专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2015124409A1 COMBINED REACTOR FOR HIGH-PRESSURE SYNTHESIS OF MELAMINE 审中-公开
标题翻译：用于高压合成甲胺的组合反应器
公开(公告)号：WO2015124409A1
公开(公告)日：2015-08-27
申请号：PCT/EP2015/051950
申请日：2015-01-30
申请人： CASALE SA
发明人： RIZZI, Enrico
IPC分类号： B01J10/00 , B01J19/24 , B01J3/04 , B01J4/02 , C07D251/60
CPC分类号： C07D251/60 , B01J3/04 , B01J4/02 , B01J10/00 , B01J10/005 , B01J19/246 , B01J2219/00078 , B01J2219/00081 , B01J2219/24 , C07D251/62
摘要： A reactor and associated process for the high-pressure synthesis of melamine from urea, comprising a primary step of conversion of the urea into crude melamine inside a first chamber delimited by a shell inside a reactor body and a secondary step of stripping said crude melamine melt inside a second reaction chamber, which is coaxial with and situated outside said first chamber, inside the same reactor body.
摘要翻译：一种用于从尿素高压合成三聚氰胺的反应器和相关联的方法，包括在由反应器主体内的壳界定的第一室内将尿素转化成粗三聚氰胺的第一步骤和将所述粗三聚氰胺熔体在同一反应器主体内部的与第一室同轴并位于第二反应室外的第二反应室内。

2. 发明申请

WO2009080240A3 PROCESS FOR THE PREPARATION OF MELAMINE 审中-公开
标题翻译：制备MELAMINE的方法
公开(公告)号：WO2009080240A3
公开(公告)日：2009-09-11
申请号：PCT/EP2008010687
申请日：2008-12-16
申请人： DSM IP ASSETS BV , TJIOE TJAY TJIEN , GROOTHAERT MARIJKE HILDE LEEN , VAN DER SPOEL JAN
发明人： TJIOE TJAY TJIEN , GROOTHAERT MARIJKE HILDE LEEN , VAN DER SPOEL JAN
IPC分类号： C07D251/62 , B01J8/02
CPC分类号： C07D251/62
摘要： The invention relates to process for the preparation of melamine comprising at least the following steps: a. feeding ammonia and hydrogen cyanide, either separately or combined, to a first reactor that contains a catalyst that comprises at least one element selected from group 11 of the Periodic Table of the Elements and which reactor is maintained at a pressure of at least 0.2 MPa and a temperature of 300-500 °C, at a space velocity lying between 102 and 106 ml/(g.hr), whereby a gaseous mixture (a) is formed comprising at least melamine, b. optionally purifying mixture (a), producing a melamine containing mixture (b), c. separating at least a part of the formed melamine, thereby forming a mixture (c) and separated melamine.
摘要翻译：本发明涉及三聚氰胺的制备方法，该方法至少包括以下步骤：a。将氨和氰化氢单独或组合供给到含有包含至少一种选自元素周期表第11族的元素的催化剂的第一反应器，并且该反应器保持在至少0.2MPa的压力和温度为300-500℃，空间速度为102至106ml /（g·hr），由此形成至少包含三聚氰胺的气态混合物（a），b。任选地，纯化混合物（a），产生含三聚氰胺的混合物（b），c。分离形成的三聚氰胺的至少一部分，从而形成混合物（c）和分离的三聚氰胺。

