CN115703647A - Method for continuously producing basic copper carbonate by using acidic etching waste liquid - Google Patents
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Abstract
The invention discloses a method for continuously producing basic copper carbonate by using acidic etching waste liquid, which takes the acidic etching liquid containing copper and alkali liquor as raw materials and comprises the following steps: (1) Mixing Cu + Oxidation to Cu 2+ (ii) a (2) Mixing alkaline solution with Cu 2+ The acidic etching solution is synchronously dripped into the reactor in a stirring state through the first dripping control valve and the second dripping control valve respectively, the pH value of a reaction end point is monitored through a pH online monitor, basic copper carbonate crystals generated by the reaction are continuously discharged from a discharge port in the middle of the bottom of the reactor, and continuous production is realized. The method can correspondingly adjust the dropping amount of the alkali liquor according to the actually measured pH value of the mixed liquor, and can improve the purity of the generated basic copper carbonate in response to the fluctuation of a reaction result caused by the instability of the acidity value of the acidic etching solution; the dripping technology of a laboratory is industrialized, and the large-scale production modes of continuous dripping, continuous reaction and continuous discharging are realized.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of hazardous wastes, in particular to a method for continuously producing basic copper carbonate by using acidic etching waste liquid.
Background
With the rapid development of global intellectualization and informatization, the demand of circuit boards (chips) is greatly increased. In the manufacturing process of circuit boards (chips), the acid etching waste liquid is an indispensable hazardous waste product, and the category of the acid etching waste liquid in the hazardous waste list is HW22 (eight codes 398-004-22 or 398-005-22). China has a huge circuit board manufacturing industry, the generation amount of hazardous wastes (acid etching waste liquid) is increased year by year, a technology for disposing and utilizing the hazardous wastes is an important means for protecting the environment, a technology for developing, innovating and comprehensively utilizing the hazardous wastes can protect the environment and support the continuous green development of the circuit board (chip) industry, the wastes can be changed into valuable things, and the circular economy can be developed.
With the development of science and technology, the technology for recycling the acidic etching waste liquid by disposing hazardous wastes in China has been developed from the traditional preparation of copper oxide mud and copper hydroxide mud with low added values to the production of chemical copper products with high added values, such as cuprous chloride and cupric oxychloride. Chinese patent ZL2005100390770 discloses a method for producing cuprous chloride from waste copper oxychloride etching solution, which comprises the steps of firstly putting a certain amount of acidic etching waste solution into a reaction barrel, then slowly putting sodium sulfite into the reaction barrel to ensure that the acidic etching waste solution in the reaction barrel and the sodium sulfite are subjected to reduction reaction, and when Cu in the acidic etching waste solution in the reaction barrel is in reaction, adding copper chloride into the reaction barrel 2+ Complete reduction to Cu + The sodium sulfite is stopped to be added, and cuprous chloride products are generated. The method utilizes Cu as resource + And C l - However, cu + The utilization rate of (1) is only 80%, and Cu exists + Risk of secondary pollution. Chinese patent ZL200610041265.1 discloses a method for producing copper oxychloride by using circuit board etching waste liquid, which is characterized in that acid etching waste liquid and alkaline etching waste liquid produced by circuit board are simultaneously dripped into a reaction barrel for synthetic reaction to generate copper oxychloride products, the defects are that waste water containing ammonia pollution is generated at the same time, the later stage water treatment process is complex and difficult, and the risk of N secondary pollution exists at the same time. Namely, the existing methods can not realize the complete recycling of copper ions in the acidic etching solution, and still have the risks of secondary pollution and copper ion resource waste.
