Mitsubishi Chemical Corporation

Hiroshi Iwasaka

Kazuyuki Okubo

Kazuhiro Makino

Koji Hata

Hironobu Ohno

Nobuyuki Murai

Masato Sato

Lionel O'Young

Nobuo Toratani

Kazuyuki Ookubo

A method of contact catalytic reaction by introducing a gas and a liquid into a lower part of a reaction zone comprising a liquid phase and a catalyst-packed bed held therein, where the catalyst-packed bed is a fixed bed.

Method of contact catalytic reaction

In yielding diacetoxybutene by feeding butadiene, acetic acid, and oxygen in the presence of a solid catalyst containing palladium, the butadiene can be efficiently reacted to produce diacetoxybutene in high yield by feeding an oxygen-containing gas containing 7 mol % or more oxygen as fine bubbles to a reaction zone containing the solid catalyst.

Process for producing diacetoxybutene

A method and system for producing 1,4-butanediol (1,4-BG), and optionally additionally tetrahydrofuran (THF), that promotes more efficient usage of water (H O) is provided. In one aspect, the method is comprised of supplying at least one feed stream including 1,4-diacetoxybutane (1,4-DAB), 1,4-hydroxyacetoxybutane (1,4-HAB) and H O to at least one reactor. 1,4-DAB, 1,4-HAB and H O are reacted in the reactor to produce at least one effluent stream that includes 1,4-BG, 1,4-HAB, H O, unreacted 1,4-DAB and acetic acid. The effluent stream is supplied to a separation system having one or more separators where at least a portion of the 1,4-HAB is removed from the effluent stream and recycled back to the reaction. Alternatively, 1,4-HAB may be supplied directly to the reactor as a feed stream, or a combination of feed stream and recycled 1,4-HAB may be used.

Method and system for producing 1,4-butanediol

A process for producing an unsaturated glycol diester disclosed, which process comprises reacting a conjugated diene with a carboxylic acid and molecular oxygen in the presence of a solid catalyst comprising (1) palladium and (2) tellurium as active components supported on a carrier, wherein a said carrier is a solid carrier in which a proportion of the volume of pores having a pore radius in the range of from 5 to 50 nm is 80% or more relative to the total volume of pores having a pore radius in the range of from 1.8 to 10,000 nm.

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Mie, Japan

Hiroshi Iwasaka