Promoter catalyst system with solvent purification

US8735634B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Umesh Krishna Hasyagar · Savanuru, IN
• Rathinam Jothi Mahalingam · Savanuru, IN
• Kishan Gurram · Bengaluru, IN
• Paul Eijsbouts · 's-Hertogenbosch, NL

Key dates

• Filing date: May 2, 2011
• Grant date: May 27, 2014
• Expiry date: Dec 17, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C37/84
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Methods for performing a condensation reaction are disclosed. Specifically, various methods for the production of highly-pure bisphenol-A are disclosed in which an attached promoter ion exchange resin catalyst system is combined with a solvent crystallization step.