GB1304718A - - Google Patents

Info

Publication number
GB1304718A
GB1304718A GB2351770A GB2351770A GB1304718A GB 1304718 A GB1304718 A GB 1304718A GB 2351770 A GB2351770 A GB 2351770A GB 2351770 A GB2351770 A GB 2351770A GB 1304718 A GB1304718 A GB 1304718A
Authority
GB
United Kingdom
Prior art keywords
formaldehyde
urea
ammonia
condensed
paraformaldehyde
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
GB2351770A
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 filed Critical
Publication of GB1304718A publication Critical patent/GB1304718A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/02—Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
    • C07G99/00—Subject matter not provided for in other groups of this subclass

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

1304718 Urea-formaldehyde condensates VERENIGDE KUNSTMESTFABRIEKEN MEKOG ALBATROS NV 14 May 1970 [16 May 1969] 23517/70 Heading C2C [Also in Divisions C1 and C3] A urea-formaldehyde condensate suitable for use as a fertilizer is prepared by forming a liquid containing urea, formaldehyde and ammonia, entirely or in part condensed with each other, and 3-8 wt. per cent of water, wherein the molar ratio of urea : formaldehyde overall is 2:1 to 1:1, and 5-70% of the formaldehyde is condensed with ammonia as hexamethylene tetramine and any formaldehyde not in condensed form is present as paraformaldehyde, and acidifying the liquid. The mixture may be granulated during the hardening following acidification. In examples, powdered urea and paraformaldehyde are mixed in 5:3 or 5:4 molar ratio and 2À3-4À4 wt. per cent of dry gaseous ammonia is introduced. The resultant liquids are acidified with concentrated H 3 PO 4 or HNO 3 and granulated.
GB2351770A 1969-05-16 1970-05-14 Expired GB1304718A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6907509A NL6907509A (en) 1969-05-16 1969-05-16

Publications (1)

Publication Number Publication Date
GB1304718A true GB1304718A (en) 1973-01-31

Family

ID=19806962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2351770A Expired GB1304718A (en) 1969-05-16 1970-05-14

Country Status (4)

Country Link
BE (1) BE750394A (en)
FR (1) FR2047754A5 (en)
GB (1) GB1304718A (en)
NL (1) NL6907509A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071488A1 (en) * 1999-05-21 2000-11-30 AGRA Dünger GmbH Method for producing a urea-formaldehyde fertilizer
CN114685191A (en) * 2022-06-02 2022-07-01 中北大学 High-temperature heterogeneous polycondensation simplified preparation process of urea formaldehyde slow release fertilizer and application method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1152197B (en) * 1982-05-27 1986-12-31 Montedison Spa PROCEDURE FOR THE PREPARATION OF SLOWLY NITROGEN FERTILIZERS
DE3539631C2 (en) * 1985-11-08 1997-07-31 Basf Ag Process for the preparation of oligomethylene urea mixtures
US5266097A (en) * 1992-12-31 1993-11-30 The Vigoro Corporation Aminoureaformaldehyde fertilizer method and composition
IT1301970B1 (en) * 1998-07-30 2000-07-20 Sadepan Chimica S A S Di Savio PROCEDURE FOR THE FORMULATION OF A STABILIZED NITROGEN FERTILIZER IN LIQUID FORM FOR A NITROGEN RELEASE PROTRACTED OVER TIME.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071488A1 (en) * 1999-05-21 2000-11-30 AGRA Dünger GmbH Method for producing a urea-formaldehyde fertilizer
CN114685191A (en) * 2022-06-02 2022-07-01 中北大学 High-temperature heterogeneous polycondensation simplified preparation process of urea formaldehyde slow release fertilizer and application method thereof

Also Published As

Publication number Publication date
BE750394A (en) 1970-11-16
NL6907509A (en) 1970-11-18
FR2047754A5 (en) 1971-03-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee