63results about How to "Does not affect formation" patented technology

The preparation process of lateral hydroxyl group containing polyimide / SiO2 hybrid film includes dissolving polyamido acid containing lateral hydroxyl group or polyimide in 1-1400 portions in solvent to compound 5-15 % concentration solution, adding silane coupling agent containing epoxy radical in 0-250 portions for reaction at 120-150 deg.c in the presence of catalyst in 0.1-10 portions of 2-4 hr; cooling to room temperature, adding n-silicate ester in 1-1000 portions through stirring for 6-24 hr, flow casting to form film, and processing at 0.1 atm negative pressure and 60 deg.c for 12 hr, and 160 deg.C for 2 hr, at 200 deg.c for 2 hr, at 260 deg.c for 1 hr and at 300 deg.c for 0.5 hr to obtain the lateral hydroxyl group containing polyimide / SiO2 hybrid film.

The purpose of the present invention is to improve the solubility of a 3-[2-fluoro-5-(2,3-difluoro-6-methoxybenzyloxy)- 4-methoxyphenyl]-2,4-dioxo-1,2,3,4-tetrahydrothieno[3,4-d] pyrimidine-5-carboxylic acid. Disclosed is a choline salt represented by formula (A), which has excellent solubility and excellent storage stability.

A bend pipe forging die with a springing device comprises a fixed die body and a movable die body, wherein the movable die body is arranged below the fixed die body; a convex die body is arranged on a forging surface of the fixed die body; a concave die body which is matched with the convex die body is arranged on a forging surface of the movable die body; the convex die body is matched with the concave die body to form a forging cavity of which the shape is matched with that of a bend pipe; the springing device is arranged in the movable die body; a downward blind hole is formed in the forging surface of the movable die body; the springing device comprises a first spring arranged at the bottom of the blind hole and a pressure lever arranged on the first spring; the upper end of the pressure lever extends out of the blind hole; the upper part of the pressure lever is a wedge-shaped surface; a through hole is formed in a position, which corresponds to the forging cavity, of the wedge-shaped surface; a push rod which is matched with the wedge-shaped surface of the pressure lever is arranged in the through hole; and a resetting spring is arranged on the push rod. The springing device is arranged in the movable die body, so that a finished bend pipe can be unloaded from the die when stripped from the die; the labor intensity of workers is reduced; and the forging efficiency of the bend pipe is improved remarkably.

The invention relates to a preparation method and application of a mixed oxide-doped nano copper-cobalt alloy catalyst. According to the catalyst, CuCo serves as an active component and mixed oxide serves as a carrier, wherein Cu accounts for 5-25% in the catalyst in percentage by mass, Co accounts for 5-25% in the catalyst in percentage by mass, Al2O3 accounts for 13-25% in the catalyst in percentage by mass, and one of SiO2, ZrO2, CeO2 or TiO2 accounts for the balance. The mixed oxide-doped nano copper-cobalt alloy catalyst is obtained by calcinating and reducing a hydroxide-doped hydrotalcite-like precursor. Since silicon, zirconium, cerium and titanium ions cannot enter a hydrotalcite-like laminate, the dispersion of copper and cobalt on the surface is improved, the dispersion degree of active components is increased, and the formation of a hotspot in a reaction process of synthesizing low-carbon alcohol is relieved. The catalyst is relatively high in low-carbon alcohol selectivity and low-temperature activity, easy to operate, and low in cost and is applicable to industrial production.