中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

172 records (took 0.02 seconds)

    Process for recovery of pure acetonitrile
    4.
    发明授权
    Process for recovery of pure acetonitrile 失效
    回收纯乙腈的方法

    公开(公告)号：US3870746A

    公开(公告)日：1975-03-11

    申请号：US21784372

    申请日：1972-01-14

    Applicant: DEGUSSA

    Inventor： LUSSLING THEODOR ,  SCHREYER GERD ,  THEISSEN FERDINAND ,  WEIGERT WOLFGANG

    IPC: C07C20060101 ,  C07C121/18 ,  C07C121/32

    CPC classification number: C07C255/00 ,  Y10S203/03

    Abstract: Pure acetonitrile is recovered from aqueous acetonitrile by extracting with an organic solvent which has little miscibility with water, boils higher than acetonitrile and does not form an azeotrope with acetonitrile. The portion of the extract boiling up to 76*C is distilled off. The remaining acetonitrile containing more difficulty volatile portion is freed from the residual water by addition of an entraining agent and recovering the pure acetonitrile by a fractional distillation.

    Abstract translation: 通过用与水混溶性小的有机溶剂提取，从乙腈水溶液中回收纯乙腈，沸点高于乙腈，不与乙腈形成共沸物。 将沸腾至76℃的提取物部分蒸馏掉。 通过加入夹带剂将含有更难挥发性部分的剩余乙腈从残余水中除去，并通过分馏回收纯乙腈。

    Process for production of cyanuric chloride
    7.
    发明授权
    Process for production of cyanuric chloride 失效
    氰尿酰氯生产工艺

    公开(公告)号：US3925377A

    公开(公告)日：1975-12-09

    申请号：US48345474

    申请日：1974-06-26

    Applicant: DEGUSSA

    Inventor： GEIGER FRIEDHELM ,  HEIMBERGER WERNER ,  SCHREYER GERD ,  WEIGERT WOLFGANG

    IPC: C07D251/28

    CPC classification number: C07D251/28

    Abstract: There is provided a process for the recovery of liquid cyanuric chloride from a mixture formed by the trimerization of cyanogen chloride in a trimerization reactor with subsequent fractionation of said mixture comprising conducting the mixture in an at least partially gaseous condition at 146* to 500*C. to a column system, bringing said mixture in a first fractionating column into contact with a solvent for cyanuric chloride having a boiling point between that of cyanogen chloride and that of cyanuric chloride and which is stable to cyanuric chloride, cyanogen chloride, chlorine and hydrogen chloride, recovering condensed liquid cyanuric chloride from the bottom of said first column at a temperature above the boiling point of said solvent, removing the distillate mixture containing solvent, cyanogen chloride, chlorine and any carbon dioxide, nitrogen and hydrogen chloride from the top of said first column, partially condensing a portion of said distillate and returning said partial condensate to the top of the first fractionating column, leading the solvent containing residual gas of chlorine, cyanogen chloride and any carbon dioxide, nitrogen and hydrogen chloride present to a second fractionating column adding sufficient liquid cyanogen chloride to the top of said second column to maintain a reflux in the top of said second column, removing a mixture of chlorine and cyanogen chloride and any carbon dioxide, nitrogen and hydrogen chloride free of said solvent from the top of said second column, returning the chlorine and cyanogen chloride to the trimerization reactor, insuring that the gas entering said reactor contains at least 50 weight percent cyanogen, collecting chlorine and cyanogen chloride free solvent in the bottom of the second column and returning it to the top of the first fractionating column.

    Abstract translation: 提供了一种从三氯化反应器中氯化氰三氯甲烷形成的混合物回收液态氰尿酰氯的方法，随后分馏所述混合物，包括在146℃至500℃下至少部分气态条件下进行混合 将所述混合物置于第一分馏塔中，与氰化氯和氰尿酰氯之间的沸点的氰尿酰氯溶剂接触，并且对氰尿酰氯，氯化氰，氯和氢稳定 氯化物，在所述溶剂的沸点以上的温度下从所述第一塔的底部回收冷凝的液体氰尿酰氯，从所述溶剂的顶部除去含有溶剂，氯化氰，氯和任何二氧化碳，氮和氯化氢的馏出物混合物 第一列，部分地冷凝所述馏出物的一部分并返回所述部分 将冷凝物导入第一分馏塔的顶部，导致含有残留气体的氯，氯化氰和任何二氧化碳，氮和氯化氢的溶剂存在于第二分馏塔中，向第二塔的顶部加入足够的液态氯化氰至 在所述第二塔的顶部保持回流，从所述第二塔的顶部除去氯和氯化氰以及不含所述溶剂的任何二氧化碳，氮和氯化氢的混合物，将氯和氯化氰返回到三聚反应器 确保进入所述反应器的气体含有至少50重量％的氰，在第二塔的底部收集氯和不含氯化氰的溶剂并将其返回到第一分馏塔的顶部。

    Process for the production of pure n-alkyl formamides
    8.
    发明授权
    Process for the production of pure n-alkyl formamides 失效
    制备纯正烷基甲酰胺的方法

    公开(公告)号：US3879457A

    公开(公告)日：1975-04-22

    申请号：US28454572

    申请日：1972-08-29

    Applicant: DEGUSSA

    Inventor： HENSEL JORG ,  SCHAEFER GERD ,  SCHREYER GERD

    IPC: C07C231/06 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C231/10 ,  C07C233/03 ,  C07C103/30

    CPC classification number: C07C233/00

    Abstract: N-alkyl formamides or the corresponding N-cycloalkyl or Naralkyl formamaides are prepared by reacting olefins, cycloolefins or aralkenes with hydrogen cyanide in the Ritter reaction using about 2.5 moles of acid per mole of olefin at a temperature of 30* to 70* C. and the unneutralized acid reaction mixture is extracted with acid stable polar solvents and the extract is worked up in conventional manner.

    Abstract translation: N-烷基甲酰胺或相应的N-环烷基或N-芳烷基甲酰胺通过在Ritter反应中使烯烃，环烯烃或芳烯烃与氰化氢反应，使用约2.5摩尔酸/摩尔烯烃在30至70℃的温度下反应制备。 并用酸稳定的极性溶剂萃取未中和的酸反应混合物，并以常规方式处理提取物。

    Process for the production of hydrogen peroxide
    9.
    发明授权
    Process for the production of hydrogen peroxide 失效
    生产过氧化氢的方法

    公开(公告)号：US3699217A

    公开(公告)日：1972-10-17

    申请号：US3699217D

    申请日：1970-03-23

    Applicant: DEGUSSA

    Inventor： SCHREYER GERD ,  WEIBERG OTTO ,  WEIGERT WOLFGANG

    IPC: C01B15/023 ,  C01B15/02 ,  C07C49/68

    CPC classification number: C01B15/023

    Abstract: Esters of trialkyl acetic acids; preferably pivalic acid, with higher alkanols, glycols, phenols or cycloalkanols are employed as solvents for the reaction carriers in the anthraquinone process for preparing hydrogen peroxide.

    Abstract translation: 三烷基乙酸的酯; 优选新戊酸与较高级的链烷醇，二醇，酚或环烷醇用作用于制备过氧化氢的蒽醌方法中的反应载体的溶剂。

Patent Agency Ranking