BE1002441A6 - SOLVENT PURIFICATION PROCESS. - Google Patents

SOLVENT PURIFICATION PROCESS. Download PDF

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Publication number
BE1002441A6
BE1002441A6 BE9001058A BE9001058A BE1002441A6 BE 1002441 A6 BE1002441 A6 BE 1002441A6 BE 9001058 A BE9001058 A BE 9001058A BE 9001058 A BE9001058 A BE 9001058A BE 1002441 A6 BE1002441 A6 BE 1002441A6
Authority
BE
Belgium
Prior art keywords
mixture
reflux
purification process
heated
added
Prior art date
Application number
BE9001058A
Other languages
French (fr)
Inventor
Gerard Kenny
Miles Harcourt
Original Assignee
G K Analytical Sciences 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 G K Analytical Sciences Ltd filed Critical G K Analytical Sciences Ltd
Application granted granted Critical
Publication of BE1002441A6 publication Critical patent/BE1002441A6/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C255/00—Carboxylic acid nitriles
    • C07C255/01—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms
    • C07C255/02—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and saturated carbon skeleton
    • C07C255/03—Mononitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C253/00—Preparation of carboxylic acid nitriles
    • C07C253/32—Separation; Purification; Stabilisation; Use of additives
    • C07C253/34—Separation; Purification

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

Abstract

L'acétonitrile brut contenant des impuretés est purifié par addition du produit brut et d'un agent oxydant tel le permanganate de potassium à un cuve de reflux 2 d'une unité de distillation à bain. Si le niveau d'alcool est élevé une petite quantité d'acide phosphorique est ajoutée. Le mélange est chauffé pendnt au moins une demi-heure à une température d'au moins 40 degrés C. Une base telle que le phosphate de sodium est alors ajoutée et le mélange est chauffé à reflux. Le stade final du procédé de purification fait intervenir l'addition d'un agent déshydratant tel que le pentoxyde de phosphore et le chauffage du mélange à reflux. Un très grand degré de pureté d'au moins 99.8 % est ainsi obtenu.The crude acetonitrile containing impurities is purified by adding the crude product and an oxidizing agent such as potassium permanganate to a reflux tank 2 of a distillation unit in a bath. If the alcohol level is high a small amount of phosphoric acid is added. The mixture is heated for at least half an hour at a temperature of at least 40 degrees C. A base such as sodium phosphate is then added and the mixture is heated to reflux. The final stage of the purification process involves the addition of a dehydrating agent such as phosphorus pentoxide and heating the mixture at reflux. A very high degree of purity of at least 99.8% is thus obtained.

BE9001058A 1990-10-30 1990-11-09 SOLVENT PURIFICATION PROCESS. BE1002441A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9023530A GB2249308B (en) 1990-10-30 1990-10-30 Solvent purification

Publications (1)

Publication Number Publication Date
BE1002441A6 true BE1002441A6 (en) 1991-02-12

Family

ID=10684534

Family Applications (1)

Application Number Title Priority Date Filing Date
BE9001058A BE1002441A6 (en) 1990-10-30 1990-11-09 SOLVENT PURIFICATION PROCESS.

Country Status (2)

Country Link
BE (1) BE1002441A6 (en)
GB (1) GB2249308B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440068A (en) * 1993-12-30 1995-08-08 The Standard Oil Company Acetonitrile purification via an adsorption-based process
EP0723954A1 (en) * 1995-01-25 1996-07-31 The Standard Oil Company Acetonitrile purification via an adsorption-based process
TR28966A (en) * 1995-03-14 1997-07-21 Standard Oil Co Ohio Purification of acetonitrile through adsorption-based processing.

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5629443A (en) * 1993-05-14 1997-05-13 Asahi Kasei Kogyo Kabushiki Kaisha Highly purified acetonitrile and process for purifying crude acetonitrile
GB2435040B (en) * 2006-02-08 2009-10-07 G K Analytical Sciences Ltd Acetonitrile purification by the addition of phosphorus pentoxide, then water, and subsequent distillation
JP6038157B2 (en) * 2012-08-31 2016-12-07 旭化成株式会社 Acetonitrile purification method
CN104744299A (en) * 2013-12-31 2015-07-01 上海星可高纯溶剂有限公司 Method for purifying high pure organic solvent acetonitrile
US10336690B2 (en) * 2014-02-24 2019-07-02 Honeywell International Inc. Methods and systems for processing an acetonitrile waste stream
CN104529821B (en) * 2014-12-31 2017-03-29 南通醋酸化工股份有限公司 A kind of method for removing the acrylonitrile in acetonitrile product

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1318588A1 (en) * 1985-08-26 1987-06-23 Всесоюзный Научно-Исследовательский Институт Химических Реактивов И Особо Чистых Химических Веществ Method for purifying acetonitrile

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440068A (en) * 1993-12-30 1995-08-08 The Standard Oil Company Acetonitrile purification via an adsorption-based process
EP0723954A1 (en) * 1995-01-25 1996-07-31 The Standard Oil Company Acetonitrile purification via an adsorption-based process
TR28966A (en) * 1995-03-14 1997-07-21 Standard Oil Co Ohio Purification of acetonitrile through adsorption-based processing.

Also Published As

Publication number Publication date
GB2249308B (en) 1994-05-18
GB2249308A (en) 1992-05-06
GB9023530D0 (en) 1990-12-12

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: G.K. ANALYTICAL SCIENCES LTD

Effective date: 19961109