利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

311 条记录 (耗时 0.011 秒)

    Process for homopolymerizing acrylonitrile
    72.
    发明授权
    Process for homopolymerizing acrylonitrile 失效
    丙烯腈共聚合方法

    公开(公告)号：US3725373A

    公开(公告)日：1973-04-03

    申请号：US3725373D

    申请日：1970-01-12

    申请人： ATLANTIC RICHFIELD CO

    发明人： YOO J

    IPC分类号： C08F20/44 ,  C08F3/76

    CPC分类号： C08F20/44

    摘要： A process for the polymerization of acrylonitrile is provided using a catalyst which contains (A) an iron source, (B) an electron donor ligand, and (C) a reducing agent, in molar ratios of (B) to (A) of about 0.3 to 10:1 and of (C) to (A) of about 3 to 50:1. Preferred catalyst components are ferric acetylacetonate, bis(diphenylphosphino)-ethane and triethylaluminum.

    摘要翻译： 使用包含（A）铁源，（B）电子给体配体和（C）还原剂的催化剂提供丙烯腈聚合方法，（C）还原剂，摩尔比（B）与（A）的摩尔比约为 （C）〜（A）为3〜50:1。 优选的催化剂组分是乙酰丙酮铁，双（二苯基膦基） - 乙烷和三乙基铝。

    Method of producing allylthioacetic acid
    73.
    发明授权
    Method of producing allylthioacetic acid 失效
    生产乙酸的方法

    公开(公告)号：US3723519A

    公开(公告)日：1973-03-27

    申请号：US3723519D

    申请日：1972-03-16

    申请人： PORTNYAGINA V ,  MORGUN M

    发明人： PORTNYAGINA V ,  MORGUN M

    IPC分类号： C08F20/44 ,  C07C149/20

    CPC分类号： C08F20/44 ,  C07C323/00

    摘要： The method of producing allylthioacetic acid resides in that allyl bromide is reacted with thiourea at a temperature of 60* to 120* C, then monochloracetic acid is added to the resulting allylisothiouronium bromide and the mixture is heated at a temperature of 60* to 120* C in an alkaline medium, with subsequent isolation of the resulting desired product. Allylthioacetic acid thus produced finds application as a catalyst for acrylonitrile polymerization, for synthesizing other high molecular compounds, as well as for producing new kinds of penicillin and in the synthesis of a number of medicinal preparations.

    摘要翻译： 制备烯丙基硫代乙酸的方法在于烯丙基溴与硫脲在60〜120℃的温度下反应，然后向所得的烯丙基异硫脲溴化物中加入一氯乙酸，将混合物在60〜120℃的温度下加热 在碱性介质中，随后分离得到的所需产物。

    Acrylonitrile polymerization in the presence of sulfuric acid followed by a neutralization step
    74.
    发明授权
    Acrylonitrile polymerization in the presence of sulfuric acid followed by a neutralization step 失效
    存在硫酸的丙烯腈聚合在中和步骤之后

    公开(公告)号：US3634370A

    公开(公告)日：1972-01-11

    申请号：US3634370D

    申请日：1969-07-14

    申请人： GAETANO F D ALELIO

    发明人： ALELIO GAETANO F D

    IPC分类号： C08F20/44 ,  C08F3/76 ,  C08F15/22

    CPC分类号： C08F20/44 ,  C08F2/36

    摘要： THIS INVENTION COMPRISES AN IMPROVED PROCESS FOR THE PRODUCTION OF SUBSTANTIALLY COLORLESS POLYMERS OF ACRYLONITRILE BY POLYMERIZATION IN ORGANIC SOLVENTS CAPABLE OF DISSOLVING POLYMERS CONTAINING AT LEAST 60% OF ACRYLONITRILE AND EVEN 80% OR MORE ACRYLONITRILE, THIS POLYMERIZATION BEING EFFECTED BY A FREE RADICAL MECHANISM IN THE PRESENCE OF 0.01 TO 1.75% SULFURIC ACID OF THE WEIGHT OF ACRYLONITRILE MONOMER PORTION IN SOLUTION, THEREAFTER NEUTRALIZING THE SULFURIC ACID TO FORM A SULFATE DERIVATIVE WHICH IS INSSOLUBLE IN THE POLYMER SOLUTION, AND REMOVING SAID INSOLUBLE SULFATE.

    Process for the production of spinnable acrylonitrile polymer solutions
    77.
    发明授权
    Process for the production of spinnable acrylonitrile polymer solutions 失效
    用于生产可旋转丙烯腈聚合物溶液的方法

    公开(公告)号：US3505266A

    公开(公告)日：1970-04-07

    申请号：US3505266D

    申请日：1967-05-08

    申请人： BAYER AG

    发明人： SULING CARLHANS ,  KRAMER DIETER ,  UNBEHEND MANFRED

    IPC分类号： C08F20/44 ,  D01F6/18 ,  C08F1/76 ,  C08F3/76

    CPC分类号： D01F6/18 ,  C08F2/36 ,  C08F20/44

    摘要： A solution of an acrylonitrile polymer is produced by polymerizing acrylonitrile in an organic solvent for polyacrylonitrile, at a temperature of from + 10 DEG to - 68 DEG C. in the presence of 0.1 m.mol. to 0.1 mol., per mol. of monomer, of an alkali metal salt of an aliphatic or cycloaliphatic sulphonamide of the formula wherein M represents Li, Na, K, Rb or Cs, R1 represents an alkyl or cycloalkyl radical and R2 represents an alkyl radical. Specified salts are those of N-methyl, N-isopropyl or N-isobutyl methane sulphonamide, N-methyl n-butane sulphonamide, N - n - propyl ethane sulphonamide, N-methyl cyclohexane sulphonamide and long-chain aliphatic sulphonamides. Suitable solvents are dimethyl formamide and dimethyl sulphoxide. In examples, dimethyl formamide solutions of polyacrylonitrile are produced using potassium N-methyl or N-isobutyl methane sulphonamide or lithium N-isobutyl or N-isopropyl sulphonamide. The catalyst is deactivated with HCl or toluene sulphonic acid.