76results about How to "Unobstructed channel" patented technology

The invention discloses a light oil type hydrocracking catalyst with a composite molecular sieve. The hydrocracking catalyst comprises the composite molecular sieve consisting of a modified Y-molecular sieve and a modified ZSM-23 molecular sieve, a carrier composed of micropore aluminum oxides, and a hydrogenation activity component composed of a VIB group metal and a VIII group metal. The hydrocracking catalyst is characterized in that the composite molecular sieve comprises the modified Y-molecular sieve and the modified ZSM-23 molecular sieve, and the Y-molecular sieve is modified and dealuminized, so that heat stability and hydrothermal stability are stably enhanced, the hydrophobicity is enhanced, the absorption and desorption properties of the molecular sieve are improved, and the catalyst achieves a high catalytic cracking property. The pore passages of the modified SM-23 molecular sieve are unobstructed, the number of the acid sites is small, the isomerism property is outstanding, and the octane value of the molecular sieve is increased because of light naphtha components. The modified Y-molecular sieve and the modified ZSM-23 molecular sieve are mixed and used according to a formula ratio of the hydrocracking catalyst, so that both the cracking activity and the isomerism property are considered, and the final catalyst achieves an ideal catalytic effect.

The invention relates to an inferior heavy oil hydrodesulfurization catalyst and a preparation method thereof. The catalyst takes aluminum oxide as the carrier, and adopts group VIII and group VIB elements especially Ni-Mo as the active components, the catalyst pore volume is 0.45-0.60cm<3> / g, the specific surface area is 205-260m<2> / g, the average pore diameter is 7.0-12.0nm, and the average pore diameter gradually increases from the center to the outer surface along the radial direction of the catalyst particles. According to the preparation method of the catalyst, a concentration continuously increasing acid solution is employed to treat molded and roasted carrier particles. The catalyst provided by the invention has large surface aperture, wide pore channel, excellent diffusion performance, high hydrodesulfurization activity and activity stability.

The invention discloses a hydro dewaxing catalyst and the preparation method. In the method, compound with hydrogen active component is mixed with aluminum dry gel to prepare adhesive; and then the adhesive is mixed with shape-selective cracked zeolite and is pinched in shape; after drying and roasting, catalyst carrier is yielded; then the catalyst carrier is impregnated in the impregnating solution containing the rest active component and promoter; and after drying and roasting again, the catalyst of the invention is yielded. The invention is capable of taking full advantage of the alumina used as adhesive in the catalyst carrier under low hydrogen active component content conditions to prepare adhesive containing all the molybdenum and tungsten and part of the nickel, thereby keeping a certain amount of nickel oxide in the zeolite. The rest of the active metal component is distributed in the alumina, keeping the zeolite passage unobstructed with good hydro dewaxing effect and effectively improving the hydrogen addition and purification performance of the catalyst. The catalyst is especially suitable for hydro dewaxing of raw material containing wax and with high nitrogen impurity content and suitable for hydrogen addition and purification.

The invention provides a method for modifying an extrusion moulding titanium silicalite molecular sieve. The method comprises the following specific steps: adding a titanium source into an alcohols solvent dropwise, sequentially adding a quaternary ammonium base, water and a protective agent, reacting for 10-60 minutes at the temperature of 20-30 DEG C to obtain a modified solution, mixing the modified solution and a strip titanium silicalite molecular sieve TS-1 obtained through extrusion moulding, putting the mixture in a crystallization kettle, processing for 12-48 hours at the temperature of 100-190 DEG C, separating a solid, washing the solid, and carrying out drying and roasting to obtain the strip titanium silicalite molecular sieve with high titanium content on the outer surface. The method solves the problems that the titanium content of a framework on the outer surface of the extrusion moulding titanium silicalite molecular sieve TS-1 is low and the large molecule is difficult to diffuse, the TS-1 with high titanium content of the framework on the outer surface is prepared, then the diffusion path of a reactant is shortened, the activity of the TS-1 in catalysis of a macromolecule reaction is improved, and the application of the TS-1 is further expanded.

The invention provides a forming method of an integral cellular molecular sieve based catalyst. The forming method comprises the following steps: (1) impregnating a molecular sieve in a metal solution, and performing stirring, drying and high-temperature calcining to prepare a powdery molecular sieve based catalyst; (2) adding an adhesive, an extrusion aid, an acid solution and water, and mixing and kneading to obtain a wet material paste; (3) performing primary smelting, vacuum refining and high-pressure vacuum extrusion on the wet material paste to extrude to form a cellular integral wet-based blank body; (4) preparing the cellular integral molecular sieve based catalyst from the blank body by drying, cutting, polishing and calcining for 6-10 h at 500-550 DEG C. The forming method can precisely control key parameters in the drying process and limit the water loss rate of the blank body, and ensures that the blank body is high in strength and neat and orderly in shape. The forming method can be applied to industrial mass production, and adopts equipment in the prior art to reasonably arrange the process route so as to obtain qualified industrial application products.

The invention relates to a catalyst for synthesizing methyl tertiary butyl ether (MTBE) and methyl isoamyl ether, and a preparation method. The catalyst comprises a molecular sieve and a bonding agent, wherein the bonding agent takes up 10-20% of the catalyst in mass, the bonding agent is mixed glue solution of nanometer aluminum oxide and water glass, the water glass takes up 60-95% of the bonding agent, and the mole ratio of SiO2 / Al2O3 in the molecular sieve is 25-500, the bonding agent used for forming is silicon-aluminum mixed glue solution containing 60-95% of water glass. The formed catalyst uses the low-concentration hydrochloric acid for removing aluminum. According to the catalyst, under the reaction temperature of 85 DEG C and 0MPa, the conversion rate of isobutene can achieve 55-60%, and the conversion rate of C5 iso-olfin can achieve 35-40%; and under the reaction temperature of 85 DEG C and 8MPa, the conversion rate of isobutene can achieve 90-5-60%, and the conversion rate of C5 iso-olfin can achieve 60-65%. The catalyst can be repeatedly regenerated without secondary pollution.