Isolation of trimethyl trimellitate from waste products of dimethyl terephthalate manufacture

Journal Article · Sat Sep 10 00:00:00 EDT 1983 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:6814497

Kovalenko, N A; Petkevich, T S; Mitskevich, N I; Zernov, P N

During manufacture of dimethyl terephthalate, which is used as a monomer in production of polyester fibers, by joint oxidation of p-xylene and methyl p-toluate waste products are obtained at various stages of its purification; these have usually been burnt. One type of waste product (residue III), separated from the mother liquor during recrystallization of dimethyl terephthalate from methanol, contains in addition to dimethyl phthalates and resinous products a considerable amount of trimethyl trimellitate (TMT), the content of which in the wastes varies in the range 12-40% and depends mainly on the performance of the distillation and recrystallization stages. It was of interest to isolate pure TMT from the wastes so that, on the one hand, it could be used for improving fiber quality, and on the other hand the amount of wastes would be reduced. Our method for isolating TMT from the wastes includes vacuum fractionation with subsequent removal of impurities from TMT by treatment with reagents of basic character.

• OSTI ID: 6814497
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Vol. 56:3
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CHEMICAL INDUSTRY
WASTE PRODUCT UTILIZATION
INDUSTRIAL WASTES
WASTE PROCESSING
PHTHALATES
PRODUCTION
CHEMICAL REACTIONS
PH VALUE
CARBOXYLIC ACID SALTS
INDUSTRY
MANAGEMENT
PROCESSING
WASTE MANAGEMENT
WASTES
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management