METHOD FOR PRODUCING CYCLIC ALPHA, BETA-UNSATURATED ETHER

Japanese Patent JP3795974

B2

PROBLEM TO BE SOLVED: To produce a cyclic α,β-unsaturated ether useful as an intermediate for various kinds of medicines and agrochemicals at high productivity and high conversion and selectivity by performing dehydrogenation and dehydration of an alkane diol in the presence of a cobalt catalyst.
SOLUTION: This cyclic α,β-unsaturated ether is produced by reacting an alkanediol of the formula, HO(CH2)2X(CH2)2OH (X is a single bond, methylene, ethylene, ethylidene or 0) at 210-250°C in the presence of a cobalt-containing catalyst, an organic sulfonic acid and a high boiling amine to dehydrogenate and dehydrate the alkanediol. A catalyst in which cobalt, cobalt oxide and zirconium is supported on diatomaceous earth is preferable as the catalyst, and the catalyst is used in an amount of 0.01-0.3wt.% based on the alkanediol in terms of pure cobalt. The use of the organic sulfonic acid is 0.001-0.1wt.% based on the alkanediol, and the high boiling amine is used in an amount of 1-10mol based on 1mol of the organic sulfonic acid. The amount of distillation of the cyclic α,β-unsaturated ether per unit catalyst is about 50g/g-catalyst for 1hr, and it is clear that the catalyst has high activity.

JP4911515	Hydrogen storage body composed of hydrate of organic compound and hydrogen supply method using it
JP6306235	Intermediate for preparation of halichondrin B analog
WO/2003/051842	COMPOSITIONS DECREASING ACTIVITY OF HORMONE-SENSITIVE LIPASE

Kouhei Konpei
Hayashibara Otsuhiko
Mitani Toshimichi

JP23388596A

July 12, 2006

September 04, 1996

Click for automatic bibliography generation  

KURARAY CO.,LTD.

C07D307/28; B01J23/75; B01J25/00; C07B61/00; C07D309/18; (IPC1-7): C07D307/28; B01J23/75; B01J25/00; //C07B61/00

JP1287079A
JP35016566B1

Angew. Chem.,1960年,Vol.72,p.865

Previous Patent: WATER-BASED PIGMENT INK COMPOSITION

Next Patent: APPARATUS FOR PREVENTING OIL FROM MIXING AT GAS STATION AND OIL RESERVING SITE