GB319747A - Process of producing vanillin - Google Patents

Process of producing vanillin

Info

Publication number
GB319747A
GB319747A GB29291/29A GB2929129A GB319747A GB 319747 A GB319747 A GB 319747A GB 29291/29 A GB29291/29 A GB 29291/29A GB 2929129 A GB2929129 A GB 2929129A GB 319747 A GB319747 A GB 319747A
Authority
GB
United Kingdom
Prior art keywords
vanillin
acid
extracted
sulphuric
materials
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
GB29291/29A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB319747A publication Critical patent/GB319747A/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
    • C07C45/27—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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

319,747. Pauly, H., and Feuerstein, K. Sept. 27, 1928, [Convention date]. Vanillin is obtained by treating at temperatures of 90‹ C. or below lignins, or materials containing the latter with oxidizing agents used for oxidizing aromatic isopropenyl compounds to aldehydes, the quantity of oxidizing agent employed corresponding to the obtainable amount of vanillin and being determined empirically for each sample of raw material by plotting the yield of vanillin against the quantity of oxidizing agent taken. The following starting materials are mentioned : incrusted vegetable fibrous materials such as mosses, grasses, straw, esparto, hemp, flax, jute, ramie, wood, aged vegetable materials such as peat, lignite and brown coal, lyes containing lignins, and lignin constituents separated therefrom e.g., straw, lye lignin and the constituents of cellulose lyes, such as ligninsulphonic acid. After extraction of the vanillin, the mass mav be hydrolyzed with acids and a second yield of vanillin obtained. According to examples: (1) pine wood sawdust is oxidized with ozone in the presence of acetic acid until it is decolorized. The product is hydrolized with sulphuric acid and extracted with ether after removing excess of sulphuric and acetic acids; (2) dry powdered peat is treated with a solution of chromic acid in acetic acid, hydrolyzed with sulphuric acid and the vanillin extracted as in example 1. Chromates, permanganates, and activated oxygen are also mentioned as suitable oxidizing agents. The Specification as open to inspection under Sect. 91 (8) (a) comprises also the following example : a mixture of ligninsulphonic acid and sulphanilic acid is oxidized by means of chromic acid. After treatment with sulphuric acid, the vanillin is extracted with benzol. This subjectmatter does not appear in the Specification as accepted.
GB29291/29A 1928-09-27 1929-09-27 Process of producing vanillin Expired GB319747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP58669D DE552887C (en) 1928-09-27 1928-09-27 Method for the preparation of vanillin

Publications (1)

Publication Number Publication Date
GB319747A true GB319747A (en) 1931-01-27

Family

ID=7389023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29291/29A Expired GB319747A (en) 1928-09-27 1929-09-27 Process of producing vanillin

Country Status (5)

Country Link
AT (1) AT128856B (en)
CH (1) CH145982A (en)
DE (1) DE552887C (en)
DK (1) DK44507C (en)
GB (1) GB319747A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006412B (en) * 1954-05-11 1957-04-18 Otto Kleinnikel Process for the preparation of organic acids, in particular benzene carboxylic acids
FR2617845A1 (en) * 1987-07-09 1989-01-13 Organocell Zellstoff Umwelttec PROCESS FOR THE TREATMENT OF LIGNINS FOR THE PRODUCTION OF ALDEHYDES AND / OR PHENOLIC ACIDS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE869202C (en) * 1942-09-30 1953-03-05 Karl Freudenberg Dr Process for the production of vanillin from fermented or unfermented sulphite waste liquor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006412B (en) * 1954-05-11 1957-04-18 Otto Kleinnikel Process for the preparation of organic acids, in particular benzene carboxylic acids
FR2617845A1 (en) * 1987-07-09 1989-01-13 Organocell Zellstoff Umwelttec PROCESS FOR THE TREATMENT OF LIGNINS FOR THE PRODUCTION OF ALDEHYDES AND / OR PHENOLIC ACIDS

Also Published As

Publication number Publication date
DK44507C (en) 1931-08-17
AT128856B (en) 1932-06-25
DE552887C (en) 1932-06-18
CH145982A (en) 1931-03-31

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