FR2409975A1 - PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS - Google Patents

PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS

Info

Publication number
FR2409975A1
FR2409975A1 FR7735920A FR7735920A FR2409975A1 FR 2409975 A1 FR2409975 A1 FR 2409975A1 FR 7735920 A FR7735920 A FR 7735920A FR 7735920 A FR7735920 A FR 7735920A FR 2409975 A1 FR2409975 A1 FR 2409975A1
Authority
FR
France
Prior art keywords
formaldehyde
solution
aqueous solutions
isolating
extract solution
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.)
Granted
Application number
FR7735920A
Other languages
French (fr)
Other versions
FR2409975B1 (en
Inventor
Boris Izrailevich Pantukh
Olga Ardalionovna Lavrova
Tatyana Mikhailovna Lesteva
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.)
STERLITAMAXKY O PROMYSHLENNY
Original Assignee
STERLITAMAXKY O PROMYSHLENNY
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 STERLITAMAXKY O PROMYSHLENNY filed Critical STERLITAMAXKY O PROMYSHLENNY
Priority to FR7735920A priority Critical patent/FR2409975A1/en
Publication of FR2409975A1 publication Critical patent/FR2409975A1/en
Application granted granted Critical
Publication of FR2409975B1 publication Critical patent/FR2409975B1/fr
Granted 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
    • C07C45/84—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by azeotropic 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
    • C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
    • 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
    • C07C45/85—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification

Abstract

LA PRESENTE INVENTION SE RAPPORTE A L'INDUSTRIE PETROLEOCHIMIQUE ET, PLUS PRECISEMENT, A UN PROCEDE D'ISOLEMENT DU FORMALDEHYDE A PARTIR DE SES SOLUTIONS AQUEUSES. ON SOUMET UNE SOLUTION AQUEUSE DE FORMALDEHYDE A UNE EXTRACTION A L'ALCOOL AFIN D'OBTENIR UNE SOLUTION DE PRODUIT RAFFINE ET UNE SOLUTION D'EXTRAIT. ON ELIMINE ENSUITE L'EAU DE LA SOLUTION D'EXTRAIT PAR RECTIFICATION AZEOTROPIQUE A L'AIDE D'HYDROCARBURES EN C A C. ON ISOLE LE FORMALDEHYDE GAZEUX A PARTIR DE LA SOLUTION D'EXTRAIT SECHEE ET ON L'ABSORBE PAR DES ALCOOLS EN C A C. POUR SEPARER L'ALCOOL DE LA SOLUTION DE PRODUIT RAFFINE, ON SOUMET CETTE DERNIERE A UNE EXTRACTION PAR DES HYDROCARBURES EN C A C. L'INVENTION TROUVERA DES APPLICATIONS NOTAMMENT POUR LA CONCENTRATION DE SOLUTIONS AQUEUSES DILUEES DE FORMALDEHYDE QUI SE FORMENT DANS LA SYNTHESE DE DIMETHYL-4,4 DIOXANNE-1,3 A PARTIR DE L'ISOBUTYLENE ET DE FORMALDEHYDE.THE PRESENT INVENTION RELATES TO THE PETROLEOCHEMICAL INDUSTRY AND, MORE PRECISELY, TO A PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS. AN AQUEOUS FORMALDEHYDE SOLUTION IS SUBJECTED TO EXTRACTION WITH ALCOHOL TO OBTAIN A SOLUTION OF REFINED PRODUCT AND AN EXTRACT SOLUTION. THE WATER IS THEN REMOVED FROM THE EXTRACT SOLUTION BY AZEOTROPIC RECTIFICATION USING HYDROCARBONS IN CA C. THE GAS FORMALDEHYDE IS ISOLATED FROM THE DRIED EXTRACT SOLUTION AND IS ABSORBED BY ALCOHOLS IN CA C. TO SEPARATE THE ALCOHOL FROM THE SOLUTION OF REFINED PRODUCT, THIS LATTER IS SUBJECTED TO EXTRACTION BY HYDROCARBONS IN CA C. THE INVENTION WILL FIND APPLICATIONS IN PARTICULAR FOR THE CONCENTRATION OF AQUEOUS SOLUTIONS DILUTED WITH FORMALDEHYDE WHICH FORGED IN THE SYNTHESIS OF DIMETHYL-4,4 DIOXANNE-1,3 FROM ISOBUTYLENE AND FORMALDEHYDE.

FR7735920A 1977-11-29 1977-11-29 PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS Granted FR2409975A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7735920A FR2409975A1 (en) 1977-11-29 1977-11-29 PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7735920A FR2409975A1 (en) 1977-11-29 1977-11-29 PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS

Publications (2)

Publication Number Publication Date
FR2409975A1 true FR2409975A1 (en) 1979-06-22
FR2409975B1 FR2409975B1 (en) 1980-06-20

Family

ID=9198217

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7735920A Granted FR2409975A1 (en) 1977-11-29 1977-11-29 PROCESS FOR ISOLATING FORMALDEHYDE FROM ITS AQUEOUS SOLUTIONS

Country Status (1)

Country Link
FR (1) FR2409975A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064387A1 (en) * 1998-06-05 1999-12-16 Ineos Acrylics Uk Limited Dewatering process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999064387A1 (en) * 1998-06-05 1999-12-16 Ineos Acrylics Uk Limited Dewatering process
US6478929B1 (en) 1998-06-05 2002-11-12 Lucite International Uk Limited Dewatering process
US7338579B2 (en) 1998-06-05 2008-03-04 Lucite International Uk Limited Dewatering process

Also Published As

Publication number Publication date
FR2409975B1 (en) 1980-06-20

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Legal Events

Date Code Title Description
ST Notification of lapse