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公开(公告)号:US4500730A
公开(公告)日:1985-02-19
申请号:US454982
申请日:1983-01-03
申请人: Toru Tanaka , Masanori Hataya , Kazuo Tanaka , Yukio Sakai , Yasufumi Hamada
发明人: Toru Tanaka , Masanori Hataya , Kazuo Tanaka , Yukio Sakai , Yasufumi Hamada
IPC分类号: C07C51/255 , B01J19/02 , B01J27/00 , C07B61/00 , C07C51/00 , C07C51/265 , C07C63/00 , C07C63/26 , C07C63/307 , C07C67/00 , C07C51/235
CPC分类号: C07C51/265 , B01J19/02 , B01J2219/024
摘要: An aromatic polycarboxylic acid is produced by oxidation of an alkyl-substituted aromatic aldehyde or carboxyLic acid with molecular oxygen in water as a solvent in the presence of bromine ions or further together with heavy metal ions as a catalyst in a reactor using a zirconium material whose surface is coated with an oxide layer as a material of construction. The oxidation can be carried out in high yield without corrosion of the material of construction.
摘要翻译: 通过在溴离子存在下,用作为溶剂的水中的分子氧在烷基取代的芳香族醛或羧酸中的氧化作为催化剂进一步与重金属离子作为催化剂,在反应器中使用锆材料氧化芳族多元羧酸, 表面涂有作为结构材料的氧化物层。 氧化可以高产率地进行而不会腐蚀构造材料。
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公开(公告)号:US4490554A
公开(公告)日:1984-12-25
申请号:US454595
申请日:1982-12-30
申请人: Toru Tanaka , Masanori Hataya , Kazuo Tanaka
发明人: Toru Tanaka , Masanori Hataya , Kazuo Tanaka
IPC分类号: C07C51/00 , C07C51/43 , C07C63/307 , C07C63/313 , C07C67/00
CPC分类号: C07C51/43
摘要: In crystallizing and separating trimellitic acid obtained by the oxidation of dimethylbenzaldehyde or its oxidation derivative with a molecular oxygen-containing gas in an aqueous solvent in the presence of a bromine ion or a bromine ion and a heavy metallic ion catalyst, a process for crystallizing trimellitic acid wherein the crystallization is carried out with at least two crystallization vessels connected in series, of which the first vessel is kept at a temperature of 40.degree. to 130.degree. C. and at a concentration of trimellitic acid of 20 to 60 wt. %.
摘要翻译: 在溴离子或溴离子和重金属离子催化剂存在下,通过在含水溶剂中的含氧气体氧化二甲基苯甲醛或其氧化衍生物得到的偏苯三酸结晶和分离, 酸,其中结晶通过串联连接的至少两个结晶容器进行结晶,其中第一容器保持在40至130℃的温度和偏苯三酸浓度为20至60wt。 %。
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