AN UNUSUAL SUPPRESSION OF TRIMETHYLAMINE FORMATION IN THE HIGH-TEMPERATURE ALKYLATION OF AMMONIA WITH METHANOL OVER (NH4)3PW12O40

被引：6

作者：

NASIKIN, M

NAKAMURA, R

NIIYAMA, H

机构：

[1] TOKYO INST TECHNOL, INT COOPERAT CTR SCI & TECHNOL, OOKAYAMA, MEGURO KU, TOKYO 152, JAPAN

[2] TOKYO INST TECHNOL, FAC ENGN, DEPT CHEM ENGN, MEGURO KU, TOKYO 152, JAPAN

来源：

CHEMISTRY LETTERS | 1993年 / 02期

关键词：

D O I：

10.1246/cl.1993.209

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A synthesis of methylamines from ammonia and methanol was studied by using mainly the title heteropoly catalyst. Although at low temperatures below ca. 750 K the three methylamines (MMA, DMA, and TMA) were formed as usual, at higher temperatures the formation of TMA was completely suppressed. This unusual product selectivity was explained by the strong adsoption of TMA to the catalyst.

引用

页码：209 / 212

页数：4

共 30 条

[21] Structure of porous aggregates of the ammonium salt of dodecatungstophosphoric acid, (NH4)(3)PW12O40: Unidirectionally oriented self-assembly of nanocrystallites
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[22] Synthesis of polymers via cationic ring-opening polymerization using (NH4)3PW12O40-SiO2composite catalyst
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[26] Alkylation of toluene with methanol on microporous MxH3−XPW12O40 [M=K+, Cs+, NH4+ and Tl+]
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[27] Heteropolyacid-Based Ionic Liquid [HOOCC5H4NH]3PW12O40 as the Eco-Friendly Catalyst for the One-Pot Synthesis of Xanthenediones under Solvent-Free Conditions
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[28] Crystal Chemistry and High-Temperature Behaviour of Ammonium Phases NH4MgCl3•6H2O and (NH4)2Fe3+Cl5•H2O from the Burned Dumps of the Chelyabinsk Coal Basin
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[29] Crystal structure of diammonium hexaaquazinc(II) bis[(μ12-molybdato)-tetracosa(μ2-oxo)-dodecaoxo-dodecatungsten] - ammonia - water (1:4:36), [NH4]2[Zn(H2O)6][(MoW12O40)2] • 4NH3 • 36H2O
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[30] OXIDATIVE DEHYDROGENATION OF ISOBUTYRIC ACID TO METHACRYLIC-ACID OVER HETEROPOLYSALTS OF COMPOSITION K-X(NH4)(3-X)PMO12O40 - EFFECT OF CATALYST PRETREATMENT AND COMPOSITION ON THE ACTIVITY AND SELECTIVITY
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