30results about How to "Reduce cleavage reactions" patented technology

The present invention relates to a technological process for producing low-sulfur low-olefin clean gasoline by using catalytic cracked gasoline and catalyst used by said process. Said invention adopts hydrofinishing and aromatization combined process, in which the aromatization adopts small-grain hydrogen type molecular sieve catalyst including IA group metal, transition metal and lanthanide series rare-earth metal oxide, and the crystal grain size of the molecular sieve is in the range of 20nm-800 nm. Said invented catalyst can reduce cracking reaction and can raise the yield of the gasoline.

The invention discloses a method for hydrocracking inferior catalytic cracking diesel oil. In the method of the present invention, after mixing inferior diesel fuel with heavy hydrocracking raw materials, hydrocracking is first performed, and the obtained middle distillate is subjected to two-stage hydrocracking to obtain high-aromatic latent heavy naphtha and tail oil with low BMCI value. Since the middle distillate obtained in the first stage has been freed of impurities such as sulfur and nitrogen, the catalyst activity has been fully exerted, so it can be operated at a higher space velocity and lower temperature, even at a lower hydrogen partial pressure, which is economical Sex is improved. Moreover, the lower hydrogen partial pressure helps the middle distillate to convert into heavy naphtha with high aromatic potential, and the lower temperature reduces the further cracking of heavy naphtha, thereby greatly improving the yield of heavy naphtha.

The invention relates to a high-pressure-resistance abrasion-resistance dustproof capsule and a preparation process thereof. The dustproof capsule is prepared from the following raw materials in parts by weight: 85-90 parts of hydrogenated butadiene-acrylonitrile rubber, 15-20 parts of chlorinated butyl rubber, 5-10 parts of natural rubber, 5-10 parts of zinc oxide, 1-2 parts of magnesium oxide, 1-2 parts of stearic acid, 0.5-1 part of paraffin, 30-40 parts of N330 carbon black, 5-15 parts of N770 carbon black, 10-15 parts of white carbon black, 3-5 parts of solid coumarone resin, 1-2 parts of adhesive A, 2-3 parts of adhesive RS, 1-3 parts of accelerant NOBS, 1-3 parts of accelerant TMTD, 1-3 parts of accelerant CZ, 1-3 parts of sulfur, 1-3 parts of a vulcanizing agent, 1-2 parts of a co-curing agent HVA, 5-10 parts of TP759, 1-2 parts of an internal releasing agent and 3-5 parts of an antiaging agent. The dustproof capsule has the advantages of high pressure resistance and abrasion resistance.

The invention discloses a composite carrier catalyst for preparing propylene by adopting propane conversion and a preparation method for the composite carrier catalyst. The catalyst is prepared from 50%-90% of Al-doped SBA-15 molecular sieves, 10%-40% of iota-Al2O3, 0.1%-0.6% of an active component, 0.1%-4.0% of modifiers and the balance adhesive. The modifier comprises a first modifier containingany one of Cu and Sn modified elements, a second modifier containing any one of La, Ce, Ag and Zr modified elements, and a third modifier containing any one of Sr, Ba, Ca and K modified elements, thecontent of each modifier is greater than 0%, and the mass percentage sum of all the components is 100%. The catalyst is good in intensity, and has good dehydrogenation activity and stability in the process of propane dehydrogenation.

The invention discloses a paraffin hydrocarbon shape selective isomerization catalyst, a preparation method and application thereof. The catalyst comprises a rare earth-modified molecular sieve and a halogen-modified inorganic melting-resisting oxide and at least one VIII-family precious metal, wherein the molecular sieve is a TON type molecular sieve, the weight ratio of the rare earth-modified molecular sieve to the halogen-modified inorganic melting-resisting oxide is 10:90-90:10, in the catalyst, the content of the VIII-family precious metal is 0.1-10 percent by weight, in the rare earth-modified molecular sieve, the mass content of the rare earth oxide is 0.5-60.0 percent, and in the halogen-modified inorganic melting-resisting oxide, the mass content of the halogen is 0.1-20.0 percent. Compared with the prior art, the catalyst is especially suitable for a hydroprocessing process of lubricating oil distillate, and has the characteristics of high yield of a target product, low flow point and high viscosity index.

The invention relates to a reforming reactor and its application. By mixing hydrogen in stages and introducing lifting hydrogen and stripping hydrogen into different reactors, the H in the reforming reactor is reasonably adjusted. 2 / HC molar ratio, resulting in greatly improved aromatics and hydrogen yields compared to conventional prior art configurations. Compared with the prior art, the reforming reactor of the present invention adopts a radial reactor structure with side entry and ejection, which can effectively reduce the height of the reactor, solve the problem of waste of the top space of the reactor, and facilitate the central cylinder and For the inspection and maintenance of the fan-shaped cylinder, there is a catalyst collection bucket at the bottom of the reforming reactor, and hydrogen stripping is used. On the one hand, the hydrocarbon components carried on the catalyst can be stripped out, and at the same time, the lifting temperature of the catalyst is also reduced, which is conducive to safe operation and follow-up Material selection for equipment and pipelines.

