52results about How to "Increase the degree of vulcanization" patented technology

The invention provides an aluminum oxide based hydrorefining catalyst as well as a preparation method and application thereof. The method comprises the following steps: 1, immersing active metal components into an aluminum oxide carrier, and drying and roasting to obtain an active metal component loaded catalyst; and 2, introducing an organic complexing agent into the active metal component loaded catalyst and drying to obtain the aluminum oxide based hydrorefining catalyst, wherein the aluminum oxide carrier comprises delta-Al2O3 or theta-Al2O3. The aluminum oxide based hydrorefining catalyst provided by the invention can be used for FCC diesel oil so that the yield of the FCC diesel oil is higher than 99%, the content of sulfur is lower than 10ppm, and China 5 standard requirements are met.

The present invention discloses a preparation method for a vulcanization type hydrogenation catalyst. The preparation method comprises: uniformly mixing a carrier precursor, a thiomolybdate and/or thiotungstate, a nickel salt and/or a cobalt salt, adding a binder to carry out kneading, carrying out molding, and then carrying out drying and calcination in the protection of an inert gas to prepare the catalyst. The method of the present invention has characteristics of simple process and high vulcanization degree, wherein the prepared vulcanization type hydrogenation catalyst has high activity and high selectivity.

The invention relates to a sulfuration method for a hydrogenation catalyst, comprising the following steps of: after only drying the catalyst which hangs and carries an active component to remove free water in the catalyst, sulfurizing directly in a hydrogenation reactor, that is, straight-distilling naphtha or kerosene, adding carbon bisulfide which occupies 2 percent of the mass of the catalyst to prepare sufurized oil; after mixing the sufurized oil with the hydrogen, entering to a hydrogenation reactor while rising the temperature by a heat exchanger, keeping the temperature of the hydrogenation reactor at the decomposition and sulfuration temperature of the catalyst, controlling strictly the rate of temperature rise and preventing the catalyst bed layer from overheating, wherein the decomposition and sulfuration temperature zone of the catalyst is kept between 150 and 450 DEG C, and the rate of temperature rise is kept between 10 and 30 DEG C/h; after the ending of the decomposition and sulfuration of the catalyst, the system program lowers the temperature so as to control the rate of the temperature fall to be between 25h and 45 DEG C/h, when the temperature is lowered to be the normal reaction temperature of the catalyst, the sufurized oil is shifted into raw material oil which requires the hydrofinishing treatment, thereby beginning the hydrogenation treatment, wherein the treated gasoline is controlled between 180 and 220 DEG C, and the treated diesel oil is controlled between 240 and 290 DEG C. The catalyst sufurized in the method carries out the hydrofinishing for oil products, which has excellent desulfurization effect and less impact upon octane value.

The invention provides an ultra-deep desulfurization catalyst, a preparation method thereof and an application of the catalyst. The preparation method of the desulfurization catalyst includes the steps: weighing ammonium paramolybdate and nickel acetate tetrahydrate, dissolving the ammonium paramolybdate and the nickel acetate tetrahydrate in glacial acetic acid and water mixed solution in a stirring manner; adding hydrazine sulfate and dissolving the hydrazine sulfate in a stirring manner; performing stirring reaction in a thermostatic water bath to obtain polyoxometallate after reaction; dispersing the polyoxometallate in water and performing ultrasonic treatment; adding aluminum oxide, uniformly stirring the materials and performing hydro-thermal decentralization loading in an autoclaveto obtain the desulfurization catalyst after reaction. The prepared desulfurization catalyst is good in dispersing performance and high in activity, ultra-deep desulfurization can be achieved, and desulfurization rate reaches up to 93.8%.

The invention discloses a preparation method of a vulcanization type catalyst. The method comprises: adopting a dipping solution containing a sulfide precursor of active metal Mo or W and an inorganic salt of Ni or Co to dip a needed catalyst carrier, and then conducting after-treatment under certain vacuum degree and temperature, thus obtaining the vulcanization type catalyst. The method can control vulcanization of the catalyst under an appropriate temperature in a startup activation process, thus avoiding untimely vulcanization of the active metal, release of a hydrogen sulfide gas and the consequent influence on equipment air tightness. Meanwhile, in the after-treatment process, redundant water in catalyst pores are removed to prevent excess water in recycle hydrogen from influencing the catalyst activity during activation and corroding equipment. The catalyst prepared by the method provided in the invention is applicable to preparation of a petroleum fraction hydrogenation catalyst.

