Method for the purification of a crude acrylic acid melt

Details Method for the purification of a crude acrylic acid melt Method for the purification of a crude acrylic acid melt

2006-09-26

2006-09-26

Richter, Johann (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S598000

Reexamination Certificate

active

07112695

ABSTRACT:
In a process for the purification of a crude acrylic acid melt, the crude acrylic acid melt is converted, under the action of low temperatures, into a crude acrylic acid suspension consisting of acrylic acid crystals and residual melt, and the acrylic acid crystals of the crude acrylic acid suspension are freed from remaining residual melt in a wash column, the production of the acrylic acid crystals of the crude acrylic acid suspension being carried out in the presence of water, the wash column being a wash column with forced transport of the acrylic acid crystals and the wash liquid used being the melt of acrylic acid crystals purified in the wash column.

REFERENCES:
patent: 2136396 (1973-02-01), None
patent: 26 06 364 (1977-01-01), None
patent: 37 08 709 (1988-10-01), None
patent: 196 26 839 (1998-01-01), None
patent: 197 40 252 (1999-03-01), None
patent: 198 29 477 (2000-01-01), None
patent: 198 32 962 (2000-01-01), None
patent: 198 33 049 (2000-01-01), None
patent: 198 38 845 (2000-03-01), None
patent: 199 24 533 (2000-11-01), None
patent: 199 26 082 (2000-12-01), None
patent: 0 253 409 (1988-01-01), None
patent: 0 297 445 (1988-06-01), None
patent: 0 616 998 (1994-03-01), None
patent: 0 648 520 (1995-04-01), None
patent: 0 722 926 (1996-01-01), None
patent: 0 730 893 (1996-09-01), None
patent: 0 776 875 (1997-06-01), None
patent: 07082210 (1995-03-01), None
patent: 11035519 (1999-02-01), None
patent: 98 25889 (1998-06-01), None
patent: 99/06348 (1999-02-01), None
Siegbert Rittner et al.: “Die schmelzkristallisation von organischen stoffen und ihre grosstechnische anwendung” Chem.-Ing. Techn., vol. 57, No. 2, pp. 91-102 1985.
P.J. Jansens et al.: “The purification process in hydraulic packed-bed wash columns” Chemical Engineering Science, vol. 50, No. 17, pp. 2717-2729 1995.
D. Verdoes et al.: “Improved procedures for separating crystals from the melt” Applied Thermal Engineering, vol. 17, Nos. 8-10, pp. 879-888 1997.
M. Nienoord et al., “Experiences with the TNO-hydraulic wash column” 4. BIWIC 94/Bremen International Workshop for Industrial Crystalization, Bremen Sep. 8th-9th, 1994, University Bremen.

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3610453