the of chemical industry's dalian research and design institute (drdi) has increased its technological innovation and pushed the industrialization with patented technology, with intellectual property rights as its main idea. in 2011, drdi it applied for nine patents, with four granted, one a domestic patent, and one an international patent. the international patent covered a "preparation method of pbo fiber with thiophene structure that can withstand ultraviolet light". it has a better performance than pbo fiber in withstanding ultraviolet light and maintains good performance in optics, electrics and magnetism.
the "synthetic method replacing benzotriazole compound" patent streamlines the synthetic process and reduces production costs with a higher rate of return, and facilitates industrialization. another paten covered a "benzotriazole light stabilizer with hindered amine group", which allows products to absorb ultraviolet light effectively and stabilize the hindered amine, and thus stabilize colophony, fiber, printing ink or wax effectively.
a method for producing high-quality, low-salt heavy sodium carbonate got two patents, and can improve the production method of low-salt heavy sodium carbonate, with light sodium carbonate generated by heated synthesis alkali production as the raw material. it solves the problem of large waste emissions during the ammonia-alkali production of low-salt heavy sodium carbonate and the inability of synthesis alkali production to produce low-salt heavy sodium carbonate.
the raw material can be rough sea salt, mineral salt, or bittern gathered from a salt mine with no waste liquid. a "kind of powdery high-polymer flocculant mixture device" patent helps solve the problem of uneven distribution of powdery high polymer flocculant in mixing, and is a user-friendly device that can make powdery high-polymer flocculant evenly distributed in the solvent or water. (zhao xiaoshu)
