CN111943251B - Method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material - Google Patents
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Abstract
The invention discloses a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, which comprises the following steps: (1) fully reacting the waste copper-tungsten alloy ground into powder with a nitric acid solution to obtain a copper nitrate solution; (2) then mixing the copper nitrate solution with excessive iodine salt or bromine salt solution, adding reducing agent solution with the concentration of 1-4mol/L for reduction reaction for 1-2h, continuously stirring in the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]‑Or [ CuBr ]2]‑The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 60-80min to react to generate flocculate, filtering the flocculate and cleaning with water for later use; (3) reacting the floc with an alkaline reagent to obtain high-purity Cu2And O. The preparation process is simple and time-saving, the material is economical, and the prepared cuprous oxide can ensure that the yield is more than 98 percent, the purity is about 99 percent, and the highest purity can reach 99.6 percent.
Description
Technical Field
The invention relates to the technical field of preparation and application of inorganic functional materials, in particular to a method for preparing cuprous oxide by taking waste copper-tungsten alloy as a raw material.
Background
Cuprous oxide is a P-type oxide semiconductor material, has good catalytic activity, and has the characteristics of strong adsorption property, low-temperature paramagnetism and the like. The method has wide application in numerous fields such as organic synthesis, novel energy, photolysis of water, sterilization, superconduction and the like. At present, raw materials for preparing cuprous oxide are basically copper acetate or copper nitrate, and then reducing agents such as sodium borohydride, vitamin C, formic acid, glucose and the like are used for preparing cuprous oxide by reduction, so that the production cost is increased to a certain extent. For the problem of production cost, in the prior art, there is a method for recovering and preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, for example, CN201610859960.2 uses nitric acid to leach copper in the waste copper-tungsten alloy for the second time, and then uses sodium sulfite to reduce the copper nitrate to prepare cuprous oxide powder. For example, the yield can be improved by increasing the concentration of the reducing agent, but the purity of cuprous oxide is reduced due to the generation of impurity phase Cu caused by over-reduction of copper ions, and the yield is greatly reduced by decreasing the concentration of the reducing agent, so that a method for preparing high-purity and high-yield cuprous oxide by using the waste copper-tungsten alloy is needed urgently.
Disclosure of Invention
The invention aims to provide a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material comprises the following steps:
(1) firstly, grinding the waste copper-tungsten alloy into micron-sized particles, pouring the micron-sized particles into a nitric acid solution with the concentration of 2-5mol/L for reaction for 50-70min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use after the reaction is finished;
(2) mixing a copper nitrate solution with an excessive iodine salt or bromine salt solution, adding a reducing agent solution with the concentration of 1-4mol/L to perform reduction reaction for 1-2h, continuously stirring in the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]-Or [ CuBr ]2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 60-80min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
this step adds an iodide salt or bromide salt to the solution of copper ions and a reducing agent for reaction, here exemplified by an iodide salt, Cu due to the electron pair2+/CuI/I-Has an electrode potential of about 0.86V, which is much higher than that of Cu2+Cu (0.337V) and Cu2+/Cu+(0.519V), so that iodine ions are introduced into the reduction reaction solution of copper ions, and Cu is caused to occur at the time of reduction reaction2+It is easier for electrons to form CuI precipitates rather than being reduced to Cu or Cu2O, and simultaneously CuI and iodide ions continue to coordinate to generate complex ions [ CuI ] due to excessive iodide salt2]-The specific reaction formula is as follows. On the one hand, the reaction of converting the bivalent copper into the monovalent copper is promoted, so that the content of the monovalent copper in the product is higher, the yield is improved, on the other hand, the generated monovalent copper can be complexed with iodide ions to protect the monovalent copper, and the monovalent copper is prevented from being continuously reduced due to the direct contact of the monovalent copper and a reducing agent in a solutionThe problem of original Cu improves the utilization rate of a copper source and avoids the waste of raw materials. The action principle of bromine salt is similar to that of iodine salt, and electricity is paired with Cu2+/CuBr/Br-Is about 0.67V.
Cu2++2I-+e-＝[CuI2]-
The above first step reaction is a one-step protection method in the step, and although monovalent copper can be effectively protected, the first step reaction contains complex ions [ CuI ] of monovalent copper2]-Still dispersed in the solution, thereby adding anilino compound C6NH2R1R2R3R4R5 and complex ion [ CuI2]-The reaction is carried out as a two-step protection method of the step. The anilino compound is slightly soluble in water, lone pair electrons contained in amino groups of the anilino compound are easily paired with the monovalent copper to form a coordination bond, and iodine ions in complex ions are replaced to form insoluble flocs, so that the monovalent copper compound is effectively separated out from a solution to facilitate subsequent reaction, and the monovalent copper is still protected under the action of the anilino compound, and the specific action principle is shown in figure 1.
(3) Pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxide radical concentration of 1-10mol/L and trichloromethane, and stirring for reacting for 3-5h to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O。
The reaction in step (2) is to obtain a monovalent copper compound with higher yield and purity, and the reaction in this step is to convert all the monovalent copper in the flocs into Cu2O, the conversion of the monovalent copper compound is realized, and the specific reaction formula is as follows.
[Cu(C6NH2R1R2R3R4R5)I]2n+2nOH-＝nCu2O+2nI-+nH2O+2nC6NH2R1R2R3R4R5
Furthermore, the particle size of the micron-sized powder particles is 0.5-10 μm.
The waste copper-tungsten alloy is ground into powder so as to fully perform the stirring reaction with the nitric acid solution, thereby improving the utilization rate of the copper source.
Further, the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is (0.5-1.4): 1.
the Cu in the scrap copper tungsten alloy can be fully reacted in the preferred molar ratio range, while too much or too little nitric acid can result in the waste of one of the reactants.
Further, the iodine salt or bromine salt can be one or a mixture of potassium iodide, sodium bromide and potassium bromide.
Further, the content of the excess iodine salt or bromine salt should be controlled so that the anion and Cu in the copper nitrate solution are in the same2+In a molar ratio of (1.5-5): 1.
i in the preferred molar ratio range-Or Br-Can be complexed with CuI generated by monovalent copper to generate [ CuI2]-The complex ions will dissolve in the aqueous solution, while too little iodide or bromide will cause the formation of CuI precipitate, monovalent copper will be reduced to Cu by direct contact with the reducing agent in solution, and too much iodide or bromide will reduce the rate of reaction.
Further, the reducing agent solution can be one or more of sodium sulfite, ascorbic acid, sodium hypophosphite, sodium citrate, hydrazine hydrate, sodium borohydride, vitamin C, formic acid and glucose.
Further, the R1, R2, R3, R4 and R5 groups in the anilino compound are hydrophobic groups; the hydrophobic group can be a combination of any five of a hydrogen group, an alkyl group having 1 to 10 carbon atoms.
The hydrophobic group in the anilino compound can ensure that the anilino compound can be effectively separated out after CuI forms a coordination compound, and if the anilino compound is hydrophilic, the solubility of the anilino compound in an aqueous solution can be increased, so that the loss of a copper source is caused.
Further, the anilino compound is complexed with a complexing ion [ CuI2]-Or [ CuBr ]2]-In a molar ratio of (2-4): 1.
a slight excess of anilino compound may sufficiently replace the iodide or bromide ions.
Further, the alkaline reagent is one or more of sodium hydroxide, potassium hydroxide, barium hydroxide and ammonia water, and the volume ratio of the water in the alkaline reagent to the trichloromethane is 1: (0.8-2).
Appropriate amount of trichloromethane can dissolve lipophilic anilino compound in the flocculate, so that the alkaline reagent is fully contacted with CuI and reacts to obtain Cu2O。
Further, the drying temperature is 60-70 ℃ and the drying time is 15-25 min; the stirring speed is 500-3000 r/min.
Compared with the prior art, the invention has the following beneficial effects:
(1) the univalent copper compound prepared by the two-step protection method is protected by iodide ions or bromide ions and anilino compounds in the whole process, so that the problem that the univalent copper is reduced into Cu due to over-strong reducibility of a reducing agent in the reduction reaction process is solved, and the final product Cu is improved2The purity of O.
(2) The invention utilizes the electric pair Cu2+/CuI/I-Or Cu2+/CuBr/Br-Has higher electrode potential by introducing excessive bromine salt or iodine salt and controlling iodine or bromine ion and Cu2+In a molar ratio of (1.5-5): 1, on one hand, indirectly protecting the generated monovalent copper and on the other hand, improving the Cu2The yield of O avoids the waste of raw materials.
(3) The materials such as bromine salt, iodine salt, nitric acid and the like used in the invention have wide sources and low prices, the preparation process is simple and time-saving, the waste utilization can be realized only by low cost, and the product with high yield can be obtained, thus the invention has wide application prospect.
Drawings
FIG. 1 is a schematic representation of the reaction of a complex ion of the present invention with an anilino compound.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, which comprises the following steps:
(1) firstly, grinding waste copper-tungsten alloy into micron-sized particles, pouring the particles into a nitric acid solution with the concentration of 2mol/L for reaction for 50min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use after the reaction is finished;
(2) mixing a copper nitrate solution with an excessive iodine salt solution, adding a reducing agent solution with the concentration of 1mol/L for reduction reaction for 2 hours, continuously stirring the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 60min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
(3) pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxide radical concentration of 1mol/L and trichloromethane, stirring and reacting for 5 hours to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O。
Wherein the particle size of the micron-sized powder particles is 0.5 mu m; the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is 0.5: 1; the iodine salt is potassium iodide; the content of the excess iodonium salt should be controlled in such a way that the iodonium ion and Cu in the copper nitrate solution are controlled2+In a molar ratio of 1.5: 1; the reducing agent solution is sodium sulfite; the anilino compound is mesitylene; the anilino compound is complexed with a complexing ion [ CuI2]-In a molar ratio of 2: 1; the alkaline reagent is sodium hydroxide, and the volume ratio of water to trichloromethane in the alkaline reagent is 1: 0.8; the drying temperature is 60 ℃ and the drying time is 15 min; the stirring speed is 500 r/min.
Example two
The invention provides a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, which comprises the following steps:
(1) firstly, grinding waste copper-tungsten alloy into micron-sized particles, pouring the particles into a nitric acid solution with the concentration of 5mol/L for reaction for 50min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use;
(2) mixing a copper nitrate solution with an excessive iodine salt solution, adding a reducing agent solution with the concentration of 4mol/L to perform reduction reaction for 1h, continuously stirring the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 80min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
(3) pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxide radical concentration of 10mol/L and trichloromethane, stirring and reacting for 3 hours to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O。
Wherein the particle size of the micron-sized powder particles is 10 mu m; the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is 1.4: 1; the iodine salt is potassium iodide; the content of the excess iodonium salt should be controlled in such a way that the iodonium ion and Cu in the copper nitrate solution are controlled2+In a molar ratio of 5: 1; the reducing agent solution is sodium sulfite; the anilino compound is mesitylene; the anilino compound is complexed with a complexing ion [ CuI2]-In a molar ratio of 4: 1; the alkaline reagent is sodium hydroxide, and the volume ratio of water to trichloromethane in the alkaline reagent is 1: 2; the drying temperature is 70 ℃ and the drying time is 25 min; the stirring speed is 3000 r/min.
EXAMPLE III
The invention provides a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, which comprises the following steps:
(1) firstly, grinding waste copper-tungsten alloy into micron-sized particles, pouring the particles into a nitric acid solution with the concentration of 3mol/L for reaction for 60min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use after the reaction is finished;
(2) mixing copper nitrate solution with excessive iodine salt solution, adding reducing agent solution with the concentration of 2mol/L for reduction reaction for 1.5h, continuously stirring in the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 70min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
(3) pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxyl concentration of 4mol/L and trichloromethane, and stirring for reacting for 4 hours to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O。
Wherein the particle size of the micron-sized powder particles is 3 μm; the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is 1.2: 1; the iodine salt is potassium iodide; the content of the excess iodonium salt should be controlled in such a way that the iodonium ion and Cu in the copper nitrate solution are controlled2+In a molar ratio of 3: 1; the reducing agent solution is sodium sulfite; the anilino compound is mesitylene; the anilino compound is complexed with a complexing ion [ CuI2]-In a molar ratio of 3: 1; the alkaline reagent is sodium hydroxide, and the volume ratio of water to trichloromethane in the alkaline reagent is 1: 1.5; the drying temperature is 65 ℃ and the drying time is 20 min; the stirring speed is 1000 r/min.
Example four
The invention provides a method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material, which comprises the following steps:
(1) firstly, grinding waste copper-tungsten alloy into micron-sized particles, pouring the particles into a nitric acid solution with the concentration of 3mol/L for reaction for 60min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use after the reaction is finished;
(2) mixing a copper nitrate solution with an excessive bromine salt solution, adding a reducing agent solution with the concentration of 2mol/L to perform reduction reaction for 1.5h, continuously stirring the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuBr ] after the reaction is finished2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 70min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
(3) pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxyl concentration of 4mol/L and trichloromethane, and stirring for reacting for 4 hours to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O。
Wherein the particle size of the micron-sized powder particles is 3 μm; the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is 1.2: 1; the bromine salt is potassium bromide; the content of the excess bromine salt should be controlled so that the bromide ions and Cu in the copper nitrate solution are in the excess2+In a molar ratio of 3: 1; the reducing agent solution is sodium sulfite; the anilino compound is mesitylene; the anilino compound is complexed with a complexing ion [ CuBr ]2]-In a molar ratio of 3: 1; the alkaline reagent is sodium hydroxide, and the volume ratio of water to trichloromethane in the alkaline reagent is 1: 1.5; the drying temperature is 65 ℃ and the drying time is 20 min; the stirring speed is 1000 r/min.
The electrode potential in the present invention is obtained by assembling each pair of electrodes and a standard hydrogen electrode into a galvanic cell and measuring the electromotive force of each galvanic cell, and since the electrode potential of the standard hydrogen electrode is defined as 0V, the measured electromotive force is the electrode potential of each pair of electrodes, wherein each electrode is in a standard state, the concentration is 1mol/L in the case of an ionic solution, 100kPa in the case of a gas, and the temperature is 298.15K. In order to test the superiority and inferiority of the preparation methods of the examples, the yield and purity of each cuprous oxide were respectively tested by the present invention. The method for testing the yield is to calculate the mass ratio of the product cuprous oxide to the copper element in the raw material waste copper-tungsten alloy, wherein the method for testing the quality of the cuprous oxide in the product and the quality of the copper element in the waste copper-tungsten alloy is to fully react and dissolve the copper in the product by using 5mol/L nitric acid, calculate the mass difference before and after the reaction, and calculate the quality of the copper element in the cuprous oxide by using the atomic mass ratio; and the purity is obtained by calculating the ratio of the mass difference of the product before and after dissolution to the product mass, in order to verify the purity of the cuprous oxide, the invention also tests an experiment for cuprous oxide photocatalytic explanation of methyl orange, wherein the usage amount of the product is 0.05g, the reaction time is 3h, the concentration of the methyl orange is 5mg/L, and the purity of the cuprous oxide in the product can be judged by calculating the degradation rate of the methyl orange.
Through comparative experiments on the four groups of examples, the cuprous oxide with excellent purity and performance can be prepared in each group of examples, and specific data are shown in table 1. The cuprous oxide prepared by the method can ensure that the yield is more than 98%, the purity is about 99%, the methyl orange has higher purity according to the degradation rate, wherein the purity of the third example is 99.6% at most, and the catalytic performance is optimal.
TABLE 1
Comparative example 1: the difference from example three is that potassium iodide is replaced by potassium chloride. Due to Cu2+/CuCl/Cl-About 0.55V, which is comparable to Cu+The electrode potential of/Cu (0.52V) is relatively close, so [ CuCl ] exists in the reduction reaction process2]-But also accompanied by the formation of elemental Cu, resulting in Cu in the product2The purity of O is reduced.
