Methanol → Benzoic Acid

Participants

Reaction Steps

In a reaction vessel having a capacity of 20 l, 1100 g of the so-obtained block copolymer-containing composition was dissolved in 11 l of p-xylene in a nitrogen atmosphere at 100° C. After the composition had been completely dissolved in p-xylene, 400 ml of pyridine was added into the reaction vessel, and 800 g of benzoyl chloride was continuously supplied in the reaction system over a period of 1 hour. Then, reaction was conducted at 100° C. for 1.5 hours after completion of the addition of benzoyl chloride, and the reaction was stopped by adding 2 l of distilled water into the reaction mixture. After termination of the reaction, the temperature was lowered close to room temperature and the liquid reaction mixture was thrown into a great excess of methanol (in a mixer) to precipitate a benzoic acid-esterified polymer composition. The precipitate was recovered by filtration. After filtration, the benzoic acid-esterified polymer composition was washed with methanol repeatedly and dried under reduced pressure at 50° C. for 24 hours to obtain an intended benzoic acid-esterified polymer composition.

Provenance & Evidence