solvents for expanded polystyrene 有权
    使用碳酸二烷基酯作为发泡聚苯乙烯的溶剂

    公开(公告)号:US07745503B2

    公开(公告)日:2010-06-29

    申请号:US10566401

    申请日:2004-08-31

    IPC分类号: C08J11/04

    摘要: The invention relates to the use of dialkyl carbonates as solvents for expanded polystyrene and to a new process for the recycling of expanded polystyrene. Said process comprises the volume reduction of expanded polystyrene by dissolution with a dialkyl carbonate, or a blend of dialkyl carbonates, the removal of the insoluble components by filtration, the selective precipitation of polystyrene with a non-solvent or a blend of non-solvents, the separation, drying and extrusion of the precipitated polystyrene. This process allows the recovery of pure polystyrene without altering its properties.

    摘要翻译: 本发明涉及碳酸二烷基酯作为发泡聚苯乙烯的溶剂的用途以及用于再发泡聚苯乙烯的新方法。 所述方法包括通过用碳酸二烷基酯或碳酸二烷基酯的共混物溶解来发泡聚苯乙烯的体积减少,通过过滤除去不溶性组分,用非溶剂或非溶剂的共混物选择性沉淀聚苯乙烯, 沉淀聚苯乙烯的分离,干燥和挤出。 该方法允许回收纯聚苯乙烯而不改变其性质。