CN115180649A - Method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore - Google Patents
Method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore Download PDFInfo
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- CN115180649A CN115180649A CN202211022621.0A CN202211022621A CN115180649A CN 115180649 A CN115180649 A CN 115180649A CN 202211022621 A CN202211022621 A CN 202211022621A CN 115180649 A CN115180649 A CN 115180649A
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- 229940073609 bismuth oxychloride Drugs 0.000 title claims abstract description 62
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 title claims abstract description 62
- IZIJITWQULSWFA-UHFFFAOYSA-N [Bi]=S.[Mo] Chemical compound [Bi]=S.[Mo] IZIJITWQULSWFA-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000002386 leaching Methods 0.000 claims abstract description 35
- 239000002244 precipitate Substances 0.000 claims abstract description 23
- 239000000047 product Substances 0.000 claims abstract description 19
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000605 extraction Methods 0.000 claims abstract description 17
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 14
- 238000001354 calcination Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000008346 aqueous phase Substances 0.000 claims abstract description 10
- 239000012074 organic phase Substances 0.000 claims abstract description 10
- 239000003929 acidic solution Substances 0.000 claims abstract description 9
- 239000003085 diluting agent Substances 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 239000003350 kerosene Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 230000009469 supplementation Effects 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims abstract description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 15
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 5
- 238000003756 stirring Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- JHXKRIRFYBPWGE-UHFFFAOYSA-K bismuth chloride Chemical compound Cl[Bi](Cl)Cl JHXKRIRFYBPWGE-UHFFFAOYSA-K 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 229910000416 bismuth oxide Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229940068603 bismuth chloride oxide Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- DKUYEPUUXLQPPX-UHFFFAOYSA-N dibismuth;molybdenum;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Mo].[Mo].[Bi+3].[Bi+3] DKUYEPUUXLQPPX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
- C01G29/003—Preparations involving a liquid-liquid extraction, an adsorption or an ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G29/00—Compounds of bismuth
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention provides a method for preparing high-purity bismuth oxychloride by utilizing molybdenum-bismuth sulfide ore, which takes the molybdenum-bismuth sulfide ore as a raw material, and obtains the high-purity bismuth oxychloride after acid leaching, extraction, back extraction and calcination in turn, and comprises the following specific steps: grinding molybdenum-bismuth sulfide ore to 95-300 meshes, adding an acidic solution and an auxiliary leaching agent, leaching at 50-95 ℃, and then carrying out solid-liquid separation to obtain a leaching solution and leaching residues; extracting and separating the leachate by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate for leaching after acid supplementation; back extracting the loaded organic phase obtained in the extraction step by using deionized water or dilute ammonia water to transfer bismuth into the aqueous phase to form bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at high temperature to obtain a bismuth oxychloride product; the bismuth oxychloride obtained by the method has high purity, short process route, simple process conditions in the preparation process and easy realization of industrialization.
Description
Technical Field
The invention relates to the field of bismuth oxychloride preparation, in particular to a method for preparing high-purity bismuth oxychloride from molybdenum bismuth sulfide ore.
Background
Bismuth oxychloride (BiOCl) has received wide attention as a novel semiconductor material with excellent chemical stability, good electron transport ability, and high light activity, and is considered to be a novel photocatalyst with good application prospects. The traditional bismuth oxychloride is prepared by taking bismuth chloride or bismuth oxide as a raw material, for example, zhang Kun et al take bismuth chloride as a raw material, stir and heat the raw material under the condition of adding citric acid, and successfully prepare the bismuth oxychloride catalyst; patent CN2010102232151 discloses a method for preparing bismuth oxychloride, which comprises dissolving bismuth chloride in dilute hydrochloric acid, adding urea and sodium carbonate, and reacting to obtain bismuth oxychloride product.
