2results about "Ferrierite aluminosilicate zeolite" patented technology

This application discloses a ZSM-35 molecular sieve and its preparation method, belonging to the field of ZSM-35 molecular sieve synthesis technology. The ZSM-35 molecular sieve is a pure phase. In the X-ray powder diffraction pattern of the ZSM-35 molecular sieve: at 2θ angles of (9.3±2)°, (12.5±2)°, (12.7±2)°, (13.4±2)°, (22.3±2)°, (22.5±2)°, (23.1±2)°, (23.6±2)°, (24.4±2)°, (25.2±2)°, (… Characteristic diffraction peaks of ZSM-35 molecular sieve (9.3), (12.5), (12.7), (13.4), (22.3), (22.6), (23.2), (23.6), (24.4), (25.2), (25.6), and (29.4) were observed at (25.6±2)° and (29.4±2)°. The relative crystallinity of ZSM-35 molecular sieve is 95~180. The preparation method of ZSM-35 molecular sieve uses a template agent and a single alkali source, which shortens the synthesis time, produces ZSM-35 molecular sieve with high crystallinity, has good reproducibility, and is easy to industrialize; moreover, the raw materials used are inexpensive, reducing the synthesis cost.

A method for producing ferrierite (FER) zeolite without an organic template and ferrierite producible by the method. The method includes: (i) forming a reaction gel containing an aluminum source, sodium hydroxide and / or potassium hydroxide, and a silica sol; and (ii) heating the reaction gel at a temperature suitable for the growth of FER zeolite for a period suitable for the growth of FER zeolite. The reaction gel does not contain seed crystals. Further, the reaction gel does not contain an organic structure directing agent (OSDA). The ferrierite (FER) zeolite has the characteristics of: a) an SAR of 11 to 20, b) a BET surface area of 320 to 380 m 2 / g, and c) a micropore volume of 0.1 to 0.2 cm 3 / g.