公开(公告)号：US10822242B2

公开(公告)日：2020-11-03

申请号：US16525503

申请日：2019-07-29

Applicant: CHINA UNIVERSITY OF PETROLEUM—BEIJING

Inventor： Haiyan Liu ,  Tao Zheng ,  Zhichang Liu ,  Xianghai Meng ,  Rui Zhang ,  Chunming Xu

IPC: C01B39/44 ,  B01J29/65 ,  B01J35/00

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.

公开(公告)号：US11634334B2

公开(公告)日：2023-04-25

申请号：US17037409

申请日：2020-09-29

Applicant: CHINA UNIVERSITY OF PETROLEUM-BEIJING

Inventor： Tao Zheng ,  Haiyan Liu ,  Zhichang Liu ,  Xianghai Meng ,  Rui Zhang ,  Chunming Xu

IPC: C01B39/44

Abstract: The present disclosure provides a method of synthesizing an aluminosilicate molecular sieve by a crystal seed-assisted method, a natural aluminosilicate clay mineral treated and activated by an alkali is used as a crystal seed for synthesis of the aluminosilicate molecular sieve, and the target molecular sieve product is synthesized by hydrothermal crystallization, wherein the synthesis process does not require addition of conventional crystal seeds of a molecular sieve or use of any organic template agent, thus the synthesized product does not require a calcination process to remove the template agent. The method of synthesizing an aluminosilicate molecular sieve by a crystal seed-assisted method can meet the requirements of both crystallinity and nucleation time, and greatly reduce costs of synthesizing the aluminosilicate molecular sieve, and reduce the environmental pollution caused by removal of the template agent by calcinating.