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Patent Searching and Data


Title:
PRODUCTION OF ALPHA-METHYL-GAMMA-BUTYLOLACTONE
Document Type and Number:
Japanese Patent JPH0692951
Kind Code:
A
Abstract:

PURPOSE: To obtain a compound useful as a raw material for solvents and polyurethanes by subjecting methyl methacrylate to hydroformylate, to reduce with hydrogen at a low pressure and then to eliminate methanol.

CONSTITUTION: Methyl methacrylate is subjected to react with a mixed gas of hydrogen and carbon monoxide at 100-150°C and 20-90kg/cm2 pressure in the presence of a rhodium compound and a tris (substituted aryl) phosphite of the formula (R1, R2 and R3 are substituted aryl) to obtain methyl 3- formyl-2-methyl propionate. It is important that the tris (substituted aryl) phosphite used here shall have 2080-2090cm ↑-1 electronic parameter and 135-190°C steric parameter. Then, obtained methyl 3-formyl-2-methyl propionate is reduced with hydrogen in the presence of a hydrogenation catalyst and followed by elimination of methanol at 80-180°C in the presence of an acid or an alkali catalyst to obtain the compound.


Inventors:
TSUDA TOMOYASU
YOSHIMURA NORIAKI
HINO KENICHI
MATSUNAGA SUSUMU
Application Number:
JP1992000244861
Publication Date:
April 05, 1994
Filing Date:
September 14, 1992
Export Citation:
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Assignee:
KURARAY CO
International Classes:
B01J25/02; B01J31/18; C07B61/00; C07D307/32; C07D307/33; (IPC1-7): C07D307/33; B01J25/02; B01J31/18