49results about How to "Good hydrodesulfurization" patented technology

The invention discloses a combination method for producing high-grade lubricant base oil by hydrogenating hydrocracking tail oil. The combination method comprises the steps of: carrying out decompression and fractional distillation on the hydrocracking tail oil to obtain NO.4 base oil stock with end distillation point of less than or equal to 430 DEG C and NO.6 base oil stock with end distillation point of more than 430 DEG C; then by adopting a mode of switching feeding or a mode of respectively feeding, carrying out hydrogenated isodewaxing reaction and complement refining reaction together with hydrogen; firstly carrying out gas-liquid separation on the reaction product to obtain hydrogen-rich gas and low-distillate oil; feeding the low-distillate oil into an atmospheric and vacuum distillation device to obtain dry gas and high-grade lubricant base oil; mixing and feeding the hydrogen-rich gas and dry gas into a PSA (Pressure Swing Adsorption) purification unit for purifying and then recycling. The combination method is flexible in process flow, strong in raw material adaptability, good in product quality, and low in energy consumption, the produced base oil can achieve the requirement of API (American Petroleum Institute) II type and III type high-grade lubricant base oil, and the yield of the obtained API III type base oil is higher.

The present invention discloses one kind of catalyst for the hydrotreatment of heavy material oil and its preparation. The catalyst consists of fluorine 0.5-15 wt%, assistant M in oxide 1.0-30 wt%, VIB metal oxide 15-35 wt%, VIII metal oxide 2.0-10 wt% and alumina the rest. It features the simultaneous modification of catalyst carrier with both fluorine and assistant M, and this can not only regulate the physical and chemical property of catalyst but also avoid the loss of fluorine in the catalyst, which will lower the activity of the catalyst, corrode the downstream apparatus and pollute environment. The catalyst is used in hydrotreatment of heavy material oil and has excellent hydrodesulfurizing, hydrodenitrifying and arene saturating performance.

The invention discloses a method for preparing silicon-containing alumina, which comprises the following steps of: preparing modified clay, roasting original clay at high temperature, and reacting the clay with mixed acid, wherein the mixed acid is a mixture of strong acid and weak acid; performing a gelling reaction of aluminum-containing acid solution and alkaline solution in modified clay size, ageing, filtering, washing, drying, roasting and the like to prepare the silicon-containing alumina, or drying to prepare silicon-containing alumina dry glue without roasting. Compared with that prepared by the conventional method, the silicon-containing alumina prepared by the method has the advantages of large pore diameter, proper pore structure and the like, and can be used for preparing heavy oil or residual oil hydrotreating catalysts.

The invention discloses a preparation method of a silicon-containing alumina carrier. The preparation method comprises the following steps: mixing clay, which has been calcinated at a high temperature, with alumina or a precursor of alumina, orderly adding a weak alkali solution and a strong acid solution, carrying out a life-cultivating treatment in damp air, and then subjecting the life-cultivated material to processes of forming, drying, and burning so as to obtain the silicon-containing alumina carrier. In the preparation method, the weak alkali solution is added before the addition of the strong acid solution, and then a life-cultivating treatment is carried out so as to adjust the physical and chemical properties of the catalyst carrier, and finally a hydro-treatment catalyst, which has the advantages of reasonable pore structure and proper acidity, is obtained. The silicon-containing alumina carrier provided by the invention is especially suitable for being used as a carrier of a catalyst for heavy oil or residual oil hydro-treatment.

The invention discloses a hydrotreating catalyst and a preparation method thereof. The hydrotreating catalyst comprises a hydrogenation activity metal component, a vulcanizing agent, a carrier, and an organic compound, wherein the carrier is provided with double-peak pore diameter distribution. The organic compound in the catalyst can replace part of vulcanizing agent, has no need to be subjected to generation reaction of hydrogen sulfide and vulcanization reaction of the hydrogen sulfide and active metal during vulcanization, and is subjected to direct chain scission so as to generate metal sulfide, so that the problem of rapid temperature rise during a catalyst vulcanizing process is solved, and the on-stream time can be greatly reduced.

The invention relates to a high-activity heavy petroleum fraction hydroprocessing catalyst and a preparing method thereof. A method of using silica-alumina composite oxide modified by titanium as a carrier to prepare the catalyst is put forward, meso-porous silicon composite oxide prepared through a coprecipitation method is regarded as a substrate material, a synchronous method or a fractional step method is adopted to introduce titanium oxide, or titanium sulfate, or titanium tetrachloride, or N-propyl titanium, or isopropyl titanate or Tetraisobutyl Orthotitanate and the like into the silica-alumina composite oxide, so that a titanium-modified carrier which has a large specific area and a large pore volume is obtained, wherein the specific area of the carrier is 200-310 m<2> / g, and the pore volume is 0.5-1.2 ml / g. A solution impregnation technology is adopted in support of metal active components on the carrier, and the heavy petroleum fraction hydroprocessing catalyst has good hydro-desulfurization and hydro-denitrification activities in heavy petroleum fraction.

The invention relates to a sulfur-carrying hydrodesulfurization upgrading catalyst. On the basis of weight of the catalyst, content of a molecular sieve in the catalyst is 5-70wt%, VIB-family metal content is 2-10wt% calculated according to oxide, VIII-family metal content is 1-5wt% calculated according to oxide, sulfur content is 3-8wt%, content of a zinc-aluminum lamellar material prepared through non-constant pH alternate titration is 5-50%, and phosphorus content is 0-10wt% calculated according to oxide. The zinc-aluminum lamellar material in the catalyst has large specific surface area, and the sulfur-carrying hydrodesulfurization upgrading catalyst prepared by compositing the zinc-aluminum lamellar material with a molecular sieve material has good hydrodesulfurization and olefin-reducing performance.