Nano basic copper sulfate powder and preparation method thereof

Abstract

The invention provides nano basic copper sulfate powder and a preparation method thereof. The nano basic copper sulfate powder is in a sheet shape, the long axis size of the nano basic copper sulfate powder is 1-2 microns, the short axis size of the nano basic copper sulfate powder is 60-150 nm, the thickness of the nano basic copper sulfate powder is 10-30 nm, and the specific surface area of the nano basic copper sulfate powder is 10-32 m < 2 > / g. The preparation method of the nano basic copper sulfate powder mainly comprises the following steps: dissolving, filtering, dispersing, synthesizing, carrying out solid-liquid separation, cleaning and carrying out spray drying. The preparation method of the nano basic copper sulfate powder is simple in technological process, and compared with micron basic copper sulfate produced by a traditional method, the produced basic copper sulfate can be nano-scale and high in specific surface area by changing the types of auxiliaries, controlling the PH value and the temperature and adopting a two-stage heating mode; and meanwhile, mass production can be realized, the yield is high, industrial large-scale production is easy, the production cost is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of nano materials, and in particular to a nano basic copper sulfate powder and a preparation method thereof. Background Art

[0002] As the application of nanomaterials in the agricultural field gradually develops towards plant protection, people are more urgently in need of new nanomaterials with drug resistance, bactericidal properties, and environmental safety. Nano basic copper sulfate has the excellent characteristics of nanomaterials such as small size effect, surface effect, and quantum tunneling effect. At the same time, it also inherits the bactericidal, antiseptic, and plant resistance-inducing properties of copper. It has been widely used in pesticides, medicine, bactericidal and antiseptic properties, and chemical industry.

[0003] Although nano basic copper sulfate has many advantages, the existing preparation methods cannot achieve industrial production of nano basic copper sulfate, and the basic copper sulfate produced is mostly micron-sized, which cannot meet the existing needs. Therefore, designing a preparation process for nano basic copper sulfate that can produce nano basic copper sulfate with small particle size and can achieve mass production is the focus of current research. Summary of the invention

[0004] The present invention aims to provide a nano basic copper sulfate powder and a preparation method thereof, which is achieved by the following technical solutions:

[0005] A nano basic copper sulfate powder, the nano basic copper sulfate powder is in the shape of a flake, the major axis size is 1-2 μm, the minor axis size is 60-150 nm, the thickness is 10-30 nm, and the specific surface area is 10-32 m 2 / g.

[0006] The present invention also includes a method for preparing nano basic copper sulfate powder, comprising the following steps:

[0007] Step 1: Heat the aqueous solution to about 60-70°C, dissolve copper sulfate and pickling agent in the aqueous solution, and then adjust the solution temperature to 65-75°C until it is completely dissolved. Stir during the dissolution process to prevent crystallization blockage, and filter the solution for later use;

[0008] Furthermore, the pickling agent is one or a combination of two of sodium acetate, potassium acetate, ammonium acetate, and sodium acetate; the mass fraction of the pickling agent is 1 to 10%, and the mass fraction of the copper sulfate is 5 to 25%; the weight ratio of the copper sulfate to the pickling agent is 1:1-5:1.

[0009] Step 2: Add a dispersant to the filtrate of step 1 and stir to obtain a uniform dispersion;

[0010] Furthermore, the dispersant is one or a combination of two of PVPK30, polyethylene glycol, polyvinyl alcohol, and sodium lignin sulfonate, and the mass fraction of the dispersant is 1 to 10%.

[0011] Step 3: Cool the dispersion obtained in step 2 to below 65°C, then slowly add an alkaline precipitant thereto, stir and mix evenly, control the stirring temperature below 55°C, and control the pH value to 6-8;

[0012] Furthermore, the alkaline precipitant is one or a combination of two of ammonium carbonate, ammonium sulfate, sodium hydroxide, and ammonia water, and the volume fraction of the alkaline precipitant is 1 to 20%.

[0013] Step 4: heating the mixed solution in step 3 to 60-80°C, maintaining the temperature at 60-80°C, and reacting for 0.5-3h to obtain a reaction-completed material.

[0014] Step 5: performing multiple solid-liquid separation and washing on the material in step 4 to obtain a solid-liquid mixture with a solid content of 10-35%;

[0015] Step 6: placing the solid-liquid mixture in step 5 into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder.

