Dalian University of Technology

Research Institute of Shaanxi Yanchang Petroleum (Group) Co., Ltd.

Si Li

Wei Zhang

Ruimin Gao

Hua Zhang

Yuan Zhang

Gang Chen

Xiongfu Zhang

Yongbin Lu

Shuqin Zhang

Zhiling Liu

Mingfeng Wang

Ting Pei

Dapeng Li

Pengju Huo

Chengda Wang

Weiwu Xu

Haiou Liu

Jiuchang He

A method for directly preparing an empty shell type small grain ZSM-5 molecular sieve. The method comprises: uniformly mixing and stirring an organic template agent, a silicon source and water; dripping an aqueous solution of an aluminum source into the mixture; preserving room temperature, and continuously stirring for a period of time; and performing hydrothermal crystallization, and washing, drying and roasting the obtained product to obtain the molecular sieve. The molecular sieve has high degree of crystallinity and uniform particle size. Moreover, the method requires short time, simple operation and only one step, no extra surfactant is needed, and secondary acid and alkali treatment is not needed.

One-step preparation method for hollow shell type small grain ZSM-5 molecular sieve

A rapid synthesis method of a small-crystal-grain ZSM-5 molecular sieve, the method comprising: preparing a mixed silicon-aluminum glue solution, placing the solution in a crystallization kettle for low-temperature nucleation, enabling high-temperature crystallization growth of the solution, and obtaining a crystallization product, namely, a small-crystal-grain ZSM-5 molecular sieve, the nucleation temperature being 60-120&#xb0; C., nucleation time being 1-3 hours, a crystallization growth temperature being 150-170&#xb0; C., and crystallization growth time being 1-3 hours. The method is easy to operate, and has a short operation time, thus being able to complete within 6 hours; in addition, the product has uniform grain sizes, is in a mono-dispersed state, and has a high crystallization degree to a submicron degree.

Rapid synthesis method of small-crystal-grain ZSM-5 molecular sieve

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Xi'an, China

Si Li