✦ LIBER ✦

External modification of zeolite by metal surfactant for methanol amination

✍ Scribed by Zeshan Hu; Wei Lihui; Songying Chen; Junxiu Dong; Shaoyi Peng

Book ID: 104431343
Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 108 KB
Volume: 21
Category: Article
ISSN: 1387-1811
DOI: 10.1016/s1387-1811(97)00015-2

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✦ Synopsis

HZSM-5 was modified by the surfactant magnesium valerate. The adsorption of the surfactant on HZSM-5 was studied. The total acidities of zeolites were measured by ammonia TPD before and after the modification. The activities and selectivities of methanol amination over the zeolites were evaluated. The results indicated that: (1) the modification could increase total selectivities of monomethylamine (MMA) and dimethylamine (DMA) without evident loss of activity. (2) Two modifications treatments could give higher total selectivity than one treatment: so did a lower heating rate of calcination. (3) The total selectivity rose with an increase of Mg content of the modified zeolites. (4) A single layer adsorption of the surfactant molecules on external surface of zeolites could be obtained.

(5) The total acidities of modified zeolites decreased and approached a constant with an increase of Mg content.

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