[0016] The invention has the following beneficial effects: the preparation method of the nano basic copper sulfate powder has a simple process flow, and compared with the micron-level basic copper sulfate produced by the traditional method, by changing the type of auxiliary agent, controlling the pH value and the temperature, and adopting a two-stage heating method, the basic copper sulfate produced can be nano-level and have a high specific surface area, and can also achieve mass production with a high yield, is easy to industrialize and mass produce, and is helpful to reduce production costs and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a process flow diagram of the method for preparing nano basic copper sulfate powder of the present invention;

[0018] Figure 2 This is a scanning electron microscope image of nano basic copper sulfate powder; DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely in conjunction with specific embodiments below. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them.

[0020] The present invention provides a method for preparing nano basic copper sulfate powder, comprising the following steps:

[0021] Example 1

[0022] Step 1: After heating the aqueous solution to 65°C, copper sulfate and sodium acetate are dissolved in the aqueous solution as raw materials, and then the solution temperature is adjusted to 75°C until it is completely dissolved. Stirring is applied during the dissolution process to prevent crystallization blockage, and the solution is filtered for standby use; the weight ratio of copper sulfate to sodium acetate is 11:3, the concentration of copper sulfate is 2.5 mol / L, and the stirring speed is 800r / min;

[0023] Step 2: Using sodium lignin sulfonate and PVPK30 as dispersants, add the dispersants to the filtrate of step 1 and stir to obtain a uniform dispersion;

[0024] Step 3: Cool the dispersion obtained in step 2 to below 65°C, then slowly add ammonia water as an alkaline precipitant to the dispersion, the ammonia content is 25%, stir and mix evenly, control the stirring temperature below 55°C, and control the pH value to 8;

[0025] Step 4: The mixed solution in step 3 is heated to 70°C, and then maintained at 70°C for 2 hours to obtain a material having completed the reaction;

[0026] Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 12 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 8 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0027] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0028] The scanning electron microscope image of the nano basic copper sulfate powder prepared by the preparation method of this embodiment is shown in the attached figure. Figure 2 shown.

[0029] Example 2

[0030] Step 1: After heating the aqueous solution to 70° C., copper sulfate and potassium acetate are used as raw materials, potassium acetate is weighed at 60% of the mass of nano basic copper sulfate, copper sulfate and potassium acetate are dissolved in the aqueous solution, and then the solution temperature is adjusted to 75° C. until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and the dissolved solution is filtered for standby use; the concentration of copper sulfate is 2.5 mol / L, and the stirring speed is 800 r / min;

[0031] Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing 12% and 36% of the nano basic copper sulfate output (mass), respectively, adding the dispersant PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring to obtain a uniform dispersion at a stirring speed of 800 r / min;

[0032] Step 3: Cool the dispersion obtained in step 2 to below 65° C., use ammonium carbonate as a precipitant, weigh 80% of the nano basic copper sulfate output (mass), slowly add the ammonium carbonate into the dispersion, stir and mix evenly, the stirring speed is 800 r / min, the stirring temperature is controlled below 55° C., and the pH value is controlled to be 8;

[0033] Step 4: heating the mixed solution in step 3 to 80°C, maintaining the temperature at 80°C for 2 hours to obtain a material having completed the reaction;

[0034] Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0035] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0036] Example 3

[0037] Step 1: After heating the aqueous solution to 65° C., copper sulfate and potassium acetate are used as raw materials, potassium acetate is weighed at 60% of the output (mass) of nano basic copper sulfate, copper sulfate and potassium acetate are dissolved in the aqueous solution, and then the solution temperature is adjusted to 75° C. until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 2.5 mol / L, and the stirring speed is 800 r / min;

[0038] Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing 12% and 36% of the mass of nano basic copper sulfate respectively, adding the dispersant PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min;

[0039] Step 3: Cool the dispersion in step 2 to below 65° C., use ammonium sulfate and sodium hydroxide as alkaline precipitants, weigh sodium hydroxide to prepare a sodium hydroxide solution with 75% of the output (mass) of nano basic copper sulfate, add ammonium sulfate to the sodium hydroxide solution to prepare a reaction solution with a concentration ratio of ammonium sulfate to sodium hydroxide of 2:1; add the reaction solution to the dispersion in step 2 and stir to mix evenly, the stirring speed is 800 r / min, the stirring temperature is controlled below 55° C., and the pH value is controlled to be 8;

[0040] Step 4: The mixed solution in step 3 is heated to 70°C, maintained at 70°C, and the reaction time is 2h to obtain a material after the reaction is completed;

