FR2411850A1 - Procede de production continue de solutions aqueuses d'uree et de formaldehyde - Google Patents

Procede de production continue de solutions aqueuses d'uree et de formaldehyde

Info

Publication number
FR2411850A1
FR2411850A1 FR7738287A FR7738287A FR2411850A1 FR 2411850 A1 FR2411850 A1 FR 2411850A1 FR 7738287 A FR7738287 A FR 7738287A FR 7738287 A FR7738287 A FR 7738287A FR 2411850 A1 FR2411850 A1 FR 2411850A1
Authority
FR
France
Prior art keywords
urea
formaldehyde
column
soln
continuously
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
FR7738287A
Other languages
English (en)
Other versions
FR2411850B1 (fr
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.)
Reichhold Chemicals Inc
Original Assignee
Reichhold Chemicals Inc
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 Reichhold Chemicals Inc filed Critical Reichhold Chemicals Inc
Priority to FR7738287A priority Critical patent/FR2411850A1/fr
Publication of FR2411850A1 publication Critical patent/FR2411850A1/fr
Application granted granted Critical
Publication of FR2411850B1 publication Critical patent/FR2411850B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
    • C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08G12/10—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with acyclic compounds having the moiety X=C(—N<)2 in which X is O, S or —N
    • C08G12/12—Ureas; Thioureas

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

L'INVENTION CONCERNE UN PROCEDE DE PRODUCTION CONTINUE DE SOLUTIONS AQUEUSES D'UREE ET DE FORMALDEHYDE. LEDIT PROCEDE UTILISE UNE SEULE COLONNE D'ABSORPTION A PLUSIEURS PLATEAUX DANS LAQUELLE LE PRODUIT GAZEUX D'UN CONVERTISSEUR DE FORMALDEHYDE PASSE A CONTRE-COURANT PAR RAPPORT A UNE SOLUTION AQUEUSE D'UREE. LA COLONNE EST MAINTENUE A UNE TEMPERATURE COMPRISE ENTRE 40 ET 80C ET UNE BASE AQUEUSE DILUEE EST AJOUTEE EN PLUSIEURS POINTS LE LONG DE LADITE COLONNE. LE FORMALDEHYDE SE COMBINE AVEC L'UREE DE LA SOLUTION POUR FORMER LE PRODUIT FINAL. UNE PARTIE DE CE DERNIER EST RECYCLEE DANS LA PARTIE INFERIEURE DE LA COLONNE. APPLICATION A LA PRODUCTION DE SOLUTIONS AQUEUSES D'UREE ET DE FORMALDEHYDE.
FR7738287A 1977-12-19 1977-12-19 Procede de production continue de solutions aqueuses d'uree et de formaldehyde Granted FR2411850A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7738287A FR2411850A1 (fr) 1977-12-19 1977-12-19 Procede de production continue de solutions aqueuses d'uree et de formaldehyde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7738287A FR2411850A1 (fr) 1977-12-19 1977-12-19 Procede de production continue de solutions aqueuses d'uree et de formaldehyde

Publications (2)

Publication Number Publication Date
FR2411850A1 true FR2411850A1 (fr) 1979-07-13
FR2411850B1 FR2411850B1 (fr) 1983-04-29

Family

ID=9199029

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738287A Granted FR2411850A1 (fr) 1977-12-19 1977-12-19 Procede de production continue de solutions aqueuses d'uree et de formaldehyde

Country Status (1)

Country Link
FR (1) FR2411850A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB838097A (en) * 1955-06-30 1960-06-22 Borden Co Process for preparing formaldehyde in stable form
DE1232130B (de) * 1959-10-17 1967-01-12 Borden Co Kontinuierliches Verfahren zur Herstellung stabiler Methylolharnstoff- bzw. Methylolmelaminloesungen
FR1574724A (fr) * 1967-05-05 1969-07-18
DE1643924A1 (de) * 1968-02-02 1971-07-15 Degussa Absorption von Formaldehyd
FR2289537A1 (fr) * 1974-11-02 1976-05-28 Basf Ag Procede de preparation de solutions aqueuses concentrees de formaldehyde et d'uree

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB838097A (en) * 1955-06-30 1960-06-22 Borden Co Process for preparing formaldehyde in stable form
DE1232130B (de) * 1959-10-17 1967-01-12 Borden Co Kontinuierliches Verfahren zur Herstellung stabiler Methylolharnstoff- bzw. Methylolmelaminloesungen
FR1574724A (fr) * 1967-05-05 1969-07-18
DE1643924A1 (de) * 1968-02-02 1971-07-15 Degussa Absorption von Formaldehyd
FR2289537A1 (fr) * 1974-11-02 1976-05-28 Basf Ag Procede de preparation de solutions aqueuses concentrees de formaldehyde et d'uree

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Also Published As

Publication number Publication date
FR2411850B1 (fr) 1983-04-29

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse