GB701179A - An improved method of manufacturing 3-picoline - Google Patents

An improved method of manufacturing 3-picoline

Info

Publication number
GB701179A
GB701179A GB20836/51A GB2083651A GB701179A GB 701179 A GB701179 A GB 701179A GB 20836/51 A GB20836/51 A GB 20836/51A GB 2083651 A GB2083651 A GB 2083651A GB 701179 A GB701179 A GB 701179A
Authority
GB
United Kingdom
Prior art keywords
picoline
chloride
cuprous chloride
cupric
decomposed
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
GB20836/51A
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.)
URXOVY ZD Y
Original Assignee
URXOVY ZD Y
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 URXOVY ZD Y filed Critical URXOVY ZD Y
Publication of GB701179A publication Critical patent/GB701179A/en
Expired legal-status Critical Current

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  • Pyridine Compounds (AREA)

Abstract

3-Picoline is separated from a mixture of pyridine bases contained in basic tar fractions boiling at 140-145 DEG C., by treating with cupric or cuprous chloride or with cupric chloride and a reducing agent such as sulphur dioxide or alkali metal sulphates whereupon the 3-picoline forms a crystalline precipitate of a copper complex from which the free base is obtained by steam distilling in the presence of an alkali such as sodium hydroxide. The cupric chloride may suitably be added as an aqueous solution. In a modification suitable for the purification of high percentage 3-picoline the crude base is added dropwise to solid cuprous chloride, the reaction mixture is heated until the cuprous chloride is dissolved and the crystalline precipitate produced by cooling is separated and decomposed. In examples (1) a mixture of pyridine bases is treated with aqueous cupric chloride and boiled and the copper complex which separates on cooling is decomposed by steam-distilling with aqueous alkali to give 3-picoline; (2) pyridine bases are separated as in (1) using cupric chloride and sulphur dioxide and (3) 95 per cent. pure 3-picoline is added to solid cuprous chloride and heated to dissolve the cuprous chloride and the precipitate which separates on cooling is decomposed to give 3-picoline.
GB20836/51A 1950-09-30 1951-09-04 An improved method of manufacturing 3-picoline Expired GB701179A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS701179X 1950-09-30

Publications (1)

Publication Number Publication Date
GB701179A true GB701179A (en) 1953-12-16

Family

ID=5454928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20836/51A Expired GB701179A (en) 1950-09-30 1951-09-04 An improved method of manufacturing 3-picoline

Country Status (1)

Country Link
GB (1) GB701179A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767187A (en) * 1954-12-29 1956-10-16 Pittsburgh Coke & Chemical Co Isolation of gamma picoline
US2913323A (en) * 1956-10-24 1959-11-17 Monsanto Chemicals Herbicidal method and composition employing bis(2-methyl-5-ethylpyridine) copper (ii) chloride

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767187A (en) * 1954-12-29 1956-10-16 Pittsburgh Coke & Chemical Co Isolation of gamma picoline
US2913323A (en) * 1956-10-24 1959-11-17 Monsanto Chemicals Herbicidal method and composition employing bis(2-methyl-5-ethylpyridine) copper (ii) chloride

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