[0041] Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 12 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 8 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0042] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0043] Example 4

[0044] Step 1: After heating the aqueous solution to 65° C., copper sulfate and ammonium acetate are used as raw materials, ammonium acetate is weighed at 60% of the mass of nano basic copper sulfate, copper sulfate and potassium acetate are dissolved in the aqueous solution, and then the solution temperature is adjusted to 75° C. until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 2.5 mol / L, and the stirring speed is 800 r / min;

[0045] Step 2: Using PVPK30 and sodium lignin sulfonate as dispersants, weigh 12% and 36% of the nano basic copper sulfate output (mass) of the dispersant PVPK30 and sodium lignin sulfonate, respectively, add them into the filtrate of step 1 and stir at a stirring speed of 800 r / min;

[0046] Step 3: Cool the dispersion in step 2 to below 65° C., use ammonium carbonate as an alkaline precipitant, weigh ammonium carbonate at 80% of the output (mass) of nano basic copper sulfate, add the ammonium carbonate to the dispersion in step 2, stir and mix evenly, the stirring speed is 800 r / min, the stirring temperature is controlled below 55° C., and the pH value is controlled to be 8;

[0047] Step 4: The mixed solution in step 3 is heated to 70°C, maintained at 70°C, and the reaction time is 2h to obtain a material after the reaction is completed;

[0048] Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 12 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 8 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0049] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0050] Example 5

[0051] Step 1: After heating the aqueous solution to 65° C., copper sulfate and sodium acetate are used as raw materials, sodium acetate is weighed at 60% of the mass of nano basic copper sulfate, copper sulfate and potassium acetate are dissolved in the aqueous solution, and then the solution temperature is adjusted to 75° C. until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 2.5 mol / L, and the stirring speed is 800 r / min;

[0052] Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing 12% and 36% of the nano basic copper sulfate output (mass), respectively, adding the dispersants PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min;

[0053] Step 3: Cool the dispersion in step 2 to below 65°C, use ammonium sulfate and ammonia water as alkaline precipitants, measure ammonia water with a content of 25%, weigh ammonium sulfate at 105% of the output (mass) of nano basic copper sulfate, slowly add ammonium sulfate to the ammonia solution to prepare a reaction solution with a concentration ratio of ammonium sulfate to ammonia water of 2:1, add the reaction solution to the dispersion in step 2, stir and mix evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 8;

[0054] Step 4: The mixed solution in step 3 is heated to 70°C, maintained at 70°C, and the reaction time is 2h to obtain a material after the reaction is completed;

[0055] Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 12 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 8 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0056] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0057] Example 6

[0058] Step 1: After heating the aqueous solution to 65° C., copper sulfate and sodium acetate are used as raw materials, sodium acetate is weighed at 60% of the mass of nano basic copper sulfate, copper sulfate and sodium acetate are dissolved in the aqueous solution, and then the solution temperature is adjusted to 75° C. until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 2.5 mol / L, and the stirring speed is 800 r / min;

[0059] Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing 12% and 36% of the nano basic copper sulfate output (mass), respectively, adding the dispersants PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min;

[0060] Step 3: Cool the dispersion in step 2 to below 65°C, use ammonium sulfate and ammonia water as alkaline precipitants, measure ammonia water with a content of 25%, weigh ammonium sulfate at 105% of the output (mass) of nano basic copper sulfate, slowly add ammonium sulfate to the ammonia solution to prepare a reaction solution with a concentration ratio of ammonium sulfate to ammonia water of 2:1, add the reaction solution to the dispersion in step 2, stir and mix evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 8;

[0061] Step 4: None

[0062] Step 5: The material after the reaction in step 3 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 12 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 8 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained;

[0063] Step 6: The solid-liquid mixture with a solid content of 10% in step 5 is put into a modification tank, and then put into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

[0064] The parameters of the nano basic copper sulfate prepared in several embodiments of the present invention are compared as follows:

[0065]

[0066]

[0067] Compared with the micron-sized basic copper sulfate produced by the traditional method, the basic copper sulfate prepared by the preparation method of the above embodiment can be nanometer-sized and have a high specific surface area by changing the type of auxiliary agent, controlling the pH value and temperature, and adopting a two-stage heating method. At the same time, mass production can be achieved with a high yield, which helps to reduce production costs and improve economic benefits.

