CN112899687A - Acidic etching solution recycling oxidant - Google Patents
Acidic etching solution recycling oxidant Download PDFInfo
- Publication number
- CN112899687A CN112899687A CN201911218469.1A CN201911218469A CN112899687A CN 112899687 A CN112899687 A CN 112899687A CN 201911218469 A CN201911218469 A CN 201911218469A CN 112899687 A CN112899687 A CN 112899687A
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- CN
- China
- Prior art keywords
- industrial
- oxidant
- chloride
- etching solution
- recycling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/46—Regeneration of etching compositions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/18—Acidic compositions for etching copper or alloys thereof
Abstract
The invention provides an oxidant for recycling an acidic etching solution, which is prepared from the following raw materials in percentage by mass: technical grade 98% sodium chlorate: industrial grade sodium chloride: industrial grade ammonium chloride: industrial grade potassium chloride: 250 parts of water: 120: 50: 10: 900, the invention enables the regeneration liquid to meet the redox reaction in the recycling process by adding a small amount of oxidant, improves the recycling rate of the regeneration liquid, improves the etching rate, reduces the production cost, and realizes the resource protection, environmental protection and energy conservation.
Description
Technical Field
The invention relates to the technical field of acidic etching solution recycling, in particular to an oxidant for recycling acidic etching solution.
Background
Printed Circuit Boards (PCBs) are important components of electronic products, and nowadays, along with the rapid production of PCBs, a large amount of circuit board etching waste liquid is also generated, and in order to achieve resource protection, environmental protection, energy saving and cost reduction, the etching waste liquid is usually treated to become a recycled regeneration liquid, and the treated regeneration liquid cannot meet the reduction reaction of oxidation in the recycling process because the treated regeneration liquid is used once, so that the etching rate and the recycling rate of the regeneration liquid are reduced.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a component of an oxidant for recycling acidic etching solution, which can meet the redox reaction of the regenerated solution in the recycling process by adding the oxidant, and solves the problems of high production cost, incapability of realizing resource protection, environmental protection and energy conservation, reduction of etching rate and reduction of the recycling rate of the regenerated solution.
In order to solve the technical problems, the invention adopts the following technical scheme:
an oxidizing agent for recycling acidic etching solution is prepared from the following raw materials in percentage by mass: technical grade 98% sodium chlorate: industrial grade sodium chloride: industrial grade ammonium chloride: industrial grade potassium chloride: 250 parts of water: 120: 50: 10: 900.
preferably, the blending process of the acidic etching solution recycling oxidant is as follows:
1) 900 liters of tap water is added into a stirring barrel which is provided with a stirrer and has the volume of about 2000 liters;
2) sequentially adding 250 kg of 98% industrial sodium chlorate solid, 120 kg of industrial sodium chloride and 10 kg of industrial potassium chloride into a stirring barrel;
3) after the medicines are added, starting a stirrer for 30 minutes, and adding 50 kg of industrial ammonium chloride solid after the solid is dissolved;
4) adding ammonium chloride, and stirring until the ammonium chloride solid or other medicines are completely dissolved to obtain the final product.
The invention has the beneficial effects that: by adding the oxidant, the regeneration liquid can meet the redox reaction in the recycling process, the recycling rate of the regeneration liquid is improved, the etching rate is improved, the production cost is reduced, and the resource protection, environmental protection and energy conservation are realized.
The following is combined with the main components of the invention to further explain the beneficial effects:
the sodium chlorate mainly has the function of oxidizing monovalent copper ions generated by the reaction of the divalent copper ions in the etching solution and metal copper into divalent copper ions, so that the etching solution continuously has etching capacity (the reaction formula is as follows:
Cu+CuCl2＝Cu2Cl2；3Cu2Cl2+NaClO3+6HCl＝6CuCL2+NaCl+3H2O
industrial sodium chloride mainly functions to provide chloride ions, so that generated cuprous chloride is complexed with the chloride ions, and cuprous chloride is prevented from precipitating (the reaction formula is as follows:
the reaction formula is Cu2Cl2+4Cl-＝2[CuCl3]2-
The industrial potassium chloride mainly acts to improve the solubility of copper chloride in the solution, promote the improvement of the flow property of the etching solution and improve the copper dissolving amount of the etching solution;
the industrial ammonium chloride mainly acts to increase the etching copper rate, and provides chloride ions to improve the complexing capacity of cuprous chloride.
Detailed Description
All the raw materials used in the present application meet the international industrial raw material standard, so that the source of a single raw material is not indicated in the present application, the present embodiment is only an explanation of the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications to the present embodiment as needed without inventive contribution after reading the present specification, but all the modifications are protected by patent laws within the scope of the claims of the present invention.
