GB1124797A - Preparation of unsaturated compounds - Google Patents

Preparation of unsaturated compounds

Info

Publication number
GB1124797A
GB1124797A GB3124665A GB3124665A GB1124797A GB 1124797 A GB1124797 A GB 1124797A GB 3124665 A GB3124665 A GB 3124665A GB 3124665 A GB3124665 A GB 3124665A GB 1124797 A GB1124797 A GB 1124797A
Authority
GB
United Kingdom
Prior art keywords
catalyst
preparation
compound
phosphomolybdate
formula
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
GB3124665A
Inventor
Charles Frank Howlett Tipper
Crauford John Matthews
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.)
CHARLES FRANK HOWLETT TIPPER
Original Assignee
CHARLES FRANK HOWLETT TIPPER
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 CHARLES FRANK HOWLETT TIPPER filed Critical CHARLES FRANK HOWLETT TIPPER
Priority to GB3124665A priority Critical patent/GB1124797A/en
Publication of GB1124797A publication Critical patent/GB1124797A/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
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/673—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by change of size of the carbon skeleton
    • 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
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
    • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
    • 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
    • C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C07C45/54—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition of compounds containing doubly bound oxygen atoms, e.g. esters
    • 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
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/65—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by splitting-off hydrogen atoms or functional groups; by hydrogenolysis of functional groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/347—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups
    • C07C51/377—Preparation of carboxylic acids or their salts, halides or anhydrides by reactions not involving formation of carboxyl groups by splitting-off hydrogen or functional groups; by hydrogenolysis of functional groups

Abstract

Preparation of an a ,b -olefinically unsaturated compound by contacting the vapour of the corresponding saturated compound of the formula <FORM:1124797/C2/1> wherein R1, R2 and R3 represent hydrogen o alkyl (1-4c) and R4 represents hydrogen, hydroxy or alkoxy (1-4c) and a gas containing free oxygen with a catalyst comprising an oxide of a transition metal or a complex oxygen containing compound of a Group VIALPHA metal. Compounds of the above general formula wherein any alkyl groups present are methyl or ethyl groups are preferred particularly isobutyraldehyde and isobutyric acid although propionaldehyde or propionic acid may also be used. The preferred catalysts are oxides of vanadium, molubdenum, tungsten, or cobalt or a complex silicomolybdate, silicophosphomolybdate or phosphomolybdate (particularly a bismuth phosphomolybdate of the formula Bi9PMo12O52) or a corresponding tungstate. The process is preferably carried out by contacting the vapour of the saturated compound and the gas containing free oxygen optionally in the presence of an inert gas with the catalyst at a temperature in the range 300 DEG to 400 DEG C. The preparation of methacrolein together with acetone, propionaldehyde and acetaldehyde, and of methacrylic acid together with acetone from isobutyraldehyde and isobutyric acid respectively is described using bismuth phosphomolybdate or vanadium pentoxide or molybdenum trioxide as catalyst.
GB3124665A 1965-07-22 1965-07-22 Preparation of unsaturated compounds Expired GB1124797A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3124665A GB1124797A (en) 1965-07-22 1965-07-22 Preparation of unsaturated compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3124665A GB1124797A (en) 1965-07-22 1965-07-22 Preparation of unsaturated compounds

Publications (1)

Publication Number Publication Date
GB1124797A true GB1124797A (en) 1968-08-21

Family

ID=10320239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3124665A Expired GB1124797A (en) 1965-07-22 1965-07-22 Preparation of unsaturated compounds

Country Status (1)

Country Link
GB (1) GB1124797A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061673A (en) * 1976-07-30 1977-12-06 Mitsubishi Chemical Industries Ltd. Manufacture of methacrylic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061673A (en) * 1976-07-30 1977-12-06 Mitsubishi Chemical Industries Ltd. Manufacture of methacrylic acid

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