GB397124A - Improvements in the manufacture of aromatic aldehydes - Google Patents

Improvements in the manufacture of aromatic aldehydes

Info

Publication number
GB397124A
GB397124A GB450532A GB450532A GB397124A GB 397124 A GB397124 A GB 397124A GB 450532 A GB450532 A GB 450532A GB 450532 A GB450532 A GB 450532A GB 397124 A GB397124 A GB 397124A
Authority
GB
United Kingdom
Prior art keywords
cyanide
hydrogen
chloride
dry
ether
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
GB450532A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB450532A priority Critical patent/GB397124A/en
Publication of GB397124A publication Critical patent/GB397124A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Aromatic aldehydes are manufactured by treating an aromatic hydrocarbon or an ether of a mono- or polyhydric phenol, preferably at 60 DEG C. or above, with hydrogen cyanide (or a metal cyanide), hydrogen chloride and an amount of aluminium chloride in excess of one molecule to every two CN groups in the hydrogen cyanide or metal cyanide, and treating the aldimine so obtained with acid. The process may be carried out by mixing the cold dry aromatic hydrocarbon or phenolic ether with dry aluminium chloride, adding hydrogen cyanide or a suitable metal cyanide, e.g. zinc cyanide, heating, passing dry hydrogen chloride and finally adding cold water and excess of hydrochloric acid. Examples describe the preparation, by the action of aluminium chloride, hydrogen cyanide and hydrogen chloride, of: (1) benzaldehyde from benzene; (2) p-tolualdehyde from toluene; (3) 2 : 4-dimethylbenzaldehyde from m-xylene. Other starting materials specified are: mesitylene, anisole, phenetole, diphenyl ether, dialkyl ethers of pyrocatechol, resorcinol or hydroquinone, di- and trialkyl ethers of pyrogallol or phloroglucinol. Specification 19204/97, [Class 2, Acids and salts, Organic &c.], is referred to.
GB450532A 1932-02-15 1932-02-15 Improvements in the manufacture of aromatic aldehydes Expired GB397124A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB450532A GB397124A (en) 1932-02-15 1932-02-15 Improvements in the manufacture of aromatic aldehydes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB450532A GB397124A (en) 1932-02-15 1932-02-15 Improvements in the manufacture of aromatic aldehydes

Publications (1)

Publication Number Publication Date
GB397124A true GB397124A (en) 1933-08-15

Family

ID=9778460

Family Applications (1)

Application Number Title Priority Date Filing Date
GB450532A Expired GB397124A (en) 1932-02-15 1932-02-15 Improvements in the manufacture of aromatic aldehydes

Country Status (1)

Country Link
GB (1) GB397124A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044002A1 (en) * 1980-07-16 1982-01-20 Bayer Ag Process for preparing 3-bromo-4-fluorobenzaldehyde (-acetals),3-bromo- 4-fluoro-benzoic acid nitrile and its preparation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044002A1 (en) * 1980-07-16 1982-01-20 Bayer Ag Process for preparing 3-bromo-4-fluorobenzaldehyde (-acetals),3-bromo- 4-fluoro-benzoic acid nitrile and its preparation

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