Sinopec Patente

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A self-adaptive flame monitoring method and system for an industrial area. The method comprises: in response to an initialization request signal, performing system initialization, and determining a flame monitoring scene on the basis of the system initialization result (S10); selecting a corresponding flame monitoring solution on the basis of the flame monitoring scene (S20); executing the flame monitoring solution, collecting a scene image in the flame monitoring scene, and identifying flame features on the basis of the scene image (S30); and on the basis of the identified flame features, performing early warning triggering condition determination, and executing a corresponding early warning solution on the basis of a triggered early warning triggering condition (S40).

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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 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.

A positively charged acid- and alkali-resistant composite nanofiltration membrane and a preparation method therefor and a use thereof. The positively charged acid- and alkali-resistant composite nanofiltration membrane sequentially comprises a bottom layer, a porous intermediate layer, and an acid- and alkali-resistant separation layer. The acid- and alkali-resistant separation layer comprises: (1) the quaternary ammonium salt group shown in formula I and/or the quaternary phosphonium salt group shown in formula II, grafted to the acid- and alkali-resistant separation layer through a N atom,wherein, R₁ is substituted or unsubstituted C1-C9 alkylene or phenylene; R₂, R₃, and R₄ are each independently selected from C1-C3 alkyl or phenyl; R₅ is a C1-C6 alkylene, phenylene, or C7-C10 aralkylene; R₆, R₇, and R₈ are each independently phenyl or C7-C10 aralkyl; X is halogen; or (2) a quaternary ammonium salt structure, wherein the quaternary ammonium salt structure comprises the structural formula shown in formula III and/or the structural formula shown in formula IV,wherein X is halogen; n is an integer of 0 to 10; m is an integer of 2 to 10. The acid- and alkali-resistant separation layer is at least one selected from a polyurea separation layer, a polytriazine amine separation layer, a polysulfonamide separation layer, a poly(triazine amine-urea) separation layer, a poly(sulfonamide-urea) separation layer, a poly(triazine amine-sulfonamide) separation layer, and a poly(triazine amine-sulfonamide-urea) separation layer. The nanofiltration membrane has a high metal retention rate while maintaining a high water flux.

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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.

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.

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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.

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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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