GB955015A - Improvements in or relating to the production of anhydrous formaldehyde monomer - Google Patents

Improvements in or relating to the production of anhydrous formaldehyde monomer

Info

Publication number
GB955015A
GB955015A GB41400/60D GB4140060D GB955015A GB 955015 A GB955015 A GB 955015A GB 41400/60 D GB41400/60 D GB 41400/60D GB 4140060 D GB4140060 D GB 4140060D GB 955015 A GB955015 A GB 955015A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
inert liquid
inert
liquid medium
concentrate
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
GB41400/60D
Inventor
Alexander Ramsey Maund Gibb
Norman Stevenson Wallace
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB41400/60D priority Critical patent/GB955015A/en
Publication of GB955015A publication Critical patent/GB955015A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C47/00Compounds having —CHO groups
    • C07C47/02Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
    • C07C47/04Formaldehyde
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/78Separation; Purification; Stabilisation; Use of additives
    • C07C45/81Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C45/82Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation

Landscapes

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

Abstract

Anhydrous formaldehyde monomer is produced by a process wherein formaldehyde concentrate is heated in a distillation vessel with an inert liquid medium under distillation conditions at a temperature of at least 80 DEG C. whereby the liquid medium is evaporated and the formaldehyde concentrate is decomposed to form gaseous formaldehyde monomer, the evolved gases are cooled to condense inert liquid and water therefrom and gaseous formaldehyde is removed from the zone of condensation, "formaldehyde concentrate" being defined as "a material comprising formaldehyde for the most part, generally in the form of a low polymer, together with an appreciable amount of water", the term "inert liquid medium" signifying compounds which are inert to formaldehyde such as hydrocarbons, esters and ethers. The condensate is preferably run off to a separating vessel, the aqueous layer being discarded and the inert liquid layer being returned to the distillation vessel. An inert gas may be passed through the zone of condensation of the inert liquid. Examples are given in which the inert liquid is a petrol fraction, n-butyl acetate or decahydronaphthalene.
GB41400/60D 1961-11-20 1961-11-20 Improvements in or relating to the production of anhydrous formaldehyde monomer Expired GB955015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB41400/60D GB955015A (en) 1961-11-20 1961-11-20 Improvements in or relating to the production of anhydrous formaldehyde monomer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB41400/60D GB955015A (en) 1961-11-20 1961-11-20 Improvements in or relating to the production of anhydrous formaldehyde monomer

Publications (1)

Publication Number Publication Date
GB955015A true GB955015A (en) 1964-04-08

Family

ID=10419522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41400/60D Expired GB955015A (en) 1961-11-20 1961-11-20 Improvements in or relating to the production of anhydrous formaldehyde monomer

Country Status (1)

Country Link
GB (1) GB955015A (en)

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