UA15830C2 - Process for the production of crystalline carbamide - Google Patents

Process for the production of crystalline carbamide

Info

Publication number
UA15830C2
UA15830C2 UA93007238A UA93007238A UA15830C2 UA 15830 C2 UA15830 C2 UA 15830C2 UA 93007238 A UA93007238 A UA 93007238A UA 93007238 A UA93007238 A UA 93007238A UA 15830 C2 UA15830 C2 UA 15830C2
Authority
UA
Ukraine
Prior art keywords
carbamide
production
elimination
crystals
crystalline
Prior art date
Application number
UA93007238A
Other languages
Russian (ru)
Ukrainian (uk)
Inventor
Михайло Якович Рахлін
Михаил Якович Рахлин
Вячеслав Євгенович Буковський
Вячеслав Евгеньевич Буковский
Микола Іванович Корчака
Николай Иванович Корчака
Роман Герасимович Гріцив
Роман Герасимович Грицив
Олександр Анатолійович Андрєєв
Александр Анатольевич Андреев
Original Assignee
Санкт-Пєтєрбургскій Государствєнний Унівєрсітєт
Санкт-Петербургский государственный университет
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 Санкт-Пєтєрбургскій Государствєнний Унівєрсітєт, Санкт-Петербургский государственный университет filed Critical Санкт-Пєтєрбургскій Государствєнний Унівєрсітєт
Publication of UA15830C2 publication Critical patent/UA15830C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof
    • 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
    • C07C273/14—Separation; Purification; Stabilisation; Use of additives
    • C07C273/16—Separation; Purification

Abstract

The invention relates to the production of mineral fertilizers, in particular to a process for the production of crystalline carbamide which provides for solution crystallization up to supersaturating temperature with simultaneous bubbling gas indifferent towards to carbamide followed by elimination of carbamide crystals. The crystallization is carried out in the bulk supersaturated solution, and the elimination of carbamide crystals is carried out by filtration.
UA93007238A 1992-12-09 1993-08-05 Process for the production of crystalline carbamide UA15830C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU9292008493A RU2041202C1 (en) 1992-12-09 1992-12-09 Process for preparing crystalline carbamide

Publications (1)

Publication Number Publication Date
UA15830C2 true UA15830C2 (en) 1997-06-30

Family

ID=20132656

Family Applications (1)

Application Number Title Priority Date Filing Date
UA93007238A UA15830C2 (en) 1992-12-09 1993-08-05 Process for the production of crystalline carbamide

Country Status (3)

Country Link
RU (1) RU2041202C1 (en)
UA (1) UA15830C2 (en)
WO (1) WO1994013630A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2472777C1 (en) * 2011-11-23 2013-01-20 Фарид Алекович Батуллин Method of producing high-purity crystalline carbamide
CN104888478B (en) * 2015-05-29 2017-01-11 浙江工业大学化工设备有限公司 Two-section evaporation separator
CN110575751A (en) * 2018-06-11 2019-12-17 河南车权健新能源科技有限公司 automobile urea reagent and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124612A (en) * 1964-03-10 Urea crystallization
SU113146A1 (en) * 1957-05-16 1957-11-30 А.А. Дьяченко Unit for sorting and stacking steel sheets
GB1148572A (en) * 1966-02-05 1969-04-16 Power Gas Ltd Process for the production of coarse crystals of urea

Also Published As

Publication number Publication date
RU2041202C1 (en) 1995-08-09
WO1994013630A1 (en) 1994-06-23

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