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Browning waste liquid treatment method

A waste liquid treatment and browning technology, which is applied in chemical instruments and methods, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of high energy consumption, low copper ion removal rate, and difficult electrolysis, etc., to achieve The treatment process is simple, the treatment effect is remarkable, and the effect of improving the removal rate

Active Publication Date: 2019-10-01
深圳市浩天源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, for example, a browning liquid COD treatment process disclosed in Chinese patent CN109179803A, a browning waste liquid treatment process disclosed in CN105502760A, and a browning liquid treatment method disclosed in CN102603102B, although electrolysis can be used to Remove the copper ions in the browning waste liquid, but because the concentration of copper ions in the browning waste liquid produced in the PCB board production process is high, if it is directly used for electrolysis of copper, it is not easy to electrolyze, and there is still high energy consumption and low removal rate of copper ions

Method used

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  • Browning waste liquid treatment method

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Embodiment 1

[0027] This embodiment provides a kind of browning waste liquid treatment method, and it comprises the following steps:

[0028] (1) Add mass concentration to 1000ml browning waste liquid and be 40% sodium hydroxide, until the pH value of browning waste liquid is stable at 7.0, and stir 60min according to the stirring speed of 120rpm, let browning waste liquid Silane is fully hydrolyzed, and can fully react and neutralize various inorganic acids and organic acids; the specific chemical reaction process is as follows:

[0029] h 2 SO 4 +2NaOH→Na 2 SO 4 +2H 2 O,

[0030] HNO 3 +NaOH→NaNO 3 +H 2 O,

[0031] h 3 PO 4 +3NaOH→Na 3 PO 4 +3H 2 O,

[0032] CH 3 COOH+NaOH→CH 3 COONa+H 2 O,

[0033] C 6 h 8 o 7 +NaOH→C 6 h 7 o 7 Na+H 2 O,

[0034] C 2 h 4 o 3 +NaOH→C 2 h 3 o 3 Na+H 2 O,

[0035] CH 4 o 3 S+NaOH→CH 3 o 3 SNa+H 2 O;

[0036] In addition, silane usually exists in the form of hydrolysis in neutral aqueous solution, and its specific ch...

Embodiment 2

[0049] This embodiment provides a kind of browning waste liquid treatment method, and it comprises the following steps:

[0050] (1) Add mass concentration to 1000ml browning waste liquid and be 40% sodium hydroxide, until the pH value of browning waste liquid is stable at 6.5, and stir 60min according to the stirring speed of 120rpm, let browning waste liquid Silane is fully hydrolyzed and can fully react to neutralize various inorganic and organic acids.

[0051] (2) In the above stirring process, continue to add sodium hydroxide with a mass concentration of 40% in the browning waste liquid until the pH value of the browning waste liquid rises to a stable value of 9.6, then proceed at a stirring speed of 120rpm Stir for 60 minutes to completely precipitate the copper ions and zinc ions in the browning waste liquid to form a precipitate.

[0052] (3) Next, add a flocculant and a coagulant to the browning waste liquid with precipitates, let stand for stratification, and then ...

Embodiment 3

[0054] This embodiment provides a kind of browning waste liquid treatment method, and it comprises the following steps:

[0055] (1) Add slaked lime to 1000ml browning waste liquid until the pH value of the browning waste liquid is stable at 7.0, and stir at a stirring speed of 120rpm for 60 minutes to fully hydrolyze the silane in the browning waste liquid and fully react Neutralizes various inorganic and organic acids.

[0056] (2) During the above stirring process, continue to add slaked lime to the browning waste liquid until the pH value of the browning waste liquid rises to a stable value of 9.6, then stir for 60 minutes at a stirring speed of 120 rpm to make the browning waste liquid The copper ions and zinc ions in the solution are completely precipitated to form a precipitate.

[0057] (3) Next, add a flocculant and a coagulant to the browning waste liquid with precipitates, let stand for stratification, and then filter with a plate and frame filter press to separate...

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Abstract

The invention discloses a browning waste liquid treatment method, and belongs to the technical field of wastewater treatment. The browning waste liquid treatment method comprises the following steps that firstly, alkaline substances are added into browning waste liquid, so that the pH value of the browning waste liquid is 6 to 8; stirring is performed, so that silane in the browning waste liquid is fully hydrolyzed; next, the alkaline substances are continuously added into the browning waste liquid, so that the pH value of the browning waste liquid is greater than 8.5; stirring is performed; precipitates are generated; then, flocculating agents and coagulant aids are added into the browning waste liquid; still standing for layering is performed; then, through filtering, filter residue andfilter liquid are obtained, i.e., the browning waste liquid treatment can be completed. By the method, silicon alkyl groups in the browning waste liquid can be fully hydrolyzed, so that copper ions completely precipitates; imidazole groups and copper ions form chelates insoluble in water, so that the copper ion concentration and the COD concentration in the browning waste liquid can be obviously reduced to reach the requirements of discharging standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a browning waste liquid treatment method. Background technique [0002] Printed Circuit Board (PCB), which belongs to the electronic equipment manufacturing industry, is a platform for ensuring the electrical interconnection of various electronic components. The polymer substrate used in PCB can be epoxy resin reinforced by glass fiber cloth or phenol, polyamide and other polymers, and browning solution is a treatment solution to improve the bonding between copper and polymer materials in the inner layer of PCB multilayer printed circuit. It can improve the bonding force between multilayer boards. In addition, by treating PCB with browning solution, not only can the specific surface area of ​​the bonding surface be increased, but also a layer of organic metal conversion film can be formed to prevent further corrosion of copper, protect copper lines, and improve acid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30C02F101/20
CPCC02F1/5245C02F1/56C02F1/66C02F2101/20C02F2101/30
Inventor 钟裕林钟裕辉
Owner 深圳市浩天源环保科技有限公司
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