February 4, 2013

CAS databases provide millions of journal article references from more than 10,000 major scientific journals worldwide, patent and patent family references from 63 patent authorities around the world, and other reputable web sources.

The following patent record is from the CAplusSM database.

CAPLUS COPYRIGHT 2013 ACS

Patent Number: US 8318955
Title: Procedure for the production of diarylcarbonates from dialkyl carbonates
Inventor(s): Guertler, Christoph; Mueller, Thomas Ernst; Ooms, Pieter; Risse, Friedhelm; Rechner, Johann; Doro, Franco; Prokofieva, Angelina
Patent Assignee(s): Bayer Materialscience Aktiengesellschaft, Germany
Source: Ger. Offen., 31pp. CODEN: GWXXBX
Language: German

Abstract:
A continuous production of diarylcarbonates from dialkyl carbonates and hydroxyarom. compds. comprises (a) manufacturing alkylene carbonates by reacting alkylene oxides with CO2, (b) reacting these alkylene carbonates with aliphatic alcs. to obtain dialkyl carbonates and alkylene glycol, (c) separating dialkyl carbonates, (d) separating alkylene glycols, (e) oxidative carbonylation separated alkylene glycols with CO to obtain alkylene carbonate, (f) reacting dialkyl carbonates with monophenol to obtain alkylarylcarbonate or diarylcarbonate and aliphatic alc., (g) disproportionation alkylarylcarbonates to diarylcarbonates and dialkylcarbonates and (h) optionally reacting diarylcarbonates with bisphenols to obtain polycarbonates.

Please note:  Abstracts and Titles for patent records in CAplus are routinely enhanced to better describe the claimed invention. The title of the U.S. granted patent is Process for preparing diaryl carbonates from dialkyl carbonates.

 View the full-text here.

Recent News

    August 21, 2016 | CAS announces SciFindern, a new
    research experience that elevates scientific discovery

    August 19, 2016 | CAS seeks to help undergraduate
    students think like researchers with Chemistry
    Class Advantage, an organic chemistry learning
    solution powered by SciFinder

    August 1, 2016 | CAS Strengthens its Commitment to
    Science and Innovation Selecting 26 Outstanding
    International Scientists to Participate in the 2016
    SciFinder Future Leaders Program

                                                                       More News >> 

 Media Contact

 Name: Rhonda Ross
 Phone: 614-447-3624                                       
 Email: cas-pr@cas.org