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Methanol-to-propylene catalyst and preparation method thereof

The invention belongs to the technical field of coal chemical catalysts, and particularly relates to a methanol-to-propylene catalyst and a preparation method thereof. According to the preparation method of the methanol-to-propylene catalyst, the acid-extracted clay and the pre-crystallization liquid are added into the preparation raw materials, the catalyst is prepared through an in-situ molecular sieve crystallization technology, the content of nano zeolite ZSM-5 in the prepared methanol-to-propylene catalyst is high, and ZSM-5 nano crystal grains and molybdenum-tungsten composite metal have a synergistic effect; the propylene yield can be greatly improved, and the activity stability of the catalyst is improved.

Liquefied gas aromatization catalyst and preparation method thereof

The invention belongs to the technical field of catalysts, and particularly relates to a liquefied gas aromatization catalyst and a preparation method thereof. According to the preparation method of the liquefied gas aromatization catalyst, the acid-extracted clay and the pre-crystallization liquid are added into the preparation raw materials, the catalyst is prepared through an in-situ crystallization molecular sieve technology, the content of nano zeolite ZSM-5 in the prepared liquefied gas aromatization catalyst is high, and ZSM-5 nano crystal grains and zinc-rare earth have a synergistic effect; the conversion rate and aromatic hydrocarbon selectivity of liquefied gas can be greatly improved, and the activity stability of the catalyst is improved.

Method for preparing succulent culture medium

The invention relates to the technical field of plant cultivation substrates, and discloses a method for preparing a succulent cultivation substrate, which comprises the following steps: step 1, sieving river sludge to obtain river sludge containing gravel particles with the particle size of less than 10mm for later use; step 2, fully and uniformly mixing the domestic sludge and fermentation auxiliary materials, and performing first-stage aerobic fermentation; 3, the river sludge and the first-stage oxygen fermentation product are fully mixed to be uniform and then subjected to second-stage aerobic fermentation, and a nutrient substrate product is obtained; step 4, further finely screening the nutrient medium product to obtain a particle mixture with the particle size of 5-10mm and a nutrient culture medium with the particle size of less than 5mm; and step 5, during use, paving the particle mixture on the lower layer of a planting soil layer, and paving the nutrient culture medium on the ...

Oil diffusion vacuum device for distillation monoglyceride production process and application method thereof

The invention relates to the technical field of oil diffusion vacuum equipment, in particular to an oil diffusion vacuum device for a distilled monoglyceride production process and an application method thereof.The oil diffusion vacuum device comprises a positioning bottom plate, the upper surface of the positioning bottom plate is fixedly connected with an equipment body, and the equipment body is fixedly sleeved with a cooling pipe; air guide pipes are fixedly connected to the positions, located on the two sides of the cooling pipe, outside the equipment body in a sleeving mode, and an oil baffle elbow is fixedly connected to the interior of one side of the equipment body; the environment of the equipment is deeply analyzed, so that the air guide pipe can be used for multiple purposes, namely, the interior of the equipment main body is preheated through the air guide pipe, then the equipment main body is cooled through the air guide pipe, and in the process that the equipment main body ...

Extraction device for preparing rhizoma drynariae and use method thereof

The invention discloses a rhizoma drynariae extraction device and a use method thereof, and relates to the technical field of rhizoma drynariae extraction, the rhizoma drynariae extraction device comprises a tank body assembly, and the tank body assembly comprises a main body tank. According to the rhizoma drynariae extraction device and the use method thereof, active ingredients in rhizoma drynariae and other traditional Chinese medicinal materials are extracted by adopting an ultrasonic-assisted technical method, so that the extraction efficiency can be effectively improved, the solvent dosage is reduced, the effective ingredient rate is increased and the like, the device is suitable for large-scale extraction, and the efficiency and quality of extracting the active ingredients of the medicinal materials are further improved; active extracting solutions in medicinal materials are simply purified for multiple times, the final extracting quality of the extracting solutions is improved, ...

A fire door frame of the door

... 本发明涉及防火门的技术领域，具体为种防火门的门框，包括主框架，所述主框架包括由上下左右四块内侧防火板围成的内框和位于内框外侧的同样由上下左右四块外侧防火板围成的外框，内框和外框之间连接有分隔防火板，分隔防火板将内框和外框之间的区域分隔成多个方格，所述方格的上板面、左板面、下板面和右板面上均安装有永磁铁片，每个方格中的各个永磁铁片靠方格中心侧的磁极的极性均相同，结构牢固稳定、重复利用率高、成本低且防火效果好。 ...

Comprehensive protection method for binary geologic structure road slope

The invention provides a comprehensive protection method for a road slope with a binary geological structure, which comprises the following steps of: excavating a binary geological slope reserved with a protective layer according to a designed slope ratio, arranging a slope platform on a soil-rock interface, and constructing a rock anchor rod drill hole extending along the vertical direction on the slope platform, rock anchor rods matched with the rock anchor rod drill holes are inserted after the rock anchor rod drill holes are cleaned, cement mortar is poured, a longitudinal drainage device and a longitudinal concrete retaining wall corresponding to the rock anchor rods are constructed on the slope platform, and the longitudinal drainage device is arranged between the longitudinal concrete retaining wall and the slope surface of the soil slope; the longitudinal drainage device is used for draining underground water of the soil slope, a protection layer of the soil slope is excavated in ...

Biomass particle combustion U-shaped heating furnace

The invention discloses a biomass particle combustion U-shaped heating furnace, which comprises a machine base; the combustion cavity device is fixed on the upper end surface of the machine base and is used for combusting and carbonizing biomass particle fuel; the feeding hopper is arranged above one side of the machine base in an overhead mode, the lower portion of the feeding hopper is communicated with a discharging pipe in an inclined mode, and one end of the discharging pipe is connected with the combustion cavity device; the secondary combustion cigarette assembly is vertically fixed to one side of the upper end face of the combustion cavity device, and the secondary combustion cigarette assembly is matched with the combustion cavity device to form a U-shaped combustion structure; the upper flow divider communicates with the upper portion of the secondary smoke combustion assembly and is used for dividing weak smoke and heat flow and discharging the weak smoke and the heat flow outwards ...