54results about "Ferrierite aluminosilicate zeolite" patented technology

The purpose of the present invention is to provide at least one of a zeolite-containing molded body and a potassium adsorption method using the molded body, said molded body being capable of suppressing aluminum elution and removing potassium from a dialysis waste liquid compared to conventional dialysis waste liquid treatment using zeolite.

The present invention relates to a new method for preparing an IZM-8 zeolite of FER framework type, which makes it possible to synthesize an IZM-8 zeolite of FER framework type by converting / transforming a zeolite of FAU framework type under hydrothermal conditions. In particular, said new method makes it possible to synthesize an IZM-8 zeolite of FER framework type, starting from a zeolite of FAU framework type used as a source of silicon and aluminum and a specific organic or structuring molecule comprising a quaternary ammonium function, N-ethyl-N-(3,3,5-trimethylcyclohexyl)pyrrolidinium hydroxide. Said IZM-8 zeolite of FER framework type obtained according to the method of the invention advantageously finds application as a catalyst, adsorbent or separating agent.

Zeolites having a ferrierite framework structure are prepared using one or more of n-propylamine, n-butylamine, isobutylamine and n-amylamine as structure directing agents.

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

An object is to provide at least any of zeolite-containing shaped bodies that can remove potassium from a dialysis effluent with less dissolution of aluminum compared to the conventional treatment of dialysis effluent using a zeolite, and a method of adsorbing potassium using the shaped bodies.

The invention relates to an iron-containing catalytic material for the selective catalytic reduction of NOx in exhaust gases from internal combustion engines. The catalytic material comprises a zeolitic material comprising SiO2 and X2O3 in its framework structure, where X is a trivalent element, such as aluminum, where the zeolitic material has an FER-type framework structure, where the deconvolved 29Si MAS NMR of the zeolitic material comprises a specific first peak (P1) corresponding to the Q4 (1Al) site and having a maximum in the range of-103.5 ppm to-108.5 ppm, and has a certain minimum integral with respect to three other peaks in the range of-90.0 ppm to-130.0 ppm. The catalytic material also comprises Fe supported on the zeolitic material. The invention further relates to a method for producing a catalytic material, to an exhaust gas treatment system comprising a catalytic material according to the invention, to the use of the exhaust gas treatment system and to a method for treating exhaust gases comprising said catalytic material.

To provide an ammonium ion adsorbent that can remove ammonium ions in a cell culture medium to recycle the culture medium, while greatly reducing an influence on the metal ion composition in the culture medium and eliminating an adverse effect on the cells.SOLUTION: An ammonium ion adsorbent supports Na ions and K ions. A mol ratio of the Na ions and K ions supported on the adsorbent (K / Na value) is 0 or more and 50 or less.SELECTED DRAWING: Figure 3

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.

A zeolite having a ferrierite framework structure produced using one or more of n-propylamine, n-butylamine, isobutylamine, and n-pentylamine as a structure directing agent.

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 present invention relates to a kind of HZSM 35 molecular sieve and preparation method thereof, the HZSM 35 molecular sieve crystal presents lamellar crystalline structure, thickness is less than 50nm, length or width is less than 500nm, and the HZSM 35 molecular sieve has very high B acid amount, and B acid amount is more than 1.0mmol / g.Preparation method comprises the following steps:Step 1, heating at a certain temperature after mixing silicon source, ZSM 35 molecular sieve, water and inorganic base to obtain reaction product;Step 2, crystallizes after silicon source, aluminum source, water, inorganic base, the reaction product obtained in step 1 and template agent mixing, and the crystallized product is washed, dried and roasted to obtain ZSM 35 molecular sieve;Step 3, ammonium exchange is carried out by ZSM 35, then drying, roasting, obtain HZSM 35 molecular sieve.The HZSM 35 molecular sieve obtained using the above method of the present invention has smaller particle size and higher B acid amount, and in catalyzing light olefin skeletal isomerization reaction, shows higher normal olefin conversion rate and isoolefin selectivity.

An organo-template free method for the manufacture of a ferrierite (FER) zeolite and the ferrierite producible by the method. The method comprises (i) forming a reaction gel comprising an aluminium source, sodium and / or potassium hydroxide, and silica sol; and (ii) heating the reaction gel to a temperature and for a duration suitable for the growth of the FER zeolite. The reaction gel does not comprise seed crystals. Moreover the reaction gel does not comprise an organic structure directing agent (OSDA). The ferrierite (FER) zeolite has the following features: a) a SAR of between 11 and 20; b) a BET surface area of between 320 and 380 m2 / g; and c) a micropore volume of between 0.1 and 0.2 cm3 / g.

Zeolite-containing shaped bodies that remove potassium from a dialysis effluent with less dissolution of aluminum compared to the conventional treatment of dialysis effluent using a zeolite, and a method of adsorbing potassium using the shaped bodies.

