Sinopec Patente

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Disclosed in the present invention are a vanadium-based catalyst, and a preparation method therefor and the use thereof. The vanadium-based catalyst comprises a carrier and a vanadium-based active material loaded on the carrier, wherein the vanadium-based catalyst is of a strip-shaped structure having a multi-petal-shaped cross section, the number of petals in the multi-petal-shaped cross section is at least three, and there are at least two through holes in the strip-shaped structure in the direction of length thereof; and the shape factor of the vanadium-based catalyst is 70-110. The vanadium-based catalyst of the present invention can be used in a wet sulfuric acid process, and the catalyst is low in terms of filling amount, can achieve a relatively high SO<2> conversion rate and a relatively low bed pressure drop by means of a relatively low filling amount, is particularly applicable to the preparation of sulfuric acid by means of the cracking of waste acid in the case of a relatively high impurity content of a feed gas, and is greatly advantageous during long-period operation.

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The present invention relates to a process for the chemical conversion of a hydrocarbon stream. The chemical conversion process of the present invention comprises the steps of: providing a hydrocarbon stream comprising a paraffinic alkane represented by the following structural formula (I), converting at least a part of the paraffinic alkanes in a conversion reaction to C<2>-C<6> n-alkanes in the presence of a catalyst and hydrogen gas to obtain a converted product, wherein the catalyst comprises a molecular sieve and a non-noble metal hydrogenation active metal component, and steam cracking the converted product to obtain a cracked product comprising ethylene. <img class="EMIRef" id="cc7941ac-677e-4eee-91de-d2f62504fec9-ia01" /> in the structural formula (I), R is C<2>-C<6> linear or branched alkyl. According to the invention, low-quality ethylene raw materials can be effectively converted into high-quality ethylene raw materials, the yield of ethylene and triene of an ethylene device can be greatly improved by the hydrocarbon stream after hydrogenation conversion, the process is simple, the operation difficulty is low, and the process has good economic benefits.

The present invention relates to a process for improving the quality of a hydrocarbon stream. The process for improving the quality of a hydrocarbon stream according to the present invention comprises the steps of: providing a hydrocarbon stream containing C<5>-C<6> iso-alkanes, wherein the content of the C<5>-C<6> iso-alkanes in the hydrocarbon stream is 60-90 wt%, based on the total weight of the hydrocarbon stream being 100 wt%; converting at least a part of the C<5>-C<6> iso-alkanes in the presence of a catalyst and hydrogen by a conversion reaction into C<2>-C<6> n-alkanes, to obtain a conversion product, wherein the catalyst comprises a molecular sieve and a non-noble metal hydrogenation-active metal component; steam cracking the conversion product to obtain a cracking product comprising ethylene. According to the present invention, low-quality ethylene raw material can be effectively converted into high-quality ethylene raw material. The hydrocarbon stream after the hydro-conversion can greatly improve the yield of ethylene and the yield of triene of the ethylene device. Moreover, the process procedures according to the present invention was simple with low difficulty of operation, thus had very good economic benefit.

The present invention relates to a single-crystal hollow ZSM-5 zeolite. Particles of single-crystal hollow ZSM-5 zeolite have a single-crystal structure, exhibit hexagonal morphology, and have a double-layered cavity structure nested inside and out, wherein an inner-layered cavity is at least partially enclosed by a first wall layer of zeolite, and an outer-layered cavity is completely enclosed by a second wall layer of zeolite, and wherein a ratio of a length of crystal grain of the zeolite to a length of the outer-layered cavity is 1.1-2.0, and a ratio of a width of crystal grain of the zeolite to a width of the outer-layered cavity is 1.05-1.5. The present invention also relates to a preparation method and use of the single-crystal hollow ZSM-5 zeolite.

The present invention relates to a single-crystal hollow ZSM-5 zeolite, a catalyst comprising this zeolite, and their preparation methods and uses. The particle of said single-crystal hollow ZSM-5 zeolite has a single-crystal structure, an average crystal grain size of 0.8-3.5 µm, and has a double-layered cavity structure nested inside and out, wherein an inner-layered cavity is at least partially enclosed by a first wall layer of zeolite, and an outer-layered cavity is completely enclosed by a second wall layer of zeolite, and on the second wall layer of zeolite there is an epitaxially grown nano-rod shell layer. The single-crystal hollow ZSM-5 zeolite of the present invention can be used in deep catalytic cracking reaction of macromolecule, allowing to obtain higher yields of low-carbon olefins and BTX, as well as a higher ethylene/propylene ratio.

The present invention relates to the technical field of road asphalts, and disclosed are an asphalt additive, and an asphalt composition and a preparation method therefor. The asphalt additive contains a first microcapsule, a second microcapsule, and a third microcapsule, wherein the first microcapsule, the second microcapsule, and the third microcapsule each comprise a capsule core and a capsule wall, the capsule core is wrapped in the capsule wall, the capsule core contains an active component, the capsule wall thickness of the first microcapsule is 0.5-2 µm, the capsule wall thickness of the second microcapsule is greater than 2 µm and less than or equal to 3 µm, and the capsule wall thickness of the third microcapsule is greater than 3 µm and less than or equal to 5 µm. The asphalt composition of the present invention has a long storage and service life, and can effectively reduce the emission of asphalt fumes during construction, thereby reducing pollution to the environment.

