Abstract: A separation device includes a membrane separation module (10), an adsorption module (20), and a gas intake module (30). The membrane separation module includes a first housing (110), and a membrane assembly (130) disposed in the first housing. The first housing has a first gas inlet (121), a first gas outlet (122), and a retentate gas outlet (123). The membrane module has a permeate gas outlet, the permeate gas outlet being in communication with the first gas outlet. The adsorption module has a second housing (210) and an adsorbent layer (230) disposed in it. The second housing is disposed on the first housing and has a second gas inlet (221), a second gas outlet (222), and a desorption gas outlet (223). The second gas inlet is in communication with the first gas outlet. The gas intake module has a third gas outlet (321) in communication with the first gas inlet.

Abstract: A system for producing needle coke and a method for producing needle coke using the system are provided. The system includes a coke tower, a pressure stabilization tower, a buffer tank and a coking fractionation tower. A pressure controller is provided at the top of the pressure stabilization tower for adjusting the pressure at the top thereof. An oil gas outlet of the coke tower is in communication with an oil gas inlet of the pressure stabilization tower through a pipeline. No pressure controller for adjusting the pressure at the top of the coke tower is provided in the coke tower or on the oil gas pipeline connecting the coke tower to the pressure stabilization tower.

Abstract: The present disclosure provides a microchannel liquid-liquid mixing device, comprising a microchannel component and a shell, wherein the microchannel component is fixed inside the shell, wherein an inlet is provided at one end of the shell for feeding at least two reaction liquid phases, and an outlet is provided at the other end for discharging a mixed material; said microchannel component comprises multiple stacked sheets and oleophilic fiber filaments and hydrophilic fiber filaments filled in the crevices between adjacent sheets, wherein the fiber filaments form several microchannels between them, and the fiber filaments are clamped and fixed by the sheets. The microchannel liquid-liquid mixing device is used for at least two reaction liquid phases to form a mixed material, and the at least two reaction liquid phases are cut by fiber filaments and mixed in the microchannel mixing device to form a mixed material.

Abstract: A method for producing a fuel oil includes the steps of (1) bringing a sulfur-containing feedstock oil and an alkali metal into contact for a pre-reaction to obtain a pre-reaction material, wherein the pre-reaction is performed under hydrogen-free conditions; (2) bringing the pre-reaction material into contact with a hydrogen-supplying agent for a hydrogenation reaction; and (3) separating the material obtained in step (2) to obtain a liquid-phase product fuel oil and a solid mixture. Using this method, inferior and cheap feedstock oils, such as heavy residual oils, can be converted into fuel oils.

Abstract: A process for producing propylene involves dehydration of isopropanol. The dehydration process includes a step of subjecting a starting material containing isopropanol to a dehydration reaction in the presence of a dehydration catalyst comprising alumina to produce a product containing propylene. The starting material has a water content of 0.1 to 10.0 wt % (relative to 100 wt % of the total mass of the starting material), and the product has a total content of C2 unsaturated impurities and C3-C4 unsaturated impurities of 80 ppm or less (relative to 100 wt % of the total mass of the product).

Abstract: A system for producing needle coke and a method for producing needle coke using the system are provided. The system includes a coke tower, a pressure stabilization tower, a buffer tank and a coking fractionation tower. A pressure controller is provided at the top of the pressure stabilization tower for adjusting the pressure at the top thereof. An oil gas outlet of the coke tower is in communication with an oil gas inlet of the pressure stabilization tower through a pipeline. No pressure controller for adjusting the pressure at the top of the coke tower is provided in the coke tower or on the oil gas pipeline connecting the coke tower to the pressure stabilization tower.

Abstract: A high-precision control system and method for shipborne cryogenic flash freezing of an aquatic product using liquid nitrogen is described. The system may include a main control system, a display unit, a liquid nitrogen supply system, a valve control unit, an acquisition unit, and a power unit. A flash freezing process is divided into four stages: a precooling stage, a flash freezing stage, a deep freezing stage, and a thermal insulation stage. Different cooling rates and flash freezing times are used for different stages, where a cooling rate is used in the flash freezing stage is the highest, a cooling rate used in the deep freezing stage is next, a cooling rate used in the precooling stage is the lowest, and an ambient temperature in a device is kept stable in the thermal insulation stage.

Abstract: The present disclosure discloses a touch substrate and a method for manufacturing the same. The touch substrate includes a substrate, and a touch electrode and an electrostatic discharge structure connected to the touch electrode on the substrate. The electrostatic discharge structure is configured to discharge static electricity generated in the touch electrode.

Abstract: The present invention relates to a preparation process for a Cu-based catalyst and use of the Cu-based catalyst as the dehydrogenation catalyst in producing a hydroxyketone compound such as acetoin. Said Cu-based catalyst shows a high the acetoin selectivity as the dehydrogenation catalyst for producing acetoin.

Abstract: A separation device includes a membrane separation module (10), an adsorption module (20), and a gas intake module (30). The membrane separation module includes a first housing (110), and a membrane assembly (130) disposed in the first housing. The first housing has a first gas inlet (121), a first gas outlet (122), and a retentate gas outlet (123). The membrane module has a permeate gas outlet, the permeate gas outlet being in communication with the first gas outlet. The adsorption module has a second housing (210) and an adsorbent layer (230) disposed in it. The second housing is disposed on the first housing and has a second gas inlet (221), a second gas outlet (222), and a desorption gas outlet (223). The second gas inlet is in communication with the first gas outlet. The gas intake module has a third gas outlet (321) in communication with the first gas inlet.

