GB643700A - Purification of acetic anhydride - Google Patents

Purification of acetic anhydride

Info

Publication number
GB643700A
GB643700A GB20376/48A GB2037648A GB643700A GB 643700 A GB643700 A GB 643700A GB 20376/48 A GB20376/48 A GB 20376/48A GB 2037648 A GB2037648 A GB 2037648A GB 643700 A GB643700 A GB 643700A
Authority
GB
United Kingdom
Prior art keywords
acetic anhydride
purification
anhydride
weight
nitrite
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
GB20376/48A
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 GB643700A publication Critical patent/GB643700A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54Preparation of carboxylic acid anhydrides
    • C07C51/573Separation; Purification; Stabilisation; Use of additives

Landscapes

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

Abstract

Acetic anhydride is purified by distilling in presence of sodium nitrite, the anhydride having been produced by thermal dehydration of acetic acid in presence of an ammonium phosphate catalyst. The amount of nitrite is preferably 0.1-0.5 per cent by weight of the weight of anhydride.
GB20376/48A 1947-08-13 1948-07-30 Purification of acetic anhydride Expired GB643700A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US643700XA 1947-08-13 1947-08-13

Publications (1)

Publication Number Publication Date
GB643700A true GB643700A (en) 1950-09-27

Family

ID=22055465

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20376/48A Expired GB643700A (en) 1947-08-13 1948-07-30 Purification of acetic anhydride

Country Status (1)

Country Link
GB (1) GB643700A (en)

Similar Documents

Publication Publication Date Title
ES343513A1 (en) 1,6-dimethyl-2,3-dihydro-10alpha-ergoline derivatives
GB643700A (en) Purification of acetic anhydride
NL146143B (en) PROCESS FOR THE PREPARATION OF BENZENE CARBON ACIDS.
GB609325A (en) Improved process for the prevention of putrescence in alkaline casein solutions
GB550854A (en) Improvements in or relating to the manufacture of esters of chlorine containing organic acids
GB653197A (en) Purification of propionic acid
GB1262607A (en) PROCESS FOR THE MANUFACTURE OF beta-ACETOXYPIVALIC ALDEHYDE
GB616456A (en) Improvements in or relating to the production of normal lead dinitroresorcinate
GB1080333A (en) New 14-hydroxy steroids
GB587750A (en) Improvements in or relating to the production of derivatives of hexahydrobenzyl alcohol
GB1118753A (en) Nitro-derivatives of uron and urea
McKay Utilization of energy substrates by ruminants exposed to cold
FR980616A (en) Process for the preparation of 1-hydroxy-2-amino-6-methyl-4-benzenesulfonic acid diazonium compounds
GR12094B (en) PREPARATION METHOD C - METHYLMERCAPTO - A - AMINOBUTYRIC ACID.
CH274521A (en) Process for the preparation of 2-phenyl-3,4,5,6-tetrahydrobenzoic acid.
GB624136A (en) Process for stabilising dichlorodiphenyltrichloroethane
FR953127A (en) Process for the preparation of cyanoethyl derivatives of 1, 3, 5-trimethylenetrisulfone
GB616762A (en) Improvements in or relating to the manufacture of chlorinated derivatives of 2:5-dihydrofuran
AU149327B2 (en) Improvements in or relating to processes of purifying crude amino dicarboxylic acid
GB682132A (en) Improvements in or relating to the preparation of beta-substituted acrylic acids
ES204771A1 (en) A procedure for the obtaining of 4-monoalquilaminosalicºlicos acids and 4-monoalquiloxialquilaminosalicºlicos acids (Machine-translation by Google Translate, not legally binding)
FR2054955A5 (en) Antimicrobial n-subst 6,7-methylenedioxy-4- - quinolone derivs prepn
GB1106886A (en) Preparation of steroid 3-ketal derivatives
AU140245B2 (en) Improvements relating to smokers' pipes
FR57869E (en) Process for the preparation of nitrogenous derivatives of carbonic acid