[0068] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0069] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A nano basic copper sulfate powder, characterized in that: The nano basic copper sulfate powder is in the form of a flake, with a major axis size of 1-2 μm, a minor axis size of 60-150 nm, a thickness of 10-30 nm, and a specific surface area of ​​10-32 m 2 / g.

2. A method for preparing the nano basic copper sulfate powder as claimed in claim 1, characterized in that: The following steps are involved: Step 1: heating the aqueous solution to about 60-70°C, dissolving copper sulfate and a pickling agent into the aqueous solution, and then adjusting the solution temperature to 65-75°C until completely dissolved, stirring is applied during the dissolution process to prevent crystallization blockage, and filtering the solution for standby use; the pickling agent is one or a combination of two of sodium acetate, potassium acetate, ammonium acetate, and sodium acetate; the weight ratio of the copper sulfate to the pickling agent is 1:1-5:1; Step 2: adding a dispersant to the filtrate of step 1 and stirring to obtain a uniform dispersion; the dispersant is one or a combination of two of PVPK30, polyethylene glycol, polyvinyl alcohol, and sodium lignin sulfonate; Step 3: Cool the dispersion obtained in step 2 to below 65° C., then add an alkaline precipitant to the dispersion, stir and mix evenly, control the stirring temperature to below 55° C., and control the pH value to be 6-8; the alkaline precipitant is one or a combination of two of ammonium carbonate, ammonium sulfate, sodium hydroxide, and ammonia water; Step 4: heating the mixed solution in step 3 to 60-80°C, maintaining the temperature at 60-80°C, and reacting for 0.5-3h to obtain a material having completed the reaction; Step 5: subjecting the material in step 4 to multiple solid-liquid separations and pure water washings to obtain a solid-liquid mixture with a solid content of 10-35%; Step 6: placing the solid-liquid mixture in step 5 into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder.

3. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: Step 1: After heating the aqueous solution to 65° C., copper sulfate and sodium acetate are dissolved in the aqueous solution as raw materials, and the solution is filtered for standby use; the weight ratio of the copper sulfate to the sodium acetate is 11:3, the concentration of the copper sulfate is 1-3 mol / L, and the stirring speed is 800 r / min; Step 2: sodium lignin sulfonate and PVPK30 are added as dispersants to the filtrate of step 1, and stirred to obtain a uniform dispersion, wherein the weight ratio of sodium lignin sulfonate to PVPK30 is 2:1; Step 3: Cool the dispersion obtained in step 2 to below 65°C, then add ammonia water as an alkaline precipitant to the dispersion, the ammonia content is 10%-28%, stir and mix evenly, control the stirring temperature below 55°C, and control the pH value to 6-8; Step 4: heating the mixed solution in step 3 to 65-70°C, maintaining the temperature at 65-70°C for 1.5-2h to obtain a material having completed the reaction; Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10% is obtained; Step 6: Put the solid-liquid mixture in step 5 into a modification tank, and then put it into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

4. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: Step 1: After heating the aqueous solution to 65° C., copper sulfate and potassium acetate are used as raw materials, potassium acetate is weighed at 60% of the mass of nano basic copper sulfate, and copper sulfate and potassium acetate are dissolved in the aqueous solution, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 1-3 mol / L, and the stirring speed is 800 r / min; Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing PVPK30 and polyethylene glycol at 12% and 36% of the mass of nano basic copper sulfate, respectively, adding PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min; Step 3: using ammonium carbonate as an alkaline precipitant, weighing ammonium carbonate at 80% of the mass of nano basic copper sulfate, adding the ammonium carbonate to the dispersion in step 2, stirring and mixing evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 6-8; Step 4: heating the mixed solution in step 3 to 70-75°C and reacting for 1.5-2h to obtain a reacted material; Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10-35% is obtained; Step 6: Put the solid-liquid mixture in step 5 into a modification tank, and then put it into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

5. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: Step 1: After heating the aqueous solution to 65° C., copper sulfate and potassium acetate are used as raw materials, potassium acetate is weighed at 60% of the mass of nano basic copper sulfate, and copper sulfate and potassium acetate are dissolved in the aqueous solution, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 1-3 mol / L, and the stirring speed is 800 r / min; Step 2: Using PVPK30 and polyvinyl alcohol as dispersants, weighing PVPK30 and polyvinyl alcohol at 12% and 36% of the mass of nano basic copper sulfate respectively, adding PVPK30 and polyvinyl alcohol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min; Step 3: using ammonium sulfate and sodium hydroxide as alkaline precipitants, weighing sodium hydroxide with a mass of 75% of the nano basic copper sulfate to prepare a sodium hydroxide solution, adding ammonium sulfate to the sodium hydroxide solution to prepare a reaction solution with a concentration ratio of ammonium sulfate to sodium hydroxide of 2:1; adding the reaction solution to the dispersion in step 2, stirring and mixing evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 6-8; Step 4: heating the mixed solution in step 3 to 70-75°C and reacting for 1.5-2h to obtain a reacted material; Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10-35% is obtained; Step 6: Put the solid-liquid mixture in step 5 into a modification tank, and then put it into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

6. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: Step 1: After heating the aqueous solution to 65° C., using copper sulfate and ammonium acetate as raw materials, weighing ammonium acetate at 60% of the mass of nano basic copper sulfate, dissolving copper sulfate and potassium acetate in the aqueous solution, and filtering the dissolved solution for standby use; the concentration of the copper sulfate is 1-3 mol / L, and the stirring speed is 800 r / min; Step 2: Using PVPK30 and sodium lignin sulfonate as dispersants, weighing PVPK30 and sodium lignin sulfonate at 12% and 36% of the mass of nano basic copper sulfate, respectively, adding PVPK30 and sodium lignin sulfonate to the filtrate of step 1 and stirring at a stirring speed of 800 r / min; Step 3: using ammonium carbonate as an alkaline precipitant, weighing ammonium carbonate at 80% of the mass of nano basic copper sulfate; adding the ammonium carbonate to the dispersion in step 2, stirring and mixing evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 6-8; Step 4: heating the mixed solution in step 3 to 70-75°C and reacting for 1.5-2h to obtain a reacted material; Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10-35% is obtained; Step 6: Put the solid-liquid mixture in step 5 into a modification tank, and then put it into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

7. The method for preparing nano basic copper sulfate powder according to claim 2, characterized in that: Step 1: After heating the aqueous solution to 65° C., copper sulfate and sodium acetate are used as raw materials, sodium acetate is weighed at 60% of the mass of nano basic copper sulfate, copper sulfate and potassium acetate are dissolved in the aqueous solution, and the dissolved solution is filtered for standby use; the concentration of the copper sulfate is 1-3 mol / L, and the stirring speed is 800 r / min; Step 2: Using PVPK30 and polyethylene glycol as dispersants, weighing PVPK30 and polyethylene glycol at 12% and 36% of the mass of nano basic copper sulfate, respectively, adding PVPK30 and polyethylene glycol to the filtrate of step 1 and stirring at a stirring speed of 800 r / min; Step 3: ammonium sulfate and ammonia water are used as precipitants, 25% ammonia water is measured, ammonium sulfate is weighed at 105% of the mass of nano basic copper sulfate, and ammonium sulfate is added to the ammonia solution to prepare a reaction solution with a concentration ratio of ammonium sulfate to ammonia water of 2:1, and the reaction solution is added to the dispersion in step 2, and stirred to mix evenly, the stirring speed is 800r / min, the stirring temperature is controlled below 55°C, and the pH value is controlled to be 6-8; Step 4: heating the mixed solution in step 3 to 70-75°C and reacting for 1.5-2h to obtain a reacted material; Step 5: The material after the reaction in step 4 is pumped into a filter press for solid-liquid separation, and a filter cake is obtained after the filter press is filled. The filter press is opened to backwash the filter cake, and the filter cake is taken out after washing with water for 10-15 minutes, and the filter cake is put into a pulping tank for dispersion, pulping and washing to obtain a pulped dispersed material; the pulped dispersed material is pumped into the filter press again for solid-liquid separation to obtain a filter cake, and the filter cake is backwashed for 5-10 minutes, and then the filter cake is put into a pulping tank for dispersion and washing to obtain a pulped dispersed material; the above operation is repeated until a solid-liquid mixture with a solid content of 10-35% is obtained; Step 6: Put the solid-liquid mixture in step 5 into a modification tank, and then put it into a spray drying system for low-temperature drying to obtain the nano basic copper sulfate powder after drying.

8. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: The mass fraction of the copper sulfate is 5-25%.

9. The method for preparing nano basic copper sulfate powder according to claim 2, wherein: The mass fraction of the pickling agent is 1-10%.

10. The method for preparing nano basic copper sulfate powder according to claim 2, characterized in that: The mass fraction of the dispersant is 1-10%; the volume fraction of the alkaline precipitant is 1-20%.

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