公开(公告)号：US20170190589A1

公开(公告)日：2017-07-06

申请号：US15500445

申请日：2015-07-14

Applicant: RESEARCH INSTITUTE OF SHAANXI YANCHANG PETROLEUM (GROUP) CO., LTD. ,  DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Jiuchang HE ,  Wei ZHANG ,  Xiongfu ZHANG ,  Dapeng LI ,  Ruimin GAO ,  Yongbin LU ,  Shuqin ZHANG ,  Mingfeng WANG ,  Pengju HUO ,  Si LI ,  Yuan ZHANG ,  Zhiling LIU ,  Gang CHEN ,  Ting PEI ,  Hua ZHANG

IPC: C01B39/40

CPC classification number: C01B39/40 ,  C01P2004/04 ,  C01P2004/34 ,  C01P2004/38 ,  C01P2004/62

Abstract: 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.

公开(公告)号：US20170233259A1

公开(公告)日：2017-08-17

申请号：US15505490

申请日：2015-07-14

Applicant: RESEARCH INSTITUTE OF SHAANXI YANCHANG PETROLEUM (GROUP) CO., LTD ,  DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Wei ZHANG ,  Xiongfu ZHANG ,  Dapeng LI ,  Ruimin GAO ,  Yongbin LU ,  Shuqin ZHANG ,  Mingfeng WANG ,  Pengju HUO ,  Si LI ,  Chengda WANG ,  Weiwu XU ,  Yuan ZHANG ,  Zhiling LIU ,  Ting PEI ,  Hua ZHANG ,  Gang CHEN ,  Haiou LIU

IPC: C01B39/40

CPC classification number: C01B39/40 ,  B01J29/40 ,  C01P2002/60 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/60 ,  C01P2004/62

Abstract: 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° C., nucleation time being 1-3 hours, a crystallization growth temperature being 150-170° 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.

公开(公告)号：US20250084806A1

公开(公告)日：2025-03-13

申请号：US18962602

申请日：2024-11-27

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Fengnan GUO ,  Yanxiang REN ,  Fengrui LI ,  Hua ZHANG ,  Yiming LI ,  Wenyu LI ,  Hongfeng JI ,  Lin FU

IPC: F02K9/12 ,  B33Y80/00 ,  F02K9/36

Abstract: The present invention discloses a multistage variable burning rate solid rocket motor and a forming method. A multi-material composite fiber skeleton structure is embedded inside a propellant in the present invention, so that the original burning rate of the propellant presents multistage changes to achieve the function of multistage thrust. The fiber skeleton structure embedded in the solid rocket motor is formed by additive manufacturing, fixed in a combustion chamber, and then charged at one time to complete the forming of a motor grain. The design can greatly increase the burning rates of the propellants of end-burning and bore-burning motors, and can also conduct multistage adjustment for the burning rates of the motors by changing the fiber skeleton and structure, so as to satisfy the requirements of missile weapon systems for multistage power propulsion. The present invention greatly simplifies the technological production process of the existing single-chamber multi-thrust motor.