SU1774623A1 - Method for production of carbamide - Google Patents

Method for production of carbamide

Info

Publication number
SU1774623A1
SU1774623A1 SU4852195/04A SU4852195A SU1774623A1 SU 1774623 A1 SU1774623 A1 SU 1774623A1 SU 4852195/04 A SU4852195/04 A SU 4852195/04A SU 4852195 A SU4852195 A SU 4852195A SU 1774623 A1 SU1774623 A1 SU 1774623A1
Authority
SU
USSR - Soviet Union
Prior art keywords
zone
synthesis
carbamide
ammonia
fed
Prior art date
Application number
SU4852195/04A
Other languages
Russian (ru)
Inventor
А.И. Гусев
В.И. Кучерявый
В.А. Бордуков
В.В. Потапов
Ю.А. Сергеев
Original Assignee
Государственный научно-исследовательский и проектный институт карбамида и продуктов органического синтеза с опытным заводом
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 Государственный научно-исследовательский и проектный институт карбамида и продуктов органического синтеза с опытным заводом filed Critical Государственный научно-исследовательский и проектный институт карбамида и продуктов органического синтеза с опытным заводом
Priority to SU4852195/04A priority Critical patent/SU1774623A1/en
Application granted granted Critical
Publication of SU1774623A1 publication Critical patent/SU1774623A1/en

Links

Classifications

    • 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

  • Fertilizers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

FIELD: production of carbamide and fertilizer. SUBSTANCE: carbamide is prepared by interaction of carbon dioxide with ammonia (excess of ammonia is 3.6-4.0 moles). The process is carried out at elevated temperature and pressure. Melt which is removed of reaction zone is separated into liquid product and gaseous mixture of unreacted components. This process takes place in steaming zone at pressure of synthesis. Thus separated gas stream is fed into additional reaction zone and fresh portions of carbon dioxide and ammonia are also fed into said zone. Reaction is carried out in adiabatic regime at temperature being equal to those in synthesis zone. Then diluted aqueous solution of carbon ammonium salts is added into thus obtained gaseous products. Thus obtained mixture is fed for condensation and absorption of ammonium carbamate, saturated adsorbent being separated and removed into zone of synthesis. Solution of carbamide being partially steamed in steaming zone is then concentrated. Said concentration is carried out consequently at distillation stage and during evaporation of water in vacuum. Thus concentrated desired product together with aqueous solution of carbon ammonium salts is prepared. The latter component is recycled during synthesis as adsorbent. EFFECT: decreases energy expenses. 2 dwg
SU4852195/04A 1990-07-16 1990-07-16 Method for production of carbamide SU1774623A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU4852195/04A SU1774623A1 (en) 1990-07-16 1990-07-16 Method for production of carbamide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU4852195/04A SU1774623A1 (en) 1990-07-16 1990-07-16 Method for production of carbamide

Publications (1)

Publication Number Publication Date
SU1774623A1 true SU1774623A1 (en) 1996-05-20

Family

ID=60520175

Family Applications (1)

Application Number Title Priority Date Filing Date
SU4852195/04A SU1774623A1 (en) 1990-07-16 1990-07-16 Method for production of carbamide

Country Status (1)

Country Link
SU (1) SU1774623A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2721699C2 (en) * 2015-12-11 2020-05-21 Касале Са Method for production of urea with high-temperature stripping

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2721699C2 (en) * 2015-12-11 2020-05-21 Касале Са Method for production of urea with high-temperature stripping
US10781167B2 (en) 2015-12-11 2020-09-22 Casale Sa Urea process with high-temperature stripping

Similar Documents

Publication Publication Date Title
EG16600A (en) Process for the preparation of urea
GB1505445A (en) Synthesis of urea
SU833158A3 (en) Method of urea and ammonia synthesis
KR830007529A (en) Element Synthesis Method
GB1365707A (en) Process for preparing urea
ES2000389A6 (en) Process for the preparation of urea.
ES2000605A6 (en) Process for the preparation of urea.
BG96104A (en) METHOD FOR THE PRODUCTION OF UREA WITH A HIGH ENERGY COEFFICIENT OF BENEFICIAL ACTION
RO79649A (en) PROCESS FOR THE PREPARATION OF MELAMINE
SU1774623A1 (en) Method for production of carbamide
ES426480A1 (en) Process for preparing urea from ammonia and carbon dioxide
IE35308B1 (en) Process for the production of urea
ES443998A1 (en) Treatment of water vapor generated in concentrating an aqueous urea solution
GB1147734A (en) Method for the preparation of urea
GB1031528A (en) Method for producing urea starting from carbon dioxide and ammonia
KR20020073571A (en) Process for preparing melamine from urea
GB1465511A (en) Continuous production of phthalimide
SU555092A1 (en) Method for simultaneous production of urea, ammonium salts or mixtures thereof
RU1829339C (en) Method for production of carbamide
GB838757A (en) Improvements in or relating to the preparation of urea
RO84765B (en) Process for preparing a concentrated carbamide solution
RU2069657C1 (en) Method of producing urea
GB753386A (en) Improvements in or relating to separation process of ammonia from synthesized urea liquid
GB1104710A (en) Process for making ammonia and urea
GB756934A (en) Process for the production of urea and ammonium carbamate