The basic copper carbonate is a crystalline green powder of copper oxide, is also a chemical copper product with high added value, can be used for manufacturing signal bullets, fireworks, paint pigments, other copper salts, solid fluorescent powder activators, insecticides and seed treatment, can be used as a bactericide and a detoxifying agent, and is also used for the electroplating industry, the preparation of high-grade copper sulfate and the like. Chinese patent CN 206751418U discloses a basic copper carbonate production system, which in the embodiment describes that in the actual operation process, the acidic etching waste liquid is oxidized by hydrogen peroxide, then the acidic etching waste liquid and alkali liquor are added into a neutralization device to be neutralized and crystallized with ammonia nitrogen tail water containing chloride ions, the basic copper carbonate can be prepared after filtration and drying, the recovery rate of copper reaches 99.9%, the resource recycling is realized, and the environmental protection effect is good.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
1. neutralizing and crystallizing determined amounts of acidic waste etching solution and alkaline solution in equipment (such as a neutralization kettle), and then completely transferring to filter and dry, wherein the reaction process is carried out discontinuously, continuous production cannot be realized, and the production efficiency is low;
2. because the concentration of the waste is randomly changed (natural law), namely the acidity of the acidic etching waste liquid is randomly changed irregularly, the end point of the reaction process cannot be accurately controlled by adding the acidic etching waste liquid and the alkali liquid respectively according to determined flow, and the prepared basic copper carbonate product has low purity.
Disclosure of Invention
The invention mainly solves the technical problem of providing a method for continuously producing basic copper carbonate by using acidic etching waste liquid, which can solve the problems of incapability of continuous production, low efficiency and low purity of basic copper carbonate in the background technology.
In order to solve the technical problems, the invention adopts a technical scheme that: the method for continuously producing the basic copper carbonate by using the acidic etching waste liquid is provided, takes the acidic etching liquid containing copper and alkali liquor as raw materials, and comprises the following steps:
(1) Oxidizing the acid etching solution: adding oxidant or aerating air to acidic etching liquid to make Cu in acidic etching liquid + Conversion to Cu 2+ Then filtering and removing impurities;
(2) Mixing and reacting: synchronously dripping alkali liquor and the acid etching solution filtered and purified in the step (1) into a reactor in a stirring state through an alkali liquor pipeline with a first dripping control valve and an acid liquor pipeline with a second dripping control valve respectively for reaction, monitoring the pH value at the end point of the reaction through an online pH monitor, and continuously discharging basic copper carbonate crystals generated by the reaction from a discharge port in the middle of the bottom of the reactor during the rotating process to realize continuous production;
wherein, the pH on-line monitor and the first dripping control valve are respectively connected with the program controller.
Preferably, the method for monitoring the reaction end point pH value by the pH on-line monitor comprises the following steps: the pH on-line monitor detects the pH value of the mixed solution in the reactor in real time and feeds the pH value back to the program controller, the program controller compares the received pH value with a set value, and if the pH value is lower than the midpoint value of the set pH value, the opening degree of the first addition valve is increased; if the pH value is higher than the midpoint value of the set pH value, the opening degree of the first addition valve is reduced; the end point pH value is 6.8-7.8.
Preferably, a top cover of the reactor is provided with a first feed port, a second feed port and a pH online monitor mounting port, wherein the first feed port is communicated with the alkali liquor pipeline; the second feed port is communicated with the acid liquor pipeline, and the first feed port and the second feed port are distributed on the central line of the top cover, are close to the edge of the top cover and are positioned on the side of the starting end in the rotating and mixing direction; the pH on-line monitor mounting port is located on one side of the first feed port and the second feed port and located on the tail end side in the rotating mixing direction.
The invention at least has the following technical effects:
through the design that a first dripping control valve, a second dripping control valve, a program controller and a pH on-line monitor are respectively arranged on an alkali liquor pipeline and an acid liquor pipeline and the connection design that the program controller is connected with the first dripping control valve and the pH on-line monitor, on one hand, the alkali liquor and the acidic etching solution are simultaneously dripped for reaction, the reaction process can be accurately controlled, the high precision of acid-base reaction is ensured, on the other hand, the opening degree of an alkali liquor dripping adjusting valve is regulated and controlled in real time through the process controller according to the pH value monitored by the pH on-line monitor, the alkalinity input of the alkali liquor is ensured to be just in time neutralized with the acidity of the acidic etching solution of hazardous wastes, the pH value is stabilized in the range of 6.8-7.8, and therefore, the problems that the reaction end point is unstable and the purity of basic copper carbonate is low due to the acidity change of the hazardous wastes (the acidic etching solution) are solved, and the reaction rate in a reactor is more than 99%.
