RU97112395A - METHOD FOR CLEANING MELAMINE - Google Patents

METHOD FOR CLEANING MELAMINE

Info

Publication number
RU97112395A
RU97112395A RU97112395/04A RU97112395A RU97112395A RU 97112395 A RU97112395 A RU 97112395A RU 97112395/04 A RU97112395/04 A RU 97112395/04A RU 97112395 A RU97112395 A RU 97112395A RU 97112395 A RU97112395 A RU 97112395A
Authority
RU
Russia
Prior art keywords
melamine
ammonia
pressure
melting point
bar
Prior art date
Application number
RU97112395/04A
Other languages
Russian (ru)
Other versions
RU2161610C2 (en
Inventor
Фингрхут Хельмут
Канци Лоренцо
Коуфаль Герхард
Джакомуццо Сильвано
Мюлльнер Мартин
Original Assignee
Агролинц Меламин Гмбх
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
Priority claimed from AT0239394A external-priority patent/AT402295B/en
Application filed by Агролинц Меламин Гмбх filed Critical Агролинц Меламин Гмбх
Publication of RU97112395A publication Critical patent/RU97112395A/en
Application granted granted Critical
Publication of RU2161610C2 publication Critical patent/RU2161610C2/en

Links

Claims (5)

1. Способ очистки меламина, отличающийся тем, что загрязненный меламин нагревают до температуры, которая выше 200oC и ниже точки плавления меламина и зависит от используемого давления аммиака, и поддерживают при давлении аммиака от 5 до 350 бар в течение от 1 мин до 20 час в этом температурном интервале, причем меламин находится в виде твердого вещества, после чего в любой последовательности декомпримируют и охлаждают до комнатной температуры и получают чистый меламин в порошкообразной форме.1. The method of purification of melamine, characterized in that the contaminated melamine is heated to a temperature that is above 200 o C and below the melting point of melamine and depends on the ammonia pressure used, and is maintained at an ammonia pressure of 5 to 350 bar for 1 minute to 20 an hour in this temperature range, wherein the melamine is in the form of a solid, after which it is decompressed and cooled to room temperature in any sequence to obtain pure melamine in powder form. 2. Способ по п. 1, отличающийся тем, что твердый меламин выдерживают в температурном интервале между 240oС и точкой плавления меламина, зависящей от используемого давления аммиака.2. The method according to p. 1, characterized in that the solid melamine is kept in the temperature range between 240 o C and the melting point of melamine, depending on the pressure of ammonia. 3. Способ по п. 1, отличающийся тем, что давление аммиака составляет от 10 до 100 бар. 3. The method according to p. 1, characterized in that the pressure of ammonia is from 10 to 100 bar. 4. Способ по п. 1, отличающийся тем, что способ совмещают с процессом получения меламина. 4. The method according to p. 1, characterized in that the method is combined with the process of producing melamine. 5. Способ по п. 1, отличающийся тем, что способ совмещают с процессом высокого давления получения меламина из мочевины. 5. The method according to p. 1, characterized in that the method is combined with a high pressure process for producing melamine from urea.
RU97112395/04A 1994-12-23 1995-12-13 Melamine purification process RU2161610C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0239394A AT402295B (en) 1994-12-23 1994-12-23 METHOD FOR PURIFYING MELAMINE
ATA2393/94 1994-12-23

Publications (2)

Publication Number Publication Date
RU97112395A true RU97112395A (en) 1999-06-20
RU2161610C2 RU2161610C2 (en) 2001-01-10

Family

ID=3533533

Family Applications (1)

Application Number Title Priority Date Filing Date
RU97112395/04A RU2161610C2 (en) 1994-12-23 1995-12-13 Melamine purification process

Country Status (17)

Country Link
EP (1) EP0799213B1 (en)
JP (1) JPH10511369A (en)
KR (1) KR100374731B1 (en)
CN (1) CN1068315C (en)
AT (2) AT402295B (en)
BR (1) BR9510606A (en)
DE (1) DE59504292D1 (en)
DK (1) DK0799213T3 (en)
ES (1) ES2124034T3 (en)
HR (1) HRP950605B1 (en)
IL (1) IL116516A (en)
NZ (1) NZ298044A (en)
PL (1) PL187434B1 (en)
RO (1) RO115521B1 (en)
RU (1) RU2161610C2 (en)
TW (1) TW299324B (en)
WO (1) WO1996020183A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5514797A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Method for increasing purity of melamine
NL1003328C2 (en) * 1996-06-13 1997-12-17 Dsm Nv Process for preparing melamine.
NL1003709C2 (en) * 1996-07-30 1998-02-05 Dsm Nv Process for preparing melamine.
NL1006095C2 (en) * 1997-05-21 1998-11-25 Dsm Nv Preparation of melamine from urea via a high pressure process
KR100495262B1 (en) 1997-05-21 2005-06-14 코닌클리즈케 디에스엠 엔.브이. Method for preparing melamine
NL1006147C2 (en) * 1997-05-28 1998-12-01 Dsm Nv Pure melamine is formed from urea by spray cooling the melamine melt
ES2195338T3 (en) 1997-05-28 2003-12-01 Dsm Ip Assets Bv METHOD TO PREPARE MELAMINE.
NL1006191C2 (en) * 1997-06-02 1998-12-03 Dsm Nv Multi-crystalline melamine powder is prepared from urea
KR100569572B1 (en) * 1997-06-02 2006-04-10 디에스엠 아이피 어셋츠 비.브이. Crystalline melamine
NL1006192C2 (en) 1997-06-02 1998-12-03 Dsm Nv Melamine is prepared from urea in a high pressure process
JP2002502416A (en) * 1997-06-02 2002-01-22 ディーエスエム エヌ．ブイ． Melamine production method
US6355797B2 (en) 1998-01-30 2002-03-12 Agrolinz Melamin Gmbh Process for cooling melamine
NL1008571C2 (en) * 1998-03-12 1999-07-28 Dsm Nv Crystalline melamine.
CZ20012301A3 (en) 1998-12-23 2002-03-13 Agrolinz Melamin Gmbh Melamine purification process
WO2001007420A2 (en) * 1999-07-27 2001-02-01 Agrolinz Melamin Gmbh Method for producing solid melamine
RU2417992C2 (en) * 2009-07-20 2011-05-10 Открытое акционерное общество "Научно-исследовательский и проектный институт карбамида и продуктов органического синтеза" (ОАО "НИИК") Method of producing melamine and method of removing dissolved gases from aqueous solution of crude melamine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116294A (en) * 1963-12-31 Process- for preparing high-purity melamine from urea
GB1003277A (en) * 1963-07-10 1965-09-02 Nissan Chemical Ind Ltd Process and apparatus for the production and separation of melamine
DE2522233A1 (en) * 1975-05-20 1976-12-02 Bollmann L Kg Timber board stacking machine - is fitted with conveyor and supply fork equipped with timing and release controls

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