Comparative example 2: the difference from example three is that potassium iodide was replaced with potassium nitrate. Since the introduced potassium nitrate does not participate in the reaction, the reaction is carried out on the final Cu2The yield and purity of O are not improved, so that the yield and purity are greatly reduced.
Comparative example 3: the difference from the third embodiment is that Cu2+The molar ratio to iodide ion is 3: 1. cu is caused because excessive copper ions cause the formation of CuI precipitates, which are subsequently reduced to copper2The O purity is reduced.
Comparative example 4: the difference from example three is that the reaction was carried out without addition of an iodide salt. Electric pair Cu due to lack of high electrode potential2+/CuI/I-Function, no generation of transitional complex ions [ CuI2]-The reaction with subsequent anilino compound can not be carried out, and simultaneously, a large amount of simple substance Cu is generated during the reduction reaction, so that the final product Cu is reduced2Both the yield and purity of O will decrease.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A method for preparing cuprous oxide by using waste copper-tungsten alloy as a raw material is characterized by comprising the following steps:
(1) firstly, grinding the waste copper-tungsten alloy into micron-sized particles, pouring the micron-sized particles into a nitric acid solution with the concentration of 2-5mol/L for reaction for 50-70min, continuously stirring in the reaction process to ensure that the reaction is fully carried out, and filtering impurity tungsten and removing impurity tungsten to obtain a copper nitrate solution for later use after the reaction is finished;
(2) mixing a copper nitrate solution with an excessive iodine salt or bromine salt solution, adding a reducing agent solution with the concentration of 1-4mol/L to perform reduction reaction for 1-2h, continuously stirring in the reaction process, and obtaining the copper nitrate solution containing complex ions [ CuI ] after the reaction is finished2]-Or [ CuBr ]2]-The mixed solution of (1); adding an anilino compound C to the mixed solution6NH2Stirring R1R2R3R4R5 for 60-80min to react to generate flocculate, filtering the flocculate and cleaning with water for later use;
(3) pouring the cleaned flocculate into a mixed solution of an alkaline reagent with the hydroxide radical concentration of 1-10mol/L and trichloromethane, and stirring for reacting for 3-5h to obtain Cu2Precipitating with O, filtering the precipitate, washing with water, and oven drying to obtain high-purity Cu2O；
The R1, R2, R3, R4 and R5 groups in the anilino compound are hydrophobic groups; the hydrophobic group is a combination of any five of a hydrogen group and an alkyl group containing 1-10 carbon atoms.
2. The method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the grain size of the micron-sized powder particles is 0.5-10 mu m.
3. The method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the molar ratio of copper in the micron-sized powder particles to nitrate in the nitric acid solution is (0.5-1.4): 1.
4. the method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the iodine salt or bromine salt is one or a mixture of potassium iodide, sodium bromide and potassium bromide.
5. The method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the content of the excess iodine salt or bromine salt should be controlled so that the anion and Cu in the copper nitrate solution are in the same2+In a molar ratio of (1.5-5): 1.
6. the method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the reducing agent solution is one or more of sodium sulfite, ascorbic acid, sodium hypophosphite, sodium citrate, hydrazine hydrate, sodium borohydride, vitamin C, formic acid and glucose.
7. The method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the anilino compound is complexed with a complexing ion [ CuI2]-Or [ CuBr ]2]-In a molar ratio of (2-4): 1.
8. the method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the alkaline reagent is one or more of sodium hydroxide, potassium hydroxide, barium hydroxide and ammonia water, and the volume ratio of the water in the alkaline reagent to the trichloromethane is 1: (0.8-2).
9. The method for preparing cuprous oxide by using waste copper-tungsten alloy as raw material according to claim 1, characterized by comprising the following steps: the drying temperature is 60-70 ℃ and the drying time is 15-25 min; the stirring speed is 500-3000 r/min.
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