A microcapsule, a preparation method therefor, and a use thereof. The microcapsule comprises a capsule core and a capsule wall. The capsule core is wrapped in the capsule wall. The capsule core contains an active component. The elastic modulus of the microcapsule and the thickness of the capsule wall satisfy the following formula: Y=0.42X<2>-0.92X+T, wherein Y is the elastic modulus of the microcapsule, and the unit thereof is GPa; X is the thickness of the capsule wall, and the unit thereof is µm; and T is 1±0.1. The elastic modulus of the microcapsule is obtained by performing a mechanical property test on the microcapsule by using a nano-indentation instrument. The thickness of the capsule wall is obtained by performing frozen section on the microcapsule by using a scanning electron microscope. The microcapsule is suitable for pavement asphalt, and the self-repairing efficiency of a pavement asphalt material can be effectively improved. In addition, in a process of asphalt construction, the emission of an asphalt flue gas can be effectively reduced and the pollution to the environment is reduced.

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A composite polyester fiber, a polyester fiber fabric comprising the composite polyester fiber, a fiber fabric carrier, a cell culture carrier, and preparation methods and uses thereof. The composite polyester fiber has a core-sheath structure; wherein the mass ratio of the core material to the sheath material is x, and 1.5 ≤ x ≤ 4; and the average diameter D of the composite polyester fiber is 10-40 µm. The polyester fiber fabric, the fiber fabric carrier or cell culture carrier made of the composite polyester fiber can improve the sugar metabolism capacity of cells when they are used for cell culture.

Disclosed are a graphene aerogel, a regenerated catalyst and the use thereof, and a method for regenerating a CO₂-rich amine solution. The B acid content of the graphene aerogel is 0.001-0.05 mmol/g, the specific surface area thereof is 40-200 m²/g, and the ratio of the volume of pores having a pore diameter of 20 nm or below to the total pore volume of the graphene aerogel is not smaller than 50%. The graphene aerogel is applied to a regenerated catalyst of a CO₂-rich amine solution, and is helpful in catalyzing the desorption of CO₂, reducing the initial temperature and finish temperature of desorption, increasing the desorption rate, shortening the desorption time, reducing the desorption energy consumption and increasing the desorption quantity.

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An SOEC module and an SOEC water electrolysis hydrogen production device based on a multi-stack-core module. Said device comprises a steam generator, a mixer, an air heater and a plurality of SOEC modules; each SOEC module comprises a heat preservation shell provided with a hot air module inlet, a hydrogen-containing mixed steam module inlet, an oxygen-rich air module outlet and a product crude hydrogen module outlet, and a plurality of electrolytic cell stack cores arranged in the heat preservation shell; and each electrolytic cell stack core comprises a hot air single-stack inlet, a hydrogen-containing mixed steam single-stack inlet, an oxygen-rich air single-stack outlet and a product crude hydrogen single-stack outlet.

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The present invention discloses a novel silicon-germanium molecular sieve SCM-41, a preparation method thereof, and use thereof. The SCM-41 molecular sieve has a unique X-ray diffraction pattern and shows good application prospects in terms of adsorption separation and catalytic conversion of organic compounds.

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The invention relates to the technical field of mechanochromic materials, and discloses use of polybenzimidazole as a mechanochromic material.

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A carbon dioxide absorbent, a preparation method therefor and a use thereof. The absorbent comprises a component A, a component B and a solvent, the component A being an imidazole-modified amino acid ionic liquid; a cation of the ionic liquid is an imidazole cation, the imidazole cation having a structure as shown in formula (I), where R1, R2, R3, R4 and R5 each independently being hydrogen or a C1-C10 straight-chain or branched alkyl; the anion of the ionic liquid is selected from sarcosine, lysine, valine or alanine; the component B is selected from aminoethylethanolamine, triethanolamine or N-methyldiethanolamine; the solvent is an aqueous solution of alcohol, the volume concentration of alcohol thereof being 5-15%. Use of the carbon dioxide absorbent in capturing carbon dioxide can improve selectivity and acid gas load during carbon dioxide capture, and reduce energy consumption.

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The invention relates to a three-phase separator and a fluidized bed reactor (100) including the three-phase separator. The three-phase separator includes: an outer housing (101); a central guide barrel (11); an outer guide barrel (2) disposed radially outside of the central guide barrel (11); an upper sealing baffle (4) extending radially between the central guide barrel (11) and the outer guide barrel (2) and being hermetically connected with a top end of the central guide barrel (11) and a top end of the outer guide barrel (2); an overflow guide barrel (3) disposed between the central guide barrel (11) and the outer guide barrel (2), there is a gap between a top end of the overflow guide barrel (3) and the upper sealing baffle (4); a lower sealing baffle (63) extending radially between the outer guide barrel (2) and the overflow guide barrel (3) and being hermetically connected with a bottom end of the outer guide barrel (2) and a bottom portion of the overflow guide barrel (3); and a liquid outlet pipe (7).