79results about How to "Improve heterogeneous performance" patented technology

The present invention provides one-section hydrogenation process for producing food level white oil. By using vacuum gas oil, deasphalted solvent oil and Fischer-Tropsch process oil as material, and hydrogenating catalyst containing modified beta-molecular sieve in 1-9 wt%, and through hydrocracking or hydrogenating, hot high pressure separating out gas and light distillate to obtain liquid product, mixing with newly formed hydrogen, and high pressure hydro-finishing in a reactor with loaded reduction type hydrogenating catalyst, food level white oil is produced. The process is simple and has high product quality.

The invention relates to a method for hydrogenating naphthenic base distillate to produce lubricating oil basic oil. The naphthenic distillate is used as raw material and a one-stage in series hydrogenation process of hydrotreating-hydrodewaxing-hydrofinishing is adopted to produce the lubricating oil basic oil. Ordinary hydrotreating catalysts are filled in the upper part of a hydrotreating reaction area, and hydrotreating catalysts containing modified zeolites are filled in the lower part of the hydrotreating reaction area. The hydrodewaxing and hydrofinishing reaction areas are the same as those of the prior art, and are filled with hydrodewaxing catalysts and hydrofinishing catalysts. Compared with the prior art, the method disclosed by the invention has the advantages that system energy consumption is reduced, the pour point of a product is properly reduced, and the stability of the product is effectively improved.

The invention discloses a preparation method of a hydrocracking catalyst carrier. The preparation method comprises the following steps: mixing and kneading beta molecular sieve, SBA-15 molecular sieve, amorphous silica-alumina and a binder for molding to prepare the hydrocracking catalyst carrier; the beta molecular sieve is prepared as follows: adopting a specific acid-base precipitation method to prepare an amorphous silica-alumina precursor, then adding water, a silicon source and a template agent to obtain a silica-alumina gel, and after two-step dynamic crystallization, preparing the beta molecular sieve by ammonium salt exchange and template release agent treatment. The hydrocracking catalyst carrier adopts the beta molecular sieve and the SBA-15 molecular sieve with high crystallinity, high Si / Al ratio and good stability as acidic components, and hydrocracking catalysts prepared by the hydrocracking catalyst carrier have the advantages of high activity, high middle oil selectivity and good product quality.

The invention discloses an improved diesel oil hydrocracking catalyst carrier and a preparation method thereof. Raw materials of the carrier comprise the following components in percentages by weight: 3-35% of a molecular sieve, 5-75% of gamma-Al2O3, 15-75% of amorphous silica-alumina and 7-40% of an adhesive; the specific surface area of the carrier is 200-450m<2> / g, and the total pore volume is 0.35-0.75cm<3> / g. In a process of preparing a molecular sieve and aluminum oxide compound material, the molecular sieve without a template is added. In a mixed liquid, NH4<+> generated by ammonia salt and ammonia water and alkali Na<+> balancing negative charges of a molecular sieve framework exchange; in a roasting process, an organic template in the molecular sieve and NH4<+> are removed, so that ammonium exchange and template removal of a zeolite molecular sieve in a process of preparing the compound material are realized without independently using the molecular sieve for ammonium exchange and template removal. The template plays supporting and protecting roles on a dust structure of the molecular sieve. The hydrocracking catalyst carrier prepared by the carrier can remarkably reduce the condensation point of a diesel fraction and improve the cetane number of the diesel oil on the premise of guaranteeing a high yield of diesel oil.

The invention provides a Web communication data transmission method, a server, a client and a system. The method includes the following steps that: after a communication request sent by a client is received, a source data to be transmitted is decomposed into n data blocks, and the lengths of the n data blocks are sequentially recorded according to a decomposition sequence, so that a first label can be obtained, the n data blocks are combined multiple times according to a preset confusing algorithm, so that a plurality of heterogeneous data can be obtained, and the lengths of the n data blocksare sequentially recorded according to a combination sequence, so that a plurality of second labels which are in one-to-one correspondence with the plurality of heterogeneous data are obtained; the first label, the heterogeneous data, and the second labels are stored and sent to the client, so that the client can perform analysis according to the first label, the heterogeneous data, and the secondlabels to obtain the source data to be transmitted. According to the Web communication data transmission method, the server, the client and the system of the invention, the local uncertainty and heterogeneity of Web communication data encryption are enhanced, so that attack difficulty can be improved, and therefore, the high security and high reliability of the communication of the Web service system can be ensured.

