×

Integrated process for preparing dialkyl carbonates with a circulating catalyst

  • US 20030045739A1
  • Filed: 06/22/2001
  • Published: 03/06/2003
  • Est. Priority Date: 06/22/2001
  • Status: Active Grant
First Claim
Patent Images

1. An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol comprising:

  • (a) reacting an alkylene oxide with carbon dioxide in the presence of a homogeneous carbonation catalyst at a temperature in the range of about 50 to 250°

    C. and at a pressure of at least about 1379 kPa (200 psi) to provide a crude cyclic carbonate stream comprising a cyclic carbonate and homogeneous carbonation catalyst; and

    (b) reacting said cyclic carbonate with an aliphatic monohydric alcohol in the presence of said homogeneous carbonation catalyst to provide a crude product stream comprising a dialkyl carbonate and diol.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×