申请人:OCCIDENTAL CHEMICAL CORPORATION
公开号:EP0417445A1
公开(公告)日:1991-03-20
Disclosed is a method of making ionized fluoroanthranilic acid from a fluorophthalic compound in a single pot process without isolating any intermediate product. A composition is prepared which which comprises an aqueous solution of water, a fluorophthalic compound selected from the group consisting of
and mixtures thereof, where "n" is 1 to 4, at a concentration of about 5 to about 30 percent by weight based on the water weight, and about 1 to about 1.5 equivalents of hydroxylamine or a mineral acid salt thereof. The pH of the composition is maintained at at least about 11 and the temperature of the composition is maintained at at least about 90°C. The unionized form of the acid is made by cooling below 50°C and lowering the pH to between about 4 and about 5. Also disclosed are the intermediate compounds, fluoro-N-hydroxyphthalimides, and a method of making them.
本发明公开了一种在不分离任何中间产物的情况下以单锅工艺从一种氟邻苯二甲酸化合物制取离子化氟邻苯二甲酸的方法。制备一种组合物,其中包括水的水溶液、选自以下组别的氟邻苯二甲酸化合物
及其混合物,其中 "n "为 1 至 4,浓度为约 5%至约 30%(以水重量为基准),以及约 1 至约 1.5 当量的羟胺或其矿物酸盐。组合物的 pH 值保持在至少约 11,组合物的温度保持在至少约 90°C。通过冷却至低于 50℃,并将 pH 值降至约 4 至约 5 之间,制得该酸的联合形式。 还公开了中间化合物氟-N-羟基邻苯二甲酰亚胺及其制造方法。