10results about "Ferrierite aluminosilicate zeolite" patented technology

Provided is at least one of an FER-type zeolite that generates less N2O during nitrogen oxide reduction compared to a typical iron-containing FER-type zeolite and that can be industrially applied, a production method therefor, and a nitrogen oxide-reducing catalyst including the same.

This invention relates to the fields of catalysts and polymer material recycling, and discloses a dual-pore composite catalyst, its preparation method, and its application in the direct catalytic cracking of waste plastics to produce low-carbon olefins. The dual-pore composite catalyst comprises a modified ZSM-35 molecular sieve and a short rod-shaped mesoporous molecular sieve. The modified ZSM-35 molecular sieve includes ZSM-35 molecular sieve and boron oxide and metal oxide supported on the ZSM-35 molecular sieve. Based on the total weight of the dual-pore composite catalyst, the content of the modified ZSM-35 molecular sieve is 46-70% by weight, and the content of the short rod-shaped mesoporous molecular sieve is 30-54% by weight. This dual-pore composite catalyst, in the direct cracking of waste plastics to produce low-carbon olefins, not only solves the problem of waste plastic recycling but also increases the production of important chemical raw materials such as low-carbon olefins, representing a new one-step catalytic conversion and utilization pathway for waste plastics.

The invention provides a spherical nano ZSM-35 molecular sieve as well as a preparation method and application thereof. The spherical nano ZSM-35 molecular sieve disclosed by the invention is formed by self-assembling a plurality of long-strip rod-shaped nano ZSM-35 molecular sieves; the grain size of the spherical nano ZSM-35 molecular sieve is 40 to 100 nm, and the length of the long-strip rod-shaped nano ZSM-35 molecular sieve is preferably within 100 nm. The spherical nano ZSM-35 molecular sieve obtained by the preparation method disclosed by the invention has smaller grain size, higher specific surface area and higher external specific surface area, and has the advantages of high diffusion and high activity in applications such as catalysis, adsorption separation and the like.

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.

The present invention relates to an iron-containing catalytic material for the selective catalytic reduction of NOx in exhaust gas from an internal combustion engine. The catalytic material comprises a zeolitic material comprising SiO2 and X2O3 in its framework structure, wherein X is a trivalent element such as aluminium, wherein the zeolitic material has an FER-type framework structure, wherein the deconvoluted 29Si MAS NMR of the zeolitic material comprises a specific first peak (Pl) corresponding to Q4(1AI) sites and having a maximum in the range of from -103.5 to -108.5 ppm with a certain minimum integral relative to three other peaks in the range of -90.0 to -130.0 ppm. The catalytic material also comprises Fe supported on the zeolitic material. Further, the present invention relates to a process for producing a catalytic material, an exhaust gas treatment system comprising a catalytic material in accordance with the present invention as well as to use thereof and a process for the treatment of an exhaust gas including said catalytic material.

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.

To provide at least one of a molded body containing zeolite that is capable of removing potassium from dialysis drainage while being suppressed in elution of aluminum in comparison to processing of dialysis drainage using conventional zeolite, and a potassium absorption method using the molded body.SOLUTION: A molded body includes: zeolite having an oxygen 8-membered ring structure; and at least one of a silica binder and a zirconia binder. A ratio of a cumulative pore volume of pore diameters of 10 nm or more and 100 nm or less to a cumulative pore volume of pore diameters of 5 nm or more and 300 nm or less is 25 vol.% or more and 70 vol.% or less. In addition, the molded body satisfies the following (1) or (2): (1) an average aspect ratio is 1.55 or less, and a particle diameter D50 is 200 μm or more and 600 μm or less; and (2) the average aspect ratio is greater than 1.55.SELECTED DRAWING: None

This invention relates to an SBA molecular sieve encapsulated with nano-metal particles, its preparation method, and its application. The preparation method includes the following steps: S1: Passivating the raw SBA molecular sieve powder to obtain passivated SBA molecular sieve powder; S2: Adding an alkaline solution to the passivated SBA molecular sieve powder obtained in step S1 to obtain an SBA molecular sieve powder intermediate; S3: Adding a metal complex solution to the SBA molecular sieve powder intermediate obtained in step S2 to obtain product A, wherein the metal particles in the metal complex are iron, cobalt, or nickel particles; S4: Uniformly mixing an organic template agent, water, a silicon source, and an acid to form a gel to obtain product B; S5: Mixing product A obtained in step S3 and product B obtained in step S4, and performing crystallization treatment, followed by washing, drying, and calcination to obtain the target product. The nanoparticles in the molecular sieve prepared by this invention are all located within the molecular sieve channels, improving the catalytic performance of the catalyst.

A catalyst based on zeolite with a controlled distribution of aluminium atoms in the zeolite structure and with a specific location of divalent transition metal cations, such as iron and zinc cations, in the zeolite and a method for producing acetic acid and methyl acetate from carbon dioxide and methane using such a catalyst are disclosed. The structure of the zeolite is selected from CHA, FER, MOR and *BEA.

The present invention relates to a process for the production of jet fuels, diesel, or components thereof from a pretreated feed comprising at least 90 wt.-% liquid paraffins by a hydroisomerization reaction using a support-based metal impregnated EU-2-based zeolite as a catalyst. According to the method, the desired product distribution is adjusted by the hydroisomerization reaction temperature.