Surface Acidic Properties of Loaded Heteropoly Acid and Preparation of Dimethylether by Catalyzed Dehydration of Methyl Alcohol

Chemical Research in Chinese Universities ›› 1997, Vol. 13 ›› Issue (1): 1-6.

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Surface Acidic Properties of Loaded Heteropoly Acid and Preparation of Dimethylether by Catalyzed Dehydration of Methyl Alcohol

HUA Rui-nian, WANG Yuan-hong, GONG Jian, ZU Wei, QU Lun-yu

Department of Chemistry, Northeast Normal University, Changchun 130024

Received:1996-01-20 Online:1997-01-24 Published:2011-08-17
Supported by:
Supported by the National Natural Science Foundation of China.

Abstract

Abstract: The acidity and surface properties of H₄SiW₁₂ O₄₀ -Ti(SO₄)₂- La₂O₃ HZSM-5(HTLH) were investigated by means of TEM, TPD and IR spectra. The activity and selectivity of the product as a catalyst for methanol to dimethylether were studied. The results show that there are Brnsted and Lewis acid sites in HTLH and that the total acidity is concerned with the conversion of methanol and the yield of dimethylether. The catalytic capacity of the acid at 453 K is the best. Keggin unit [SiW₁₂ O₄₀]^4- deposits on the external HZSM-5 surface only, and it can not permeate through the HZSM-5 pore system.

Key words: HZSM-5,12-Tungstosilicic acid, Loading, Acidity, Dimethylether

HUA Rui-nian, WANG Yuan-hong, GONG Jian, ZU Wei, QU Lun-yu . Surface Acidic Properties of Loaded Heteropoly Acid and Preparation of Dimethylether by Catalyzed Dehydration of Methyl Alcohol[J]. Chemical Research in Chinese Universities, 1997, 13(1): 1-6.

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Surface Acidic Properties of Loaded Heteropoly Acid and Preparation of Dimethylether by Catalyzed Dehydration of Methyl Alcohol

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