ES339600A1 - Process and Installation for the Manufacture of Urea - Google Patents

Process and Installation for the Manufacture of Urea

Info

Publication number
ES339600A1
ES339600A1 ES339600A ES339600A ES339600A1 ES 339600 A1 ES339600 A1 ES 339600A1 ES 339600 A ES339600 A ES 339600A ES 339600 A ES339600 A ES 339600A ES 339600 A1 ES339600 A1 ES 339600A1
Authority
ES
Spain
Prior art keywords
urea
zone
dissolved
maintained
solution
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
ES339600A
Other languages
Spanish (es)
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 ES339600A1 publication Critical patent/ES339600A1/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

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.
ES339600A 1966-04-22 1967-04-21 Process and Installation for the Manufacture of Urea Expired ES339600A1 (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
ES339600A1 true ES339600A1 (en) 1968-07-16

Family

ID=19796380

Family Applications (1)

Application Number Title Priority Date Filing Date
ES339600A Expired ES339600A1 (en) 1966-04-22 1967-04-21 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)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PH12569A (en) * 1970-09-03 1979-06-20 Snam Progetti Process for producing urea
JPS531967U (en) * 1976-06-24 1978-01-10

Also Published As

Publication number Publication date
JPS4925253B1 (en) 1974-06-28
IL27801A (en) 1970-08-19
CH487854A (en) 1970-03-31
DK116865B (en) 1970-02-23
OA02416A (en) 1970-05-05
NL148878B (en) 1976-03-15
FI46064C (en) 1972-12-11
FI46064B (en) 1972-08-31
GR36579B (en) 1969-02-21
BE697348A (en) 1967-10-02
CS157019B2 (en) 1974-08-23
DE1643065B2 (en) 1976-01-02
AT273152B (en) 1969-08-11
NO123524B (en) 1971-12-06
GB1160030A (en) 1969-07-30
NL6605483A (en) 1967-10-23
DE1643065A1 (en) 1971-04-15

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19870214