GB331637A - Improvements in the concentration or extraction of organic acids occurring in aqueous solution - Google Patents

Improvements in the concentration or extraction of organic acids occurring in aqueous solution

Info

Publication number
GB331637A
GB331637A GB14721/29A GB1472129A GB331637A GB 331637 A GB331637 A GB 331637A GB 14721/29 A GB14721/29 A GB 14721/29A GB 1472129 A GB1472129 A GB 1472129A GB 331637 A GB331637 A GB 331637A
Authority
GB
United Kingdom
Prior art keywords
water
heptane
extraction
formic acid
propionic acid
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
GB14721/29A
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.)
DISTILLERIES DES DEUX SEVRES
Original Assignee
DISTILLERIES DES DEUX SEVRES
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 DISTILLERIES DES DEUX SEVRES filed Critical DISTILLERIES DES DEUX SEVRES
Publication of GB331637A publication Critical patent/GB331637A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
    • C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
    • C07C51/46—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation by azeotropic distillation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

331,637. Soc. Anon. des Distilleries des Deux-Sevres. March 20, 1929, [Convention date]. Addition to 312,046. Drawings to Specification. Carboxylic acids; formic acid; propionic acid. -The process of the parent Specification is applied to the extraction from aqueous solutions of acids of the fatty series, other than acetic acid. In an example propionic acid is extracted by means of butyl propionate, and the extract is dehydrated by distillation with an entraining liquid consisting of a petroleum fraction boiling between 138-140‹ C. With water this forms an azeotropic mixture boiling at 90‹ C., while the propionic acid forms with it a second mixture boiling at 134‹ C., which when condensed separates into two layers on the addition of a trace of water. In a similar way, formic acid is extracted by means of amyl formate, and is distilled with normal heptane; water distils off with the heptane at 79‹ C., followed by formic acid and heptane at 79.5‹ C. The apparatus used is identical with that of the parent Applica. tion.
GB14721/29A 1929-03-20 1929-05-10 Improvements in the concentration or extraction of organic acids occurring in aqueous solution Expired GB331637A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR331637X 1929-03-20

Publications (1)

Publication Number Publication Date
GB331637A true GB331637A (en) 1930-07-10

Family

ID=8890948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14721/29A Expired GB331637A (en) 1929-03-20 1929-05-10 Improvements in the concentration or extraction of organic acids occurring in aqueous solution

Country Status (1)

Country Link
GB (1) GB331637A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106748737A (en) * 2016-11-16 2017-05-31 南京师范大学 A kind of method of formic acid in azeotropic extraction rectifying concentration aqueous formic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106748737A (en) * 2016-11-16 2017-05-31 南京师范大学 A kind of method of formic acid in azeotropic extraction rectifying concentration aqueous formic acid

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