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PCB methanesulfonic acid tin stripping waste liquid cyclic regeneration method and application thereof

A technology of waste liquid recycling and methanesulfonic acid, which is applied in photography technology, instruments, photography auxiliary technology and other directions, can solve problems that have not been studied before, and achieve the effect of saving material costs

Active Publication Date: 2022-03-25
广东鑫菱环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In the face of the above problems, the prior art has never studied related topics

Method used

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  • PCB methanesulfonic acid tin stripping waste liquid cyclic regeneration method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Each composition of the tin methanesulfonate stripping liquid of embodiment one is as follows:

[0037] component name methanesulfonic acid Stannous methanesulfonate nitric acid EDTA-2Na Benzotriazole magnesium sulfate percentage content 15% 2% 1.5% 0.5% 0.5% 0%

[0038] Correspondingly, the preparation method of tin stripping solution is as follows:

[0039] 1.1 According to the components and contents of the above tin stripping solution, sequentially weigh methanesulfonic acid and stannous methanesulfonate and add them to the measured pure water, stir and dissolve with a glass rod to obtain a mixed solution;

[0040] 1.2 The solution obtained by the above mixture is stirred, and the weighed nitric acid, magnesium sulfate, EDTA-2Na and benzotriazole are added in sequence according to the above concentrations. After completely mixing and dissolving, add water to the mark, and then stir to obtain methyl Sulfonic acid tin stripping so...

Embodiment 2

[0042] The components of the tin methanesulfonate stripping solution of embodiment two are as follows:

[0043] component name methanesulfonic acid Stannous methanesulfonate nitric acid EDTA-2Na Benzotriazole magnesium sulfate percentage content 15% 5% 0% 1% 1% 2%

[0044] Correspondingly, the preparation method of tin stripping solution is as follows:

[0045] 2.1 According to the components and contents of the above tin stripping solution, sequentially weigh methanesulfonic acid and stannous methanesulfonate and add them to the measured pure water, stir and dissolve with a glass rod to obtain a mixed solution;

[0046] 2.2 The solution obtained from the above mixture is stirred, and the weighed nitric acid, magnesium sulfate, EDTA-2Na and benzotriazole are added in sequence according to the above concentrations. After completely mixing and dissolving, add water to the mark, and then stir to obtain methyl Sulfonic acid tin stripping solut...

Embodiment 3

[0048] The components of the tin methanesulfonate stripping solution of embodiment three are as follows:

[0049] component name methanesulfonic acid Stannous methanesulfonate sulfuric acid EDTA-2Na Tolylbenzotriazole magnesium sulfate ammonium sulfate percentage content 20% 0.5% 1.5% 2% 0.5% 1% 1%

[0050] The corresponding preparation method of tin stripping solution is as follows:

[0051] 3.1 According to the components and contents of the above tin stripping solution, sequentially weigh methanesulfonic acid and stannous methanesulfonate and add them to the measured pure water, stir and dissolve with a glass rod to obtain a mixed solution;

[0052] 3.2 The solution obtained by the above mixture is stirred, and the weighed sulfuric acid, magnesium sulfate, ammonium sulfate, EDTA-2Na and benzotriazole are added in sequence according to the above concentrations, and after complete mixing and dissolution, add water to the scale, and then...

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Abstract

The invention relates to a PCB methanesulfonic acid tin stripping waste liquid cyclic regeneration method and application thereof. The invention belongs to the technical field of energy conservation and environmental protection. The method is technically characterized in that after tin ions in the tin stripping waste liquid are electrolyzed to recycle metallic tin, generated electric residual liquid (tin stripping regeneration liquid) is returned to a production line for use after component adjustment, and under the condition that the temperature of the tin stripping liquid is 32 DEG C, the tin stripping rate is 2.1-2.33 um / min. By the adoption of the method, the material cost is saved, meanwhile, components of the tin stripping water are not increased, and greater value is created for PCB enterprises.

Description

technical field [0001] The patent of the invention relates to the field of energy saving and environmental protection, in particular to a recycling method and application of PCB methanesulfonic acid tin stripping waste liquid. Background technique [0002] In the printed circuit board (PCB) production process, the production of PCB needs to be plated with a layer of tin as a resist layer on the graphic surface, and then the tin in the resist layer is dissolved after etching. [0003] At present, the nitric acid type tin stripping solution is generally used to etch the resist layer, which generally contains nitric acid as the main component, and there are also agents such as nitric acid stabilizers, copper corrosion inhibitors, and ferric nitrate. During the tin stripping process, when the tin content of the solution gradually increases, when it reaches a certain concentration, the tin stripping ability decreases, and it is discharged from the tin stripping equipment to becom...

Claims

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Application Information

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IPC IPC(8): C25C1/14C23F1/46C23F1/30
CPCC25C1/14C23F1/46C23F1/30Y02P10/20C23F1/44
Inventor 罗欢
Owner 广东鑫菱环境科技有限公司
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