CAS: 108-78-1; 1,3,5-Triazine-2,4,6-Triamine

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CAS号420-04-2 氰胺 | CAS号74-90-8 氢氰酸 | CAS号57-13-6 尿素 | CAS号593-85-1 碳酸胍 | CAS号34557-54-5 methane | CAS号67-71-0 二甲基砜 | CAS号56-18-8 3,3'-二氨基二丙胺 | CAS号87719-08-2 1,3,5-tribenzyl... | CAS号1333-74-0 氢 | CAS号37640-57-6 氰尿酸三聚氰胺 | CAS号5606-24-6 2,4-二氨基-6-丁氨基-1... | CAS号5606-17-7 2-amino-4,6-bis... | CAS号593-84-0 硫氰酸胍 | CAS号204-34-2 tri-s-triazine | CAS号20208-95-1 磷酸三聚氰胺 | CAS号1973-05-3 N2,N4,N6-三苯基-1,... | CAS号420-04-2 氰胺 | CAS号27114-96-1 2,4,6-tripyrrol... | CAS号10043-11-5 氮化硼

氢氰酸置于pd-Mgo 氨体系中,400.0 °C,5.0 Mpa 条件下,以0.32%的收率获得三聚氰胺
参考文献:Process For The Preparation Of Melamine
标题:Process For The Preparation Of Melamine
摘要:该发明涉及一种制备三聚氰胺的方法,该方法至少包括以下步骤:A. 将氨和氰化氢分别或结合地加入含有至少一种11族元素催化剂的第一反应器中,该反应器保持在至少2巴的压力和300-500oc的温度下,空间速度在102至106 Ml/(G.Hr)之间,从而形成至少包含三聚氰胺的气态混合物(A),B. 可选地纯化混合物(A)产生含有三聚氰胺的混合物(B),C. 分离至少部分形成的三聚氰胺,从而形成反应混合物(C)和分离的三聚氰胺.该发明还涉及一种制备三聚氰胺的方法,该方法至少包括以下步骤:I. 将甲烷和氨加入预反应器,该预反应器保持在700至1500oc的温度下,从而形成至少含有氰化氢的气态混合物(I),Ii. 纯化混合物(I)从而形成至少含有氰化氢的混合物(II),A. 从混合物(II)中将氰化氢和氨分别或结合地加入含有催化剂的第一反应器,该反应器保持在至少2巴的压力和300-500oc的温度下,空间速度在102至106 Ml/(G.Hr)之间,从而形成至少包含三聚氰胺的气态混合物(A),B. 可选地纯化混合物(A)产生含有三聚氰胺的混合物(B),C. 分离至少部分形成的三聚氰胺,从而形成反应混合物(C)和分离的三聚氰胺.该发明还涉及通过这些方法获得的三聚氰胺.

专利信息

专利号:WO-2025015696-A1
优先权日:2023-07-17
标题:β-CYC-ASSISTED SYNTHESIS OF IN-V GROUP QUANTUM DOT, AND SYNTHESIS METHOD THEREFOR AND USE THEREOF
发明人：LI GUOQIANG; LIANG JIEHUI; WANG JUNKUN; GUO JIANSEN; LIU PEIXIN
权利人:UNIV SOUTH CHINA TECH
摘要:Provided are β-cyc-assisted synthesis of an In-V group quantum dot, and a synthesis method therefor and the use thereof. The method for β-cyc-assisted synthesis of an In-V group quantum dot comprises: preparing a β-cyc-containing precursor solution of an In source and a V group element source, and subjecting it to a hydrothermal reaction; extracting a stock solution after the hydrothermal reaction by using an organic solvent; removing β-cyc from the stock solution, washing same with water and then extracting same; and heating and concentrating same to obtain a high-concentration In-V group quantum dot solution. With regard to the β-cyc-assisted synthesis of an In-V group quantum dot, the In-V group quantum dot synthesized with the assistance of β-cyc is prepared by using the method for β-cyc-assisted synthesis of an In-V group quantum dot. The use of β-cyc-assisted synthesis of an In-V group quantum dot is the use of the β-cyc-assisted synthesis of an In-V group quantum dot in the field of photovoltaics, and the field of photovoltaics comprises solar cells, photoelectrochemical hydrogen production and photoelectric detectors. Compared with traditional synthesis methods, this synthesis method has the advantages of green and environmentally friendly raw materials, a simple and safe process, a simple and convenient device, efficient and economic synthesis, and being low cost.

