Mitsubishi Petrochemical Company Limited

Huls Aktiengesellschaft

Yoshikazu Higaki

Hideyuki Takahashi

Kimikatsu Jinno

Karl Trukenbrod

Tomohiko Takahama

Hajime Ikeno

Masashi Inaba

Tadamichi Aoki

Mitsugi Kataoka

Masayuki Honda

Tadao Okada

Yuji Ozeki

Shohei Suzuki

Norio Sato

Koshi Matsubara

Kenichi Nakamura

A method of continuously distilling off the components of a mixture containing phenols, water and methanol using a single distillation column, wherein methanol is recovered from the top of the column, water containing phenols is dragged as a side stream from a recovery section of the column, and phenols are recovered as a bottom product. The method permits efficient separation by the single distillation column of the three components with high purity and low utility energy.

Method of separating components of phenols mixture by distillation

A copolymer is manufactured by allowing ethylene (A) and vinyl compounds (B) represented by the following general formula to undergo radical polymerization at a pressure of 1000-5000 kg/cm.sup.2 and a temperature of 100.degree.-400.degree. C., ##STR1## wherein R.sub.1 and R.sub.2 are each an independent hydrogen atom or a methyl group, R.sub.3 is a hydrogen atom or an alkyl group of 1-4 carbon atoms; a ratio of (B) to the sum of (A) and (B) is less than 1 mol %; a proportion of the amount of vinyl compounds (B), which are not successively bonded at all to the units (B) in the chain, but bonded to unlike units (A) on both sides thereof, to the total amount of (B) units in the copolymer is at least a 83%; and an MFR of the copolymer ranges from 0.1 to 200 g/10 min. Although the copolymer contains only a small amount of the vinyl compound (B) it nevertheless has excellent photo stabilizing effects.

Ethylene copolymer and method of producing same

A method of inhibiting polymerization of styrenes is disclosed, comprising the process of jointly using nitrosophenols and p-tertiarybutyl catecol for composing the polymerization inhibiting agent usable during the distillation process of styrenes.

Method of inhibiting polymerization of styrenes

Growing community of inventors

Yokkaichi, Japan

Yoshikazu Higaki