71results about How to "Solve unhandled problems" patented technology

The invention relates to a recycling method for rare earth leaching and leaching water of sulfuric acid roasted rare earth ore concentrate. The recycling method for rare earth leaching and leaching water of the sulfuric acid roasted rare earth ore concentrate is characterized by comprising the following steps of (1) mixing roasted ore and a calcium chloride solution obtained from the sulfuric acid roasted rare earth ore concentrate with a solid-to-liquid ratio of 1 to 1 to 7, performing agitation leaching under normal temperature for 0.5 to 3 hours, neutralizing through calcium compound to enable a PH (Potential Of Hydrogen) value to be from 2 to 3 and filtering to obtain leaching liquid; (2) saponifying an extraction agent P507 through calcium compound and obtaining a saponified P507 extraction agent; (3) mixing the leaching liquid obtained from the step (1) and the saponified P507 extraction agent obtained from the step (2) to extract rare earth, performing reextraction on a loaded organic phase to obtain a high-concentration rare earth chloride solution and meanwhile obtain extraction remained liquid containing calcium chloride; (4) enabling the extraction remained liquid obtained from the step (3) to be used for leaching rare earth. The recycling method for rare earth leaching and leaching water of the sulfuric acid roasted rare earth ore concentrate has the advantages of reducing water consumption by 60%; achieving recycling of extraction remained liquid and being free of wastewater discharging due to the fact that the extraction remained liquid directly returns back to be used for leaching rare earth.

The invention relates to a method for preparing hydrogen in process of producing manganous-manganic oxide through electrolytic manganese metal and belongs to the field of chemical metallurgy. The preparation method comprises the following steps: crushing the electrolytic manganese metal in the process of producing the manganous-manganic oxide by taking the electrolytic manganese metal as a raw material, reacting the electrolytic manganese metal with water to generate manganese hydroxide under specific conditions under the catalytic action of a catalyst, and releasing the hydrogen, wherein the specific reaction conditions in the process of preparing the hydrogen are that the crushing particle size of the electrolytic manganese metal is less than 150 microns, the addition amount of the catalyst is 5-15g of catalyst added into each 1000g of electrolytic manganese metal, the reaction temperature is controlled to be 40-90 DEG C, and the PH value of the reaction process is controlled to be 6-12. The manganese hydroxide generated through the reaction is prepared into a manganous-manganic oxide product through other oxidation processes, and the hydrogen concentration of the hydrogen released from the reaction can reach 80-90 percent, and the hydrogen becomes a final gas product. The added catalysts are ammonium chloride, ammonium sulfate, hydrochloric acid, manganese chloride and oxalic acid and also comprise two or more catalysts.

The invention discloses a method for releasing and processing network resources, comprising the following steps: after user equipment using an ISP mechanism registers two 3GPP communication networks and when the user equipment changes the 3GPP network into a non 3GPP communication network, the service gateway receives a message sent by an opposite end network element and deletes the network resources which is established by the two 3GPP communication networks for the user equipment according to the massage. The invention also discloses a mobility management network element and the service gateway. The embodiment of the method and equipment for releasing and processing the network resources realizes the releasing of resources when the user using the ISP mechanism equipment changes the 3GPP network into the non 3GPP communication network.