摘要:
The invention discloses a catalyst and a method for cracking hydrocarbons. The catalyst comprises, calculated by dry basis, 10˜65 wt % ZSM-5 zeolite, 0˜60 wt % clay, 15˜60 wt % inorganic oxide binder, 0.5˜15 wt % one or more metal additives selected from the metals of Group VIIIB and 2˜25 wt % P additive, in which the metal additive is calculated by metal oxide and the P additive is calculated by P2O5. The method for cracking hydrocarbons using this catalyst increases the yield of FCC liquefied petroleum gas (LPG) and the octane number of FCC gasoline, as well as it increases the concentration of propylene in LPG dramatically.
摘要:
A process for producing an alkylene oxide by olefin epoxidation, wherein said process comprises the steps of: (1) in a first olefin epoxidation condition, in the presence of a first solid catalyst, a first mixed stream containing a solvent, an olefin and H2O2 is subjected to an epoxidation in one or more fixed bed reactors and/or one or more moving bed reactors until the conversion of H2O2 reaches 50%-95%, then, optionally, the resulting reaction mixture obtained in the step (1) is subjected to a separation to obtain a first stream free of H2O2 and a second stream containing the unreacted H2O2, and the olefin is introduced to the second stream to produce a second mixed stream, or optionally, the olefin is introduced to the reaction mixture obtained in the step (1) to produce a second mixed stream; (2) in a second olefin epoxidation condition, the reaction mixture obtained in the step (1) or the second mixed stream obtained in the step (1) and a second solid catalyst are introduced to one or more slurry bed reactors to conduct an epoxidation until the total conversion of H2O2 reaches 98% or more, with a proviso that said process for producing the alkylene oxide by olefin epoxidation has an selectivity for the alkylene oxide of 90% or more.The process of the present invention combines the slurry bed reactor with the fixed bed reactor and/or the moving bed reactor so as to overcome the disadvantages of the low conversion of H2O2 in the case that only the fixed bed reactor and/or the moving bed reactor are used, and the low selectivity for the target alkylene oxide in the case that only the slurry bed reactor is used.
摘要翻译:一种通过烯烃环氧化生产烯化氧的方法,其中所述方法包括以下步骤:(1)在第一烯烃环氧化条件下,在第一固体催化剂存在下,将含有溶剂,烯烃和H 2 O 2的第一混合物流 在一个或多个固定床反应器和/或一个或多个移动床反应器中进行环氧化,直到H 2 O 2的转化率达到50%-95%,然后,任选地,将在步骤(1)中获得的所得反应混合物 以分离以获得不含H 2 O 2的第一物流和含有未反应的H 2 O 2的第二物流,并将烯烃引入第二物流以产生第二混合物流,或任选地将烯烃引入到 步骤(1)以产生第二混合流; (2)在第二烯烃环氧化条件下,将步骤(1)中获得的反应混合物或步骤(1)中获得的第二混合物流和第二固体催化剂引入一个或多个淤浆床反应器中进行环氧化 直到H 2 O 2的总转化率达到98%以上,条件是通过烯烃环氧化生产环氧烷烃的方法对环氧烷烃的选择性为90%以上。 本发明的方法将淤浆床反应器与固定床反应器和/或移动床反应器结合,以克服在只有固定床反应器和/或移动床的情况下H 2 O 2转化率低的缺点 使用反应器,在仅使用浆料床反应器的情况下对目标烯化氧的选择性低。
摘要:
A noble metal-containing titanosilicate material, characterized in that said material is represented with the oxide form of xTiO2.100SiO2.yEOm.zE, wherein x ranges from 0.001 to 50.0; (y+z) ranges from 0.0001 to 20.0 and y/z
摘要:
A process for producing ethylene from ethanol combining the catalytic conversion of hydrocarbons: an ethanol feedstock is contacted with a Y-zeolite containing catalyst to give a product stream, and a coked catalyst and an target product of ethylene are obtained after separating the reaction stream; a hydrocarbon feedstock is contacted with a Y-zeolite containing catalyst to give a product stream, a spent catalyst and an oil vapor are obtained after separating the reaction stream, and the oil vapor is further separated to give the products such as gas, gasoline and the like; a part or all of the coked catalyst and a part or all of the spent catalyst enter the regenerator for the coke-burning regeneration, and the regenerated catalyst is divided into two portions, wherein one portion returns to be contacted with the hydrocarbon feedstock, and the other portion, after cooling, returns to be contacted with ethanol feedstock. This process not only reasonably utilizes the excessive thermal energy of the hydrocarbon conversion, but also solves the problem of heat supply for the conversion of ethanol, thus ensuring the continuous catalytic conversion of ethanol and generating enormous economic benefits. For the catalytic conversion of the ethanol, the content of ethylene is 95 vol % or more in the gas product; and the conversion of ethylene is not less than 99%. For the catalytic conversion of the hydrocarbons, the yield for the light olefins increases slightly by at least 2 mol %.