Drawings
FIG. 1 is a schematic process flow diagram of the continuous production method of basic copper carbonate by using acidic waste etching solution according to the present invention;
FIG. 2 is a schematic view showing the connection of the apparatus used to complete the process of FIG. 1;
the parts in the drawings are numbered as follows: 1. the device comprises an alkali liquor pipeline, 11 parts of a first dripping control valve, 2 parts of an acid liquor pipeline for conveying acid etching liquor, 21 parts of a second dripping control valve, 3 parts of a reactor, 31 parts of a first feeding hole, 32 parts of a second feeding hole, 33 parts of a pH online detector mounting hole, 34 parts of a discharging hole, 4 parts of a centrifuge, 5 parts of a dryer, 6 parts of a pH online detector and 7 parts of a program controller.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1 and 2, an embodiment of the present invention includes:
example 1
A method for continuously producing basic cupric carbonate by utilizing acidic etching waste liquid takes the acidic etching liquid containing copper and alkali liquor as raw materials, wherein the alkali liquor is sodium carbonate solution, and the preparation method comprises the following steps: mixing the soda powder and deionized water according to the mass ratio of 1.
The method is completed in a production line comprising:
an alkali liquor pipeline 1 for conveying sodium carbonate solution, an acid liquor pipeline 2 for conveying acid etching solution, a reactor 3, a centrifuge 4 and a dryer 5; the reactor comprises an alkali liquor pipeline 1, an acid liquor pipeline 2, a reactor top cover 3 and a reactor bottom cover, wherein the alkali liquor pipeline 1 is provided with a first dripping control valve 11, the acid liquor pipeline 2 is provided with a second dripping control valve 21, and the reactor top cover is provided with a first feeding hole 31, a second feeding hole 32, a pH online monitor mounting hole 33 and a discharging hole 34; the first feed port 31 and the second feed port 32 are distributed on the central line of the top cover of the reactor 3, are close to the edge of the top cover, and are positioned at the initial end side of the rotating mixing direction of the stirrer in the reactor 3; the pH on-line monitoring appearance installing port 33 is located one side of first feed inlet 31 and second feed inlet 32, and is located the terminal side of rotatory direction of mixing, pH on-line monitoring appearance installing port 33 department installs pH on-line monitoring appearance 6 for the pH value of the mixed liquid of reaction in the real-time supervision regulation and control reactor, its mounted position is set for and is ensured that the pH value that detects is the reaction terminal point pH value of the mixed liquid of reaction.
The distance between the first feed opening 31 and the second feed opening 32 is 100-200 mm. The design of the position and the distance between the first feed port 31 and the second feed port 32 ensures that the alkali solution and the acidic etching solution are rotationally mixed in the reactor by different stirring circumferential lines (rotation tracks) on one hand, and ensures that the rotation tracks of the two reaction solutions can slowly converge and generate a middle circumferential line (track) in the process of rotational mixing, namely a reactant circumferential line, and ensures that the two reaction solutions completely converge after rotating at 360 ℃ to complete neutralization reaction and generate basic copper carbonate on the other hand. The generated basic copper carbonate has large crystallization particles, small crystal surface area and good product quality in the rotation process, and is convenient for later-stage slurry separation and crystal surface washing.
The production line also comprises a program controller 7 such as a PLC (programmable logic controller), wherein the program controller is in signal connection with the pH online detector and is used for receiving the pH value transmitted by the pH online detector, comparing the pH value with a reaction end point pH value preset in the program controller, regulating and controlling the opening degree of a first dripping control valve 11 according to a comparison result, and the first dripping control valve is connected with the program controller so as to regulate and control the dripping amount of the alkali liquor, so as to deal with the fluctuation of a reaction result caused by the instability of the acidity value of the acidic etching solution and improve the purity of the generated basic copper carbonate.
