GB472545A - Improvements relating to the preparation, purification or separation of oxo-compounds - Google Patents

Improvements relating to the preparation, purification or separation of oxo-compounds

Info

Publication number
GB472545A
GB472545A GB8648/36A GB864836A GB472545A GB 472545 A GB472545 A GB 472545A GB 8648/36 A GB8648/36 A GB 8648/36A GB 864836 A GB864836 A GB 864836A GB 472545 A GB472545 A GB 472545A
Authority
GB
United Kingdom
Prior art keywords
bisulphite
vanillin
separation
formaldehyde
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
GB8648/36A
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
Priority to GB8648/36A priority Critical patent/GB472545A/en
Publication of GB472545A publication Critical patent/GB472545A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
    • C07C403/14—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms
    • C07C403/16—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms not being part of —CHO groups
    • 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
    • C07C45/78—Separation; Purification; Stabilisation; Use of additives
    • C07C45/85—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated

Landscapes

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

Abstract

Aldehydes and ketones are isolated from mixtures containing them by decomposing their bisulphite compounds with formaldehyde, acetaldehyde or acetone. As the decomposition takes place at a specific temperature, the process may also be applied to the separation of one aldehyde from another. Examples are given of the isolation of phenylacetaldehyde from the crude material which contains polymers, the isolation of benzoic aldehyde from the crude product containing chloro impurities, and the separation of b -ionone from a -ionone; in each case the material is converted into its bisulphite compound, an amount of formaldehyde is then added equivalent to the desired product and the whole is heated to a definite temperature. The decomposition temperatures of the bisulphite compounds of vanillin, ethylvanillin, n-heptylaldehyde, tolylaldehyde, salicylic aldehyde, heliotropine and n-decylaldehyde with formaldehyde, of n-heptylaldehyde bisulphite with acetaldehyde, and of methyl-n-nonylketone bisulphite with acetone, are stated. In the case of vanillin, the crude vanillin bisulphite is treated with formaldehyde, when the guaiacoldialdehyde impurity separates out at 26 DEG C., the isovanillin impurity at 32 DEG C., the o-vanillin impurity at 34 DEG C., and substantially pure vanillin at 42 DEG C. Reference is also made to the separation of citral from citronellal, the aliphatic C7 to C12 aldehydes from one another, and the isolation of a -amyl-cinnamic aldehyde from the impure material.
GB8648/36A 1936-03-23 1936-03-23 Improvements relating to the preparation, purification or separation of oxo-compounds Expired GB472545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8648/36A GB472545A (en) 1936-03-23 1936-03-23 Improvements relating to the preparation, purification or separation of oxo-compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8648/36A GB472545A (en) 1936-03-23 1936-03-23 Improvements relating to the preparation, purification or separation of oxo-compounds

Publications (1)

Publication Number Publication Date
GB472545A true GB472545A (en) 1937-09-23

Family

ID=9856518

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8648/36A Expired GB472545A (en) 1936-03-23 1936-03-23 Improvements relating to the preparation, purification or separation of oxo-compounds

Country Status (1)

Country Link
GB (1) GB472545A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457257A (en) * 1947-09-24 1948-12-28 Stanolind Oil & Gas Co Separation of oxygeated compound with bisulfite adducts
US2555553A (en) * 1947-09-24 1951-06-05 Stanolind Oil & Gas Co Separation of aldehydes and ketones from mixtures thereof
US2625560A (en) * 1947-09-24 1953-01-13 Stanolind Oil & Gas Co Separation of oxygenated compounds with bisulfite adducts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457257A (en) * 1947-09-24 1948-12-28 Stanolind Oil & Gas Co Separation of oxygeated compound with bisulfite adducts
US2555553A (en) * 1947-09-24 1951-06-05 Stanolind Oil & Gas Co Separation of aldehydes and ketones from mixtures thereof
US2625560A (en) * 1947-09-24 1953-01-13 Stanolind Oil & Gas Co Separation of oxygenated compounds with bisulfite adducts

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