Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst

Fang Jin; Xianqiao Wang; Tieliang Liu; Linbo Xiao; Ming Yuan; Yangchun Fan

doi:10.1016/j.cjche.2016.11.004

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Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst
- Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst
- 中国化学工程学报（英文版） 2017年25卷第9期页码：1303-1313
- Affiliations：
  
  1. Key Laboratory for Green Chemical Process of Ministry of Education, Hubei Novel Reactor & Green Chemical Technology Key Laboratory, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology,Wuhan,China,430073
  2. Hubei SanNing Chemical Industry Joint Stock Co., Ltd,China
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.11.004
  中图分类号：
- 纸质出版：2017
- Accepted：
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Fang Jin, Xianqiao Wang, Tieliang Liu, 等. Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst[J]. 中国化学工程学报（英文版）, 2017,25(9):1303-1313.

Fang Jin, Xianqiao Wang, Tieliang Liu, Linbo Xiao, Ming Yuan, Yangchun Fan. Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst[J]. , 2017, 25(9): 1303-1313.
Fang Jin, Xianqiao Wang, Tieliang Liu, 等. Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst[J]. 中国化学工程学报（英文版）, 2017,25(9):1303-1313. DOI： 10.1016/j.cjche.2016.11.004.

Fang Jin, Xianqiao Wang, Tieliang Liu, Linbo Xiao, Ming Yuan, Yangchun Fan. Synthesis of ZSM-5 with the silica source from industrial hexafluorosilicic acid as transalkylation catalyst[J]. , 2017, 25(9): 1303-1313. DOI： 10.1016/j.cjche.2016.11.004.

摘要

Abstract

A new effective process to improve the utilization of industrial fluorosilicic acid of phosphate fertilizer by-product has been investigated to comprehensive application of the silicon and fluorine source. Two-step ammoniation was applied to recover high-quality silica. The recovered silica can be used to hydrothermal synthesize ZSM-5 zeolite without impurity phase contamination

which was confirmed by XRD

SEM

BET and EDS characteristic techniques. It was found that with the increase of SiO

/Al

ratio and the extension of reaction time

the crystal type transform from the orthorhombic to the monoclinic phase. The impurity fluorine content of the recovered SiO

from H

SiF

has great influence on the hydrothermal process for ZSM-5 crystal structure formation. Moreover

the increase of fluorine ions content in the hydrothermal process can control the crystal morphology and size of synthesized ZSM-5. Catalytic properties of synthesized HZSM-5 with different SiO

/Al

ratio in transalkylation of toluene and 1

4-trimethylbenzene show good and stable catal

ytic performance. The ZSM-5 synthesized with recovered silica source exhibits similar catalyst life as the performance of small particle size HZSM-5

because the ZSM-5 synthesized with the silica source from industrial hexafluorosilicic acid prefers a thin disk crystal along the b axis direction

which shortens the diffusion distance of generated products.

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