反应详情

温度

240 °C

A stainless steel pressure autoclave is charged with 150 parts of kerosene and 32 parts of sodium carbonate and heated to 240° C. It is then pressurized with 10 bar of carbon dioxide. Over the course of 6 hours, 50 parts of sodium β-naphtholate are metered in as a suspension in kerosene via a metering pump, part of the kerosene being distilled off, condensed and transferred out of the reaction vessel at reduced pressure. After the usual workup, the 2-hydroxynaphthalene-3-carboxylic acid is obtained in a yield of 65% based on sodium β-naphtholate used. In addition, 23% of unreacted β-naphthol and small amounts of 2-hydroxynaphthalene-6-carboxylic acid and 2-hydroxynaphthalene-3,6-dicarboxylic acid are obtained.

1. distillationdistilled off
2. customcondensed