Potassium borohydride

The white crystalline powder or granule has a certain hygroscopicity, dissolves in water and slowly separates and liberates hydrogen, decomposes relatively quickly under acidic conditions, and is relatively stable under alkaline conditions. Soluble reducing agent, which is milder and more stable than sodium borohydride, is commonly used in pharmaceutical, pulp bleaching, precious metal recovery, and prevention of heavy metal pollution. Can be used as a carbonyl compound (aldehydes, ketones, acids, acid amides, acid anhydrides, acid halides, esters, enol esters, imides, lactones), carbonitrides (azide) , diazonium salts, terpenoids, imines, nitriles, hydrazines, nitro compounds, etc.) and reducing agents for peroxides and hydroperoxides; refining and removing color, odor and Oxidation control, pollution control and precious metal recovery in the photographic and metal finishing industries, manufacture of pharmaceuticals and fine chemicals, and preparation and recovery of catalysts.

I. Potassium borohydride  dryer--Overview of equipment

In the pharmaceutical, food, chemical and other industries, the demand for drying equipment is constantly expanding, and the requirements for the effect of dry materials are getting higher and higher. Most of them use vacuum kneading dryers. The design is reasonable, the structure is simple, and the operation is convenient. The short arm spiral molars and the long arm spiral teeth are used to ensure uniform mixing of materials on the one hand, and uniform heating of the materials on the other hand, which accelerates the speed of dry materials and improves materials. The drying effect and the dust collector used at the same time avoid the phenomenon of taking away materials when vacuuming, thereby improving the quality of the discharge. Potassium borohydride  dryer changes the medium heat transfer mode, solves the problem of material sticking, improves drying efficiency, can dry general materials, and can dry high moisture content, high viscosity, difficult to dehydrate, temperature sensitive materials .

The working principle and drying process of the potassium borohydride dryer are: loading the material to be dried in a rectangular box with a semicircular bottom equipped with a finned stirrer, and stirring the fins to stir the material. The hot air inlet on the cover of the rectangular box is sprayed with hot air. Under the action of the air deflector, the hot air is tangential to the circumference of the semi-cylindrical bottom to form a cyclone. The rotation direction of the stirrup is the same as the hot air, and the hot air in the semi-cylindrical cavity is The interaction between the fins and the fins forms a rotating field. Due to the strong action of the agitator, effective heat transfer between the hot air and the wet material is carried out. The moisture in the material rapidly vaporizes and diffuses into the hot air to dry itself, and the hot air is dry due to moisture. The heat is absorbed to cool down and take away the moisture to become a hot and humid tail wind. The windshield is exhausted from the windshield outlet on the other side of the upper cover of the body to discharge the drying chamber, and the exhausted tail wind passes through the dust exhausted on the tail air discharge port. After the bag is filtered and emptied, the function of the windshield is to prevent the hot air from being directly discharged from the outside of the machine without exchanging heat with the material. The dryer belongs to the gap operation, and is discharged from the lower discharge port of the body after the material is dried.