DE1239290C2 - Verfahren zur herstellung von bestaendigen konzentrierten waessrigen loesungen von formaldehyd, harnstoff und formaldehyd-harnstoff-kondensationsprodukten - Google Patents

Verfahren zur herstellung von bestaendigen konzentrierten waessrigen loesungen von formaldehyd, harnstoff und formaldehyd-harnstoff-kondensationsprodukten

Info

Publication number
DE1239290C2
DE1239290C2 DE1958M0039422 DEM0039422A DE1239290C2 DE 1239290 C2 DE1239290 C2 DE 1239290C2 DE 1958M0039422 DE1958M0039422 DE 1958M0039422 DE M0039422 A DEM0039422 A DE M0039422A DE 1239290 C2 DE1239290 C2 DE 1239290C2
Authority
DE
Germany
Prior art keywords
formaldehyde
urea
solution
hour
stage
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
DE1958M0039422
Other languages
German (de)
English (en)
Other versions
DE1239290B (de
Inventor
Guido; Luciani Luciano; Soldano Umberto; Mailand Greco (Italien)
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.)
Montedison SpA
Original Assignee
Montecatini Edison SpA
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 Montecatini Edison SpA filed Critical Montecatini Edison SpA
Publication of DE1239290B publication Critical patent/DE1239290B/de
Application granted granted Critical
Publication of DE1239290C2 publication Critical patent/DE1239290C2/de
Expired 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/025—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds of solutions of urea and formaldehyde
    • 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
    • C07C45/783—Separation; Purification; Stabilisation; Use of additives by gas-liquid treatment, e.g. by gas-liquid absorption
    • 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
    • C07C45/86—Use of additives, e.g. for stabilisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Treating Waste Gases (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
DE1958M0039422 1957-10-30 1958-10-28 Verfahren zur herstellung von bestaendigen konzentrierten waessrigen loesungen von formaldehyd, harnstoff und formaldehyd-harnstoff-kondensationsprodukten Expired DE1239290C2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1549957 1957-10-30

Publications (2)

Publication Number Publication Date
DE1239290B DE1239290B (de) 1967-04-27
DE1239290C2 true DE1239290C2 (de) 1976-07-01

Family

ID=11148056

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1958M0039422 Expired DE1239290C2 (de) 1957-10-30 1958-10-28 Verfahren zur herstellung von bestaendigen konzentrierten waessrigen loesungen von formaldehyd, harnstoff und formaldehyd-harnstoff-kondensationsprodukten

Country Status (6)

Country Link
US (1) US3067177A (enExample)
CH (1) CH398530A (enExample)
DE (1) DE1239290C2 (enExample)
ES (1) ES245221A1 (enExample)
GB (1) GB906120A (enExample)
NL (1) NL6703094A (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151960A (en) * 1962-06-08 1964-10-06 Stamicarbon Process for absorbing formaldehyde from a formaldehyde-containing gas
US3243939A (en) * 1962-07-17 1966-04-05 Stamicarbon Process for absorbing formaldehyde from gases containing the same
NL298226A (enExample) * 1963-09-23
US3862221A (en) * 1967-08-02 1975-01-21 Oreal N,N{40 -di(hydroxymethylcarbamyl)cystamine
IT951964B (it) * 1971-12-27 1973-07-10 Sir Soc Italiana Resine Spa Procedimento perfezionato per la preparazione di resine da urea e formaldeide
IT951962B (it) * 1971-12-27 1973-07-10 Sir Soc Italiana Resine Spa Procedimento per la preparazione di resine da urea e formaldeide
US4065421A (en) * 1976-03-17 1977-12-27 Reichhold Chemicals, Inc. Continuous process for the production of aqueous urea-formaldehyde solutions
ATE139463T1 (de) * 1992-08-07 1996-07-15 Hydro Agri Sluiskil Bv Verfahren zur herstellung von harnstoffgranulaten
JP3667418B2 (ja) 1996-02-01 2005-07-06 東洋エンジニアリング株式会社 粒状尿素の製造方法
GB2394956B (en) * 2002-10-18 2004-10-27 Basic Solutions Ltd A urea based granule blend for ice-melting and reducing granule caking
NL1023303C2 (nl) * 2003-04-29 2004-11-01 Dsm Nv Werkwijze voor de bereiding van een ureum- en formaldehydebevattende waterige oplossing.
NL1027314C2 (nl) * 2004-10-22 2006-04-25 Dsm Ip Assets Bv Werkwijze voor de produktie van een melamine en aldehyde bevattende waterige stroom.
AT516530B1 (de) 2014-11-20 2018-02-15 Johnson Matthey Plc Verfahren und Vorrichtung zur Herstellung einer wässrigen Lösung von Formaldehyd
CN113999358B (zh) * 2021-11-23 2024-02-06 绵阳市建诚化工有限公司 一种甲醛生产刨花板用脲醛预缩液的制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1507624A (en) * 1923-02-05 1924-09-09 Pollak Process for manufacturing condensation products
US1987601A (en) * 1932-05-26 1935-01-15 Du Pont Purification of alcohols
US2321544A (en) * 1940-05-22 1943-06-08 Du Pont Preparation of methylol urea
DE835300C (de) * 1942-01-24 1952-03-31 Glanzstoff Ag Verfahren zur Herstellung stabiler, auch nach kurzem Aufkochen noch bestaendiger, mineralsaurer Loesungen aus Formaldehyd und Harnstoff
GB641703A (en) * 1947-03-06 1950-08-16 Du Pont Manufacture of unpolymerized urea-formaldehyde reaction products
US2467212A (en) * 1947-03-06 1949-04-12 Du Pont Liquid urea-formaldehyde compositions
US2946403A (en) * 1958-08-13 1960-07-26 Borden Co Concentrated formaldehyde solution

