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

The present invention relates to an aromatization catalyst and production process of clean gasoline. Said invention adopts hydrofining and aromizing two-stage catalyst combined process to make the FCC gasoline with high sulfur content and high olefin content into clean gasoline. Said invented aromatization catalyst adopts small-grain molecular sieve catalyst, and makes the aromatization catalyst undergo the process of hydrothermal treatment and can make the strong acid quantity of said catalyst be reduced. Said invention can raise yield of gasoline, and can obtain high-quality clean gasoline product.

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 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 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 MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application. The catalyst comprises by weight, 10-90% of a modified MCM-22/ZSM-22 composite molecular sieve, and a group VIII noble metal active component. The modified MCM-22/ZSM-22 composite molecular sieve comprises, weight, 0.1-10% of silicon dioxide. MCM-22 molecular sieves in the MCM-22/ZSM-22 composite molecular sieve coat ZSM-22 molecular sieves and the MCM-22/ZSM-22 composite molecular sieve comprises, by weight, 1.0-50% of MCM-22. The catalyst can reduce the condensation point of the waxy raw material oil, improves a yield of the liquid product and has a high viscosity index of the lubricating base oil in lubricating oil fraction isodewaxing.

The invention discloses an isomerization catalyst, and a preparation method and an application thereof. The catalyst includes, by weight, 10-90% of an MCM-22/ZSM-23 compound molecular sieve, 0.1-5.0% of gallium oxide and 0.1-1.5% a group VIII precious metal, wherein the MCM-22/ZSM-23 compound molecular sieve is obtained through wrapping ZSM-23 molecular sieve with MCM-22 molecular sieve, and the weight content of the MCM-22 in the MCM-22/ZSM-23 compound molecular sieve is 1.0-50%. The catalyst reduces the condensation point of wax-containing raw oil, improves the yield of liquid products, and has the high viscosity index characteristic of lubricating oil base oil when especially used in the isodewaxing process of a lubricating oil fraction.

The invention relates to a reforming reactor and application thereof. Mixed hydrogen is subjected to subsection, lifted hydrogen and stripped hydrogen are respectively introduced in different reactors, the molar ratio of H2 to HC in the reforming reactor is reasonably adjusted, and therefore compared with the prior art, the yield of aromatic hydrocarbon and hydrogen is greatly increased. Comparedwith the prior art, the reforming reactor adopts a radial reactor structure with an inlet formed in the side and an outlet formed in the top, the height of the reactor can be effectively reduced, theproblem that the larger top space of the reactor is wasted is solved, and a center cylinder and a fanshaped cylinder can be conveniently maintained; a catalyst collecting hopper is arranged at the bottom of the reforming reactor, hydrogen is adopted for steam stripping, through steam stripping, hydrocarbon components carried by a catalyst can be obtained, the rising temperature of the catalyst isalso reduced, and the reforming reactor is beneficial for safe operation, subsequent equipment and material selection for pipelines.

The invention discloses an oil sludge treatment method which comprises the following steps: the oil sludge enters a drying unit to be dried and dehydrated, and dehydrated oil sludge and a gas-phase material are obtained after dehydration treatment; the dehydrated oil sludge enters a pyrolytic reaction unit to be subjected to a pyrolytic reaction, and pyrolysis gas, oil and coke are obtained afterthe reaction; heat exchange on the gas-phase material is performed to obtain non-condensable gas and condensed water; pyrolysis gas and non-condensable gas enter the combustion unit to be in contact with oxygen-containing atmosphere for a combustion reaction, and hot smoke generated by the reaction serves as a heat source to provide heating heat for the drying unit and the pyrolytic reaction unit.According to the oil sludge reduction, harmlessness and resourceful treatment method, reduction and resourceful utilization of the oil sludge are achieved to the maximum extent, meanwhile, high-valueoil products are recycled, and secondary pollution is avoided in the whole treatment process.

