Preparation of Acrylic.
Answers
Answer:
Production. Acrylic acid is produced by oxidation of propylene, which is a byproduct of the production of ethylene and gasoline: 2 CH2=CHCH3 + 3 O2 → 2 CH2=CHCO2H + 2 H2O.
Answer:
Perparation of Acrylic
Explanation:
A mixture of 1000 g of acrylonitrile, 6 g of hydroquinone, 14 g of copper powder, 648 g of ice, and 1012 ml of concentrated sulfuric acid is heated gradually under a reflux condenser on a steam bath. The exothermic reaction is controlled by cautious application of heat, particularly during the first hour. Heating is continued for 48 hours, after which the mixture is cooled and the precipitated ammonium bisulfate is filtered off. The crude acid is distilled by dropping it into a distilling flask loosely packed with fine copper wire and heated to a bath temperature of 250°. The system is maintained under a pressure of about 10 mm., and the distillation receiver is packed in ice. Approximately 1000 g of clear, colorless distillate is obtained which is shown by analysis to be 86% acrylic acid free of sulfur and nitrogen.
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