The feed inlet of the centrifuge 4 is connected with the discharge outlet 34 of the reactor 3, the specific gravity of the basic copper carbonate generated after reaction is larger than that of acid liquor and alkali liquor, in the rotating process, the basic copper carbonate crystal particles become larger, and sink towards the bottom of the reactor 3 under the action of self gravity, and finally continuously enter the centrifuge 4 through the discharge outlet 34 to realize continuous production, and the basic copper carbonate after centrifugal separation, washing and drying finally enters the dryer 6 to be dried, so that the finished basic copper carbonate is obtained.
The specific process of the method is as follows:
(1) Oxidizing the acid etching solution: adding excessive hydrogen peroxide with the mass concentration of 50% into the acidic etching solution to ensure that Cu in the acidic etching solution + All conversion to Cu 2+ Then filtering to remove impurities to obtain the product containing Cu 2+ The acidic etching solution of (4);
(2) Mixing and reacting: respectively adjusting the valve opening degrees of the first dropwise adding control valve 11 and the second dropwise adding control valve 21 to 50%, starting a stirrer of the reactor 3, inputting the prepared sodium carbonate solution into the alkali liquor pipeline 1, and dropwise adding the sodium carbonate solution into the reactor 3 through the first feeding hole 31 under the control of the first dropwise adding control valve 11; and (2) synchronously dropwise adding the acidic etching solution subjected to impurity removal in the step (1) into the reactor 3 through a second feed port 32 through an acid solution pipeline 2 under the control of a second dropwise adding control valve 21, wherein the dropwise added sodium carbonate solution and the acidic etching solution rotate (operate) in the reactor along the circumferential lines where the first feed port 31 and the second feed port 32 are located respectively, then the operation circumferential lines (tracks) of the two reaction solutions are slowly converged in the rotating process to form a third circumferential line to generate basic copper carbonate, and the two reaction solutions are completely converged to complete a neutralization reaction through 360-degree rotation along with the continuous stirring to generate the basic copper carbonate slurry. In the rotating reaction process, the pH value of the reaction liquid is detected in real time by the pH on-line detector, and the opening degree of the first dropping control valve 11 is regulated and controlled by the program controller 7 through a feedback signal according to the change of the pH value, so that the dropping amount of the alkali liquor is regulated and controlled, the influence of the change of the acidity value of the acidic etching solution is responded, and the pH value is maintained in the range of 7.5-7.8. The specific regulating method is that the range of the pH value and the midpoint value thereof are preset in the program controller, if the measured pH value is transmitted to the program controller and is lower than the midpoint value of the set pH value through comparison, the opening degree of the first adding valve 11 is proportionally increased; if the measured pH value is transmitted into the program controller, the opening degree of the first dropping valve is proportionally reduced after the contrast ratio is higher than the midpoint value of the set pH value, so that the two solutions rotate on the liquid level for 360 degrees along with stirring to realize complete confluence, and in the process, the pH value of the reaction end point is constant within the range of 7.5-7.8, so that the opening degree of the first dropping valve on the sodium carbonate solution pipe can be fed back and regulated by the measured pH value information under the action of the pH on-line monitor, so that the whole reaction process in the reactor is accurately controlled, and the reaction product is stabilized within the product quality standard range, even if the concentration of the hazardous waste (acidic etching waste liquid) is changed or the concentration of the sodium carbonate solution is changed due to preparation errors.
(3) Separation and drying: the crystal grain size of the basic copper carbonate generated by the reaction is increased in the rotating process, and the specific gravity of the basic copper carbonate is larger than that of the alkaline solution and the acidic etching solution, so that the basic copper carbonate generated in the rotating process sinks towards the bottom of the reactor and is finally discharged from a discharge hole of the reactor, the discharged basic copper carbonate firstly enters a centrifugal machine for centrifugal dehydration, then enters a dryer after being washed, and is dried at 50-70 ℃ to obtain the finished basic copper carbonate and is packaged, and the drying temperature of 50-70 ℃ can effectively prevent the basic copper carbonate from being oxidized at high temperature.
