Process for removing silanes from by-product stream
    5.
    发明公开
    Process for removing silanes from by-product stream 失效
    Verfahren zur Entfernung von Silanen aus einem Nebenproduktstrom

    公开(公告)号:EP0748810A1

    公开(公告)日:1996-12-18

    申请号:EP96304055.5

    申请日:1996-06-04

    IPC分类号: C07F7/20 C07F7/12

    摘要: A process is described for treating a by-product stream, resulting from the commercial manufacture of methylchlorosilanes, to remove residual silanes wherein the residual silanes comprise low-boiling hydrosilanes. The process comprises a first step where the by-product stream is contacted with hydrogen chloride in the presence of a chlorination catalyst to convert the low-boiling hydrosilanes to chlorosilanes. In a second step, the modified by-product stream comprising the chlorosilanes is contacted with activated carbon which adsorbs higher-boiling silanes including chlorosilanes, thereby forming a final by-product stream reduced in lower-boiling hydrosilanes and in total silanes. The present process is especially useful for removing silanes from by-product streams intended for incineration, thus reducing silica during combustion of the by-product stream in the incinerator.

    摘要翻译: 处理副产品 包含硅烷的流包括:(a)使包含式为MexSiH 4-x的低沸点氢化硅烷(Me为甲基,x为0-2)的物流与化学计量比接触。 的氯化催化剂存在下形成改性副产物。 流包含氯硅烷; (b)与活化的C接触以吸收氯硅烷; 和(c)恢复最终副产品。 流降低了低沸点氢硅烷含量。 要求进一步的处理。

    Hydrochlorination process for converting high-boiling residue from direct process to monosilanes
    7.
    发明公开
    Hydrochlorination process for converting high-boiling residue from direct process to monosilanes 失效
    将所述直接合成的高沸点残余物的氢氯化

    公开(公告)号:EP0829484A2

    公开(公告)日:1998-03-18

    申请号:EP97114649.3

    申请日:1997-08-23

    IPC分类号: C07F7/12

    CPC分类号: C07F7/16 C07F7/125 C07F7/128

    摘要: A hydrochlorination process is claimed herein for production of monosilanes from the high-boiling residue obtainable from the reaction of organochlorides with silicon in a process known as the "direct process". Our process comprises (A) forming a mixture of said high-boiling residue and an organosilane and (B) contacting said mixture with hydrogen chloride in the presence of a catalytic amount of a catalyst composition effective in the formation of monosilanes from said high-boiling residue. A preferred catalyst composition comprises aluminum trichloride, at least a portion of which may be formed, in situ , during conduct of the direct process and isolation of said high-boiling residue.

    Conversion of high-boiling residue from direct process to monosilanes
    8.
    发明公开
    Conversion of high-boiling residue from direct process to monosilanes 失效
    在单硅烷直接合成的高沸点残余物的实施

    公开(公告)号:EP0812851A2

    公开(公告)日:1997-12-17

    申请号:EP97303502.5

    申请日:1997-05-22

    IPC分类号: C07F7/12 C07F7/16

    CPC分类号: C07F7/128 C07F7/16

    摘要: A process for the production of monosilanes from the high-boiling residue resulting from the reaction of organochlorides with silicon metalloid in a process typically referred to as the "direct process." The present process comprises forming a mixture comprising an organosilane and the high-boiling residue and contacting the mixture in the presence of hydrogen gas with a catalytic amount of a catalyst composition effective in promoting the formation of monosilanes from the high-boiling residue. A preferred catalyst composition comprises aluminum trichloride, at least a portion of which may be formed in situ during conduct of the direct process and isolation of the high-boiling residue.

    Process for converting high-boiling residue from direct process to monosilanes
    9.
    发明公开
    Process for converting high-boiling residue from direct process to monosilanes 失效
    将直接过程的高沸点残余物转化为甲硅烷的方法

    公开(公告)号:EP0812850A2

    公开(公告)日:1997-12-17

    申请号:EP97303501.7

    申请日:1997-05-22

    IPC分类号: C07F7/12 C07F7/16

    CPC分类号: C07F7/16 C07F7/128

    摘要: Described herein is a process for the production of monosilanes from the high-boiling residue resulting from the reaction of organochlorides with silicon metalloid in a process typically referred to as the "direct process." The process comprises contacting a mixture comprising the high-boiling residue, an organotrichlorosilane and hydrogen chloride with a catalytic amount of catalyst composition effective in promoting the formation of monosilanes from said residue. A preferred catalyst composition comprises aluminum trichloride, at least a portion of which is formed in situ during conduct of the direct process and isolation of the high-boiling residue. Typically, the monosilane product of the present process comprises almost exclusively methyltrichlorosilane and tetrachlorosilane.

    摘要翻译: 本文描述了由通常称为“直接法”的方法中由有机氯化物与硅准金属反应产生的高沸点残余物生产甲硅烷的方法。 该方法包括使包含高沸点残余物,有机三氯硅烷和氯化氢的混合物与有效促进所述残余物形成甲硅烷类的催化量的催化剂组合物接触。 优选的催化剂组合物包含三氯化铝,其至少一部分在进行直接过程和分离高沸点残余物期间原位形成。 通常,本发明方法的甲硅烷产物几乎全部包含甲基三氯硅烷和四氯硅烷。

    Process for preparation of cyclic organohydrosiloxanes
    10.
    发明公开
    Process for preparation of cyclic organohydrosiloxanes 失效
    有机氢硅氧烷(Verbahren zur Herstellung von cyclischen)有机硅氧烷。

    公开(公告)号:EP0590773A1

    公开(公告)日:1994-04-06

    申请号:EP93306433.9

    申请日:1993-08-16

    IPC分类号: C07F7/21 C08G77/36

    CPC分类号: C08G77/36 C07F7/21

    摘要: The present invention is a process for preparation of cyclic organohydrosiloxanes. The process comprises contacting an organohydrodihalosilane with a near stoichiometric quantity of water to form a mixture containing cyclic and short-chain linear organohydrosiloxanes. This mixture is distilled to separate the cyclic and short-chain linear organohydrosiloxanes from other components of the mixture. The separated cyclic and short-chain linear organohydrosiloxanes are then contacted with an additional quantity of water to effect hydrolysis and condensation of the short-chain linear organohydrosiloxanes to higher molecular weight linear organohydrosiloxanes which are easily separated from the cyclic organohydrosiloxanes by a second distillation step.

    摘要翻译: 本发明是制备环状有机氢硅氧烷的方法。 该方法包括使有机氢二卤硅烷与近化学计量的水接触以形成含有环状和短链线性有机氢硅氧烷的混合物。 将该混合物蒸馏以从混合物的其它组分中分离环状和短链线性有机氢硅氧烷。 然后将分离的环状和短链线性有机氢硅氧烷与额外量的水接触以实现短链线性有机氢硅氧烷与较高分子量线性有机氢硅氧烷的水解和缩合,其通过第二蒸馏步骤容易地与环状有机氢硅氧烷分离。