The component of the oxidant for recycling the acidic etching solution is prepared from the following raw materials in percentage by mass: technical grade 98% sodium chlorate: industrial grade sodium chloride: industrial grade ammonium chloride: industrial grade potassium chloride: 250 parts of water: 120: 50: 10: 900.
further, the blending process of the acid etching solution recycling oxidant is as follows:
1) 900 liters of tap water is added into a stirring barrel which is provided with a stirrer and has the volume of about 2000 liters;
2) sequentially adding 250 kg of 98% industrial sodium chlorate solid, 120 kg of industrial sodium chloride and 10 kg of industrial potassium chloride into a stirring barrel;
3) after the medicines are added, starting a stirrer for 30 minutes, and adding 50 kg of industrial ammonium chloride solid after the solid is dissolved;
4) adding ammonium chloride, and stirring until the ammonium chloride solid or other medicines are completely dissolved to obtain the final product.
The influence of the oxidant on the etching rate, and the comparative experimental data are as follows:
the invention is added when the oxidation-reduction potential of the regeneration liquid is low or the etching liquid needs to be added with an electrolytic additive, is beneficial to normal oxidation-reduction reaction of the regeneration liquid in the recycling process, improves the recycling rate of the regeneration liquid, improves the etching rate, reduces the production cost, has small trend of etching rate change and stable etching rate, is suitable for being applied to the etching liquid recycling process, and is beneficial to realizing the resource protection and environmental protection and energy conservation.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (2)
1. The oxidant for recycling the acidic etching solution is characterized by being prepared from the following raw materials in percentage by mass: technical grade 98% sodium chlorate: industrial grade sodium chloride: industrial grade ammonium chloride: industrial grade potassium chloride: 250 parts of water: 120: 50: 10: 900.
2. the method of claim 1, wherein the acidic etching solution is recycled and reused by using an oxidant, and the oxidant is prepared by the following steps:
1) 900 liters of tap water is added into a stirring barrel which is provided with a stirrer and has the volume of about 2000 liters;
2) sequentially adding 250 kg of 98% industrial sodium chlorate solid, 120 kg of industrial sodium chloride and 10 kg of industrial potassium chloride into a stirring barrel;
3) after the medicines are added, starting a stirrer for 30 minutes, and adding 50 kg of industrial ammonium chloride solid after the solid is dissolved;
4) adding ammonium chloride, and stirring until the ammonium chloride solid or other medicines are completely dissolved to obtain the final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911218469.1A CN112899687A (en) | 2019-12-03 | 2019-12-03 | Acidic etching solution recycling oxidant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911218469.1A CN112899687A (en) | 2019-12-03 | 2019-12-03 | Acidic etching solution recycling oxidant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112899687A true CN112899687A (en) | 2021-06-04 |
Family
ID=76103777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911218469.1A Pending CN112899687A (en) | 2019-12-03 | 2019-12-03 | Acidic etching solution recycling oxidant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112899687A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760199A (en) * | 2009-11-09 | 2010-06-30 | 广东奥美特集团有限公司 | Two-liquid acid etching liquid oxidant |
| CN102634801A (en) * | 2012-04-27 | 2012-08-15 | 东莞市广华化工有限公司 | Low-acidity acidic etching regenerant and acidic etching mother liquor thereof |
| CN104073804A (en) * | 2014-06-17 | 2014-10-01 | 长沙牧泰莱电路技术有限公司 | PCB (Polychlorinated Biphenyl) acidic etching solution |
| CN104278272A (en) * | 2014-04-30 | 2015-01-14 | 天津普林电路股份有限公司 | Acidic etching solution recycled in high-density interconnection circuit board and preparation method of acidic etching solution |
| US20170058408A1 (en) * | 2015-08-31 | 2017-03-02 | Yiting YE | Method for electrolytic recycling and regenerating acidic cupric chloride etchants |
-
2019
- 2019-12-03 CN CN201911218469.1A patent/CN112899687A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760199A (en) * | 2009-11-09 | 2010-06-30 | 广东奥美特集团有限公司 | Two-liquid acid etching liquid oxidant |
| CN102634801A (en) * | 2012-04-27 | 2012-08-15 | 东莞市广华化工有限公司 | Low-acidity acidic etching regenerant and acidic etching mother liquor thereof |
| CN104278272A (en) * | 2014-04-30 | 2015-01-14 | 天津普林电路股份有限公司 | Acidic etching solution recycled in high-density interconnection circuit board and preparation method of acidic etching solution |
| CN104073804A (en) * | 2014-06-17 | 2014-10-01 | 长沙牧泰莱电路技术有限公司 | PCB (Polychlorinated Biphenyl) acidic etching solution |
| US20170058408A1 (en) * | 2015-08-31 | 2017-03-02 | Yiting YE | Method for electrolytic recycling and regenerating acidic cupric chloride etchants |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210604 |
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| RJ01 | Rejection of invention patent application after publication |