Abstract: The present invention relates to a Cu-based catalyst, a preparation process thereof and its use as the dehydrogenation catalyst in producing a hydroxyketone compound such as acetoin. Said Cu-based catalyst contains copper, at least one auxiliary metal selected from metal of Group IIA, non-noble metal of Group VIII, metal of Group VIB, metal of Group VIIB, metal of Group IIB and lanthanide metal of periodic table of elements, and an alkali metal, and further contains at least one ketone additive selected from a ketone represented by formula (II) and a ketone represented by formula (II?). Said Cu-based catalyst shows a high the acetoin selectivity as the dehydrogenation catalyst for producing acetoin. R1-C(?O)—CH(OH)—R2??(II) R1-C(?O)—CH(?O)—R2??(II?) In formulae (II) and (II?), each group is defined as in the description.

Abstract: The present disclosure discloses a touch substrate and a method for manufacturing the same. The touch substrate includes a substrate, and a touch electrode and an electrostatic discharge structure connected to the touch electrode on the substrate. The electrostatic discharge structure is configured to discharge static electricity generated in the touch electrode.

Abstract: A high-precision control system and method for shipborne cryogenic flash freezing of an aquatic product using liquid nitrogen is described. The system may include a main control system, a display unit, a liquid nitrogen supply system, a valve control unit, an acquisition unit, and a power unit. A flash freezing process is divided into four stages: a precooling stage, a flash freezing stage, a deep freezing stage, and a thermal insulation stage. Different cooling rates and flash freezing times are used for different stages, where a cooling rate is used in the flash freezing stage is the highest, a cooling rate used in the deep freezing stage is next, a cooling rate used in the precooling stage is the lowest, and an ambient temperature in a device is kept stable in the thermal insulation stage.

Abstract: An electrical testing jig includes: a substrate; a first bracket on the substrate, the first bracket having a first step extending in a first direction on a top of the first bracket; and a second bracket on the substrate, the second bracket being spaced apart from the first bracket in a second direction perpendicular to the first direction and having two second steps spaced apart from each other in the first direction on a top of the second bracket. Each of the second steps is angular.

Abstract: The present invention relates to the field of isobutylene preparation. Disclosed are a catalyst and preparation method thereof, and method for preparing isobutylene by applying the same; the catalyst has a core-shell structure, the core an amorphous silica-alumina particle and/or an aggregate molding thereof, and the shell aluminum oxide comprising silicon and tin; the weight ratio of aluminum oxide comprising silicon and tin to amorphous silica-alumina is 1:60-1:3; in the aluminum oxide comprising silicon and tin, on basis of the weight of aluminum oxide comprising silicon and tin, the content of silicon is 0.5-2 wt %, and of tin is 0.2-1 wt %. The catalyst of the present invention is used to catalyze a mixture of MTBE and TBA to prepare isobutylene, enabling the MTBE cleavage and TBA dehydration reactions to be conducted simultaneously to generate isobutylene, achieving higher conversion rates of TBA and MTBE, and higher selectivity for generating isobutylene.

Abstract: The present invention relates to a Cu-based catalyst, a preparation process thereof and its use as the dehydrogenation catalyst in producing a hydroxyketone compound such as acetoin. Said Cu-based catalyst contains copper, at least one auxiliary metal selected from metal of Group IIA, non-noble metal of Group VIII, metal of Group VIB, metal of Group VIIB, metal of Group IIB and lanthanide metal of periodic table of elements, and an alkali metal, and further contains at least one ketone additive selected from a ketone represented by formula (II) and a ketone represented by formula (II?). Said Cu-based catalyst shows a high the acetoin selectivity as the dehydrogenation catalyst for producing acetoin. R1-C(?O)—CH(OH)—R2??(II) R1-C(?O)—CH(?O)—R2??(II?) In formulae (II) and (II?), each group is defined as in the description.

Abstract: An electrical testing jig includes: a substrate; a first bracket on the substrate, the first bracket having a first step extending in a first direction on a top of the first bracket; and a second bracket on the substrate, the second bracket being spaced apart from the first bracket in a second direction perpendicular to the first direction and having two second steps spaced apart from each other in the first direction on a top of the second bracket. Each of the second steps is angular.

Abstract: The present invention relates to the field of isobutylene preparation. Disclosed are a catalyst and preparation method thereof, and method for preparing isobutylene by applying the same; the catalyst has a core-shell structure, the core an amorphous silica-alumina particle and/or an aggregate molding thereof, and the shell aluminum oxide comprising silicon and tin; the weight ratio of aluminum oxide comprising silicon and tin to amorphous silica-alumina is 1:60-1:3; in the aluminum oxide comprising silicon and tin, on basis of the weight of aluminum oxide comprising silicon and tin, the content of silicon is 0.5-2 wt %, and of tin is 0.2-1 wt %. The catalyst of the present invention is used to catalyze a mixture of MTBE and TBA to prepare isobutylene, enabling the MTBE cleavage reaction and TBA dehydration reactions to be conducted simultaneously to generate isobutylene, achieving higher conversion rates of TBA and MTBE, and higher selectivity for generating isobutylene.

Abstract: Disclosed is a catalyst for preparing isobutene by dissociation of methyl tert-butyl ether, the catalyst comprising amorphous silica alumina and a silicalite-1 molecular sieve, wherein the total IR acid amount of weak acids in the catalyst is in a range from 0.020 to 0.080 mmol/g, and the ratio of B acid/L acid of the weak acids is in a range from 2.5:1 to 4.0:1. Also provided is a method of preparing the catalyst and the use thereof. The catalyst has a high selectivity with respect to isobutene, and high conversion of methyl tert-butyl ether, and can also effectively inhibit formation of the by-product dimethyl ether.