42results about How to "Suitable for industrial promotion and application" patented technology

A method for preparing copper powder and ferrous sulfate by using a solution leached through a sludge containing copper wet method comprises the following steps that firstly, the solution is leached through the sludge containing copper wet method and filtered; the filtered leaching agent is transferred into a reactor, iron powder is added for a replacement reaction, the concentration of Cu2+ in the leaching agent is reduced to be less than 0.5 g / L after the reaction is complete, solid-liquid separation is conducted, and the copper powder and the replaced solution are obtained; a reducing agent is added to the replaced solution, and the redox potential in the replaced solution is controlled to be reduced to be less than 400 mV; the replaced solution is transferred to an impurity removal reaction tank, heating is conducted, an inorganic solution containing phosphate radical is slowly added, solid-liquid separation is conducted, and phosphate precipitate and impurity-removed liquid are obtained; and the concentration of Fe2+ ions in the impurity-removed liquid is increased to be greater than 300 g / L after evaporation and concentration, transferring to a cooling system is conducted for crystallization, and a ferrous sulfate heptahydrate product is obtained after washing. By the adoption of the method, the cost is low, environmental protection is achieved, the added value of products is high, and resource utilization of waste resources can be achieved.

The invention provides a nematicidal candida and its preparation method and application, belonging to the technical field of microbial pesticides. The bacterial strain of the present invention is Candida krusei (Candida krusei) TY9, which was preserved in the China Center for Type Culture Collection on September 20, 2014, and the preservation number is CCTCC M 2014435. The Candida krusei The TY9 strain is prepared by conventional liquid fermentation culture, and is used in the prevention and treatment of plant parasitic nematodes, especially has a good control effect on all-tooth resurrection nematodes and / or pine wood nematodes, and has low cost, simple preparation process, easy-to-obtain raw materials, and nematodecidal The invention has the advantages of good effect and the like, and is suitable for industrial promotion and application.

The invention discloses an antimony sulfide-based composite material and a preparation method and application thereof. The antimony sulfide-based composite material is prepared from natural stibnite and carbon materials. The suspension of the carbon material is mixed and then subjected to hydrothermal treatment and calcination to obtain the antimony sulfide-based composite material. The antimony sulfide-based composite material provided by the invention uses natural stibnite as raw material, avoids the problem of environmental pollution and high cost in the process of preparing high-purity antimony sulfide, and has a simple and efficient technological process, greatly reduces the preparation cost, and is stable and reliable. , the obtained antimony sulfide-based composite material has a wide range of applications, and has broad application prospects as a negative electrode material for lithium ion or sodium ion batteries.