79results about How to "Suitable for industrial amplification" patented technology

The invention discloses a molecular sieve composite membrane which is a multichannel molecular sieve composite membrane formed by molecular sieve polycrystal membranes, which are the same kind as the molecular sieve particles constituting the support body, on the internal surface of a porous multichannel composite support body formed by 40-90 wt% of molecular sieve particles (the particle sizes are 0.1-5 m) and 10-60 wt% of organic macromolecules or organic macromolecule mixture. The preparation method comprises the following steps: (1) adding sodium aluminate to distilled water, sufficiently stirring to form an aluminum solution, dissolving sodium hydroxide in the distilled water, defecating, adding a silicon source, heating and stirring to form a silicon solution, adding the aluminum solution into the silicon solution, and stirring to prepare reaction liquor for synthesizing the molecular sieve membrane; (2) and pouring the reaction liquor into a high pressure reactor, directly and perpendicularly inserting the organic macromolecular / molecular sieve composite support body into the reaction liquor to carry out the hydrothermal synthesis, cooling after crystallizing, washing with distilled water to be neutral, and drying to obtain the molecular sieve composite membrane. The invention has the advantages of simple operation, high repetitiveness of membrane formation and favorable performance, and is suitable for industrial magnification.

The method of exhausting and in-situ hydrothermally synthesizing type-A molecular sieve film includes: pumping with water pump or compressing with compressor to make the crystal kernel formed in the synthetic liquid migrate fast to the surface of the base film to speed the synthesis of type-A molecular sieve film, with the pumping or compressing pressure being 0.0005-0.0500 MPa and the pumping or compressing time being 10-500 min; and hydrothermally synthesizing type-A molecular sieve film in the solution comprising Na2O in 20-100 portions, Al2O3 in 0.5-5 portions, SiO2 in 5 portions and H2O in 500-4000 portions at 323-373 K for 1-60 hr. The present invention has obviously reduced molecular sieve film synthesizing time and raised material utilization, and the synthesized molecular sieve film is homogeneous, compact and continuous.

The invention discloses a preparation method of main chain fluorine silicon modified polyimide. The steps of the method are as follows: A. react perfluoroalkyl diol with toluene diisocyanate at room temperature for 8-16 hours to obtain perfluorinated polyimide Diol isocyanate; B Dissolve perfluorodiol isocyanate and aromatic tetraacid dianhydride in an organic solvent in sequence, heat to 50‑80°C and stir for 4~6 h under a nitrogen atmosphere to obtain a polyimide containing fluorine in the main chain. Amine; C. Add silicon-containing diamine and aromatic tetra-acid dianhydride to the polyimide solution containing fluorine in the main chain in sequence, and react at room temperature for 4~8 h under nitrogen atmosphere to obtain the fluorine-containing silicon polyimide in the main chain. The prepolymer of the coating film is baked to obtain the main chain fluorosilicon modified polyimide material. The fluorine-silicon modified polyimide film prepared by the method of the invention has good water repellency, light transmittance, film-forming property and adhesion performance, and the operation method of the invention is simple, and is suitable for industrial scale-up.