公开(公告)号：US3907881A

公开(公告)日：1975-09-23

申请号：US31686272

申请日：1972-12-20

Applicant: STANDARD OIL CO OHIO

Inventor： KUHLMANN GEORGE E

IPC: C07C51/265 ,  C07C51/33 ,  C07C63/26

CPC classification number: C07C51/265

Abstract: Phthalic acids of improved quality are obtained direct from oxidation of xylenes with molecular oxygen in oxidation zone having co-oxidizable organic acid present in addition to a liquid phase acetic acid solution of one or more heavy metal oxidation catalyst and bromine releasing bromide compound. Particularly useful co-oxidizable organic acids are those which co-oxidize with the xylene to reactive primary radicals, such as sebacic, stearic or phenylacetic acids. Such quality improvement is manifested by decreased aldehydic acid and toluic acid impurity contaminants in recovered phthalic acid.

Abstract translation: 除了一种或多种重金属氧化催化剂和溴释放溴化物的液相乙酸溶液之外，还可以直接从具有共氧化有机酸的氧化区中的分子氧氧化二甲苯获得质量提高的邻苯二甲酸。 特别有用的可共氧化有机酸是与二甲苯共同氧化成反应性初级基团的那些，例如癸二酸，硬脂酸或苯乙酸。 这样的质量改善表现在回收的邻苯二甲酸中的醛酸和甲苯酸杂质污染物的降低。