Method for the continuous production of unsaturated...

Details Method for the continuous production of unsaturated... Method for the continuous production of unsaturated...

2007-03-14

2011-12-27

Puttlitz, Karl J (Department: 1621)

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

Organic compounds

Carboxylic acid anhydrides

Reexamination Certificate

active

08084640

ABSTRACT:
Process for continuously preparing unsaturated carboxylic anhydrides of the general formula Iin-line-formulae description="In-line Formulae" end="lead"?R—C(O)—O—C(O)—R  (I)in-line-formulae description="In-line Formulae" end="tail"?in which R is an unsaturated organic radical having 2 to 12 carbon atomsby transanhydridization of an aliphatic carboxylic anhydride with a carboxylic acid of the general formula IIin-line-formulae description="In-line Formulae" end="lead"?R—COOH  (II)in-line-formulae description="In-line Formulae" end="tail"?in which R is as defined abovein a rectification column having an upper, middle and lower region, characterized in thatf) an inert boiling oil is initially charged in the bottom of the column,g) the reactants are fed into a reaction region in stoichiometric ratios,h) the carboxylic acid formed as the by-product is withdrawn at the top of the column,i) the unconverted reactants are recycled into the reaction region andj) the product of the formula I is obtained via a side draw, preferably between the middle and lower column region.

REFERENCES:
patent: 4110372 (1978-08-01), Hey et al.
patent: 4857239 (1989-08-01), Hurtel et al.
patent: 6743407 (2004-06-01), Schaefer et al.
patent: 6977310 (2005-12-01), Ackermann et al.
patent: 6979432 (2005-12-01), Schaefer et al.
patent: 7288402 (2007-10-01), Osswald et al.
patent: 7491521 (2009-02-01), Osswald et al.
patent: 2003/0018217 (2003-01-01), Dupont et al.
patent: 2006/0211880 (2006-09-01), Ackermann et al.
patent: 2008/0194862 (2008-08-01), Ackermann et al.
patent: 2008/0194875 (2008-08-01), Ackermann et al.
patent: 2008/0248538 (2008-10-01), Osswald et al.
patent: 2008/0269431 (2008-10-01), Sarcinelli et al.
patent: 2009/0118533 (2009-05-01), Broell et al.
patent: 3510035 (1986-10-01), None
patent: 0 004 641 (1979-10-01), None
patent: 0 196 520 (1986-10-01), None
patent: 2 877 003 (2006-04-01), None
U.S. Appl. No. 12/298,034, filed Oct. 22, 2008, May et al.
U.S. Appl. No. 12/300,189, filed Nov. 10, 2008, Broell et al.
U.S. Appl. No. 12/307,773, filed Jan. 7, 2009, Ackermann et al.
U.S. Appl. No. 12/441,145, filed Mar. 13, 2009, May et al.
U.S. Appl. No. 12/515,036, filed May 15, 2009, May et al.
U.S. Appl. No. 12/443,784, filed Mar. 31, 2009, Vogel et al.
U.S. Appl. No. 12/442,415, filed Mar. 23, 2009, Vogel et al.
U.S. Appl. No. 12/303,161, filed Dec. 2, 2008, Marx et al.
U.S. Appl. No. 12/517,563, filed Jun. 4, 2009, Broell.

Affiliated with

Also associated with

Rating

Method for the continuous production of unsaturated... 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 continuous production of unsaturated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the continuous production of unsaturated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4264198