5 results about "Solid phase crystallization" patented technology

A semiconductor film comprising a solid phase crystallized product of tin and hydrogen-doped indium oxide.

The utility model discloses a solid-liquid separation device for sodium methoxide production, which comprises a horizontal base, a support casing is arranged on the horizontal base, a separation spiral groove is arranged on the support casing, one end of the separation spiral groove is connected with a separation feed pipe, and the other end of the separation spiral groove is provided with a separation motor corresponding to the separation feed pipe. A separation outer cylinder is arranged in the separation spiral groove; the utility model relates to the technical field of sodium methoxide production, in particular to a solid-liquid separation device for sodium methoxide production, which is used for solid-liquid separation of crystals in the refining process of sodium methoxide, the crystals are subjected to solid-liquid separation through centrifugal equipment with a thread structure, solid-phase crystals generated in the separation process advance towards one side, and liquid-phase materials are separated towards the other side. And an inner isolation filter screen and an outer isolation filter screen are correspondingly arranged at the end parts of the separation inner cylinder and the separation outer cylinder, so that solid-liquid separation is realized, and the inner cylinder and the outer cylinder are cleaned by using cleaning brushes with inner and outer structures, so that crystal grains are prevented from blocking meshes.

The present application relates to a kind of high selectivity molecular sieve based on high-silicon low-calcium fly ash preparation and its preparation method and application, belong to molecular sieve preparation technical field.To solve the problem that molecular sieve crystallization process and high-silicon low-calcium fly ash raw material characteristics do not match, the present application provides the preparation method of high selectivity molecular sieve based on high-silicon low-calcium fly ash preparation, steps include targeted removal Fe2O3 Impurity, silicon-aluminum is activated and dissolved to obtain the silicate gel of controllable water content, using seed and mechanical force coupling direction solid phase crystallization and forming calcination obtain SiO2-Al2O3 Type molecular sieve.The present application improves the purity of molecular sieve crystal to 90~98%, the deviation of pore size distribution is reduced to below 5%, greatly improves the regularity and stability of molecular sieve crystal structure, also improves its adsorption capacity to NH4 + , CO2 And the separation coefficient of NH4 + And other cations, has wide application prospect in wastewater denitrification and carbon capture field.

The application discloses a shape-selective alkylation catalyst and a preparation method and application thereof, and relates to the field of chemical industry. The in-situ doped Mg-ZSM-5 molecular sieve crystal with multistage pores is obtained by an in-situ hydrothermal synthesis method, Mg dispersion and fixation are promoted while the acidity of ZSM-5 is adjusted, and the migration change of Mg in the shape-selective alkylation reaction process is effectively inhibited. The molecular sieve crystal is used as a precursor, neutral transparent nanometer silicon sol is used for bonding and forming, and then secondary crystallization is carried out through the in-situ gas-solid phase crystallization conversion method, so that the nanometer silicon sol completely covered on the surface of the Mg-ZSM-5 is in-situ converted into full-silicon S-1 molecular sieve crystal phase with the same topological structure as the ZSM-5 molecular sieve, the acid sites on the outer surface of the molecular sieve are effectively and completely passivated through the complete coverage of the full-silicon S-1 molecular sieve on the outer surface of the Mg-ZSM-5, and the good connectivity of the molecular sieve channel is reserved. The shape-selective alkylation catalyst can be applied to the alkylation process of synthesizing p-methyl ethyl benzene from toluene and ethanol or ethylene.