Process for purifying 1,12-dodecanedioic acid

Details Process for purifying 1,12-dodecanedioic acid Process for purifying 1,12-dodecanedioic acid

1978-05-19

1979-04-10

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5142

Patent

active

041490134

ABSTRACT:
Process for purifying 1,12-dodecanedioic acid "DDA" by dissolving the impure DDA in hot aqueous acetic acid in the presence of phosphoric acid and a compound containing peroxidic oxygen (e.g., hydrogen peroxide, peracetic acid); filtering the solution to remove insoluble materials, e.g., iron phosphate; cooling the filtrate to recrystallize the DDA; washing the recrystallized DDA with aqueous acetic acid and then with water; and recovering the washed DDA crystals. This purified DDA is suitable for conversion into polyamide textile fiber.

REFERENCES:
patent: 2847467 (1958-08-01), Steadman et al.
patent: 3417138 (1968-12-01), Amir et al.
patent: 3714244 (1973-01-01), Okada et al.
patent: 3903152 (1975-09-01), Matsubara et al.

Affiliated with

Also associated with

Rating

Process for purifying 1,12-dodecanedioic 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 purifying 1,12-dodecanedioic acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying 1,12-dodecanedioic acid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1072742