GB1333544A - Method for processing at elevated temperature solutions containi ng ammonium carbamate - Google Patents

Method for processing at elevated temperature solutions containi ng ammonium carbamate

Info

Publication number
GB1333544A
GB1333544A GB615572A GB615572A GB1333544A GB 1333544 A GB1333544 A GB 1333544A GB 615572 A GB615572 A GB 615572A GB 615572 A GB615572 A GB 615572A GB 1333544 A GB1333544 A GB 1333544A
Authority
GB
United Kingdom
Prior art keywords
processing
elevated temperature
ammonium carbamate
containi
weight
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
GB615572A
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB1333544A publication Critical patent/GB1333544A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • 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
    • C07C273/04—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 from carbon dioxide and ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/025—Apparatus characterised by their chemically-resistant properties characterised by the construction materials of the reactor vessel proper
    • B01J2219/0277—Metal based
    • B01J2219/0286—Steel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Catalysts (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

1333544 Urea; melamine STAMIOARBON NV 9 Feb 1972 [13 Feb 1971] 6155/72 Heading C2C In the synthesis of urea or melamine, the processing of the intermediate ammonium carbamate solution at elevated temperature is conducted in plant wherein at least the surfaces thereof which are in contact with the solution are made of a nickel-free ferritic steel consisting essentially of at least 25% by weight of chromium, from 0 to 3% by weight of molybdenum, and having a combined content of carbon plus nitrogen of not more than 0À035% by weight and the balance of iron.
GB615572A 1971-02-13 1972-02-09 Method for processing at elevated temperature solutions containi ng ammonium carbamate Expired GB1333544A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NLAANVRAGE7101951,A NL169588C (en) 1971-02-13 1971-02-13 PROCESS FOR THE SOLUTIONS CONTAINING INCREASED AMMONIUM CARBAMATE

Publications (1)

Publication Number Publication Date
GB1333544A true GB1333544A (en) 1973-10-10

Family

ID=19812478

Family Applications (1)

Application Number Title Priority Date Filing Date
GB615572A Expired GB1333544A (en) 1971-02-13 1972-02-09 Method for processing at elevated temperature solutions containi ng ammonium carbamate

Country Status (20)

Country Link
AU (1) AU463665B2 (en)
BE (1) BE779258A (en)
BR (1) BR7200837D0 (en)
CA (1) CA966638A (en)
CS (1) CS163267B2 (en)
DD (1) DD95368A5 (en)
DE (1) DE2206615B2 (en)
ES (1) ES399672A1 (en)
FR (1) FR2125445B1 (en)
GB (1) GB1333544A (en)
HU (1) HU173919B (en)
IE (1) IE36076B1 (en)
IT (1) IT948491B (en)
NL (1) NL169588C (en)
NO (1) NO137010C (en)
RO (1) RO63301A (en)
SE (1) SE387336B (en)
TR (1) TR18774A (en)
ZA (1) ZA72781B (en)
ZM (1) ZM2772A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591644A (en) * 1983-12-21 1986-05-27 Stamicarbon B.V. Method and installation for the preparation of melamine
EP1921043A1 (en) * 2006-11-01 2008-05-14 Mitsubishi Gas Chemical Company, Inc. Method of recovering ammonia
US20220251032A1 (en) * 2019-07-05 2022-08-11 Stamicarbon B.V. Ferritic steel parts in urea plants

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63121641A (en) * 1986-11-10 1988-05-25 Nippon Yakin Kogyo Co Ltd External coating of sheathed heater made of austenitic stainless steel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1986973A (en) * 1930-11-17 1935-01-08 Du Pont Prevention of corrosion in urea synthesis
US2129689A (en) * 1936-12-04 1938-09-13 Du Pont Urea manufacture
US2183715A (en) * 1938-05-21 1939-12-19 Electro Metallurg Co Corrosion resistant steel alloy
US2624671A (en) * 1951-01-19 1953-01-06 Union Carbide & Carbon Corp Ferritic chromium steels
DE1608201A1 (en) * 1967-03-15 1970-12-03 Du Pont Corrosion-resistant iron-chromium alloys

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591644A (en) * 1983-12-21 1986-05-27 Stamicarbon B.V. Method and installation for the preparation of melamine
EP1921043A1 (en) * 2006-11-01 2008-05-14 Mitsubishi Gas Chemical Company, Inc. Method of recovering ammonia
US7785556B2 (en) 2006-11-01 2010-08-31 Mitsubishi Gas Chemical Company, Inc. Method of recovering ammonia
US20220251032A1 (en) * 2019-07-05 2022-08-11 Stamicarbon B.V. Ferritic steel parts in urea plants
US11746084B2 (en) * 2019-07-05 2023-09-05 Stamicarbon B.V. Ferritic steel parts in urea plants

Also Published As

Publication number Publication date
DD95368A5 (en) 1973-02-05
AU463665B2 (en) 1975-07-31
DE2206615B2 (en) 1980-05-29
BE779258A (en) 1972-08-11
DE2206615A1 (en) 1972-08-31
NO137010C (en) 1977-12-14
IE36076L (en) 1972-08-13
FR2125445B1 (en) 1977-07-15
NO137010B (en) 1977-09-05
NL169588B (en) 1982-03-01
CS163267B2 (en) 1975-08-29
HU173919B (en) 1979-09-28
IE36076B1 (en) 1976-08-04
IT948491B (en) 1973-05-30
ES399672A1 (en) 1976-05-01
AU3881372A (en) 1973-08-16
TR18774A (en) 1977-08-23
ZM2772A1 (en) 1973-02-21
RO63301A (en) 1978-07-15
NL169588C (en) 1982-08-02
NL7101951A (en) 1972-08-15
ZA72781B (en) 1972-10-25
BR7200837D0 (en) 1973-06-21
SE387336B (en) 1976-09-06
CA966638A (en) 1975-04-29
FR2125445A1 (en) 1972-09-29

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee