30results about How to "Reduce copper ion content" patented technology

The invention relates to a polyester enamelled wire enamel removing process. The process includes following steps: 1), adding an enamel removing agent into an alkaline liquid tank, heating enamel film treatment temperature of a polyester enamelled wire, wherein the enamel removing agent is a sodium hydroxide and / or potassium hydroxide inorganic alkaline solution of 10-40% in mass concentration; 2), pumping the enamel removing agent in the alkaline liquid tank into the bottom of an enamel removing bucket with a stirring paddle, and placing the polyester enamelled wire to be subjected to enamel removing into the enamel removing bucket; 3), starting stirring after overflowing, and enabling rotating speed to be 30-300 rpm, wherein a shedding enamel film overflows along with the enamel removing agent from an overflowing tank at the top of the enamel removing bucket and flows into a filtering bucket; 4), separating the shedding enamel film from the enamel removing agent in the filtering bucket, wherein the enamel removing agent continues entering the alkaline liquid tank. The invention further relates to a polyester enamelled wire enamel removing device. The polyester enamelled wire enamel removing process and device is convenient to operate, wide in application range, good in enamel removing effect, free of volatilization, little in metal base material corrosion and capable of realizing mass enamel removing.

The invention belongs to the field of cyanide-free silver plating, and particularly relates to cyanide-free silver plating electric plating liquid capable of being used for dynamically monitoring thecopper ion pollution content, a simple convenient and fast detection method and a quantitative detection method. A copper ion concentration indicator is mainly added into the cyanide-free silver plating electric plating liquid. The copper ion concentration indicator is added into the cyanide-free silver plating electric plating liquid; the goal of monitoring the change of copper ion content in real time can be realized in a color development mode under the condition of not influencing the basic performance of the plating liquid; the copper ion content can be simply, conveniently and fast detected; the quantitative analysis is realized in the low-concentration copper ion content cyanide-free silver plating liquid. The copper ion content is monitored in real time, so that the cyanide-free silver plating liquid can be treated when the copper ion content exceeds a certain concentration value (suggested value: 2g / L); the copper ion content is reduced; the influence on the plating layer quality of a plating element is prevented. In addition, when the cyanide-free silver plating liquid fast becomes blue, the result shows that the probability of generating production accidents such as no energization or plating element falling is great; the management on the plating liquid and the control on the product quality are convenient.

The invention relates to a method for treating copper-containing waste water, comprising the following steps of: firstly, collecting copper-containing waste water, and regulating the pH value of the copper-containing waste water to be more than or equal to 8 and less than or equal to 10; secondly, adding excessive water soluble sulphide into the copper-containing waste water and stirring to be uniform; thirdly, removing precipitates in the copper-containing waste water; fourthly, regulating the pH value of the copper-containing waste water to be more than or equal to 3 and less than or equal to 4; fifthly, adding hydrogen peroxide and ferrous sulphate into the copper-containing waste water; sixthly, regulating the pH value of the copper-containing waste water to be more than or equal to 8 and less than or equal to 10; and seventhly, removing the precipitates produced in the copper-containing waste water. The method for treating the copper-containing waste water provided by the invention has a good treatment effect.

The invention relates to a membrane purification and alkalization control processing device for generator internal cooling water. A water inlet pipe (20) of the device is connected with a generator internal cooling water bypass (23); a water outlet of the device is directly returned to a generator internal cooling water tank (22); the pressure of inlet water, which enters the device, of the internal cooling water is detected by an onsite pressure gauge (1) which is mounted on an inlet pipeline; after entering the device, the generator internal cooling water enters an ion removing part. The device provided by the invention has advantages that the structure is simple, the cost is low, the conductivity of the internal cooling water is the lowest, a pH (potential of hydrogen) value is moderate, the content of copper ions is the lowest, the insulativity of a generator is furthest improved, and the running period is long. A method provided by the invention has advantages of being simple in technique, being convenient to operate and having a certain degree of automation.

The invention relates to the field of battery application and energy recovery, and in particular relates to a method for cleanly removing copper ions in copper-bearing vanadium solution, solving the defects that the existing copper removal technology is large in energy consumption, has secondary pollution to the solution, is high in process cost, and the like. The method comprises the step: based on copper-bearing vanadium solution as a raw material, introducing enough and clean reducing gas and clean gas having selective precipitation to copper ions to directionally precipitate copper under certain reaction environment. According to the method, no other impurities are introduced, no catalysts are needed, the operation is easy, the raw materials are easily available, the copper removal rate can achieve more than 80%, and the copper removal effect is obvious. The electrochemistry reversibility of treated electrolyte is good, the conductivity is high and the recycling of batteries can be realized.

The invention discloses a method for removing copper ions in a nitric acid-containing copper sulfate waster liquid; the method comprises the following steps: (1) firstly, adding sodium thiosulfate into the to-be-treated nitric acid-containing copper sulfate waster liquid, and stirring to dissolve sodium thiosulfate fully; (2) then, adding sodium hydrosulfite into the nitric acid-containing copper sulfate waster liquid treated in the step (1), and reducing the copper ions in the waste liquid into elemental copper; (3) then, adding a PAM solution into a filtrate obtained in the step (2); and (4) finally, allowing to stand, co-precipitating, filtering out the precipitate with a cloth bag filter, and removing copper in the tail liquid. The method utilizes sodium hydrosulfite and sodium thiosulfate for reducing the copper ions in the nitric acid-containing copper sulfate waster liquid into elemental copper, and solves the problems that a conventional copper-containing electrolyte is difficult to reuse and recycle.

The invention relates to the field of battery application and energy recovery and particularly relates to a method for removing copper ions from copper-containing vanadium liquid. The method is used for solving problems in the reutilization, recovery and the like of a copper-containing electrolyte in the prior art. According to the method, a vanadium battery electrolyte which is used for a long time and contains the copper ions is taken as a raw material, an organic-inorganic reducing agent and a decoppering agent are added in a proper proportion within a certain temperature range, and then, the copper ions are removed from the liquid. The method for removing the copper ions from the copper-containing vanadium liquid has the advantages that the process method is simple, the operation is easy, the raw material is easily available, the copper removal ratio is above 85%, and the copper removal effect is remarkable.