GB405141A - Manufacture of 3-methylal-pentane and 3-methylol-pentane - Google Patents

Manufacture of 3-methylal-pentane and 3-methylol-pentane

Info

Publication number
GB405141A
GB405141A GB10467/33A GB1046733A GB405141A GB 405141 A GB405141 A GB 405141A GB 10467/33 A GB10467/33 A GB 10467/33A GB 1046733 A GB1046733 A GB 1046733A GB 405141 A GB405141 A GB 405141A
Authority
GB
United Kingdom
Prior art keywords
pentane
methylal
methylol
hydrogenation
aldehyde
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
GB10467/33A
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie AG
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 Wacker Chemie AG filed Critical Wacker Chemie AG
Publication of GB405141A publication Critical patent/GB405141A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/17—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
    • C07C29/175—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds with simultaneous reduction of an oxo group

Landscapes

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

Abstract

3-Methylal- and 3-methylol-pentane are prepared by subjecting acetaldehyde and butyraldehyde to the aldol condensation, dehydrating the resulting acet-butyraldol, and hydrogenating the 3-methylalpentene-2 so formed. When the hydrogenation is carried to the alcohol stage, the latter may then be dehydrogenated to the aldehyde. The aldol condensation is effected with the aid of caustic alkali solution at a temperature of 3--10 DEG C.; dehydration occurs on subsequent distillation. The hydrogenation may take place in the liquid or vapour phase in the presence of such catalysts as nickel and copper, using temperatures below 100 DEG C. for the production of the aldehyde and from 100--200 DEG C. for producing the alcohol; dehydrogenation is carried out at a temperature above 200 DEG C. in the presence of, say, copper or zinc. Examples are given.
GB10467/33A 1932-11-26 1933-04-07 Manufacture of 3-methylal-pentane and 3-methylol-pentane Expired GB405141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE405141X 1932-11-26

Publications (1)

Publication Number Publication Date
GB405141A true GB405141A (en) 1934-02-01

Family

ID=6421882

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10467/33A Expired GB405141A (en) 1932-11-26 1933-04-07 Manufacture of 3-methylal-pentane and 3-methylol-pentane

Country Status (1)

Country Link
GB (1) GB405141A (en)

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