3results about How to "High value" patented technology

This invention belongs to the field of steelmaking furnace maintenance technology, specifically relating to a rapid hot-state furnace repair method for converters using thick plate trimmings as the repair material. Under the specific high-temperature, multi-slag hot environment after converter tapping, this invention utilizes thick plate trimmings with specific specifications and optional pretreatment as the structural framework. Residual high-temperature liquid slag serves as a natural high-temperature binder and heat transfer medium. Through precisely controlled feeding and furnace shaking, the two are driven to fully mix, impregnate, and spread. Finally, through a static thermal process, the mixture is sintered and solidified at the target furnace lining location, forming a composite ceramic-metal protective layer with interlocked microstructures, where the metal trimmings are the reinforcing phase and the condensed slag is the continuous binder phase. Furthermore, the resulting composite sintered layer exhibits superior erosion resistance and spalling resistance compared to traditional refractory material layers, resulting in more durable and safer furnace protection.

The application belongs to the technical field of fine chemical industry, and particularly relates to a method for preparing linear amine through selective hydrogen aminomethylation of olefin. The method uses olefin, amine, carbon monoxide or carbon dioxide and water as reaction raw materials, uses nitrogen heterocyclic carbene metal compound as a catalyst, uses pure water, ether, alcohol or benzene analogues as a solvent, and reacts at 80-200 DEG C for 4-48 hours to obtain corresponding linear (L) amine and branched (B) amine products. Compared with the prior art, the method can use cheap and easily available olefin and amine as starting raw materials, uses water as a hydrogen source, avoids using toxic and less stable phosphine ligands and high-pressure hydrogen, has a high reaction selectivity L / B value of 92 / 8, an amine yield of 96%, is simple to operate, and only needs simple post-treatment to obtain high-purity different amine products, and is suitable for industrial amplification and application.

The present application relates to solid waste resource utilization technical field, disclose a kind of methods for preparing silicon micro powder based on chlorination waste brine quenching slag in situ carbothermal reduction, method includes: S1, the molten salt chlorination waste brine quenching slag is carried out drying and ball milling treatment, and pretreatment material is obtained;S2, pretreatment material is carried out magnetic separation, and non-magnetic mixture is obtained;S3, after non-magnetic mixture and mixed acid are carried out acid dipping reaction, solid-liquid separation is carried out, and the silicon-rich filter residue containing silicon dioxide and elemental carbon is obtained;S4, after silicon-rich filter residue is washed and dried, silicon dioxide and elemental carbon in it are made to carry out carbothermal reduction reaction under inert atmosphere, and silicon micro powder product is obtained.The purity and resource utilization rate of silicon micro powder product are improved by the scheme of the present application, and high-value and clean utilization of waste water quenching slag is realized.