GB966639A - Process for recovering acetaldehyde from a crude aldol condensation product - Google Patents

Process for recovering acetaldehyde from a crude aldol condensation product

Info

Publication number
GB966639A
GB966639A GB33138/62A GB3313862A GB966639A GB 966639 A GB966639 A GB 966639A GB 33138/62 A GB33138/62 A GB 33138/62A GB 3313862 A GB3313862 A GB 3313862A GB 966639 A GB966639 A GB 966639A
Authority
GB
United Kingdom
Prior art keywords
acetaldehyde
condensation product
aldol condensation
distilling
temperature
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
GB33138/62A
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.)
JNC Corp
Original Assignee
Chisso Corp
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 Chisso Corp filed Critical Chisso Corp
Publication of GB966639A publication Critical patent/GB966639A/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
    • C07C45/78—Separation; Purification; Stabilisation; Use of additives
    • C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
    • 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
    • C07C45/68—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 increase in the number of carbon atoms
    • C07C45/72—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 increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • C07C45/74—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 increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups combined with dehydration
    • 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
    • C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • 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
    • C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • 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

Landscapes

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

Abstract

Acetaldehyde is removed from a crude aldol condensation product of acetaldehyde thereby purifying the aldol by distilling the product in two distillation steps, the first of which is carried out under a gauge pressure of more than 0.5 kg./cm2 in a distilling tower, the temperature of the liquor under treatment in the still being below 113 DEG C. and the second distilling step being carried out under atmospheric or reduced pressure in the same or another distilling tower, the temperature of the liquor in the still also being below 113 DEG C. Preferably 40-80% of the recoverable acetaldehyde is removed in the first step. Preferably the temperature in both towers is in the range 100-110 DEG C.
GB33138/62A 1961-09-09 1962-08-29 Process for recovering acetaldehyde from a crude aldol condensation product Expired GB966639A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3301061 1961-09-09

Publications (1)

Publication Number Publication Date
GB966639A true GB966639A (en) 1964-08-12

Family

ID=12374838

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33138/62A Expired GB966639A (en) 1961-09-09 1962-08-29 Process for recovering acetaldehyde from a crude aldol condensation product

Country Status (2)

Country Link
DE (1) DE1179921B (en)
GB (1) GB966639A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE923250C (en) * 1942-03-20 1955-02-07 Melle Usines Sa Multi-stage process for the continuous production of aldoles
DE909570C (en) * 1942-08-08 1954-04-22 Consortium Elektrochem Ind Process for the production of aldoles

Also Published As

Publication number Publication date
DE1179921B (en) 1964-10-22

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