The invention provides a binder-free ZSM-35 catalyst as well as a preparation method and application thereof, and belongs to the technical field of skeletal isomerization catalysts. The preparation method comprises the following steps: uniformly mixing a silicon source, an aluminum source, an alkali source, a pore-enlarging agent and water, removing part of a solvent to obtain a dry base, carrying out extrusion molding on the obtained dry base, and crystallizing in a template agent solution for a period of time to prepare the binder-free ZSM-35 catalyst. The binder-free ZSM-35 catalyst can be synthesized without adding a molecular sieve as a seed crystal for induction, the olefin conversion rate and selectivity of the binder-free ZSM-35 catalyst are both superior to the catalytic effect of a conventional ZSM-35 catalyst under the same reaction condition, and the binder-free ZSM-35 catalyst is suitable for large-scale production in factories.

The present disclosure relates to a template free modified ferrierite zeolite has a Si / Al ratio in the range of 12 to 13. Further, the present disclosure also provides a method of preparation of a modified ferrierite zeolite. The present disclosure also provides a process of conversion of oleic acid to iso-stearic acid by using the modified ferrierite zeolite. The commercial grade oleic acid conversion is about 85% and isostearic acid selectivity is about 86%.

The present invention discloses a mesoporous ZSM-35 molecular sieve and a preparation method thereof. The mesoporous ZSM-35 molecular sieve contains abundant mesoporous channels, and the mesopores are relatively concentratedly distributed, with a most probable pore diameter of 2 to 6 nm and a total specific surface area of ​​400 to 650 m 2 / g, and the mesopore specific surface area is 50-200m 2 / g, and the crystal size is 0.5 to 5 μm. The preparation method mixes an alkali source, a silicon source, an aluminum source, water and a template, performs a crystallization reaction after mixing evenly, and then further separates, washes and dries. The obtained solid phase material is further mixed with a silicon source, an aluminum source, an alkali source and water, mixed evenly and processed, and then separated and dried to obtain a ZSM‑35 molecular sieve. The preparation method of the mesoporous ZSM‑35 molecular sieve can retain the integrity of the ZSM‑35 molecular sieve crystal structure as much as possible while creating mesoporous channels in the molecular sieve crystal.

The present invention provides a method for preparing an efficient and environmentally friendly ZSM-35 molecular sieve by recycling a synthetic mother liquor, and belongs to the technical field of molecular sieve preparation. The method of the present invention first recycles and concentrates the ZSM-35 molecular sieve synthesis mother liquor to obtain a circulating mother liquor, and then mixes a silicon source, an aluminum source, an alkali source, a template agent, and water, and adds the circulating mother liquor to prepare an H-type ZSM-35 molecular sieve, reducing the grain size of the molecular sieve. The present invention recycles the mother liquor and as one of the key raw materials, reinvests it in the preparation process of the ZSM-35 molecular sieve, realizes the recycling of resources and the continuous production of molecular sieves. The method of the present invention can improve the utilization efficiency of raw materials, reduce production costs, and significantly reduce the burden on the environment, and promote the development of green chemical synthesis technology.

To provide at least one of an industrially applicable manufacturing method of a manganese sulfate solution, that does not generate jarosite and comprises a step of selectively removing potassium from a sulfuric acid acidic manganese solution; and a manufacturing method of manganese oxide using the manganese sulfate solution.SOLUTION: A manufacturing method of a manganese sulfate solution comprises a step of adsorbing a potassium ion on a zeolite by making a molar ratio of silica to alumina be 6 or more, and bringing the manganese sulfate solution containing the potassium ion into contact with the zeolite containing an oxygen 8-membered ring in a skeletal structure.SELECTED DRAWING: None

The present invention provides a hydrocarbon adsorption device (10) that allows a fluid to flow therethrough and adsorbs hydrocarbons in the above-mentioned fluid. The hydrocarbon adsorption device (10) has a first hydrocarbon adsorption section (20) containing zeolite and a second hydrocarbon adsorption section (30) containing zeolite, which is provided on the downstream side of the first hydrocarbon adsorption section (20) in the flow direction of the above-mentioned fluid. The pore diameter (P1) of the zeolite contained in the first hydrocarbon adsorption section (20) is smaller than the pore diameter (P2) of the zeolite contained in the second hydrocarbon adsorption section (30) (i.e., P1 < P2).

A secondary growth procedure described herein is used to prepare finned zeolites. The finned zeolites possess properties that are distinctly unique compared to crystals of similar size lacking fins. The procedure is amenable to a wide range of zeolite crystal structures.

