CN-122010162-A - Defluorination reagent Cg151 and preparation method and application thereof

Abstract

The invention discloses a defluorination reagent Cg151 and a preparation method and application thereof, wherein the defluorination reagent Cg151 is prepared from raw materials of 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide. The method comprises the steps of reacting raw materials of 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide in a formula ratio for 2-5 hours under the oxygen pressure of 0.5-1.0 KPa and the temperature of 150-300 ℃. The application is the application of the defluorination reagent Cg151 in a copper sulfate solution defluorination process. The defluorination reagent Cg151 has stable chlorine removal performance under the conditions of high acid and high temperature, and has high-efficiency defluorination performance.

Inventors

• HE XIAOCAI
• LIU JINYUE
• XU YUAN
• REN JIUYANG
• HE QIUGU
• Pei Jiangyong
• LI YINA
• SHI HUIXIAN
• LIN SHENGNAN
• FANG DE
• YUAN YE
• REN TING

Assignees

• 昆明冶金研究院有限公司

Dates

Publication Date

20260512

Application Date

20260224

Claims (10)

1. 1. The defluorination reagent Cg151 is characterized in that the defluorination reagent Cg151 is prepared from raw materials of 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide.
2. 2. The defluorinating agent Cg151 according to claim 1, wherein the molar ratio of 1, 4-xylylenediamine XDA, alumina and sodium hydroxide is (1-5): 1-10): 20-100.
3. 3. A method for preparing the defluorination reagent Cg151 according to claim 1 or claim 2, wherein raw materials 1, 4-xylylenediamine XDA, alumina and sodium hydroxide in a formula ratio are reacted for 2-5 hours under an oxygen pressure of 0.5-1.0 kpa and a temperature of 150-300 ℃.
4. 4. Use of a defluorination reagent Cg151 according to claim 1 or claim 2, wherein the defluorination reagent Cg151 is used in a copper sulphate solution defluorination process.
5. 5. The use according to claim 4, wherein the copper sulphate defluorination comprises pretreatment and main reaction steps, comprising in particular: A. The pretreatment, namely regulating the pH value of the copper sulfate solution to be treated to 2-5 to obtain a material a; B. And (3) the main reaction is that a defluorination reagent Cg151 is added into the material a for stirring reaction to obtain a defluorination copper sulfate solution.
6. 6. The use according to claim 5, wherein the fluoride ion content of the copper sulfate solution to be treated in step a is 110-160 mg/L.
7. 7. The use according to claim 5, wherein the defluorination reagent in step B is added in an amount of 4.5-6.5 g/L.
8. 8. The use according to claim 5, wherein the stirring speed of the stirring reaction in the step B is 100 to 200r/min.
9. 9. The use according to claim 5, wherein the temperature of the stirring reaction in step B is 50-80 ℃.
10. 10. The method according to claim 5, wherein the stirring reaction time in the step B is 1 to 3 hours.

Description

Defluorination reagent Cg151 and preparation method and application thereof Technical Field The invention belongs to the technical field of metallurgy, and particularly relates to a defluorination reagent Cg151, and a preparation method and application thereof. Background Copper sulfate is an important raw material for producing copper and is widely applied to the fields of metallurgy, chemical industry, electronics and the like. However, in the production process of copper sulfate, impurities accompanied with fluorine element are often present, and these impurities affect the purity and quality of copper sulfate, thereby limiting the application range and market value thereof. In order to improve the quality of copper sulfate, fluorine elements therein must be effectively removed. Therefore, it is necessary to develop a method capable of solving the above technical problems. Disclosure of Invention The first object of the invention is to provide a defluorination reagent Cg151, the second object is to provide a preparation method of the defluorination reagent Cg151, and the third object is to provide application of the defluorination reagent Cg 151. The first object of the present invention is achieved by preparing the defluorination reagent Cg151 from 1, 4-xylylenediamine XDA, alumina and sodium hydroxide as raw materials. The technical principle is as follows: First step, surface activation Sodium hydroxide etches the surface of aluminum oxide (Al 2O3) at high temperature, generating more unsaturated aluminum coordination centers and hydroxyl groups with reactivity. Second step, chemical grafting (core reaction) The amine group (-NH 2) on 1, 4-Xylylenediamine (XDA) attacks the unsaturated aluminum ion on the surface of aluminum oxide by a lone pair of electrons on the nitrogen atom, forming a stable coordination bond (al≡nal≡n), thereby fixing the organic amine molecule to the inorganic carrier. Third step, oxygen pressure assisted crosslinking The micro-oxygen pressure (0.5-1.0 KPa) environment promotes the oxidation coupling of amino groups, and a stable polyamine network structure is formed on the surface of alumina to prevent the falling of organic components. And finally obtaining the final product, namely the alumina composite material with the surface rich in amino (-NH 2). The material realizes the selective removal of fluorine ions (F -) through electrostatic adsorption after amine group protonation or ligand exchange with aluminum ions. The second aim of the invention is realized by reacting raw materials 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide in a formula ratio for 2-5 h under the oxygen pressure of 0.5-1.0 KPa and the temperature of 150-300 ℃. The third object of the invention is achieved by the application of the defluorination reagent Cg151 in a copper sulfate solution defluorination process. The defluorination reagent Cg151 is prepared by reacting 1, 4-Xylylenediamine (XDA), aluminum oxide and sodium hydroxide for 2-5 hours under the oxygen pressure of 0.5-1.0kPa and the temperature of 150-300 ℃ until the reaction is stopped, wherein the molar ratio of the 1, 4-Xylylenediamine (XDA), the aluminum oxide and the sodium hydroxide is 1-5:1-10:20-100. The defluorination reagent Cg151 has stable chlorine removal performance under the conditions of high acid and high temperature, and has high-efficiency defluorination performance. By adding the defluorination reagent Cg151, the reaction conditions such as pH value, temperature, time and the like are regulated so as to improve the efficiency and stability of fluorine removal, and finally, an environment-friendly and economically feasible treatment scheme is realized. Detailed Description The invention is further illustrated, but is not limited in any way, by the following examples, and any alterations or substitutions based on the teachings of the invention are within the scope of the invention. The defluorination reagent Cg151 is prepared from raw materials of 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide. The molar ratio of the 1, 4-xylylenediamine XDA to the aluminum oxide to the sodium hydroxide is (1-5): 1-10): 20-100. The preparation method of the defluorination reagent Cg151 comprises the step of reacting raw materials 1, 4-xylylenediamine XDA, aluminum oxide and sodium hydroxide in a formula ratio for 2-5 h under the oxygen pressure of 0.5-1.0 KPa and the temperature of 150-300 ℃. The application of the defluorination reagent Cg151 disclosed by the invention is the application of the defluorination reagent Cg151 in a copper sulfate solution defluorination process. The copper sulfate defluorination comprises pretreatment and main reaction steps, and specifically comprises the following steps: A. The pretreatment, namely regulating the pH value of the copper sulfate solution to be treated to 2-5 to obtain a material a; B. And (3) the main reaction is that a defluorination reagent Cg151 is added into the