专利号:US-11643387-B2
优先权日:2019-07-18
标题 :Process for the synthesis of urea
发明人：MARRONE LEONARDO; BERTINI PAOLO
权利人:CASALE SA
摘要:A process for synthesis of urea from ammonia and carbon dioxide comprising the synthesis of urea in parallel in a first urea reactor ( 1 ) at a first urea synthesis pressure and in a second urea reactor ( 2 ) at a second and lower urea synthesis pressure; a stripping step of the reaction effluent of the first reactor, which is performed in a stripper ( 4 ) operating at a stripping pressure lower than the first urea synthesis pressure; the reaction effluent ( 21 ) of the second reactor ( 2 ) and the stripper liquid effluent ( 11 ) are sent to a recovery section ( 13 ) where a carbamate-containing recycle solution ( 17 ) is produced, and said recycle solution ( 17 ) is sent partly to said first reactor and partly to said second reactor.

专利号:US-9957239-B2
优先权日:2014-04-28
标题 :Process and plant for the synthesis of urea and melamine
发明人：BERTINI PAOLO; DI CARLO GABRIELE
权利人:CASALE SA
摘要:An integrated process for the synthesis of urea and melamine, wherein: urea is synthesized with a stripping process in a high-pressure synthesis loop comprising a reactor, a stripper and a carbamate condenser, and the urea solution leaving said stripper is sent to a recovery section to produce a concentrated urea product and a recovered carbamate solution; at least part of said urea product is converted to melamine, and the off-gas from the synthesis of melamine are recycled to the urea synthesis by mixing with the gas phase from the stripper and with said recovered carbamate solution, thus forming a mixed flow which is then condensed in said carbamate condenser, and the condensate is eventually directed to the reactor.

专利号:WO-2024188890-A1
优先权日:2023-03-10
标 题:A process and plant for the synthesis of urea and melamine
发明人：MARRONE LEONARDO; GAMBA SIMONE; BENEDETTI ALBERTO
权利人:CASALE SA
摘要:An integrated process for the synthesis of urea and melamine, wherein urea synthesized in a urea plant is used to produce melamine in a melamine plant connected to the urea plant, according to a high-pressure non-catalytic melamine synthesis process, wherein melamine is synthesized at a pressure higher than urea synthesis pressure and offgas liberated during the synthesis of melamine are returned, as a gas, to the high-pressure synthesis section of the urea plant.

专利号:US-2024262798-A1
优先权日:2021-07-09
标 题:A process and plant for the synthesis of urea and melamine
发明人：BERTINI PAOLO; FUMAGALLI MATTEO
权利人:CASALE SA
摘要:A process for the synthesis of urea and melamine, wherein urea synthesized in a urea plant is used to produce melamine in a melamine plant connected to the urea plant, according to a high-pressure non-catalytic melamine synthesis process, and offgas ( 16 ) liberated during the synthesis of melamine are returned to the urea plant after offgas processing ( 8 ) which includes a condensation and a urea formation step so that a urea-containing recycle stream ( 19 ) is returned to the synthesis section of the urea plant.

专利号:US-11666883-B2
优先权日:2018-01-26
标题:Plant for the synthesis of melamine with offgas recovery in a tied-in urea plant
发明人：SCOTTO ANDREA; FUMAGALLI MATTEO
权利人:CASALE SA
摘要:Plant for the synthesis of melamine starting from urea, wherein the stream of offgas containing NH3 and CO2 produced by the synthesis of melamine is converted into urea in a dedicated urea plant.