44results about How to "Alkaline" patented technology

The invention discloses a catalyst for decomposing heavy components in neopentyl glycol synthesis waste liquid and its preparation method and application. Copper carbonate exists in the form of copper carbonate, based on the mass of the catalyst, its percentage composition is MgO 10-30%, ZrO 2 10-30%, Al 2 o 3 10~30%, Cu 2 (OH) 2 CO 3 30-50%. The composite base catalyst of the present invention has two kinds of basic sites, one is derived from MgO, ZrO 2 and Al 2 o 3 and other oxides, and the second is derived from basic copper carbonate, so the catalyst has extremely strong alkalinity, and has a good catalytic effect on the decomposition of ester impurities in the heavy component waste liquid of the neopentyl glycol (NPG) plant to prepare NPG. The decomposition rate of various ester impurities can reach more than 90%, which can effectively improve the economic benefits of the device.

The invention discloses a preparation method of electrolyte used in an all-vanadium redox flow battery. The method comprises the steps that: vanadium slag is roasted by using sodium salt, and is processed through aqueous extraction and impurity removing, such that a sodium metavanadate solution is prepared; the sodium metavanadate solution is subject to acid modulation, and is subject to a reaction with concentrated hydrochloric acid, such that a VOSO4 solution is obtained; the VOSO4 solution is concentrated, such that the all-vanadium redox flow battery electrolyte is obtained. With the preparation method, the pollution to the environment can be effectively avoided, and production cost can be reduced. The method is beneficial for large-scaled productions. Also, with the method, existing vanadium resources such as vanadium slag can be reasonably utilized, such that vanadium resource waste is avoided, and production cost is reduced.

The invention belongs to the field of nano materials and in particular to a supercapacitor electrode material, and a preparation method and application thereof. A preparation principle is that a coordination compound is generated by utilizing the coordination of triethanolamine and metal ions, wherein the triethanolamine has a certain alkalinity in an aqueous solution, can be electrolyzed to produce OH-, and the coordination compound and OH- react to produce the metal hydroxide hydrogel. The preparation method comprises the following steps of filtering, washing and drying the generated metalhydroxide hydrogel to obtain a metal hydroxide film; cutting the metal hydroxide film into a desired size; and sandwiching a metal foam current collector between two foamed nickel current collectors,laminating the three current collectors into one body at the pressure of 5 to 20MPa to form a working electrode for a supercapacitor. The invention provides a supercapacitor electrode material, and apreparation method and application thereof. The electrode material can realize the function of a conventional supercapacitor without a conductive agent and an adhesive.