摘要:
A catalyst for converting hydrocarbons includes, based on the weight of the catalyst, 1-60% by weight of a zeolite, 0.1-10% by weight of an assistant catalytic component, 5-98% by weight of a thermotolerant inorganic oxide, and 0-70% by weight of a clay in terms of the oxide. The zeolite is a MFI-structured zeolite-containing phosphor and transition metal(s) or a mixture of the zeolite and a macroporous zeolite, which comprises, based on the weight of the mixture, 75-100% by weight of said MFI-structured zeolite containing phosphor and transition metal(s) and 0-25% by weight of the macroporous zeolite. In terms of the mass of the oxide, the MFI-structured zeolite containing phosphor and transition metal(s) has the following anhydrous chemical formula: (0-0.3)Na2O.(0.3-5.5)Al2O3.(1.0-10)P2O5.(0.7-15)M1xOy.(0.01-5)M2mOn(0-10)RE2O3.(70-97)SiO2 I or (0-0.3)Na2O.(0.3-5)Al2O3.(1.0-10)P2O5.(0.7-15)MpOq.(0-10)RE2O3.(70-98)SiO2 II The assistant catalytic component is one or more selected from the group consisting of the alkali earth metals, Group IVB metals, non-noble metals of Group VIII, and rare earth metals of the Periodic Table of the Elements. This catalyst has a higher ability to convert petroleum hydrocarbons and higher yields for propylene, ethylene, and light aromatics.
摘要:
This invention relates to a composition with desulfurization property, in which the desulfurization component is a kind of molecular sieves with incorporation of vanadium into the skeleton. The composition has high hydrothermal stability and the vanadium is hard to lose.
摘要:
A noble metal-containing titanosilicate material, characterized in that said material is represented with the oxide form of xTiO2.100SiO2.yEOm.zE, wherein x ranges from 0.001 to 50.0; (y+z) ranges from 0.0001 to 20.0 and y/z
摘要:
The present invention relates to a titanium-silicalite (TS-1) molecular sieve and the method for preparation of the same, wherein each crystallite of said titanium-silicalite molecular sieve has a hollow cavity with a radial length of 5-300 nm. The benzene adsorption capacity of the molecular sieve determined at 25° C. and P/P0=0.10 for 1 hour is at least 70 mg/g; and the method for preparation of said molecular sieve comprises an acid-treatment and then an organic-base treatment of the synthesized TS-1 molecular sieve, or only an organic-base treatment. The TS-1 molecular sieve of the present invention has a relatively high reactivity and activity stability in the catalytic oxidation.
摘要:
The present invention discloses a phosphorus-containing zeolite having MFI type structure. The anhydrous composition (based on the mole ratios of oxides) of the above zeolite is0.01-0.3Na.sub.2 O.Al.sub.2 O.sub.3.0.2-1.5P.sub.2 O.sub.5.30-90SiO.sub.2Said zeolite possesses a X-ray diffraction pattern listed in Table 1. The pore volume ratio of 1.0-10 nm mesopore to 10-membered ring pore is no less than 0.5. The crystal particle size of said zeolite is in the range of 0.8-2.0 micron. Said zeolite exhibits superior hydrothermal stability in catalytic conversion of hydrocarbons. Especially, when said zeolite is applied in catalytic cracking of hydrocarbons, it will enhance the crackability of large molecules, improve gasoline octane value and stability, and reduce the sulfur content in the gasoline as well.
摘要:
A process for producing light olefins and aromatics, which comprises reacting a feedstock with a catalytic cracking catalyst in at least two reaction zones, wherein the reaction temperature of at least one reaction zone downstream of the first reaction zone is higher than that of the first reaction zone and its weight hourly space velocity is lower than that of the first reaction zone. The spent catalyst is separated, from the reaction product vapor, regenerated, and then returned to the reactor. The reaction product vapor is separated to obtain the desired products, light olefins and aromatics. This process efficiently produces light olefins such as propylene, ethylene, etc from heavy feedstocks, wherein the yield of propylene exceeds 20% by weight, and produces aromatics such as toluene, xylene, etc at the same time.