The invention discloses an oil sludge treatment method. The treatment method comprises the following steps: oil sludge enters a drying unit for drying and dehydration, and after dehydration treatment, dewatered oil sludge and gas-phase materials are obtained; the dewatered oil sludge enters a pyrolysis reaction unit for pyrolysis reaction, and cracked gas is obtained after the reaction. , oil and coke; the gas-phase material obtains non-condensable gas and condensed water after heat exchange; the cracked gas and non-condensable gas enter the combustion unit, contact with the oxygen-containing atmosphere for combustion reaction, and use the hot flue gas generated by the reaction as the heat source as the drying unit And the pyrolysis reaction unit provides heating heat. The invention provides a sludge reduction, harmless and resourceful treatment method, which realizes the maximum reduction and resource utilization of sludge, and at the same time recovers high-value oil products without causing secondary pollution in the whole processing process.

The invention discloses a fixed-bed hydrogenation reactor and a heavy oil liquid-phase hydrogenation process. The hydrogenation reactor comprises an outer cylinder and an inner cylinder of the reactor, an annular area is formed between the outer cylinder and the inner cylinder, and the transverse direction of the inner cylinder is The cross-sectional area gradually increases from top to bottom, the inner cylinder wall is evenly opened and connected to the annular area, the top opening of the inner cylinder is flush with the bottom of the upper head of the reactor, and the bottom of the inner cylinder is tightly connected with the lower head of the reactor; A shell-and-tube ceramic membrane tube assembly is arranged at the bottom, the hydrogen supplementation pipeline is communicated with the ceramic membrane tube, and the liquid-phase feed pipeline is communicated with the inner cavity of the shell outside the ceramic membrane tube; the inner tube and the annular area are alternately arranged with baffles at different heights; The cylinder is filled with hydrogenation catalyst I, the annular region is filled with hydrogenation catalyst II, and the activity of hydrogenation catalyst I is higher than that of hydrogenation catalyst II. The method of the invention firstly performs viscosity reduction treatment on the heavy oil raw material, and then makes the material undergo hydrogenation reaction with different active catalysts alternately in the inner cylinder and the annular area along the flow channel arranged in the reactor, that is, the high activity and temperature rise in the early stage of the reaction can be controlled. It is a big problem, ensuring a high conversion rate in the middle of the reaction, reducing the deep cracking reaction in the high-temperature stage in the later stage of the reaction, and improving the liquid yield.

The invention discloses a propane dehydrogenation catalyst and a preparation method thereof. Chromium compound oxide is used as an active component, is mixed with a high-performance thermal carrier, is added with an adhesive and a modifying element, and then is mixed and kneaded, subjected to band extrusion, dried and roasted to prepare the catalyst. The propane dehydrogenation catalyst comprisesthe following components in percentages by mass: 55-80% of the chromium compound oxide, 10-30% of the high-performance thermal carrier, 0.1-10.0% of a modifying element and the balance of the adhesive. The dispersity of chromium on the carrier is improved by synthesizing the chromium compound oxide, and the effective utilization rate of the active component and the conversion rate of the raw material propane are increased effectively; by metal modification treatment, the activity and selectivity of the catalyst are improved, and then, the yield of propylene is increased; by high-temperature water vapor treatment, the acid content and the acid strength of the surface of the carrier are greatly reduced, and the coking and olefin cracking reaction of the catalyst is relived effectively; and by addition of the high-performance thermal carrier, the catalyst utilization efficiency is improved effectively, and the production load of the device is increased.

The invention discloses a heavy oil hydrogenation reactor and a hydrogenation method. The reactor consists of an outer cylinder of the reactor, an inner cylinder I and an inner cylinder II arranged along the axial direction of the reactor. The cross-sectional area of ​​the inner cylinder I gradually decreases from top to bottom, and the cross-sectional area of ​​the inner cylinder II gradually decreases from top to bottom. increase; an annular space is formed between the inner cylinder I, the inner cylinder II and the outer cylinder of the reactor; the inner cylinder I is filled with a hydrogenation catalyst I, and the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than Activity of Hydrogenation Catalyst II. The present invention reduces the viscosity of the material through the viscosity-reducing component installed in the inner cylinder II, and then passes through the inner cylinder I and the annular space to undergo a hydrogenation reaction, improves the driving force and reaction rate of the mass transfer process of the heavy oil liquid phase hydrogenation reaction, and controls the reaction between the reaction material and the hydrogenation reaction. The contact time of different active catalysts can slow down the coking of the catalyst surface, reduce the deep cracking reaction of light oil, and improve the liquid yield and heavy impurity removal conversion rate of heavy oil liquid phase hydrogenation reaction process.

The invention discloses a hydroisomerization catalyst and a preparation method thereof, and a method for producing base oil of lubricating oil from hydrocarbon oil or Fischer-Tropsch synthesis oil. The preparation method for the hydroisomerization catalyst comprises the following steps: (1) mixing amorphous silicon-aluminum, an alumina adhesive, nitric acid, an auxiliary agent and water so as to obtain a mixture and subjecting the mixture to mixing and kneading, extrusion molding, primary drying and secondary roasting so as to obtain a carrier precursor; (2) subjecting the carrier precursor to carrier modification in the presence of water vapor so as to obtain a modified carrier; (3) introducing a material containing an active component precursor to the modified carrier and carrying out secondary drying and secondary roasting so as to obtain a catalyst precursor; and (4) reducing the catalyst precursor in a hydrogen-containing atmosphere so as to obtain the hydroisomerization catalyst. The auxiliary agent used in the invention is nitrate and / or carbonate of alkali metals and / or alkaline earth metals. According to the invention, high yield of the isomerization product is realized; and the pour point of the product base oil of lubricating oil is reduced.