Also Published As

Publication number Publication date
GB906120A (en) 1962-09-19
NL6703094A (enExample) 1967-05-25
ES245221A1 (es) 1959-05-01
CH398530A (de) 1966-03-15
US3067177A (en) 1962-12-04
DE1239290B (de) 1967-04-27

Similar Documents

Publication Publication Date Title
DE1239290C2 (de) Verfahren zur herstellung von bestaendigen konzentrierten waessrigen loesungen von formaldehyd, harnstoff und formaldehyd-harnstoff-kondensationsprodukten
DD202536A5 (de) Verfahren zur entfernung von harnstoff, ammoniak und kohlendioxid aus verduennten waessrigen loesungen
DE69605926T2 (de) Verfahren zur herstellung von oligomethylenharnstoff
DE3319345C2 (enExample)
DE1493198C3 (de) Verfahren zur Herstellung eines aliphatischen oder cycloaliphatischen Ketoxims
DE68906423T2 (de) Verfahren zur konzentrierung der salpetersaeure.
AT214452B (de) Verfahren zum Absorbieren von gasförmigem Formaldehyd zu konzentrierten Lösungen
DD233124A5 (de) Verfahren zur herstellung von harnstoff
DE1161022B (de) Verfahren zur kontinuierlichen Polymerisation von Formaldehyd
DE2435167C3 (de) Verfahren zur Gewinnung von Guanidincarbonat aus verdünnten, wäßrigen Lösungen
DE2113428A1 (de) Verfahren zur Umwandlung von Schwefeldioxyd in Schwefelsaeure
DE2046256A1 (de) Kontinuierliche Herstellung von Cyclohexanonoxim
DE641993C (de) Verfahren zur Herstellung von festem leichtloeslichem Formaldehyd
AT204054B (de) Verfahren zur Herstellung eines Harnstoff und Ammonsulfat enthaltenden Düngemittels
DE1302961B (de) Verwendung von Produkten, die durch Umsetzung von Zellstoffkocherablauge mit Ammoniak und Sauerstoff hergestellt worden sind, als Düngemittel
DE2404264C3 (de) Verfahren zum Vorreinigen von Phenol, Formaldehyd und deren Reaktionsprodukte enthaltendem Abwasser
DD228273A1 (de) Verfahren zur herstellung von harnstoff-formaldehyd-harz-leimen
DE3224107A1 (de) Verfahren zur herstellung waessriger melamin-formaldehyd-kondensate
DE2326804C3 (de) Verfahren zur Herstellung von Wasserstoffperoxid
DE1168882B (de) Verfahren zum Absorbieren von Formaldehyd aus formaldehydhaltigen Gasen
DE69011644T2 (de) Verfahren zur herstellung stabilisierter lösungen von formaldehyd mit methanol.
DE1643924A1 (de) Absorption von Formaldehyd
EP0017206A1 (de) Verfahren zur gleichzeitigen Herstellung von konzentrierten, wässrigen Formaldehyd/Harnstoff-Lösungen und Formaldehydlösungen
DE1956908A1 (de) Kreislaufprozess zu der Herstellung und Verarbeitung einer Hydroxylammoniumsalzloesung
EP0480448A1 (de) Leime auf der Basis von Harnstoff-Formaldehyd-Kondensationsprodukten der Formaldehyd-Emissionsklasse E-O sowie ihre Herstellung und Verwendung