GB666435A - Purifying methyl ethyl ketone by a distillation and extraction process - Google Patents

Purifying methyl ethyl ketone by a distillation and extraction process

Info

Publication number
GB666435A
GB666435A GB15676/49A GB1567649A GB666435A GB 666435 A GB666435 A GB 666435A GB 15676/49 A GB15676/49 A GB 15676/49A GB 1567649 A GB1567649 A GB 1567649A GB 666435 A GB666435 A GB 666435A
Authority
GB
United Kingdom
Prior art keywords
distillation
column
water
extractor
pentane
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
GB15676/49A
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.)
Acordis UK Ltd
Original Assignee
British Celanese 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 British Celanese Ltd filed Critical British Celanese Ltd
Publication of GB666435A publication Critical patent/GB666435A/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
    • C07C45/78—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
    • C07C45/83—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by extractive 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
    • C07C45/78—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
    • C07C45/84—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by azeotropic distillation

Landscapes

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

Abstract

<PICT:0666435/III/1> Purified methyl ethyl ketone is obtained from a mixture boiling between 68 and 75 DEG C and comprising methyl ethyl ketone, together with tetrahydrofurane, 2-methyl tetrahydrofurane, formals, acetals and oxides by distilling the mixture with hexane to separate an overhead fraction containing hexane and M.E.K., extracting M.E.K. from the fraction with water, subjecting the aqueous extract to extractive distillation with water to wash acetals therefrom and distil off the aqueous azeotrope of M.E.K., extracting M.E.K. from the aqueous azeotrope with a water-immiscible solvent, and separating the purified M.E.K. from the solvent by distillation. The process is particularly applicable to the separation of M.E.K. from the products obtained by the partial oxidation of butane or a mixture of propane and butane. The narrow boiling mixture referred to above may be obtained from the oxidation products by extraction with pentane, stripping pentane from the extract, and then submitting it to fractionation. A mixture of M.E.K., tetrahydrofurane, 2-methyl tetrahydrofurane, formals, acetals and oxides, is fed to distillation-coloumn 1 and a fraction boiling below 68 DEG C is taken off overhead. Part of the material from reboiler 4 is passed to distillation-coloumn 5 from which the fraction coming overhead up to 75 DEG C is passed, via condenser 6. to distillation-column 8 together with 1 to 4 volumes of hexane. A fraction coming over from column 8 up to 65 DEG C, containing hexane and M.E.K., is taken off via condenser 9, and fed to extractor 12, together with 4 to 8 volumes of water. The hexane which separates in extractor 12, is recycled to column 8; while the aqueous extract is fed to distillation-column 13. Water is supplied to column 13 in sufficient volume to maintain the concentration of water at from 50 to 80 volume per cent on each tray of the column. The M.E.K./water azeotrope taken off overhead is condensed; the condensate is mixed with 2 to 4 volumes of pentane and introduced into extractor 17. The upper layer which forms in extractor 17 comprises M.E.K. and pentane, and is fed to distillation-column 18 from which pentane is recovered overhead and recycled to extractor 17, while purified M.E.K. is removed from reboiler 21.
GB15676/49A 1948-06-14 1949-06-13 Purifying methyl ethyl ketone by a distillation and extraction process Expired GB666435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US666435XA 1948-06-14 1948-06-14

Publications (1)

Publication Number Publication Date
GB666435A true GB666435A (en) 1952-02-13

Family

ID=22070777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15676/49A Expired GB666435A (en) 1948-06-14 1949-06-13 Purifying methyl ethyl ketone by a distillation and extraction process

Country Status (1)

Country Link
GB (1) GB666435A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149706B (en) * 1961-09-13 1963-06-06 Consortium Elektrochem Ind Process for dewatering butanone
US3409513A (en) * 1964-11-27 1968-11-05 Distillers Co Yeast Ltd Purification of acetone by hydroextractive distillation
US3657074A (en) * 1968-03-21 1972-04-18 Wrigley W M Jun Co Purification of pyruvaldehyde

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1149706B (en) * 1961-09-13 1963-06-06 Consortium Elektrochem Ind Process for dewatering butanone
US3409513A (en) * 1964-11-27 1968-11-05 Distillers Co Yeast Ltd Purification of acetone by hydroextractive distillation
US3657074A (en) * 1968-03-21 1972-04-18 Wrigley W M Jun Co Purification of pyruvaldehyde

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