The application relates to a synthesis of Cu-ZSM-35 molecular sieve and a preparation method and application of a bio-jet fuel catalyst prepared by a one-step method of bio-oil, and the Cu-ZSM-35 molecular sieve is synthesized by a two-step crystallization method: (1) a mixed solution of sodium metaaluminate, a structure directing agent SDA and deionized water is added into a sodium hydroxide solution to obtain solution A; (2) silica sol is added into a sodium hydroxide solution and is fully mixed to obtain solution B; (3) the A and B solutions are mixed, and seeds are added to obtain a synthesis gel, and the synthesis gel is hydrothermally crystallized in a reaction kettle; (4) a mixed solution of a copper-ammonia complex and a structure directing agent SDA is added, and crystallization is carried out under microwave conditions to obtain the Cu-ZSM-35 molecular sieve with high skeleton active component content, uniform distribution and good crystallization, the Cu doping amount is 2-5 wt%, and the Cu-ZSM-35 catalyst is prepared through steps of molding, alkali treatment and the like. The catalyst prepared by the scheme has excellent one-step bio-jet fuel preparation performance, and the selectivity and yield of C9-C16 can reach 56.90% and 54.52%.

A secondary growth procedure described herein is used to prepare finned zeolites. The finned zeolites possess properties that are distinctly unique compared to crystals of similar size lacking fins. The procedure is amenable to a wide range of zeolite crystal structures.

To provide an FER type zeolite which generates less N2O in nitrogen oxide reduction than conventional iron-containing FER type zeolites and is industrially applicable or a production method for the same, or a nitrogen oxide reduction catalyst comprising the same.SOLUTION: An FER type zeolite contains iron and has an area ratio of the peak in the spectrum having a wavelength of 300 nm to 600 nm to the peak having a wavelength of 190 nm to 600 nm in a UV-VIS spectrum, where the area ratio is 20% or less.SELECTED DRAWING: Figure 2

An organo-template free method for the manufacture of a ferrierite (FER) zeolite and the ferrierite producible by the method. The method comprises (i) forming a reaction gel comprising an aluminium source, sodium and / or potassium hydroxide, and silica sol; and (ii) heating the reaction gel to a temperature and for a duration suitable for the growth of the FER zeolite. The reaction gel does not comprise seed crystals. Moreover the reaction gel does not comprise an organic structure directing agent (OSDA). The ferrierite (FER) zeolite has the following features: a) a SAR of between 11 and 20; b) a BET surface area of between 320 and 380 m2 / g; and c) a micropore volume of between 0.1 and 0.2 cm3 / g.

The invention relates to a preparation method of an iron-containing FER structure molecular sieve, which comprises the following steps: mixing an aluminum source, a silicon source, an alkali source, an organic template agent, a first phosphorus source and optional water to obtain a first mixture; mixing an iron source, a second phosphorus source, the first mixture and optional water to obtain a second mixture; performing crystallization treatment on the second mixture to obtain a crystallized product; wherein the second mixture is composed of M, Al2O3, SiO2, P2O5, Fe2O3, R and H2O according to the ratio of M to Al2O3 to SiO2 to P2O5 to Fe2O3 to R to H2O being (0.01-1) to (0.01-0.1) to 1 to (0.001-1) to (0.001-1) to (0.01-1) to (5-300) in terms of oxide and mole, M represents an alkali metal oxide, and R represents an organic template agent. The iron-containing FER structure molecular sieve disclosed by the invention has the advantages of high silica-alumina ratio, simple preparation process and low production cost, and shows higher catalytic activity when being used for catalytic cracking to produce more low-carbon olefins.

The invention discloses a low-cost preparation method of a ZSM-35 molecular sieve. Belongs to the field of molecular sieve synthesis. Comprising the following steps: mixing an aluminum source, a silicon source, a template agent, potassium hydroxide, sodium hydroxide and water at room temperature to obtain a mixed solution, putting the mixed solution into a closed container, crystallizing, centrifuging, washing, drying and roasting to obtain the ZSM-35 molecular sieve, according to the method, a silicon source and an aluminum source are subjected to a crystallization reaction in an alkaline environment, and the ZSM-35 molecular sieve with good crystal crystallinity is prepared at low cost by reducing parameters such as process temperature in different stages through a specific feeding sequence. The preparation process of the traditional ZSM-35 molecular sieve is simplified, the production efficiency is improved, the energy is saved, and the cost is reduced.

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.

To provide an FER type zeolite which generates less N2O in nitrogen oxide reduction than conventional iron-containing FER type zeolites and is industrially applicable or a production method for the same, or a nitrogen oxide reduction catalyst comprising the same.SOLUTION: An FER type zeolite contains iron and has an area ratio of the peak in the spectrum having a wavelength of 300 nm to 600 nm to the peak having a wavelength of 190 nm to 600 nm in a UV-VIS spectrum, where the area ratio is 20% or less.SELECTED DRAWING: Figure 2

A method of making a catalyst for the synthesis of dimethyl ether from syngas includes making a mesoporous ferrierite (FER), and co-precipitating precursors of mesoporous ferrierite and Cu-Zn-Al based oxides (CZA) to obtain a mixed CZA / mesoFER catalyst.

A method of making a catalyst for gasoline reactions of dimethyl ether is disclosed, which includes reacting a silica source, an aluminum source, and a structure derivative to synthesize a zeolite sol, mixing an alcohol with an organic template to form an emulsion phase, and adding the zeolite sol to the emulsion phase to react.