3. 发明申请

WO2009080241A2 PROCESS FOR THE PREPARATION OF MELAMINE 审中-公开
标题翻译：制备MELAMINE的方法
公开(公告)号：WO2009080241A2
公开(公告)日：2009-07-02
申请号：PCT/EP2008010688
申请日：2008-12-16
申请人： DSM IP ASSETS BV , TJIOE TJAY TJIEN , GROOTHAERT MARIJKE HILDE LEEN , FELLAY CELINE
发明人： TJIOE TJAY TJIEN , GROOTHAERT MARIJKE HILDE LEEN , FELLAY CELINE
IPC分类号： C07D251/62 , B01J8/02
CPC分类号： C07D251/62
摘要： The present invention relates to a process for the preparation of melamine, which process comprises at least the following steps: i) feeding methane and ammonia to a pre- reactor which pre- reactor is maintained at a temperature between 700 and 1500 °C whereby a gaseous mixture (i) is formed comprising at least hydrogen cyanide, ii) optionally, purifying mixture (i) thereby forming a mixture (ii) that contains at least gaseous hydrogen cyanide, a. feeding hydrogen cyanide from mixture (i) or (ii) and ammonia, either separately or combined, to a reactor that contains a catalyst and which reactor is maintained at a temperature of 300-500°C, at a space velocity lying between 102 and 106 ml/(g.hr), whereby a gaseous mixture (a) is formed comprising at least melamine, b. optionally, purifying mixture (a) producing a melamine containing mixture (b), c. separating at least a part of the formed melamine thereby forming a mixture (c) and separated melamine.
摘要翻译：本发明涉及一种制备三聚氰胺的方法，该方法包括至少以下步骤：i）将甲烷和氨进料到预反应器中，将预反应器保持在700和1500℃之间，由此得到形成气态混合物（i），其至少包含氰化氢，ii）任选地，纯化混合物（i），从而形成至少含有氰化氢气体的混合物（ii）。将来自混合物（i）或（ii）的氰化氢和单独或组合的氨加入到含有催化剂的反应器中，并将该反应器保持在温度为300-500℃，空间速度为102至 106ml /（g.hr），由此形成至少包含三聚氰胺的气体混合物（a），b。任选地，纯化混合物（a）产生含三聚氰胺的混合物（b），c。分离形成的三聚氰胺的至少一部分，从而形成混合物（c）并分离出三聚氰胺。

4. 发明申请

WO2003045927A1 VERFAHREN ZUR HERSTELLUNG VON MELEMFREIEM MELAMIN UND QUENCHER 审中-公开
标题翻译：用于生产MELEMFREIEM三聚氰胺和淬灭剂
公开(公告)号：WO2003045927A1
公开(公告)日：2003-06-05
申请号：PCT/DE2002/004251
申请日：2002-11-14
申请人： AGROLINZ MELAMIN GMBH , SCHRÖDER, Frank , RUECH, Wolfgang , NEUMÜLLER, Christoph , KOGLGRUBER, Ferdinand , WAGNER, Hans, Christian
发明人： SCHRÖDER, Frank , RUECH, Wolfgang , NEUMÜLLER, Christoph , KOGLGRUBER, Ferdinand , WAGNER, Hans, Christian
IPC分类号： C07D251/62
CPC分类号： C07D251/62
摘要： Verfahren zur Herstellung von melemfreiem Melamin durch wässrige Aufarbeitung einer aus einem Hochdruckverfahren erhaltenen Melaminschmelze, bei welchem die Melaminschmelze nach Abtrennen der Offgase mit einer wässrigen alkalihältigen Lösung gequencht und dabei direkt in eine wässrige alkalische Melaminlösung überführt wird, aus welcher anschliessend das Melamin auskristallisiert wird. Dabei ist es möglich, Melamin mit einem Melamgehalt von
摘要翻译：一种用于通过水溶液后处理，三聚氰胺制备melemfreiem三聚氰胺过程熔体从高压方法，其中所述蜜胺熔体而获得，分离出水溶液含碱溶液淬灭废气之后，从而直接转换成含水碱性三聚氰胺溶液，从中然后三聚氰胺结晶。这是可能具有<1000ppm的一个蜜白胺含量和<50ppm的蜜勒胺含量，得到三聚氰胺。本发明还涉及一种猝灭剂。

5. 发明申请

WO2003022823A1 PROCESS FOR OBTAINING CRYSTALLINE MELAMINE FROM MELAMINE MELT 审中-公开
标题翻译：从熔体熔体中获得晶体烯烃的方法
公开(公告)号：WO2003022823A1
公开(公告)日：2003-03-20
申请号：PCT/EP2002/010015
申请日：2002-09-06
申请人： DSM N.V. , TJIOE, Tjay, Tjien , CLAASSEN, Johannes, Bernardus, Jacobus
发明人： TJIOE, Tjay, Tjien , CLAASSEN, Johannes, Bernardus, Jacobus
IPC分类号： C07D251/60
CPC分类号： C07D251/62 , C07D251/60
摘要： The invention relates to a process for obtaining crystalline melamine from a melamine melt, comprising: a) a cooling step, in which the melamine melt is given a pressure between 0.1 MPa and 20 MPa and a temperature below the melting point of melamine at the prevailing pressure, upon which solid melamine is formed; b) a pressure adjustment step, in which the pressure of the solid melamine is adjusted to a value between 0.1 and 5 MPa; c) a dissolving step, in which the solid melamine is contacted with an aqueous phase that has a pH between 6 and 13 and in which less than 5 wt.% ammonia is present, upon which a solution is formed; d) a crystallization step, in which the solution is cooled by at least 20 °C, upon which crystalline melamine is formed; e) a separation step, in which crystalline melamine is separated from the solution.
摘要翻译：本发明涉及一种从三聚氰胺熔体中获得结晶三聚氰胺的方法，包括：a）冷却步骤，其中三聚氰胺熔体的压力为0.1MPa至20MPa，温度低于三聚氰胺的熔点形成固体三聚氰胺的压力; b）压力调节步骤，其中将固体三聚氰胺的压力调节至0.1至5MPa的值; c）溶解步骤，其中固体三聚氰胺与pH在6和13之间并且其中存在少于5重量％的氨的水相接触，在其上形成溶液; d）结晶步骤，其中将溶液冷却至少20℃，在其上形成结晶三聚氰胺; e）分离步骤，其中结晶三聚氰胺与溶液分离。

