5results about How to "High crystal purity" patented technology

The invention relates to the technical field of aluminum chloride, in particular to an anhydrous aluminum trichloride production system which comprises a reaction unit, a feeding unit, a heat exchange unit, a buffer unit and a crystallization unit, the heat exchange unit comprises a heat exchange shell and a plurality of heat exchange pipes, and the bottom wall of the heat exchange shell gradually inclines upwards in the direction away from a chlorination furnace; the buffer unit is used for buffering the aluminum trichloride and the fused salt carried by the aluminum trichloride so as to separate the fused salt from the aluminum trichloride; the feeding unit is used for feeding the chlorination furnace, generated aluminum trichloride sequentially passes through the heat exchange unit and the buffer unit and then enters the crystallization unit to form crystals, so that a set of complete and continuous production system is formed, and meanwhile, most fused salt can flow back to the chlorination furnace along the obliquely arranged heat exchange shell in the cooling process of the aluminum trichloride; and the residual molten salt is left in the buffer unit after being buffered and cooled by the buffer unit, so that most or even all of the molten salt carried in the aluminum trichloride gas can be removed, and the crystallization purity of aluminum trichloride is improved.

The invention discloses a triazole iron-based spin cross complex, which has the following chemical expression: [FeL2]X2; the invention also discloses a method for preparing the triazole iron-based spin cross complex: step 1, synthesizing ligand L by 2-cyano-6-(1-pyrazole)pyridine or 6-cyano-2,2'-bipyridine and hydrazide; step 2, reacting ligand L with ferrous salt in acetonitrile to obtain a reaction solution; step 3, placing the reaction solution in a closed container with ether and standing to precipitate crystals. The complex of the invention has a clear crystal structure and variable temperature magnetic susceptibility data, and the ligand field of the spin center can be adjusted by adjusting the terminal coordination point of the ligand L, and then the spin state of Fe(II) can be adjusted; by changing the substituent and counter anion on the ligand L to adjust the spin cross property of the complex, it has potential application value in the technical fields of high-density information storage and molecular switch devices.

The invention discloses an electronic-grade hydrofluoric acid in-situ recycling device, and belongs to the field of wet electronic chemicals. The device comprises a reactor body, and a rotational flow liquid mixer and a circulating guide cylinder are arranged in the reactor body; a backflow cavity is formed in the lower end of the reactor body, a returned material screening device is arranged on the upper portion of the backflow cavity, a circulating pump is arranged on the outer side of the reactor body and located at the backflow cavity, a first connecting pipe and a second connecting pipe are connected to the circulating pump, the first connecting pipe is communicated with the backflow cavity, and the second connecting pipe is communicated with the rotational flow liquid mixer. Two materials are mixed in a diagonal rotational flow mode through the rotational flow liquid mixer, the problem of local supersaturation is avoided, the returned material screener is arranged at the bottom of the reactor body, crystals and fluid mixed liquid are distributed in an umbrella shape at an inlet of a circulating fluidization area due to the arrangement of a returned material cone, and the crystallization effect is improved. And meanwhile, pores formed in the screening plate can be used for carrying out particle screening on the seed crystals, so that the sizes of the seed crystals entering the circulating fluidization area are homogenized.

The utility model relates to sodium sulfate processing technical field, concretely is a kind of sodium sulfate evaporation crystallization environmental protection type separator, including main separator, the inside of main separator is equipped with shunt component, shunt component includes the multiple shunt pipes of being set in the inside of main separator, the upper and lower ends of multiple shunt pipes are fixedly installed with baffle, the inner wall of multiple shunt pipes is equipped with the guide component for prompting liquid to form cyclone in shunt pipe inside, and the adjusting component for controlling multiple guide components is arranged on main separator in shunt pipe inside deformation and cleaning its inner wall;By setting guide component and adjusting component, reached the effect that can let sodium sulfate solution form cyclone in shunt pipe, cyclone motion increases the contact area of sodium sulfate solution and pipe wall, while centrifugal force promotes crystallization particle to gather and settle to pipe wall, improves crystallization purity, and can control the effect that helical elastic piece realizes automatic cleaning dirt, maintains heat transfer efficiency.

The invention provides a preparation method of a germanium triphosphide nanosheet, and belongs to the technical field of electrode material preparation. The preparation method comprises the following steps: step 1), pre-pressing mixed powder formed by red phosphorus powder and germanium powder to obtain a pre-pressed body; (2) carrying out high-temperature and high-pressure sintering on the pre-pressed body prepared in the step (1) to obtain bulk-phase germanium triphosphide; (3) taking the bulk-phase germanium triphosphide prepared in the step (2) as an electrode, and putting the bulk-phase germanium triphosphide into an electrolytic tank; 4) applying voltage or current to the electrode in the step 3) to perform intercalation dissociation on the germanium triphosphide; and (5) centrifuging the electrolyte subjected to electrochemical dissociation in the step (4), and collecting supernate to obtain the germanium triphosphide nanosheet. A large number of high-purity micron-sized germanium triphosphide nanosheets are prepared by combining a high-temperature and high-pressure technology with an electrochemical dissociation technology.