ZSM-35 molecular sieve and preparation method thereof

US10822242B2 · kind B2 · utility

Assignee

• China University of Petroleum—Beijing · CN

Inventors

• Haiyan Liu · Beijing, CN
• Tao Zheng · Dongcheng District, CN
• Zhichang Liu · Evanston, US
• Xianghai Meng · Beijing, CN
• Rui Zhang · Hubei, CN
• Chunming Xu · Beijing, CN

Key dates

• Filing date: Jul 29, 2019
• Grant date: Nov 3, 2020
• Expiry date: Jul 29, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/17
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present application provides a ZSM-35 molecular sieve and a preparation method thereof. The ZSM-35 molecular sieve is an aggregated ZSM-35 molecular sieve having a hierarchical macro-meso-microporous pore structure. Raw materials for the preparation method do not include an organic template agent and a crystal seed, and the preparation method includes the following steps: preparing a reactant gel where a molar ratio of SiO2, Al2O3, Na2O, K2O, oxygen-containing acid radical and H2O is (20-40):1.0:(1.5-2.0):(4.0-6.5):(1.0-4.0):(600-1200); sequentially performing an aging treatment and a crystallization treatment on the reactant gel, washing and drying a resulting synthetic product. The ZSM-35 molecular sieve provided by the present application may be obtained by synthesizing without using an organic template agent and crystal seed, and because it has a hierarchical pore structure, it is favorable for material diffusion and mass transfer.