C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/631.7
C07C 29/03 (2006.01) C07C 29/36 (2006.01)
Patent
CA 2033419
An improved process for producing octa-2,7-dien-1-of by reacting butadiene with water is provided. The butadiene/ water reaction is carried out in an aqueous sulfolane solution containing a carbonate and/or bicarbonate of a monodentate tertiary amine having a basicity constant (pKa) of at least 7 in the presence of a palladium compound and a phosphonium salt, while maintaining the mole ratio of butadiene to octa-2,7-dien-1-01 at at least 0.6, to synthesize octa-2,7-dien-1-01. The octa-2,7-dien-1-of is extracted and part of the extraction residue containing catalyst is returned to the synthesis step. The extract containing octa-2,7-dien-1-01 is washed with an aqueous sulfolane solution in the presence of a water-soluble phosphine and separating the mixture into the aqueous sulfolane solution layer and the washed extract layer and part of the aqueous sulfolane solution layer obtained during washing is returned to the extraction step. The washed extract layer is washed to obtain the final product.
Higashi Tamio
Hino Kenichi
Murasawa Masami
Tokitoh Yasuo
Yoshimura Noriaki
Kirby Eades Gale Baker
Kuraray Co. Ltd.
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