Tetracycline antibiotics are a kind of broad-spectrum antibiotics produced by Streptomyces, including aureomycin, oxytetracycline, tetracycline and so on. The use and abuse of these antibiotics make most of the antibiotics not fully absorbed by animals or human body and directly discharged into the water body, which has a serious impact on the environmental system and is regarded as a typical micro-polluted organic matter. The removal of antibiotics represented by tetracyclines has become an urgent scientific research problem.

Ultrafine tungsten carbide powder commonly produced on the market is produced by carbon tube furnace or molybdenum wire furnace after mixing nanometer, ultrafine or fine tungsten powder with carbon black, then crushed by ball mill, and finally screened to obtain fine tungsten carbide powder products.

Propylene is one of the most important basic organic raw materials after ethylene. Its maximum use is to produce polypropylene, accounting for about 60%, followed by acrylonitrile, propylene oxide, isopropyl benzene, isopropanol, carbonyl alcohol and other downstream products.

Manganese tungstate is an important functional material with tungsten-manganese-iron structure. It has broad application prospects in photoluminescence, optical fibers, Polyferrous materials, photocatalysts, scintillators, humidity sensors and magnetic materials.