The traditional preparation of bismuth oxychloride needs high-purity bismuth chloride or bismuth oxide as raw materials, at present, bismuth chloride, bismuth oxide, bismuth metal and the like are mainly extracted from bismuth aurate or bismuth molybdate ore mixed ore, and the preparation method has the disadvantages of complex production process, low resource recovery and utilization rate, long process and high cost. Bismuth, a rare metal, has a global reserve of only about 33 ten thousand tons, which is slightly lower than 40 ten thousand tons of silver. Therefore, how to economically and efficiently develop and utilize bismuth resources is a problem which needs to be solved at present.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a method for preparing high-purity bismuth oxychloride by using molybdenum-bismuth sulfide ore.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for preparing high-purity bismuth oxychloride by using molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, adding an acidic solution and an auxiliary leaching agent, leaching at 50-95 ℃, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
s2, extracting and separating the leachate by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water or dilute ammonia water, transferring bismuth to the aqueous phase to form bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at high temperature to obtain a bismuth oxychloride product.
In some embodiments, in step S1, the concentration of the acidic solution is 2 to 10mol/L.
In some embodiments, the acidic solution is sulfuric acid and/or hydrochloric acid.
In some embodiments, the leaching aid is at least one of sodium chloride, potassium chloride, and magnesium chloride.
In some embodiments, the lixiviant concentration is 0.5 to 5mol/L.
In some embodiments, the dilute ammonia concentration is 10 to 100g/L.
In some embodiments, in step S3, the calcination temperature is 300 to 500 ℃.
In some embodiments, in the step S1, the bismuth in the ore can be leached better by stirring and leaching at a speed of 150 to 200r/min during the leaching process.
In some embodiments, in step S1, the liquid-to-solid ratio of the acidic solution to the bismuth-molybdenum sulfide ore is 2 to 10L:1kg.
In some embodiments, in step S1, the leaching time is 2 to 10 hours.
In some embodiments, the purity of the bismuth oxychloride is greater than or equal to 99.5%.
Compared with the prior art, the invention has the following beneficial effects:
the invention takes molybdenum bismuth sulfide ore as raw material, and high-purity bismuth oxychloride with the purity of more than or equal to 99.5 percent can be obtained after acid leaching, extraction, back extraction and high-temperature calcination. According to the method, bismuth is dissolved in an acid solution in an acid leaching mode based on the mineralization characteristic of molybdenum-bismuth sulfide ore, so that bismuth is leached, and then leachate is extracted and separated by a specific extraction system; and then carrying out back extraction on the loaded organic phase by using deionized water or dilute ammonia water to transfer bismuth into the aqueous phase to form a bismuth oxychloride precipitate, and finally calcining the washed bismuth oxychloride precipitate at high temperature to obtain the high-purity bismuth oxychloride.
The purity of the bismuth oxychloride product obtained by the method is more than or equal to 99.5 percent; and the process route is short, the process conditions in the preparation process are simple, and the industrialization is easy to realize.
In addition, in the extraction process, the obtained raffinate can be recycled for leaching the molybdenum-bismuth sulfide ore after being added with acid, so that the recycling of the solution is realized, and the production cost is saved.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, and then, mixing the obtained product in a liquid-solid ratio of 4L: adding 5mol/L hydrochloric acid and 0.5mol/L magnesium chloride into 1kg of the mixed solution, stirring and leaching at the temperature of 70 ℃ at the speed of 200r/min for 4 hours, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water, transferring bismuth into the aqueous phase to form a bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining the precipitate at the high temperature of 300 ℃ for 1 hour to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.6%.
Example 2
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, and then carrying out liquid-solid ratio of 6L: adding 1kg of hydrochloric acid with the concentration of 4mol/L and 1mol/L of sodium chloride, stirring and leaching for 4 hours at the temperature of 50 ℃ at the speed of 180r/min, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water, transferring bismuth to the aqueous phase to form bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining the precipitate at the high temperature of 300 ℃ for 2 hours to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.8%.