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 mesoporous molecular sieve catalyst and a preparation method thereof. The mesoporous molecular sieve catalyst comprises a matrix, an active component and a binder; the matrix is an H-type MSU-SMFI mesoporous molecular sieve; the active component is Na; and the binder is alumina. The preparation method comprises the following steps: 1, carrying out ion exchange of an MSU-SMFI mesoporous molecular sieve with an NH4NO3 solution, and roasting to obtain the H-type MSU-SMFI mesoporous molecular sieve; 2, carrying out ion exchange of the H-type MSU-SMFI mesoporous molecular sieve and an NaNO3 solution, adding the alumina binder and a nitric acid solution after the ion exchange, grinding, carrying out extrusion molding, and roasting; and/or 3, dipping the mesoporous molecular sieve obtained in step 2 in an aqueous solution containing at least one of a lanthanum salt and a zirconium salt, and drying and stoving. High olefin oligomerization activity and high diesel yield can be obtained through adopting the mesoporous molecular sieve MSU-SMFI as the matrix of an olefin oligomerization catalyst.

The invention discloses a heavy oil hydrogenation reactor and a hydrogenation method. The reactor comprises a reactor outer cylinder, an inner cylinder I and an inner cylinder II, the inner cylinder I and the inner cylinder II are arranged in the axial direction of the reactor, the cross sectional area of the inner cylinder I is gradually reduced from top to bottom, and the cross sectional area of the inner cylinder II is gradually increased from top to bottom; an annular space is formed among the inner cylinder I, the inner cylinder II and the reactor outer cylinder body; wherein the inner cylinder I is filled with a hydrogenation catalyst I, the annular space is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II. The viscosity of the material is reduced through the viscosity reduction assembly arranged in the inner cylinder II, and then the material sequentially passes through the inner cylinder I and the annular space to generate hydrogenation reaction, so that the mass transfer process driving force and reaction rate of heavy oil liquid phase hydrogenation reaction are improved, the contact time of the reaction material and different active catalysts is controlled, and catalyst surface coking is slowed down; the deep cracking reaction of the light oil is reduced, and the liquid yield and the heavy impurity removal conversion rate in the heavy oil liquid phase hydrogenation reaction process are improved.

The invention discloses a heavy oil hydrogenation process which comprises the following steps: (1) mixing hydrogen and a heavy oil raw material to obtain a first mixed feed; (2) the first mixed feed enters the shell side of the shell-and-tube inorganic membrane tube assembly from the bottom of the fixed bed reactor, and hydrogen is supplemented to enter the tube side to form a second mixed feed; and (3) enabling the second mixed feed to flow upwards into the upper cylinder, alternately carrying out hydrogenation reaction on the inner cylinder and the annular region under the action of a plurality of partition plates axially arranged in the inner cylinder and the annular region, and finally enabling a hydrogenation product to flow out from the upper part. The method solves the problem of large temperature rise in the early reaction stage of the heavy oil liquid phase hydrogenation process, ensures high conversion rate in the middle reaction stage, reduces the later deep cracking reaction, and improves the liquid yield.

The invention discloses a fixed bed hydrogenation reactor and a heavy oil liquid phase hydrogenation process, the hydrogenation reactor comprises a reactor outer cylinder body and an inner cylinder, an annular area is arranged between the outer cylinder body and the inner cylinder, the cross sectional area of the inner cylinder is gradually increased from top to bottom, and the cylinder wall of the inner cylinder is uniformly provided with holes communicated with the annular area; the top opening of the inner cylinder is flush with the bottom of a upper seal head of the reactor; the bottom of the inner cylinder is hermetically connected with a lower seal head of the reactor; a shell-and-tube ceramic membrane tube assembly is arranged at the bottom of the inner cylinder, a hydrogen supplementing pipeline is communicated with the ceramic membrane tube, and a liquid phase feeding pipeline is communicated with an in-shell cavity outside the ceramic membrane tube; partition plates are alternately arranged in the inner cylinder and the annular area at different heights; the inner cylinder is filled with a hydrogenation catalyst I, the annular area is filled with a hydrogenation catalyst II, and the activity of the hydrogenation catalyst I is higher than that of the hydrogenation catalyst II. According to the method, firstly, the heavy oil raw material is subjected to visbreaking treatment, and then the material is alternately subjected to hydrogenation reaction with different active catalysts in the inner barrel and the annular area along the flow channel arranged in the reactor, so that the problems of high activity and large temperature rise in the early stage of reaction can be controlled, and higher conversion rate in the middle stage of reaction is ensured; the deep cracking reaction in the later high-temperature stage of the reaction can be reduced, and the liquid yield is improved.