GB584788A - Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol - Google Patents

Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol

Info

Publication number
GB584788A
GB584788A GB485143A GB485143A GB584788A GB 584788 A GB584788 A GB 584788A GB 485143 A GB485143 A GB 485143A GB 485143 A GB485143 A GB 485143A GB 584788 A GB584788 A GB 584788A
Authority
GB
United Kingdom
Prior art keywords
glycol
acids
per cent
methyl ethyl
ethyl ketone
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
GB485143A
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers 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 Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB485143A priority Critical patent/GB584788A/en
Publication of GB584788A publication Critical patent/GB584788A/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
    • C07C45/51—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
    • C07C45/52—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 by dehydration and rearrangement involving two hydroxy groups in the same molecule

Landscapes

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

Abstract

A continuous process for the production of methyl ethyl ketone comprises heating 2 : 3-butylene glycol under atmospheric pressure in the presence of up to 10 per cent, preferably 5 to 10 per cent by weight of the glycol, of a relatively non-volatile strong acid in the substantial absence of inert diluent or solvent and adding fresh quantities of said glycol at a rate approximately equal to its rate of conversion whilst continuously distilling off the methylethylketone and water as they are formed. The acids are defined as being those acids relatively non-volatile in relation to said glycol which will substantially completely dissociate in concentrated aqueous solutions as opposed to weak acids which will substantially completely dissociate only at a high degree of dilution. Acids which may be used include sulphuric, phosphoric, trichloracetic and p-toluene sulphonic acids. The process may be carried out in a heated reaction kettle fitted with a reflux column to prevent entrainment of glycol by the effluent vapours. In addition to methyl ethyl ketone, small quantities of 3 : 4-dimethyl - D 3 - hexane - 2 - one are formed. An example is given in which 96 per cent by weight sulphuric acid is employed as dehydrating agent, and a reflux temperature of 73-80 DEG C. is maintained.
GB485143A 1943-03-25 1943-03-25 Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol Expired GB584788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB485143A GB584788A (en) 1943-03-25 1943-03-25 Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB485143A GB584788A (en) 1943-03-25 1943-03-25 Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol

Publications (1)

Publication Number Publication Date
GB584788A true GB584788A (en) 1947-01-23

Family

ID=9784995

Family Applications (1)

Application Number Title Priority Date Filing Date
GB485143A Expired GB584788A (en) 1943-03-25 1943-03-25 Improvements in or relating to the production of methylethylketone from 2:3-butyleneglycol

Country Status (1)

Country Link
GB (1) GB584788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102351672A (en) * 2011-10-31 2012-02-15 华东理工大学 Method for continuously and efficiently preparing methyl ethyl ketone

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102351672A (en) * 2011-10-31 2012-02-15 华东理工大学 Method for continuously and efficiently preparing methyl ethyl ketone

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