55results about How to "Excellent isomerization performance" patented technology

The present invention discloses a normal paraffin isomerization catalyst and its appliation. Said catalyst contains heteropolyacid or heteropolyacid salt whose weight ratio is 0.5-90%, and the described heteropolyacid or heteropolyacid salt is the heteropolyacid or heteropolyacid salt or its its mixture whose centre atom is P or Si and coordination atom is at least one element of W, Mo and V. Said catalyst can be used for isomerization of C4-C12 normal paraffins, specially for isomerization of n-butane. Said catalyst has good reaction property, stability, activity and selectivity.

The invention relates to a hydrofining catalyst of diesel oil, comprising a carrier and active constitutes. The active constitute is one or more of the VIB group metals and the VIII group metals, wherein, the carrier is composed of one or more of SAPO-5, SAPO-11, ZSM-22 and ZSM-23 molecular sieves which have one-dimensional pore canals, and gamma-Al2O3. The invention further discloses a preparation method of the catalyst on the basis of disclosing the hydrofining catalyst of diesel oil. The hydrofining catalyst prepared by the method in the invention can prevent the diesel oil distillates from cracking, realize the aromatics hydrogenation saturation of poor quality diesel oil, and simultaneously effectively realize the desulfuration and denitrification of poor quality diesel oil.

The invention relates to a preparation method of a multistage pore canal SAPO-11 (silicoaluminophosphate-11) molecular sieve and application thereof in gasoline modification. The preparation method comprises the following steps of: uniformly mixing alkylated organic phosphonic acid and deionized water, and sequentially adding phosphoric acid, an aluminum source, a template agent and a silicon source to obtain a mixed solution; carrying out crystallization, separating, washing and drying a solid product to obtain raw multistage pore canal SAPO-11 molecular sieve powder; and sintering to obtain the multistage pore canal SAPO-11 molecular sieve. In the invention, by introducing the amphiphilic alkylated organic phosphonic acid into a conventional SAPO-11 molecular sieve synthesis system and adjusting the chain length and the addition quantity of the alkylated organic phosphonic acid, the pore diameter of the molecular sieve is adjusted. The surfaces of an SAPO-11 molecular sieve product prepared with the preparation method is formed by small crystal grains, contains rich mesopore canals and has larger specific surface area and pore volume.

The invention discloses a preparation method of a Y-MOR composite molecular sieve, which comprises the following steps: properly treating mordenite with an alkaline solution to serve as a structural guide agent; and mixing Y-type molecular sieve, inorganic alkali and water, sequentially adding the structural guide agent, aluminum source and silicon source, and carrying out hydrothermal crystallization to obtain the Y-MOR composite molecular sieve. The synthetic raw materials used by the method are conventional inorganic materials without any toxic or harmful substance; the whole preparation process is green and environment-friendly; and the operation steps are simple and easy to implement.

The invention relates to a method for selective hydrocracking of light oil. A catalyst used in the method comprises an acidic carrier and metal oxides NiO and WO3, wherein the acidic carrier comprises two porous beta/Y composite molecular sieves and a mesoporous amorphous silicon/aluminum, and the metal oxides are loaded on the acidic carrier; the two porous beta/Y composite molecular sieves are used for ammonium exchange and organic acid pretreatment, and the two treatment methods are carried out in one process; ammonium salt used in the ammonium exchange is NH4NO3 or NH4HCO3, and the mass ratio of the beta/Y composite molecular sieves and the ammonium salt solution is (1-10):1; the solution of one or mixture of any of citric acid, tartaric acid, acetic acid, malic acid and oxalic acid is used for treatment of the beta/Y composite molecular sieves, and the concentration of the organic acid in the treatment system is 0.5-2.0 mol.L-1; the potential content of aromatic hydrocarbon in heavy naphtha in products obtained in cracking is high, and the exhaust oil has a lower BMCI (Bureau of Mines Correlation Index) value.

A modified alumina composition used as the matrix of cracking catalyst to increase the content of isoalkane in gasoline contains alumina (80-99.5 Wt%) and silicon oxide (0.5-20 Wt%). Its preparing process includes such steps as adding the alkaline aqueous solution of silicate to the aqueous solution of Al salt for regulating pH value until gel is generated, heating the gel to 45-95 deg.C, ageing, filtering and washing.

The invention relates to a hydro-upgrading catalyst for diesel oil with high content of aromatic hydrocarbons, and a preparation method and application thereof. The catalyst comprises, by weight, 20 to 65% of a composite molecular sieve, 10 to 50% of alumina, 10 to 30% of VIB-group metal (in terms of oxide) and 3 to 8% of VIII-group metal (in terms of oxide), wherein the composite molecular sieve is composed of a small-grain modified Y molecular sieve and a SAPO-11 molecular sieve in a weight ratio of 2: 1 to 10: 1. The invention also discloses a preparation method for the small-grain modified Y molecular sieve. The preparation method comprises the following step: successively subjecting a raw material, i.e., a small-grain high-silica-alumina-ratio NaY molecular sieve with a SiO2/Al2O3 mol ratio of 6.0 to 7.0, to primary ammonium exchanging, primary hydro-thermal treatment, secondary ammonium exchanging, secondary hydro-thermal treatment and primary acid treatment. With the catalyst prepared in the invention, high liquid product yield is obtained, and diesel oil with high content of aromatic hydrocarbons can be used for production of low-sulfur olefin-free high-octane-number gasoline and ultra-low-sulfur clean diesel oil.

