GB607978A - Improvements in and relating to method of producing vanillin - Google Patents

Improvements in and relating to method of producing vanillin

Info

Publication number
GB607978A
GB607978A GB1014/46A GB101446A GB607978A GB 607978 A GB607978 A GB 607978A GB 1014/46 A GB1014/46 A GB 1014/46A GB 101446 A GB101446 A GB 101446A GB 607978 A GB607978 A GB 607978A
Authority
GB
United Kingdom
Prior art keywords
oxygen
gas
vanillin
lignin
oxide
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
GB1014/46A
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.)
Ontario Paper Co Ltd
Original Assignee
Ontario Paper Co 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 Ontario Paper Co Ltd filed Critical Ontario Paper Co Ltd
Publication of GB607978A publication Critical patent/GB607978A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
    • 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
    • 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
    • C07C45/78—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0607978/IV(b)/1> Vanillin is obtained by suspending or dissolving lignin-containing substances in an alkaline medium and subjecting the same to the action of a finely divided gas containing oxygen such as air such that the partial pressure of oxygen in the raction vessel is less than 20 pounds per square inch at a temperature in excess of 150 DEG C., the reaction time being less than four hours. In a preferred feature of the invention the treatment with the oxidizing gas is carried out in the presence of a catalyst. The catalyst which is used consists either of the sludge residual in a reaction mixture in which vanillin has been produced by subjecting lignin-containing substances to the action of an oxygen containing gas in an alkaline medium to which has been added an auxiliary oxidizing agent, or of one of certain specific auxiliary oxidizing agents which have been used to obtain vanillin from lignin containing substances. Such oxidizing agents comprise inorganic oxides and salts which are easily reduced under alkaline conditions and include copper oxide, copper sulphate, cobalt oxide, cobalt nitrate, cerium oxide, lead oxide, manganese dioxide, and ferric chloride. The reaction is preferably carried out in an apparatus which comprises a bomb 1, fitted with an exit 3 in the cover 2 through which vapours pass to the condensing system 4 which terminates in a control relief valve 5 set to a predetermined pressure. An oxygen-containing gas is introduced through a porous plate 6. The bomb is also fitted with a pressure gauge 11 and a thermometer 13, and heated by gas flame 14. Examples are given of varying reaction conditions within the invention.
GB1014/46A 1945-07-09 1946-01-11 Improvements in and relating to method of producing vanillin Expired GB607978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA607978X 1945-07-09

Publications (1)

Publication Number Publication Date
GB607978A true GB607978A (en) 1948-09-08

Family

ID=4171939

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1014/46A Expired GB607978A (en) 1945-07-09 1946-01-11 Improvements in and relating to method of producing vanillin

Country Status (1)

Country Link
GB (1) GB607978A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598311A (en) * 1952-05-27 Manufacture of vanillin
US2692291A (en) * 1950-06-06 1954-10-19 Monsanto Chemicals Manufacture of vanillin from lignin
DE1009472B (en) * 1953-04-16 1957-05-29 Waldhof Zellstoff Fab Process for the production of cellulose with the recovery of other valuable substances such as vanillin, acetovanillon and dioxystilbene

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2598311A (en) * 1952-05-27 Manufacture of vanillin
US2692291A (en) * 1950-06-06 1954-10-19 Monsanto Chemicals Manufacture of vanillin from lignin
DE1009472B (en) * 1953-04-16 1957-05-29 Waldhof Zellstoff Fab Process for the production of cellulose with the recovery of other valuable substances such as vanillin, acetovanillon and dioxystilbene

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