In the process, the dropwise addition reaction of the two reaction liquids at the upper part of the reactor 3 and the sedimentation separation of the basic copper carbonate at the bottom part are carried out simultaneously, so that the continuous dropwise addition, the continuous reaction, the continuous discharging and the continuous drying and packaging are realized, the large-scale industrial production of a laboratory dropwise addition technology is realized, and the product purity and the production rate of the basic copper carbonate are effectively improved.
The utilization rate of copper ions in the acidic etching waste liquid in the implementation process reaches 99.99%, the whole reaction process is accurately controlled through the configuration of intelligent instrument equipment, and a large-scale production line with continuous dropwise addition, continuous reaction, continuous discharging, continuous drying and packaging is realized.
The basic copper carbonate produced by the steps of the method is mainly used for producing wood preservatives, petroleum catalysts and waste gas treatment carrier products, and is a fine chemical product with high added value. At present, the basic copper carbonate produced by comprehensively utilizing waste resources occupies 60 percent of the global market, wherein the basic copper carbonate product produced by the technology of the invention occupies 40 percent of the global market.
The invention uses the principle of circumferential centripetal force, specific gravity difference of materials before and after reaction and large specific gravity of reaction products through the connection design of a pH on-line detector, a program controller and a dripping control valve and the design of the position of a feeding port, is only applied to a laboratory for testing, is convenient for accurately controlling the slow feeding mode of the reaction process, is dropwise added, is successfully applied to the continuous industrial production of the basic copper carbonate, ensures that the reacted slurry at the lower half part of a reaction barrel is continuously taken out, and realizes the large-scale production modes of continuous dropwise addition, continuous reaction and continuous discharging. The invention is really characterized by industrialization of experimental technology, and the technology can be widely applied to various production processes of neutralization reaction and two solutions to synthesize products.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. A method for continuously producing basic copper carbonate by using acidic etching waste liquid is characterized in that the method takes the acidic etching liquid containing copper and alkali liquid as raw materials and comprises the following steps:
(1) Oxidizing the acid etching solution: adding oxidant or aerating oxygen to acidic etching liquid to make Cu in acidic etching liquid + Conversion to Cu 2+ Then filtering and removing impurities;
(2) Mixing and reacting: synchronously dripping alkali liquor and the acid etching solution filtered and purified in the step (1) into a reactor in a stirring state through an alkali liquor pipeline with a first dripping control valve and an acid liquor pipeline with a second dripping control valve respectively for reaction, monitoring the pH value at the end point of the reaction through an online pH monitor, and continuously discharging basic copper carbonate crystals generated by the reaction from a discharge port in the middle of the bottom of the reactor during the rotating process to realize continuous production;
wherein, the pH on-line monitor and the first dripping control valve are respectively connected with the program controller.
2. The method for continuously producing basic copper carbonate by using the acidic etching waste liquid according to claim 1, wherein the initial opening degree of the first dropping valve and the initial opening degree of the second dropping valve are the same.
3. The method for continuously producing basic copper carbonate by using acidic waste etching solution according to claim 1, wherein the method for monitoring the pH value of the reaction endpoint by using the pH online monitor comprises the following steps: the pH on-line monitor detects the pH value of the mixed solution in the reactor in real time and feeds the pH value back to the program controller, the program controller compares the received pH value with a set value, and if the pH value is lower than the midpoint value of the set pH value, the opening degree of the first addition valve is increased; and if the pH value is higher than the midpoint value of the set pH value, the opening degree of the first addition valve is reduced.