The invention provides a hydrodeoxygenation method of bio-oil as well as a catalyst and a preparation method used thereby. The preparation method comprises: contacting a catalyst carrier dipped with active components with an oxygen-containing organic matter during the process of roasting the catalyst carrier dipped with the active components, completing the roasting to obtain an oxidized catalyst; vulcanizing the oxidized catalyst to obtain the product, wherein the active components comprise at least one or more of VIB group metals, one or more of VIII group metals, and one or more of VB group metals. By preprocessing the catalyst with the oxygen-containing organic matter, the selectivity of hydrogenated decarboxylation and decarbonylation reaction is increased; the sulfur fixation performance and thermal stability of the catalyst are improved.

The invention discloses a preparation method of a roasting-free pre-vulcanized hydrogenation catalyst. The method comprises the steps that the environment-friendly dipping technology is adopted for preparing the hydrogenation catalyst, after the dipped catalyst is treated under the temperature of 180-250 DEG C, an organic solvent, elemental sulfur and auxiliaries are added to be mixed to be uniform, and thermal treatment is performed to obtain the roasting-free pre-vulcanized hydrogenation catalyst. The method solves the problems that a conventional catalyst is low in activity, poor in dispersity, long in vulcanization on-stream time and high in operation cost, and meanwhile overcomes the defects that the vulcanized catalyst preparation process is complex and concentrated heat release is easy. The pre-vulcanized hydrogenation catalyst prepared through the method is high in strength, good in activity and short in preparation process flow and has the good application value.

The invention provides a vulcanized hydrogenation catalyst, a preparation method therefor and application thereof. The preparation method for the vulcanized hydrogenation catalyst comprises the following steps: (1) preparing an oxidized hydrogenation catalyst, wherein the oxidized hydrogenation catalyst comprises a carrier, and a nitrogenous organic compound and an active metal oxide loaded on the carrier; the nitrogenous organic compound has at least one exothermic peak at 200-400 DEG C; and (2)in the presence of a curing media, successively increasing the temperature of the oxidized hydrogenation catalyst from a room temperature to the temperature corresponding to each exothermic peak of the organic alcohol compound at 200-400 DEG C at a rate of 1-20 DEG C/h; performing a constant temperature vulcanization for 1-5 hours; and finally increasing the temperature by 20-80 DEG C from the temperature corresponding to the highest temperature exothermic peak of a nitrogenous organic compound at 200-400 DEG C at the rate of 1-20 DEG C/h; and performing the constant temperature vulcanization for 1-5 hours. By adopting the preparation method provided by the invention, the degree of vulcanization of metals in the catalyst and the proportion of a two-layer-packed structure are improved, thus facilitating the improvement of the catalyst on hydrodesulfurization and hydrodearomatization activity.

The invention discloses a modified alumina carrier and a preparation method thereof. Based on the weight of the modified alumina carrier, the modifier A accounts for 2wt%-10wt% by element, the modifier B accounts for 3wt%-15wt% by oxide, and a group VIII metal sulfide accounts for 2wt%-10wt%; and the infrared acid amount at a temperature of 250-450DEG C is 0.18-0.55mmol/g. The preparation method comprises the following steps: (1) adding an aluminum source and a precipitant into a precursor aqueous solution containing a modifier A in parallel, carrying out precipitation reaction, carrying out hydrothermal treatment, and then performing filtering and drying to obtain modified pseudo-boehmite; (2) uniformly mixing the modified pseudo-boehmite with a peptizing agent and an extrusion aid, carrying out extrusion molding, and performing drying and roasting to obtain an alumina carrier; and (3) loading a VIII group metal onto the alumina carrier, and carrying out vulcanization treatment to obtain the modified alumina carrier. The modified alumina carrier has the characteristics of appropriate medium-strength acid amount, high B acid content, low L acid content, large pore size, centralized pore size and pore distribution and the like, and is suitable for the hydrogenation reaction process of aviation kerosene, diesel oil and coker naphtha.

