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Improvements in 1995 for the preparation of isophthalic acid or of terephthalic acid by catalytic oxidation of meta - or para - xylene
Improvements in 1995 for the preparation of isophthalic acid or of terephthalic acid by catalytic oxidation of meta - or para - xylene
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机译:1995年对间或对二甲苯催化氧化制备间苯二甲酸或对苯二甲酸的改进。
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摘要
P preparation of isophthalic acid or of terephthalic acid by oxidation, respectively, meta - or para - xylene with molecular oxygen, at high temperatures and under conditions in the liquid phase in the presence of catalysts constituted by a combination of at least one oxidation catalyst based on transition metal (mn, co, this) and in the presence of a source of bromine. / p & & p & according to the invention, use is made of a liquid solvent system comprising essentially of benzoic acid and water in a proportion by weight of between 3% and approximately 15%. / p & & p & possibility of controlling an industrial scale, the value of the temperature of oxidation and to limit the fluctuations while obtaining a product which is very slightly coloured, a high degree of purity, quickly and at a high degree of conversion. / p
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