4. The method for continuously producing basic copper carbonate by using the acidic etching waste liquid according to claim 1, wherein a top cover of the reactor is provided with a first feed port, a second feed port and a pH on-line monitor mounting port, wherein the first feed port is communicated with the alkali liquid pipeline; the second feed port is communicated with the acid liquor pipeline, and the first feed port and the second feed port are distributed on the central line of the top cover, are close to the edge of the top cover and are positioned on the initial end side in the rotating mixing direction; the pH on-line monitor mounting port is positioned on one side of the first feeding port and the second feeding port and positioned on the tail end side in the rotating and mixing direction.
5. The method for continuously producing basic copper carbonate by using acidic waste etching solution according to claim 4, wherein the distance between the first feeding hole and the second feeding hole is 100-200 mm.
6. The method for continuously producing basic copper carbonate according to claim 1, wherein the end point pH value is 6.8-7.8.
7. The method for continuously producing basic copper carbonate by using acidic waste etching solution according to claim 1, wherein the alkali solution is sodium carbonate solution, and the mass concentration of the alkali solution is 9-17%.
8. The method for continuously producing basic copper carbonate by using acidic waste etching solution according to claim 1, further comprising the steps of centrifugal filtration, washing, dehydration and drying.
9. The method for continuously producing basic copper carbonate by using acidic waste etching solution according to claim 8, wherein the drying temperature is 50-70 ℃.
10. The method for continuously producing basic copper carbonate by using the acidic etching waste liquid as claimed in claim 1, wherein the oxidant is chlorate, perchlorate or hydrogen peroxide.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501459A (en) * | 1974-02-25 | 1978-02-15 | Du Pont | Production of basic copper carbonate |
| CN104986796A (en) * | 2015-06-09 | 2015-10-21 | 张家港合志纳米科技有限公司 | Device system and preparation technology for preparing submicron material through continuous hydrothermal method |
| CN205634920U (en) * | 2016-05-27 | 2016-10-12 | 上海绿澄环保科技有限公司 | Utilize device of acid etching solution and alkaline etching liquid preparation oxo -chlorination copper |
| CN211329370U (en) * | 2019-11-22 | 2020-08-25 | 焦作市维纳科技有限公司 | Reaction device for producing nano zirconia powder through pyrohydrolysis |
| CN111717930A (en) * | 2020-06-30 | 2020-09-29 | 广东资环境成科技有限公司 | Method for producing basic copper carbonate based on copper-containing etching waste liquid |
| CN112569883A (en) * | 2020-11-04 | 2021-03-30 | 阮氏化工（常熟）有限公司 | Online adjusting and controlling system and method for acid liquid and alkali liquid mixed pH value |
| CN112624177A (en) * | 2020-12-04 | 2021-04-09 | 阮氏化工（常熟）有限公司 | Energy-saving and environment-friendly combined circulating production line and production method |
-
2021
- 2021-08-06 CN CN202110902566.3A patent/CN115703647A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1501459A (en) * | 1974-02-25 | 1978-02-15 | Du Pont | Production of basic copper carbonate |
| CN104986796A (en) * | 2015-06-09 | 2015-10-21 | 张家港合志纳米科技有限公司 | Device system and preparation technology for preparing submicron material through continuous hydrothermal method |
| CN205634920U (en) * | 2016-05-27 | 2016-10-12 | 上海绿澄环保科技有限公司 | Utilize device of acid etching solution and alkaline etching liquid preparation oxo -chlorination copper |
| CN211329370U (en) * | 2019-11-22 | 2020-08-25 | 焦作市维纳科技有限公司 | Reaction device for producing nano zirconia powder through pyrohydrolysis |
| CN111717930A (en) * | 2020-06-30 | 2020-09-29 | 广东资环境成科技有限公司 | Method for producing basic copper carbonate based on copper-containing etching waste liquid |
| CN112569883A (en) * | 2020-11-04 | 2021-03-30 | 阮氏化工（常熟）有限公司 | Online adjusting and controlling system and method for acid liquid and alkali liquid mixed pH value |
| CN112624177A (en) * | 2020-12-04 | 2021-04-09 | 阮氏化工（常熟）有限公司 | Energy-saving and environment-friendly combined circulating production line and production method |
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