Synthesis of Polyester Polyol from Cyclohexanone plant wash water. (2023)

• Record Type: Journal Article
• Authors: Mishra, Ananta K.; Valodkar, Mayur C.; Patel, Akash M.; Sanchapara, Nirmit K.; Vaishnav, Pujan B.
• Is Part Of: Materials today. Volume 77(2023)Part 1
• Page Start: 136
• Page End: 141
• Publication Date: 2023
• Subjects: Cyclohexane Oxidation -- Cyclohexanone -- Wash water -- Polyester Polyol -- Synthesis; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.10.313
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Oxidation of Cyclohexane in presence of air produces Cyclohexanone and Cyclohexanol. However, it also produces carboxylic acid by-products due to uncontrolled reactions. The by-products are washed with water to increase purity of Cyclohexanone and Cyclohexanol. The wash water is a potential source of organic acids. This manuscript describes a process for the preparation of Polyester Polyol from the wash water obtained from Gujarat State Fertilizers and Chemicals ltd. The solid mass obtained after removal of liquid mass from the wash water was reacted with diethylene glycol (DEG) to synthesize Polyester Polyol. The reaction parameters were varied to obtain Polyester Polyol without containing unreacted DEG and solid mass. The optimum reaction condition was achieved by reacting 50 g of solid mass with 42.5 g DEG in presence of catalyst at 200 degC without vacuum followed by removal of unreacted DEG and low volatiles by distillation at 200 degC and 600 mmHg vacuum.