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请教大家几个翻译的问题，英语好的帮帮忙哦 Dodeca-Tungstophosphoric acid(TPA) Dodeca-Molybdo phosphoric acid ammonium salt hydrate(DMAA) Dodeca-Molybdo Phosphoric acid(PMA) 分别代表的什么物质啊，谢谢！ |
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xbhchina
木虫 (职业作家)
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4楼2008-06-25 14:50:17
joinfun2005
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buffaloli(金币+2,VIP+0):多谢，辛苦了！
buffaloli(金币+2,VIP+0):多谢，辛苦了！
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网上查的，希望有用 Dodeca-Tungstophosphoric acid(TPA)： H3PO4.12WO3.x H2O Dodeca-Molybdo phosphoric acid ammonium salt hydrate(DMAA)：H12Mo12N3O40P+aq Dodeca-Molybdo Phosphoric acid(PMA)： H3PO4.12MoO3.x H2O Synthesis of Pharmaceutical Intermediates by Toluene Benzylation over Heteropoly Acids on Different Support V. V. Bokade G.D. Yadav《天然气化学杂志》,2007年第16卷第2期 Selective formation of pharmaceutical intermediates like diphenylmethane, dimethyldiphenylmethane, benzyl toluene and benzoic acid by liquid phase, toluene benzylation with benzyl chloride as a benzylating agent, was systematically studied over plane clay （K-10, montmorillonite）, plane H-Beta, plane MFI structured titanosilicate （TS-1） and heteropoly acids [HPA, namely dodecatungstophosphoric acid [H3PO4.12WOa-xH2O] （TPA）, dodeca-molybdo phosphoric acid ammonium salt hydrate [H12Mo12N3040P＋aq] （DMAA）, sodium tungstate hydrated purified [Na12WO4.2H2O] （STH）] supported on clay, H-beta and TS-1. The 20%TPA/Clay, 30%TPA/H-Beta and 30%TPA/TS-1, were observed to be the best catalyst samples over plane clay, plane H-Beta and plane TS-1. The catalyst samples are compared with respect to benzyl chloride conversion and selectivities for diphenylmethane, dimethyl-diphenylmethane, benzyl toluene and benzoic acid. The reaction follows the pseudo-first order rate power law model. The apparent rate constants are calculated and compared with the reported ones. 相似文献 2. Toluene Alkylation with Methanol to p-Xylene over Heteropoly Acids Supported by Clay V. V. Bokade S. S. Deshpande R. Patil S. Jain G. D. Yadav《天然气化学杂志》,2007年第16卷第1期 The alkylation of toluene with methanol for the selective formation of p-xylene was systematically studied. Very few studies have been reported on the use of superacids such as heteropolyacids on cheap supports, such as clay. This article deals with the use of different heteropoly acids （HPAs）, viz, Dodeca-Tungstophosphoric acid [H3PO4.12WO3.xH2O] （TPA）, Dodeca-Molyhdo phosphoric acid ammonium salt hydrate [H12Mo12N3O40P＋aq] （DMAA）, Dodeca-Molyhdo Phosphoric acid （PMA） on clay （MontmoriUonite, K-10） and as such plain clay. This comparative study reveals that 20%PMA/Clay shows 62% toluene conversion and 100% selectivity toward p-xylene |
2楼2008-06-24 15:40:12
3楼2008-06-25 10:10:37
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