GB808425A - Improvements in or relating to the separation of aromatic amines - Google Patents

Improvements in or relating to the separation of aromatic amines

Info

Publication number
GB808425A
GB808425A GB24027/55A GB2402755A GB808425A GB 808425 A GB808425 A GB 808425A GB 24027/55 A GB24027/55 A GB 24027/55A GB 2402755 A GB2402755 A GB 2402755A GB 808425 A GB808425 A GB 808425A
Authority
GB
United Kingdom
Prior art keywords
salts
amines
mixture
agent
amine
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
GB24027/55A
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.)
TAKASHIGE TOJO
Original Assignee
TAKASHIGE TOJO
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
Application filed by TAKASHIGE TOJO filed Critical TAKASHIGE TOJO
Publication of GB808425A publication Critical patent/GB808425A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/82—Purification; Separation; Stabilisation; Use of additives
    • C07C209/86—Separation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/62—Preparation of compounds containing amino groups bound to a carbon skeleton by cleaving carbon-to-nitrogen, sulfur-to-nitrogen, or phosphorus-to-nitrogen bonds, e.g. hydrolysis of amides, N-dealkylation of amines or quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/82—Purification; Separation; Stabilisation; Use of additives
    • C07C209/84—Purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00—Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
    • C07C211/49—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton
    • C07C211/50—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring having at least two amino groups bound to the carbon skeleton with at least two amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton

Abstract

A mixture of aromatic amines is treated with an aqueous agent capable of converting the amines into salts, or a mixture of salts of different aromatic amines is treated with an aqueous agent capable of converting the amine salts into free bases; in either case the agent is added in such amount that the product consists of a mixture of free bases in an organic phase and a mixture of salts in an aqueous phase, and these phases are separated and treated to recover a desired amine or amines which predominates in one of the layers. The starting material may itself be a mixture of amines and salts, and a similar mixture may be used as the agent, in which case double decomposition occurs. Alternatively the agent is (1) an acid such as sulphuric, hydrochloric or acetic, or an acid-reacting substance such as sulphur dioxide or an acidic salt (e.g. an amine salt); or (2) an alkali hydroxide or carbonate or an amino compound. The separated amine can be purified by standard methods, e.g. fractional solidification or distillation, steam distillation, molecular distillation, selective conversion into salts and recrystallization of the free bases or salts. The process can be applied to mixtures of isomeric amines or of non-isomeric amines or of both. The amines can be N-substituted provided they are still capable of forming salts. Examples show the separation of mixtures of (1) o- and p-anisidines, (2) o-, m- and p-toluidines, (3) o- and p-chloroanilines, (4) o-chloroaniline and p-anisidine, (5) aniline and dimethylaniline, and (6) a - and b -naphthylamines. Other mixtures that can be separated are those of o- and p-phenylenediamines.
GB24027/55A 1954-08-21 1955-08-19 Improvements in or relating to the separation of aromatic amines Expired GB808425A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP808425X 1954-08-21

Publications (1)

Publication Number Publication Date
GB808425A true GB808425A (en) 1959-02-04

Family

ID=13729598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24027/55A Expired GB808425A (en) 1954-08-21 1955-08-19 Improvements in or relating to the separation of aromatic amines

Country Status (1)

Country Link
GB (1) GB808425A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717680A (en) * 1969-10-16 1973-02-20 Mallinckrodt Chemical Works PURIFICATION OF p-AMINOPHENOL
DE2719996A1 (en) * 1976-06-04 1977-12-15 Upjohn Co PROCESS FOR SEPARATING 4,4'-DIAMINODIPHENYLMETHANE IN PRACTICAL PURE FORM FROM MIXTURES OF THIS WITH THE CORRESPONDING 2,4'-ISOMERS
US4532352A (en) * 1983-10-24 1985-07-30 Mallinckrodt, Inc. Separation of aniline and p-fluoroaniline
US5041654A (en) * 1989-11-17 1991-08-20 Minnesota Mining And Manufacturing Company Preparation of monosubstituted dithiooxamide compounds
US5124308A (en) * 1989-11-17 1992-06-23 Albin Loren D Monosubstituted dithiooxamide compounds and their use

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717680A (en) * 1969-10-16 1973-02-20 Mallinckrodt Chemical Works PURIFICATION OF p-AMINOPHENOL
DE2719996A1 (en) * 1976-06-04 1977-12-15 Upjohn Co PROCESS FOR SEPARATING 4,4'-DIAMINODIPHENYLMETHANE IN PRACTICAL PURE FORM FROM MIXTURES OF THIS WITH THE CORRESPONDING 2,4'-ISOMERS
US4532352A (en) * 1983-10-24 1985-07-30 Mallinckrodt, Inc. Separation of aniline and p-fluoroaniline
US5041654A (en) * 1989-11-17 1991-08-20 Minnesota Mining And Manufacturing Company Preparation of monosubstituted dithiooxamide compounds
US5124308A (en) * 1989-11-17 1992-06-23 Albin Loren D Monosubstituted dithiooxamide compounds and their use

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