Sebacic acid CAS# 111-20-6

Sebacic acid is widely used to make esters of sebacic acid. Its esters are widely used, such as dibutyl sebacate, dioctyl sebacate, and dioctyl sebacate. These esters can be used as plasticizers for plastics and cold-resistant rubber, and also used to make polyamides, polyurethane, alkyd resins, synthetic lubricants, lubricant additives, as well as fragrances, coatings, and cosmetics. They are also used as raw materials for the production of nylon 1010, nylon 910, nylon 810, nylon 610, nylon 9, and diethylhexyl ester for high-temperature resistant lubricants. It is also used as raw material for the production of alkyd resin (used as surface coating, plasticizing nitrocellulose coating, and urea resin varnish) and polyurethane rubber, cellulose resin, vinyl resin and plasticizer, softener, and solvent for synthetic rubber.

Manufacturing methods: sebacic acid was first obtained by dry distillation of castor oil with alkali, later developed synthetic methods, and is currently developing a new route for the fermentation of petroleum n-alkanes to sebacic acid. Another production method of sebacic acid is the electrolytic oxidation method of adipic acid developed by Asahi Kasei Industries, Japan, which is not produced on a large scale because of the higher cost compared with the castor oil alkali decomposition method.

(1) castor oil cracking method: castor oil is heated under the action of alkali hydrolysis to generate ricinoleic acid sodium soap, then add sulfuric acid to generate ricinoleic acid; in the presence of diluent cresol, add alkali heated to 260-280 ℃ for cracking, generating sebacic acid bis-sodium salt and secoctanol and hydrogen, cracked material diluted by water, heated and neutralized with acid, the bis-sodium salt into monosodium salt; then decolorized with activated carbon, boiling the neutralization solution Add acid to make sebacic acid monosodium salt into sebacic acid crystal precipitation, and then separated and dried to get the finished product. Raw material consumption quota: castor oil (industrial product) 2100kg/t, sulfuric acid (98) 1600kg/t, caustic soda (95) 1200kg/t, cresol (industrial product) 100kg/t.

(2) Petroleum n-decane fermentation method: Using 200# solvent oil or n-decane made by separation in 166-182℃ fraction, sebacic acid can be made by fermenting with 19-2 lipolytic pseudo-serum yeast.

(3) New cyclopentanone method: using palladium salt – copper or iron as a catalyst, in the solvent of ethanol, propanol or other alcohols, under the moderate conditions of low temperature and atmospheric pressure at 40-60℃, cyclopentene is oxidized with air to generate cyclopentanone, and then oxidized and dimerized with an iron catalyst to make sebacic acid.