6. 发明申请

WO02038498A1 METHOD FOR THE PURIFICATION OF MELAMINE-CONTAINING AMMONIA 审中-公开
标题翻译：程序对清洁三聚氰胺氨
公开(公告)号：WO02038498A1
公开(公告)日：2002-05-16
申请号：PCT/EP2001/012691
申请日：2001-11-02
IPC分类号： C01C1/02 , C07D251/60 , C07D251/62
CPC分类号： C01C1/024 , C07D251/60 , C07D251/62
摘要： The invention relates to a method for the purification of melamine-containing gaseous NH3, by means of partial condensation, whereby pure NH3 gas and liquid NH3 enriched with melamine are obtained.
摘要翻译：一种用于通过部分冷凝气态纯化NH 3含蜜胺的方法，得到纯的NH 3气体，并且获得三聚氰胺富集的液体NH 3。

7. 发明申请

WO01046159A2 HIGH YIELDS, HIGH PURITY MELAMINE MANUFACTURING PROCESS 审中-公开
标题翻译：制造高性能高性能三聚氰胺的方法
公开(公告)号：WO01046159A2
公开(公告)日：2001-06-28
申请号：PCT/IT2000/000508
申请日：2000-12-07
IPC分类号： C07D251/60 , C07D251/62 , C07D251/00
CPC分类号： C07D251/60 , C07D251/62
摘要： The process to recover both melamine and oxyaminotriazines (OAT) from the mother liquors of melamine crystallisation comprising the following steps: a) addition to a melamine and OAT containing aqueous solution at high temperature of an alkaline agent until the solution pH reach a value equal or higher than 11; b) most of melamine crystallisation by solution cooling; c) separation and recovery of precipitated melamine; d) acidification of the obtained solution, after precipitated melamine separation, in order to reach a pH of about 7; e) the suspension obtained in d) above after precipitated melamine recovery, is subject to filtration according to tangential filtration technique obtaining a clear permeate which contains as a solution all melamine which did not precipitate in step b) and a retentate comprising of OAT dispersion; f) OAT deprived mother liquors from e) are recycled to row melamine solution preparation step; in such a way almost the total amount of melamine, which did not precipitate in step b), is recovered; g) OAT are recovered from step e) retentate by using any conventional separation technics.
摘要翻译：本发明涉及一种从三聚氰胺结晶储备溶液中回收三聚氰胺和氧氨基三嗪（OAT）的方法，包括：a）在含有三聚氰胺和OAT的水溶液中加入高温的碱性试剂，直到溶液pH达到的值大于或等于11，b）通过冷却，c）分离并回收沉淀的结晶三聚氰胺三聚氰胺的较大部分，d）酸化三聚氰胺沉淀分离后所得到的溶液，以获得pH为约7，E）将沉淀的三聚氰胺的恢复后滤波在d中获得的悬浮液）根据切向过滤技术以获得以可溶形式包含的所有未在步骤b）中沉淀的三聚氰胺和包含OAT分散体的渗余物的澄清渗透物，f）至回收和回收未在步骤b）中沉淀的粗制三聚氰胺的OAT耗尽储备溶液。在步骤g）中，通过常规分离技术从步骤e）的渗余物中回收OAT。

