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Patent Searching and Data


Title:
PROCESS FOR PRODUCING D,L-MENTHOL FROM D-MENTHOL
Document Type and Number:
Japanese Patent JPH08310983
Kind Code:
A
Abstract:

To obtain the subject compound useful as perfume, etc., using a reprocessable catalyst having long catalytic life by using a specific fixed bed catalyst tree from supporting material, thereby increasing the treating amount per unit amount of the catalyst.

The catalytic rearrangement of an optically active α-menthol is carried out by a fixed bed process using an available molded article acting as a catalyst free from supporting material and produced by reducing a press- formed powder of (A) an oxide or hydroxide of nickel, manganese and an alkaline earth metal (e.g. strontium) and optionally (B) an oxide or hydroxide of a group V transition element (e.g. vanadium) and/or a group VI element (e.g. chromium) of the periodic table. The reaction is carried out in the presence of hydrogen under a hydrogen pressure of 50-350 bar at 200-350°C. The formed catalyst contains e.g. 30-60 wt.% of nickel, 10-20 wt.% of manganese, 0.2-5 wt.% of an alkaline earth metal, $5 wt.% of the component B and the remaining part of oxygen based on 100 wt.% of the total mixture.


Inventors:
GERUHARUTO DARUSOU
GERUTOOMIHIYAERU PETORUKU
Application Number:
JP13771696A
Publication Date:
November 26, 1996
Filing Date:
May 09, 1996
Export Citation:
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Assignee:
BAYER AG
International Classes:
B01J23/76; B01J23/78; B01J23/85; B01J23/88; B01J23/889; C07C29/56; C07C35/12; (IPC1-7): C07C35/12; B01J23/889; B01J23/85; B01J23/88; C07C29/56
Attorney, Agent or Firm:
Heiyoshi Odashima