32results about How to "Avoid contact reactions" patented technology

The invention discloses a preparation method of aluminum-oxide-coated nano lithium titanate composite material, which comprises the steps of: adding aluminum salt solution into prepared Li4Ti5O12 suspending liquid under the stirring condition, wherein the adding quantity of the aluminum salt solution is in accordance with the molar ratio as follows: Ti: Al=5: x, and x=0.01-0.55; simultaneously, adding a right amount of ammonia water, and adjusting the pH value to be 8-10; stirring for reaction for 30-50 minutes, and standing still for about 6 hours; after filtering, washing and drying, obtaining precursor of the aluminum-oxide-coated nano lithium titanate composite material; and finally, sintering the obtained precursor of the aluminum-oxide-coated nano lithium titanate composite materialat 400-600 DEG C for 4-10 hours, naturally cooling to be room temperature, and obtaining the aluminum-oxide-coated nano lithium titanate composite material.

The invention provides a thermal power plant high-temperature flue gas waste heat recovery device using a single tank of molten salt heat exchange, belonging to the technical field of molten salt heat exchange, including: hot air inlet pipe, upper cold tank area, molten salt heating area, and lower hot tank zone, hot zone for molten salt, spiral rising cold tank zone, thermal insulation and dust removal zone, and maintenance spare tank zone. On the outer ring of the cylindrical area, the spiral rising cold tank area surrounds the outer ring of the heat preservation and dust removal area. The molten salt flows naturally from the upper cold tank area to the molten salt heating area to avoid the problem of dry burning of the heating device caused by the failure of the molten salt pump. On this basis, this device also solves the problems in the molten salt heat exchange technology, such as the molten salt is in contact with the outside world, the molten salt is easy to leak and difficult to detect, the heat preservation requirement is high, and the molten salt is easy to stay and condense. The entire molten salt heat exchange device has the characteristics of stability and reliability, small heat dissipation, maximum utilization of resources, and convenient maintenance.

The invention belongs to the technical field of spherical metal powder preparation, and in particular relates to an ultrasonic atomization device and a method for preparing spherical metal powder. The ultrasonic atomization device provided by the invention comprises an ultrasonic vibration system (1), a rack and pinion system (2) and an atomization system (3); the ultrasonic vibration system (1) comprises a fixedly connected transducer (1- 1) and a horn (1‑2); the atomization system (3) includes a fuse system (3‑1) and an atomization chamber (3‑2) below the fuse system (3‑1) ); the mesh sieve (3-2-1) is set in the atomization chamber (3-2); the horn (1-2) and the rack and pinion system (2) mesh; the gear teeth The bar system (2) and the spray chamber (3‑2) mesh. In the device provided by the invention, the horn has no contact with the molten metal, and there is no cavitation corrosion.

The invention relates to a preparation method of a cold-formed soap. The method has simple process steps, and substitutes traditional aqueous solution of sodium hydroxide with sodium hydroxide or a dispersion of sodium hydroxide and glycerol; sodium hydroxide is completely soluble in glycerol but disperses in glycerol, so as to avoid fast reaction after mixing of sodium hydroxide solution with oil too, reduce the initial reaction rate of saponification, and effectively control saponification reaction rate; along with the saponification reaction, the reaction product of glycerol continuously increases to help more fully dispersion of sodium hydroxide, accelerate the reaction rate of sodium hydroxide and the remaining oil. Since the method employs an anhydrous formula, water evaporation process is not needed after soap formation by liquid soap, and the production cycle is significantly shortened; and the nutrition substances are added in solid form powder to effectively prevent the contact reaction of non-alkali-resistant nutrients and alkali hydroxide molecules, so as to retain the active nutrient ingredients in the soap and give full play to the role of skin care of the nutrients.

The invention is applicable to the fields related to chemical production, and provides a sampling device for chemical analysis, comprising a sampling component for scooping up and holding the chemical; a sealing component for sealing and storing the chemical in the sampling component; The receiving component is used for receiving the sealing component and the sampling component; the operating component is used for removing the sampling component from the receiving component. After the sampling component completes sampling of the chemical agent, the sealing component seals the sampling component, so that the chemical agent in the sampling component is isolated from a large amount of air, and the containment component restricts the sealing component and the sampling component to be fastened to avoid the sealing component and the sampling component. It is opened during the transport process, which effectively avoids the problem that the chemical agent may volatilize during the long-distance transport process or the chemical agent may contact and react with substances in the air for a long time.

The invention relates to a catalytic cracking method of hydrocarbon oil. The processes are carried out in a riser tube or a fluidized bed reactor at least comprising upper and lower reaction zones. The method comprises the following steps: leading raw gasoline and a spent catalyst and / or a semi-regenerated catalyst in the lower reaction zone to carry out contact reaction; and leading heavy raw materials and a regenerated catalyst in the upper reaction zone to carry out contact reaction with the oil and gas and the catalyst from the lower reaction zone. The method can increase the yield of theliquid and simultaneously improve the quality of the gasoline.

The invention discloses a sulfide electrolyte and a preparation method thereof, belonging to the technical field of battery materials. The sulfide electrolyte described in the product developed by the present invention is Li 4‑x Ge 1‑x m x S 4 ; In the sulfide electrolyte, containing partially crystallized Li 4‑x Ge 1‑x m x S 4 ; The sulfide electrolyte includes silicon crystallites whose mass is 1-3% of the mass of the sulfide electrolyte. The crystallized Li 4‑x Ge 1‑ x m x S 4 and amorphous Li 4‑x Ge 1‑x m x S 4 The mass ratio is 1:5~1:20. Partially crystallized Li 4‑x Ge 1‑x m x S 4 The average particle size is 0.01-50μm, and the average specific surface area is 1-20m 2 / g. The product obtained by the invention not only has good ion conductivity, but also has good air stability.