8. 发明申请

WO0039107A8 METHOD FOR PURIFYING MELAMINE 审中-公开
标题翻译：清洁三聚氰胺的方法
公开(公告)号：WO0039107A8
公开(公告)日：2000-08-24
申请号：PCT/EP9910008
申请日：1999-12-16
申请人： AGROLINZ MELAMIN GMBH , COUFAL GERHARD
发明人： COUFAL GERHARD
IPC分类号： C07D251/62
CPC分类号： C07D251/62
摘要： The invention relates to a method for purifying melamine in which impure melamine is heated to a temperature range above 325 DEG C but lower than the melting point of melamine which depends on the prevailing ammonia pressure. In addition, the impure melamine is held in said temperature range under an ammonia pressure ranging from 1 to 150 bar for a duration lasting from 1 minute up to 20 hours. The melamine is provided in solid form. Afterwards, the melamine is relieved from pressure and cooled in any order.
摘要翻译：一种用于在其纯化蜜胺的方法的温度范围内，其是高于325℃和低于所述依赖于蜜胺的分别盛行氨压熔点，提出，并在1至150巴的氨压为一分钟内的不纯三聚氰胺在此温度范围20小时，三聚氰胺以固体形式存在。然后以任何顺序放松和冷却。

9. 发明申请

WO99054316A1 PROCESS FOR DRYING MELAMINE 审中-公开
标题翻译：干酪梅花的方法
公开(公告)号：WO99054316A1
公开(公告)日：1999-10-28
申请号：PCT/NL1999/000218
申请日：1999-04-15
IPC分类号： C07D251/62
CPC分类号： C07D251/62
摘要： This invention relates to a process for drying melamine wet cake to produce a dry melamine powder showing improved bulk properties, the drying being effected with a contact dryer. In paticular the invention relates to a process for drying melamine wet cake that contains predominantly melamine crystals that have crystallized from a melamine solution in a crystallizer, the drying being effected with a contact dryer. The invention also relates to the drying of a melamine wet cake whose percentage of fines having a diameter of
摘要翻译：本发明涉及一种干燥三聚氰胺湿滤饼以产生干燥三聚氰胺粉末的方法，其显示出改进的散装性能，干燥是用接触式干燥器进行的。在本发明中，本发明涉及一种用于干燥三聚氰胺湿滤饼的方法，其主要包含从结晶器中的三聚氰胺溶液中结晶的三聚氰胺晶体，干燥是用接触式干燥器进行的。本发明还涉及三聚氰胺湿饼的干燥，其直径<21μm的细粉百分比小于30重量％，干燥是用接触式干燥器进行的。

10. 发明申请

WO1997020826A1 PROCESS FOR PRODUCING PURE MELAMINE 审中-公开
标题翻译：用于生产纯三聚氰胺
公开(公告)号：WO1997020826A1
公开(公告)日：1997-06-12
申请号：PCT/EP1996005389
申请日：1996-12-04
申请人： AGROLINZ MELAMIN GMBH , CANZI, Lorenzo , COUFAL, Gerhard , MÜLLNER, Martin
发明人： AGROLINZ MELAMIN GMBH
IPC分类号： C07D251/60
CPC分类号： C07D251/60 , C07D251/62
摘要： The invention concerns a process for producing pure melamine in which liquid, ammonia-containing melamine is rapidly expanded from an ammonia partial pressure p1 of between 400 and 50 bar to an ammonia partial pressure p2 of between 200 bar and atmospheric pressure at a temperature which is between 0 and 60 DEG C above the fixed point of the melamine which is dependent on the prevailing ammonia partial pressure in each case, higher pressures permitting a greater margin of the temperature from the fixed point of the melamine than lower pressures, and p1 always being greater than p2. As a result thereof, pure melamine is deposited in solid form. Further expansion of the melamine to atmospheric pressure, if necessary, and cooling to room temperature are then carried out in any order and the pure melamine is isolated.
摘要翻译：一种用于生产，其中液体纯三聚氰胺的方法，ammoniakhältiges三聚氰胺是从0到60℃下高于依赖于蜜胺的特定通行氨分固定点的温度下，较高的压力，允许从固定点的三聚氰胺比温度的更大的距离较低的压力，从P1 400-50巴氨分压为200巴，并迅速大气压力之间的氨分压P2松懈下来，p1为总是比P2，由此纯的三聚氰胺沉积在固体形式时，任选地接着在大气压下以任何顺序进一步扩大冷却至室温，并纯三聚氰胺是分离的。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式