The invention discloses a preparation method for a hydrocracking catalyst and a preparation method thereof. The catalyst comprises a carrier and a hydrogenation active metal component. The carrier comprises a beta molecular sieve, amorphous silicon aluminum and an adhesive. The beta molecular sieve has the properties that a mol ratio of SiO2 to Al2O3 is 60 to 100; a specific surface area is 505 to 850 m<2> / g; a pore volume is 0.35 to 0.60 mL / g; and relative crystallinity is 100 to 148%. After hydro-thermal treatment by water vapor, the relative crystallinity of the beta molecular sieve is 95% or above. According to the invention, the beta molecular sieve with high crystallinity, a high silica-alumina ratio and good stability is used as an acidic component of the carrier and matched with amorphous silicon aluminum; and the hydrocracking catalyst prepared from the carrier is especially applicable to one-stage tandem hydrocracking process and has the characteristics of high activity, good medium oil selectivity and good product properties.

Production of hydrogenated and pour-point reducing modified isomerization diesel oil is carried out by using fraction oil as raw material from one-stage or series process flow, passing fraction oil raw material and hydrogen gas into catalyst bed which consists of beta molecular sieve 1-9wt%, and obtaining clean high-quality diesel product and naphtha product with low sulfur nitrogen and high arene content. The beta molecular sieve has small crystal grain, low acidity, high silica-alumina ratio and crystallinity. It achieves simple process, higher productivity and less impurities, and improves density and freezing point.

The invention discloses a catalyst for preparing base oil by isodewaxing hydrocracking tail oil and a preparation method of the catalyst, and belongs to the field of catalytic materials. The preparation method comprises the following steps: firstly, carrying out ball milling on two different types of molecular sieves by using a ball mill, then adding oxides or metal salts containing VIII B group metal elements for ball milling, and finally kneading, extruding, drying and roasting to prepare the isodewaxing catalyst. The molecular sieves are fully mixed, agglomeration among the molecular sieves is reduced, the surface area of the molecular sieves is increased, and the metal elements and the molecular sieves are chemically associated through ball milling, so that the synergistic effect between acid and metal in the catalyst is improved, and the dehydrogenation / addition activity of the catalyst is ensured. Therefore, the isodewaxing catalyst prepared by the invention has high conversion rate and selectivity.

The invention discloses a beta molecular sieve and a preparation method thereof. According to the method, after a crystallized beta molecular sieve slurry directly undergoes ammonium exchange and a template agent removal treatment, first a hydrothermal treatment is conducted, and then an aluminum salt solution treatment is carried out, so that part of non-framework aluminum can be removed uniformly under the condition of maintaining a high beta molecular sieve crystallinity. Thus, the obtained beta molecular sieve can has the characteristics of high silicon-aluminum ratio, large specific surface area, appropriate acidity and acid distribution, and reasonable pore structure, etc., and especially has a suitable cracking effect and a very good isomerization effect on long-chain alkane and the long side chain alkyl of aromatic hydrocarbon and cyclane. A hydrocracking catalyst prepared from the beta molecular sieve can substantially reduce the condensation point of diesel oil fraction while maintaining a high diesel oil yield, thus achieving the effect of increasing the yield of low condensation point diesel oil.

The invention discloses a lightweight encryption hijacking attack detection system based on deep learning, and relates to the field of computer network security. Comprising two parts of model training and deployment detection. Aiming at the defects of an existing detection system, a deep learning technology is used for carrying out classification detection on a mining program converted into an image. According to the method, the malicious code vectorization technology is used, the semantic features of the mining program are added into the picture, and higher classification precision is achieved. Meanwhile, good isomerism is guaranteed, and mining programs written by two mainstream languages (JavaScript and WebAssessment) can be detected at the same time. The method can be deployed to a campus or enterprise gateway to monitor and detect daily traffic. And adding the detected domain name on which the malicious mining script is mounted into a blacklist database. The detection system provided by the invention plays a crucial role in network defense of campuses and enterprises, and has positive significance in real-time detection and defense of encryption hijacking attacks.