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    Process for preparing organic acids
    34.
    发明授权
    Process for preparing organic acids 失效
    制备有机酸的方法

    公开(公告)号：US4195186A

    公开(公告)日：1980-03-25

    申请号：US924054

    申请日：1978-07-12

    申请人： Johann G. D. Schulz ,  Edward T. Sabourin

    发明人： Johann G. D. Schulz ,  Edward T. Sabourin

    IPC分类号： C07C51/31 ,  C07C51/20

    CPC分类号： C07C51/316

    摘要： A process for preparing a mixture of polycyclic aromatic polycarboxylic acids that is substantially soluble in acetone but substantially insoluble in water which comprises subjecting a slurry containing coal to reaction with aqueous nitric acid in an atmosphere containing molecular oxygen, mechanically separating the solids in the resulting slurry, extracting the resulting solids with a polar solvent to separate therefrom a mixture of polycyclic aromatic polycarboxylic acids substantially soluble in acetone but substantially insoluble in water and a mixture of polycyclic aromatic polycarboxylic acids substantially insoluble in acetone and substantially insoluble in water.

    摘要翻译： 一种制备基本上可溶于丙酮但基本上不溶于水的多环芳族多元羧酸的混合物的方法，该方法包括使含有煤的浆料在含有分子氧的气氛中与硝酸水溶液反应，将得到的浆料中的固体机械分离 用极性溶剂萃取所得固体，从而分离出基本上不溶于丙酮但基本上不溶于水的多环芳族多羧酸混合物和基本上不溶于丙酮的多环芳族多元羧酸混合物，基本上不溶于水。

    Process for the production of fiber grade terephthalic acid
    38.
    发明授权
    Process for the production of fiber grade terephthalic acid 失效
    生产纤维级联过硫酸的方法

    公开(公告)号：US3846487A

    公开(公告)日：1974-11-05

    申请号：US19446871

    申请日：1971-11-01

    申请人： MARUZEN OIL CO LTD

    发明人： SHIGEYASU M ,  KUIHARA K ,  KUKI M

    IPC分类号： B01J19/08 ,  B01J27/08 ,  B01J27/128 ,  B01J31/04 ,  B01J37/04 ,  C07C51/265 ,  C07C63/26 ,  C07C51/20

    CPC分类号： B01J37/04 ,  B01J19/088 ,  B01J27/08 ,  B01J27/128 ,  B01J31/04 ,  B01J2231/70 ,  B01J2531/72 ,  B01J2531/845 ,  C07C51/265 ,  Y02P20/52 ,  C07C63/26

    摘要： A process for producing fiber grade terephthalic acid by subjecting p-xylene to a liquid phase oxidation with oxygen or an oxygen-containing gas in the presence of an oxidation catalyst comprising cobalt, manganese and bromine and in the presence of a lower aliphatic carboxylic acid solvent, said catalyst comprising: (a) the amount of cobalt is in the range of 0.05 0.50 percent by weight based on the solvent, (b) the amount of the manganese is in the range of 1 - 20 percent by weight based on cobalt, (c) the source of bromine is cobalt bromide, free bromine, or a mixture thereof, and (d) the weight ratio of bromine to cobalt is in the range of 1.5:1 - 6.0: 1. Terephthalic acid thus obtained can be used as a raw material of direct polymerization with glycols for providing high quality polyester.

    摘要翻译： 一种在含有钴，锰和溴的氧化催化剂存在下，在低级脂族羧酸溶剂存在下，用氧或含氧气体对对二甲苯进行液相氧化生产纤维级对苯二甲酸的方法 ，所述催化剂包括：（a）钴的用量相对于溶剂为0.05-0.50％（重量），（b）锰的量为1-20％（重量），基于钴 ，（c）溴源是溴化钴，游离溴或其混合物，（d）溴与钴的重量比在1.5:1至6.0:1的范围内。如此获得的对苯二甲酸可以是 用作直接聚合的二醇用于提供高品质聚酯的原料。