Process for the preparation of alkanediol

Details Process for the preparation of alkanediol Process for the preparation of alkanediol

2007-02-22

2008-03-11

Price, Elvis O. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S866000

Reexamination Certificate

active

07342141

ABSTRACT:
The invention provides a process for the preparation of alkanediol comprising the steps:(i) contacting alkylene oxide with carbon dioxide in the presence of a carbonation catalyst to obtain a reaction mixture containing alkylene carbonate at a reaction temperature of from 100 to 200° C.;(ii) contacting the reaction mixture obtained in step (i) with R—OH, in which R is hydrogen or an alkyl group in the presence of a catalyst to obtain a second reaction mixture containing alkanediol and R2CO3;(iii) subjecting the second reaction mixture containing alkanediol and R2CO3to a separation step to yield a crude alkanediol stream, which is subjected to distillation to yield a purified stream of alkanediol as the bottom stream;(iv) subjecting the purified stream of alkanediol obtained in step (iii) to further distillation to obtain a second bottom stream containing a mixture of alkanediol, heavy components, and optionally carbonation catalyst, and a top stream containing high purity alkanediol;wherein at least part of the reaction mixture obtained in step (i) is used for heat exchange with at least part of the crude alkanediol stream and/or with at least part of the purified alkanediol stream.

REFERENCES:
patent: 2994705 (1961-08-01), Crosby et al.
patent: 3803201 (1974-04-01), Glipin et al.
patent: 4314945 (1982-02-01), McMullen et al.
patent: 4434105 (1984-02-01), Buysch et al.
patent: 4508927 (1985-04-01), Bhise et al.
patent: 4691041 (1987-09-01), Duranleeau et al.
patent: 5153333 (1992-10-01), Schubert et al.
patent: 5231212 (1993-07-01), Buysch et al.
patent: 5359118 (1994-10-01), Wagner et al.
patent: 5426207 (1995-06-01), Harrison et al.
patent: 5449791 (1995-09-01), Wagner et al.
patent: 5455368 (1995-10-01), Janisch et al.
patent: 5508442 (1996-04-01), Wagner et al.
patent: 5847189 (1998-12-01), Tojo et al.
patent: 6156160 (2000-12-01), Marquis et al.
patent: 6187972 (2001-02-01), Kawabe et al.
patent: 6294684 (2001-09-01), de Bruin et al.
patent: 6380419 (2002-04-01), Kawabe
patent: 6392078 (2002-05-01), Ryu et al.
patent: 6407279 (2002-06-01), Buchanana et al.
patent: 6479689 (2002-11-01), Tojo et al.
patent: 6573396 (2003-06-01), Buchanan et al.
patent: 6774256 (2004-08-01), Schlosberg et al.
patent: 1060091 (1992-04-01), None
patent: 1102826 (1995-05-01), None
patent: 1528735 (2004-09-01), None
patent: 0297647 (1788-06-01), None
patent: 0001082 (1979-03-01), None
patent: 0274953 (1988-07-01), None
patent: 0180387 (1990-05-01), None
patent: 0583789 (1994-02-01), None
patent: 0776890 (2001-01-01), None
patent: 1174406 (2002-01-01), None
patent: 0119840 (2004-09-01), None
patent: 55-64550 (1980-05-01), None
patent: 61-291545 (1986-12-01), None
patent: 2-212456 (1990-08-01), None
patent: 2003-81893 (1993-03-01), None
patent: 9-183744 (1997-07-01), None
patent: 2000-005503 (2000-01-01), None
patent: 2000-113144 (2003-04-01), None
patent: 2003-155264 (2003-05-01), None
patent: 2003-342236 (2003-12-01), None
patent: WO9957108 (1999-11-01), None
patent: WO03006418 (2003-01-01), None
patent: WO03082797 (2003-10-01), None
patent: WO2004056793 (2004-07-01), None
patent: WO2005003113 (2005-01-01), None
patent: WO2005051939 (2005-06-01), None

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