Example 3
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding the molybdenum-bismuth sulfide ore until the molybdenum-bismuth sulfide ore is more than or equal to 95 meshes and less than or equal to 300 meshes, and then mixing the molybdenum-bismuth sulfide ore and the molybdenum-bismuth sulfide ore according to a liquid-solid ratio of 9L: adding 3mol/L hydrochloric acid and 2mol/L magnesium chloride into 1kg of the mixed solution, stirring and leaching at the temperature of 80 ℃ at the speed of 300r/min for 10 hours, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water, transferring bismuth into the aqueous phase to form a bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining the precipitate at 350 ℃ for 1 hour to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.9%.
Example 4
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, and then carrying out liquid-solid ratio of 2L: adding 5mol/L hydrochloric acid and 5mol/L potassium chloride into 1kg of the mixed solution, stirring and leaching at the temperature of 95 ℃ at the speed of 150r/min for 2 hours, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water, transferring bismuth into the aqueous phase to form a bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at the high temperature of 500 ℃ for 30min to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.8%.
Example 5
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, and then, mixing the obtained product in a liquid-solid ratio of 4L: adding 2mol/L sulfuric acid and 5mol/L sodium chloride into 1kg of the mixed solution, stirring and leaching at the temperature of 90 ℃ at the speed of 200r/min for 8 hours, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using dilute ammonia water with the concentration of 10g/L to transfer bismuth to the aqueous phase to form a bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at the high temperature of 500 ℃ for 30min to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.8%.
Example 6
As shown in fig. 1, a method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore comprises the following steps:
s1, grinding the molybdenum-bismuth sulfide ore until the molybdenum-bismuth sulfide ore is more than or equal to 95 meshes and less than or equal to 300 meshes, and then mixing the molybdenum-bismuth sulfide ore and the molybdenum-bismuth sulfide ore according to a liquid-solid ratio of 3L: adding 5mol/L hydrochloric acid and 1mol/L magnesium chloride into 1kg of the mixed solution, stirring and leaching at the temperature of 70 ℃ at the speed of 200r/min for 5 hours, and then carrying out solid-liquid separation to obtain leachate and leaching residues;
s2, extracting and separating the leachate obtained in the step S1 by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using dilute ammonia water with the concentration of 100g/L to transfer bismuth to the aqueous phase to form bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at the high temperature of 400 ℃ for 30min to obtain a bismuth oxychloride product. Through detection, the purity of the bismuth oxychloride product obtained in the embodiment is 99.7%.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for preparing high-purity bismuth oxychloride from molybdenum-bismuth sulfide ore is characterized by comprising the following steps:
s1, grinding molybdenum-bismuth sulfide ore to 95-300 meshes, adding an acidic solution and an auxiliary leaching agent, leaching at 50-95 ℃, and carrying out solid-liquid separation to obtain a leaching solution and leaching residues;
s2, extracting and separating the leachate by using an extraction system with N1923 as an extracting agent and sulfonated kerosene as a diluent, and returning the raffinate to the step S1 after acid supplementation;
and S3, back-extracting the loaded organic phase in the step S2 by using deionized water or dilute ammonia water to transfer bismuth to the aqueous phase to form bismuth oxychloride precipitate, filtering and washing the precipitate, and calcining at high temperature to obtain a bismuth oxychloride product.
2. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein in the step S1, the concentration of the acidic solution is 2 to 10mol/L.
3. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein the acidic solution is sulfuric acid and/or hydrochloric acid.
4. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein the leaching aid is at least one of sodium chloride, potassium chloride and magnesium chloride.
5. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 4, wherein the concentration of the leaching agent is 0.5-5 mol/L.
6. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein the concentration of the dilute ammonia water is 10-100 g/L.
7. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein the calcining temperature in step S3 is 300-500 ℃.
8. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein in step S1, the liquid-solid ratio of the acidic solution to the molybdenum-bismuth sulfide ore is 2-10L: 1kg.
9. The method for preparing bismuth oxychloride from molybdenum-bismuth sulfide ore according to claim 1, wherein the purity of the bismuth oxychloride is not less than 99.5%.
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