The invention discloses a synthesis method of a BETA-MOR composite molecular sieve, which comprises the following steps: treating mordenite with an alkaline solution to serve as a structural guide agent; mixing inorganic alkali, silicon source, aluminum source and water to obtain a silicon-aluminum gel; and adding the structural guide agent, adding a BETA molecular sieve, and carrying out hydrothermal crystallization to obtain the BETA-MOR composite molecular sieve. The synthetic raw materials used by the method are conventional inorganic materials without any expensive template agent; the whole preparation process is green and environment-friendly; and the operation steps are simple and easy to implement.

The invention relates to a preparation method of a hydroisomerization/cracking catalyst. The method includes the following concrete steps: treating a potassium type or sodium type ZSM-22/ZSM-23 composite molecular sieve containing a template with an alkali solution of a certain concentration; washing an obtained product with deionized water and drying and roasting to remove the template; exchanging by using an ammonium nitrate solution, filtering, washing with deionized water, and drying and roasting to prepared a hydrogen type ZSM-22/ZSM-23 composite molecular sieve; mixing kneading, formingand roasting the hydrogen type ZSM-22/ZSM-23 composite molecular sieve, amorphous oxides and an acid solution to prepare a carrier; and immersing the carrier into an aqueous solution of soluble saltscontaining active components, and then drying and roasting to prepare the catalyst. Compared with a catalyst used by the prior art, the catalyst provided by the invention has better catalytic activityand target product selectivity in a hydroisomerization conversion process of Fischer-Tropsch synthetic wax.

The invention provides a Beta-Y composite molecular sieve. The Beta-Y composite molecular sieve has the following two crystal forms at the same time: a Y type molecular sieve and a Beta molecular sieve. The invention also provides a synthetic method for the Beta-Y composite molecule sieve. The synthetic method comprises the following steps: (1) preparing a Y structure-directing agent; (2) adding the Beta molecular sieve into a glucose solution for pretreatment; (3) mixing a silicon source, an aluminum source, inorganic base and water and adding the Y structure-directing agent; and (4) adding the treated Beta molecular sieve under stirring, carrying out crystallization and then carrying out separating, washing, drying and roasting so as to obtain the Beta-Y composite molecular sieve. According to the invention, glucose is introduced into the micro pore channels of the Beta molecular sieve and becomes carbon after roasting; the carbon occupies the pore channels of the Beta molecular sieve to prevent alkali from entering the interior of Beta molecular sieve crystals, so the Beta molecular sieve is not destroyed in the process of crystallization and the integrity of crystal structure is maintained, which are beneficial for improvement of the physical and chemical properties and the catalytic activity of the Beta-Y composite molecular sieve.

The invention discloses light-hydrocarbon isomerization catalyst and a method for preparing the light-hydrocarbon isomerization catalyst. Resin ribbon ball-shaped active carbon having high specific surface area and a micro-hole structure serves as the carrier, is roasted under high temperature and is activated through hydrogen fluoride to obtain a carrier with high specific surface area and a mesoporous structure, palladium loading is then carried out according to a liquid phase deposition method, and modifying is carried out through fluorine-containing chlorides at the same time to obtain the light-hydrocarbon isomerization catalyst. The light-hydrocarbon isomerization catalyst has extremely large specific surface area and a proper hole structure, and has good isomerization performance after modifying is carried out through the fluorine-containing chlorides. High activity of the light-hydrocarbon isomerization catalyst can still be kept after long-period operation and the light-hydrocarbon isomerization catalyst is long in service life.

The invention designs and prepares a non-noble bimetal supported catalyst suitable for preparing biological aviation kerosene through grease hydro-conversion, and the non-noble bimetal supported catalyst is applied to palm oil hydrodeoxygenation and cracking/isomerization reaction to produce biological aviation kerosene in a C8-C16 hydrocarbon range. According to the bimetal supported catalytic material prepared by taking nickel as a main metal, adding a second transition metal and supporting the nickel on an acidic carrier in an alkali liquor precipitation manner, the metal is highly dispersed on the surface of the carrier, the hydrodeoxygenation performance of the catalyst is greatly improved, and in hydrodeoxygenation and cracking isomerization reactions of palm oil, the grease conversion rate reaches up to 100%, and the grease conversion rate reaches up to 100%. The yield of the biological aviation kerosene can reach 60%, and the carbon loss is reduced, so that the method has a good application prospect in a process for producing the biological aviation kerosene through oil hydrogenation conversion.

The invention provides a mordenite-Beta molecular sieve-Y molecular sieve composite material and a synthesis method thereof. The mordenite-Beta molecular sieve-Y molecular sieve composite material contains a Y molecular sieve, a Beta molecular sieve and mordenite, takes a Y molecular sieve as a core, and the Beta molecular sieve and mordenite as a shell, and the Beta molecular sieve and mordenite coexist in the shell. The synthesis method of the composite molecular sieve material comprises the following steps: performing ultrasonic and thermal treatment to the nano-beta molecular sieve, nanometer mordenite and the Y molecular sieve, then mixing the treated zeolite mixture with inorganic base, distilled water, a template agent, an aluminum source and a silicon source, and synthesizing the mordenite-Beta molecular sieve-Y molecular sieve composite material by adopting a vapor phase method. The MOR-Beta-Y molecular sieve composite material has more reasonable acid property and pore distribution, and higher catalysis performance can be provided.