GB1160030A - Process and Installation for the Manufacture of Urea - Google Patents

Process and Installation for the Manufacture of Urea

Info

Publication number
GB1160030A
GB1160030A GB18051/67A GB1805167A GB1160030A GB 1160030 A GB1160030 A GB 1160030A GB 18051/67 A GB18051/67 A GB 18051/67A GB 1805167 A GB1805167 A GB 1805167A GB 1160030 A GB1160030 A GB 1160030A
Authority
GB
United Kingdom
Prior art keywords
urea
zone
solution
dissolved
formation
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
GB18051/67A
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 GB1160030A publication Critical patent/GB1160030A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Abstract

1,160,030. Synthesis of urea. STAMICARBON N.V. 19 April, 1967 [22 April, 1966], No. 18051/67. Heading C2C. Urea is obtained by reacting NH 3 and CO 2 under elevated temperature and pressure to form an ammonium carbamate melt which is subsequently transferred to a urea formation zone and transformed therein into a urea solution which contains ammonium carbamate and/or dissolved NH 3 and CO 2 , stripping the said urea solution with VH 3 and/or CO 2 and recycling the stripped NH 3 and CO 2 to the ammonium carbamate formation-zone or to the urea formation-zone, after which the resulting urea solution is optionally expanded to effect further removal of dissolved NH 3 and CO 2 which are thereafter absorbed in water and the solution so obtained is recycled to the carbamate or urea formation zone, and the urea solution freed of dissolved NH 3 and CO 2 is removed for further processing, wherein in the said process the feed of one or both of the reaction components NH 3 and CO 2 to the carbamate formation zone is controlled so that the NH 3 : CO 2 molar ratio of the NH3 and CO 2 present in the liquid phase as such or as NH 3 and CO 2 bonded otherwise than in the form of urea or biuret, is maintained at a value of from 2:1 to 3:1, and the said ratio in the urea formation zone is maintained at a value of from 3:1 to 6:1. The said molar NH 3 : CO 2 ratios in the liquid phases may be adjusted by controlling the molar NH 3 : CO 2 ratio in one or both of the gas phase(s) that are in contact with the liquid phase(s) such that the said gas phase molar ratio is maintained within the range 1:1 to 6:1. A suitable form of apparatus for carrying out the process is described.
GB18051/67A 1966-04-22 1967-04-19 Process and Installation for the Manufacture of Urea Expired GB1160030A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL666605483A NL148878B (en) 1966-04-22 1966-04-22 PROCEDURE FOR THE CONTINUOUS PREPARATION OF UREA.

Publications (1)

Publication Number Publication Date
GB1160030A true GB1160030A (en) 1969-07-30

Family

ID=19796380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18051/67A Expired GB1160030A (en) 1966-04-22 1967-04-19 Process and Installation for the Manufacture of Urea

Country Status (15)

Country Link
JP (1) JPS4925253B1 (en)
AT (1) AT273152B (en)
BE (1) BE697348A (en)
CH (1) CH487854A (en)
CS (1) CS157019B2 (en)
DE (1) DE1643065B2 (en)
DK (1) DK116865B (en)
ES (1) ES339600A1 (en)
FI (1) FI46064C (en)
GB (1) GB1160030A (en)
GR (1) GR36579B (en)
IL (1) IL27801A (en)
NL (1) NL148878B (en)
NO (1) NO123524B (en)
OA (1) OA02416A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143583A1 (en) * 1970-09-03 1972-04-20 Snam Progetti S.P.A., Mailand (Italien) Integrated process for the production of urea

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531967U (en) * 1976-06-24 1978-01-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2143583A1 (en) * 1970-09-03 1972-04-20 Snam Progetti S.P.A., Mailand (Italien) Integrated process for the production of urea

Also Published As

Publication number Publication date
FI46064C (en) 1972-12-11
FI46064B (en) 1972-08-31
DK116865B (en) 1970-02-23
JPS4925253B1 (en) 1974-06-28
BE697348A (en) 1967-10-02
GR36579B (en) 1969-02-21
NL148878B (en) 1976-03-15
OA02416A (en) 1970-05-05
CS157019B2 (en) 1974-08-23
ES339600A1 (en) 1968-07-16
AT273152B (en) 1969-08-11
DE1643065A1 (en) 1971-04-15
DE1643065B2 (en) 1976-01-02
NL6605483A (en) 1967-10-23
NO123524B (en) 1971-12-06
CH487854A (en) 1970-03-31
IL27801A (en) 1970-08-19

Similar Documents

Publication Publication Date Title
ES469448A1 (en) Process for the synthesis of urea
GB1185944A (en) Process for the Synthesis of Urea
GB1520561A (en) Flexible integrated method for the production of ammonila and urea
DE69200785D1 (en) Process for the production of urea with high energy yield.
GB1207923A (en) Process for urea production in combination with ammonia synthesis
GB1160030A (en) Process and Installation for the Manufacture of Urea
GB1416365A (en) Process for the manufacture of drystalline ammonium phosphates
GB1247951A (en) Process for preparing melamine from urea
IE35308B1 (en) Process for the production of urea
GB1259976A (en) Urea synthesis process
GB1188051A (en) Process for Producing Urea
GB1147734A (en) Method for the preparation of urea
JPS5653644A (en) Urea synthesis
IE33879L (en) Production of urea
IE32209B1 (en) Process for the production of urea having a low carbamate content
KR850000700B1 (en) Urea production method
GB1309275A (en) Synthesis of urea from melamine synthesis waste gas
US3211788A (en) Biuret control in urea process
GB1131906A (en) Method of synthesizing urea
JPS5239626A (en) Separation and recovery process of unreacted material on urea synthesi s
GB1283280A (en) Recycle process for the preparation and processing of a hydroxylammonium salt solution in a cyclohexanone oxime synthesis
GB1103351A (en) Method of preparing urea
GB1177096A (en) Nitrogenous Fertilizers and process for preparing same
GB1222678A (en) Process for purifying melamine
IE32163B1 (en) Process for the production of urea

Legal Events

Date Code Title Description
PS Patent sealed
PE Patent expired