The invention relates to the field of hydrotreating catalysts, and discloses a hydrotreating catalyst, a preparation method and applications thereof. The preparation method comprises: 1) impregnatingan alumina carrier with a sulfur-nitrogen-containing organic compound solution to obtain an impregnated product; 2) carrying out low-temperature drying treatment on the impregnated product obtained inthe step 1); and 3) impregnating the alumina carrier treated in the step 2) with an active component solution, and carrying out heat treatment, wherein the temperature of the low-temperature drying treatment is 15-180 DEG C, and the temperature of the heat treatment is 180-550 DEG C. According to the present invention, the catalyst prepared by the method has good matching between the dispersion degree and the sulfurization, and more active sites are generated, such that the intrinsic activity of the catalyst is easily improved; and the preparation method is simple, and the production cost islow.

The invention provides a bio-oil hydrodeoxygenation method, which comprises the following steps that a hydrodeoxygenation catalyst is used as a reaction catalyst; bio-oil is subjected to hydrodeoxygenation treatment. A preparation method of the hydrodeoxygenation catalyst comprises the following steps of taking roasted catalyst carriers soaked with active ingredients; absorbing oxygen inorganic acid by the catalyst carriers; then performing vulcanization treatment to obtain a product, wherein the active ingredients are mainly formed by one or a plurality of kinds of VB group metals and one or a plurality of kinds of VIIB group metals. The inorganic acid is used for performing pre-treatment on the catalyst, so that the selectivity of the hydrogenation decarboxylation and decarbonylation reaction is improved; the sulfur fixation performance and the thermal stability of the catalyst are improved.

The invention provides a regeneration method of an deactivated hydrogenation catalyst. The regeneration method comprises the following steps: carrying out charking treatment on the inactivated hydrogenation catalyst; dipping the charked deactivated hydrogenation catalyst in a solution containing a hydroxyl and/or carboxyl chelated ligand compound; and carrying out microwave vacuum drying on the catalyst subjected to dipping treatment so that the deactivated hydrogenation catalyst then recovers the activity. According to the technical scheme, microwave vacuum drying is adopted, due to the factthat operation is carried out under the condition of air isolation, oxygenolysis cannot occur in the drying process even if the decomposition temperature of an organic additive is high, and the utilization rate of the organic additive is remarkably increased.

The invention provides a vulcanized hydrogenation catalyst, a preparation method therefor and an application thereof. The preparation method of the vulcanized hydrogenation catalyst comprises the following steps: (1) preparing an oxidized hydrogenation catalyst, wherein the oxidized hydrogenation catalyst comprises a carrier and an organic alcohol compound and an active metal oxide loaded on the carrier; the organic alcohol compound has at least one exothermic peak at 200-400 DEG C; and (2) in the presence of a curing media, successively increasing the temperature of the oxidized hydrogenation catalyst from the room temperature to a temperature corresponding to each exothermic peak of the organic alcohol compound at 200-400 DEG C at a rate of 1-20 DEG C/h; performing a constant temperature vulcanization for 1-5 hours; then increasing the temperature by 20-150 DEG C from atemperature corresponding to the highest temperature exothermic peak of the organic alcohol compound at 200-400 DEG C at the rate of 1-20 DEG C/h; and performing the constant temperature vulcanization for 1-5 hours. By adopting the preperation method provided by the invention, the degree of vulcanization of metals in the catalyst and the proportion of a three-layer-packed structure are improved, thus facilitating the improvement of the catalyst on hydrodearomatization activity.

The invention provides a hydrodeoxygenation method of bio-oil. The method includes the steps that a hydrodeoxygenation catalyst serves as a reaction catalyst, and hydrodeoxygenation treatment is conducted on the bio-oil; the preparation method of the hydrodeoxygenation catalyst includes the steps that in the process of calcinating a catalyst carrier soaked with active components, the catalyst carrier soaked with the active components is made to make contact with organic matter containing oxygen, and calcination is completed, so that a catalyst in an oxidation state is obtained; the catalyst in the oxidation state adsorbs inorganic acid, then sulfidizing is conducted, and a product is obtained; the active components are mainly composed of one of more types of VIB metal and one or more types of VIII metal. According to the method, the organic matter containing oxygen and inorganic acid are utilized to conduct pretreatment on the catalyst, selectivity of a hydrogenation decarboxylation decarbonylation reaction is increased, and sulfur fixation performance and heat stability of the catalyst are improved, so that the operation cycle of a device is prolonged.