Process for the production of methionine

Details Process for the production of methionine Process for the production of methionine

2001-02-13

2003-04-08

Shah, Mukund J. (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

06545179

ABSTRACT:

The present invention relates to a process for the production of methionine through the hydrolysis of methionine amide using a catalyst comprising titanium and to use of the process for the industrial production of methionine comprising low amounts of and in some cases, substantially no salt by-products
The hydrolysis of the methionine amide to produce the methionine is a known process. In particular, European Patent Application No228938 discloses a process for the production of methionine by the hydrolysis of the methionine amide using a strong base. A problem with this process is that the acidification step uses a strong acid which results in the co-production of mineral salts such as carbonates, chlorides or sulphates. An additional purification step is generally required to remove the salt.
French Patent Application No. 9814000 attempts to overcome the aforementioned problem through the use of a titanium catalyst in the hydrolysis reaction. The use of a titanium based catalyst is also disclosed in Japanese patent applications 03093753, 03093754, 03093755, 03093756.
We have now found that methionine can be produced in high yields using a specific titanium catalyst. Accordingly, the present invention provides a process for the production of methionine which comprises (a) hydrolysing methionine amide in the presence of a catalyst comprising titanium to produce ammonium methioninate, said catalyst having a porosity of from 5 to 1000 nm, a total pore volume of from 0.2 to 0.55 cm
3
/g and a surface area of from 30 to 150 m
2
/g, and (b) a second step of recuperating methionine from the ammonium methioninate salt by removing ammonia.


REFERENCES:
patent: 5672745 (1997-09-01), Hassberg et al.
patent: WO 94/08957 (1994-04-01), None
patent: 2 772 026 (1999-06-01), None
patent: 3-93753 (1989-09-01), None
English abstract (as abstracted by CAPLUS) of JP 03093753. Mizuno et al (Apr. 1991).*
English language abstract of JP 03093754 (Apr. 18, 1991).
English language abstract of JP 03093753 (Apr. 18, 1991).
English language abstract of FR 2 772 026 from Orbit (Jun 11, 1999).

Affiliated with

Also associated with

Rating

Process for the production of methionine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of methionine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of methionine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3097837