FR2111014A5 - Isolation of dl-isoleucine - by multistage fractional crystallisation with countercurrent passage of mother liquors - Google Patents

Isolation of dl-isoleucine - by multistage fractional crystallisation with countercurrent passage of mother liquors

Info

Publication number
FR2111014A5
FR2111014A5 FR7135854A FR7135854A FR2111014A5 FR 2111014 A5 FR2111014 A5 FR 2111014A5 FR 7135854 A FR7135854 A FR 7135854A FR 7135854 A FR7135854 A FR 7135854A FR 2111014 A5 FR2111014 A5 FR 2111014A5
Authority
FR
France
Prior art keywords
isoleucine
isolation
fractional crystallisation
mother liquors
multistage fractional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7135854A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19702048790 external-priority patent/DE2048790C3/en
Application filed by Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Application granted granted Critical
Publication of FR2111014A5 publication Critical patent/FR2111014A5/en
Expired legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

(I) is isolated from mixtures of isomeric isoleucine by (a) subjecting the mixture to multistage fractional crystallisation from aqs. soln., the mother liquor being passed in countercurrent; or (b) epimerising the isomer mixture by heating in alkali metal hydroxide soln., separating by adjusting the pH to ca. 5.5, and treating the mixture obtained as in (a).
FR7135854A 1970-10-05 1971-10-05 Isolation of dl-isoleucine - by multistage fractional crystallisation with countercurrent passage of mother liquors Expired FR2111014A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702048790 DE2048790C3 (en) 1970-10-05 Process for the production of D, L-isoleucine

Publications (1)

Publication Number Publication Date
FR2111014A5 true FR2111014A5 (en) 1972-06-02

Family

ID=5784203

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7135854A Expired FR2111014A5 (en) 1970-10-05 1971-10-05 Isolation of dl-isoleucine - by multistage fractional crystallisation with countercurrent passage of mother liquors

Country Status (4)

Country Link
JP (1) JPS549172B1 (en)
FR (1) FR2111014A5 (en)
IT (1) IT942203B (en)
NL (1) NL7111760A (en)

Also Published As

Publication number Publication date
NL7111760A (en) 1972-04-07
IT942203B (en) 1973-03-20
DE2048790A1 (en) 1972-04-06
JPS549172B1 (en) 1979-04-21
DE2048790B2 (en) 1976-04-29

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Legal Events

Date Code Title Description
ST Notification of lapse