FR2409975A1 - Procede d'isolement du formaldehyde a partir de ses solutions aqueuses - Google Patents
Procede d'isolement du formaldehyde a partir de ses solutions aqueusesInfo
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7735920A FR2409975A1 (fr) | 1977-11-29 | 1977-11-29 | Procede d'isolement du formaldehyde a partir de ses solutions aqueuses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7735920A FR2409975A1 (fr) | 1977-11-29 | 1977-11-29 | Procede d'isolement du formaldehyde a partir de ses solutions aqueuses |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2409975A1 true FR2409975A1 (fr) | 1979-06-22 |
FR2409975B1 FR2409975B1 (fr) | 1980-06-20 |
Family
ID=9198217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7735920A Granted FR2409975A1 (fr) | 1977-11-29 | 1977-11-29 | Procede d'isolement du formaldehyde a partir de ses solutions aqueuses |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2409975A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999064387A1 (fr) * | 1998-06-05 | 1999-12-16 | Ineos Acrylics Uk Limited | Procede de deshydratation |
-
1977
- 1977-11-29 FR FR7735920A patent/FR2409975A1/fr active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999064387A1 (fr) * | 1998-06-05 | 1999-12-16 | Ineos Acrylics Uk Limited | Procede de deshydratation |
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 (fr) | 1980-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |