Process for the purification and preparation of acrylic acid...

Details Process for the purification and preparation of acrylic acid... Process for the purification and preparation of acrylic acid...

2005-07-26

2005-07-26

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S598000

Reexamination Certificate

active

06921837

ABSTRACT:
Acrylic acid or methacrylic acid is purified by crystallization to obtain crystals and a mother liquor, by a process in which the crystals are washed with a wash liquid containing the acid and having a temperature from 15 to 40° C. Furthermore, a process for the preparation of acrylic acid or methacrylic acid comprises the abovementioned purification process.

REFERENCES:
patent: 5510558 (1996-04-01), Umansky et al.
patent: 6433222 (2002-08-01), Eck et al.
patent: 6596901 (2003-07-01), Eck et al.
patent: 6700016 (2004-03-01), Eck et al.
patent: 2259945 (1998-01-01), None
patent: 1105352 (1995-07-01), None
patent: 1 205 502 (1966-06-01), None
patent: 1 962 431 (1970-06-01), None
patent: 2 251 364 (1973-05-01), None
patent: 29 43 707 (1980-05-01), None
patent: 195 08 558 (1996-09-01), None
patent: 196 27 847 (1998-01-01), None
patent: 197 40 252 (1999-03-01), None
patent: 198 33 049 (2000-01-01), None
patent: 0 058 927 (1982-09-01), None
patent: 0 092 097 (1983-10-01), None
patent: 0 117 146 (1984-08-01), None
patent: 0 257 565 (1988-03-01), None
patent: 0 293 224 (1988-11-01), None
patent: 0 253 409 (1991-11-01), None
patent: 0 974 574 (2000-01-01), None
patent: 1 450 986 (1976-09-01), None
patent: WO 98/01415 (1998-01-01), None
The Merck Index, 13thed. pp. 24, 25 and 1062, Merck & Co., Inc. Whitehouse Station, NJ (2001).

Affiliated with

Also associated with

Rating

Process for the purification and preparation of acrylic acid... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the purification and preparation of acrylic acid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the purification and preparation of acrylic acid... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3404764