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A waste acid recycling process based on nanocomposite carrier retardation method

A nano-composite, treatment process technology, applied in the direction of metallurgical wastewater treatment, filtration treatment, special treatment goals, etc., can solve the problems of low acid recovery rate, high operating cost, unstable operation of waste acid concentration device, etc., and achieve high separation rate , the effect of low operating costs

Inactive Publication Date: 2018-08-17
SEEWATER ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to implement, it needs to consume a large amount of alkali, the operation cost is high, and it will cause secondary pollution such as solid waste;
[0005] (2) Evaporation and concentration method: due to the high concentration of metal salts in the waste acid, it will be precipitated with the continuous concentration of the waste acid, and the precipitated metal salts will easily block the concentration device, making the waste acid concentration device unable to operate stably; at the same time, the evaporation concentration method Due to the high energy consumption, the treatment cost per ton of acid is high;
However, due to the acid retardation method has special requirements for the selected strong basic anion exchange resin, which requires uniform particle size and extremely small particle size, the current domestically produced strong basic anion exchange resin cannot meet this requirement, and can only be imported from abroad. Imported, leading to acid retardation method Due to the cost of the core acid retardation resin, its industrial application is limited
At the same time, the metal ion removal rate of the acid block method with strong basic anion exchange resin as the core is only 60%-70%. Some industries that require higher metal ion removal rates, such as titanium dioxide, hydrometallurgy, chemical industries such as
[0008] In summary, it can be seen that the processes currently promoted in the field of waste acid resource treatment have problems such as low acid recovery rate, low recovery concentration, low metal ion removal rate, high investment cost, high operating cost, and secondary pollution. problems, which greatly limit the promotion and application of the above methods in the industry

Method used

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  • A waste acid recycling process based on nanocomposite carrier retardation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Suspension copolymerization

[0043] In a 3000L polymerization reaction kettle, add 1275kg of NaCl solution with a mass percentage of 4%, add 2.5kg of polyvinyl alcohol with a degree of polymerization of 1000 and a degree of alcoholysis of preferably 80%, and heat to 55 ° C to make the polyvinyl alcohol fully Disperse in the solution; add 235kg of divinylbenzene, 265kg of styrene, 125kg of liquid wax, 125kg of toluene, 100kg of xylene, and 2.5kg of benzoyl peroxide with a mass percentage of 50%, mix well, and keep the temperature at 45~55℃ , At the same time, the mixer was stirred at a constant speed of 800r / min for 1h.

[0044] After 1 h, the temperature was raised to 77 °C and kept for 4 h; then, the temperature was raised to 87 °C and kept for 3 h; the temperature was raised to 97 °C, and the temperature was kept for 5 h, and then the NaCl solution in the reaction kettle was released to prepare Copolymer I.

[0045] (2) Washing and drying

[0046] The copolyme...

Embodiment 2

[0055] (1) Suspension copolymerization

[0056] In a 7000L polymerization reactor, add 5250kg of NaCl solution with a mass concentration of 6%, add 14kg of polyvinyl alcohol with a degree of polymerization of 2000 and a degree of alcoholysis of preferably 85%, and heat to 55°C to fully disperse the polyvinyl alcohol in the In the solution; add 60% divinylbenzene 335kg, styrene 365kg, liquid wax 445kg, toluene 345kg, xylene 260kg, benzoyl peroxide 7.7kg, mix well, keep the temperature at 45~55 ℃, simultaneously , and the mixer was stirred at a constant speed of 1000r / min for 1h.

[0057] After 1h, the temperature was raised to 77°C and kept for 4.5h; then, the temperature was raised to 87°C and kept for 3.5h; the temperature was raised to 97°C, and the temperature was kept for 6.5h, and then the NaCl solution in the reaction kettle was released , the copolymer sphere I was prepared.

[0058] (2) Washing and drying

[0059] The copolymerized sphere I obtained in step 1 was tr...

Embodiment 3

[0068] (1) Suspension copolymerization

[0069] In a 5000L polymerization reactor, add 4400kg of NaCl solution with a mass concentration of 5%, add 10kg of polyvinyl alcohol with a degree of polymerization of 1500 and an alcoholysis degree of preferably 83%, and heat to 55°C to fully disperse the polyvinyl alcohol in the In the solution; add 70% divinylbenzene 400kg, styrene 600kg, liquid wax 450kg, toluene 400kg, xylene 350kg, benzoyl peroxide 10kg, mix well, keep the temperature at 45~55 ℃, meanwhile, The mixer was stirred at a constant speed of 900r / min for 1.5h.

[0070] After 1.5h, the temperature was raised to 77°C and kept for 5h; then, the temperature was raised to 88°C and kept for 4h; the temperature was raised to 97°C and the temperature was kept for 7h, and then the NaCl solution in the reaction kettle was released to prepare The copolymer sphere I was obtained.

[0071] (2) Washing and drying

[0072] The copolymerized sphere I obtained in step 1 was transferre...

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Abstract

The invention discloses a waste acid resourceful treatment process based on a nano-composite carrier retarding method. The process comprises the following steps that primary filtration is carried out, wherein acid pickle is filtrated, and suspended matter, oil and colloidal matter in the acid pickle are separated out primarily; secondary filtration is carried out, wherein a secondary filter is used for further removing residual particles in primary filtration penetrating liquid; acid retarding separation is carried out, wherein the filtrated acid pickle is treated through an acid retarding separation device which contains an acid retarding carrier SEW-501, and the carrier carries sulfonate radical and a quaternary ammonium group; when the acid pickle passes through the acid retarding separation device, acid molecules in the acid pickle are retarded on the acid retarding carrier, other impurities in the acid pickle penetrate through the acid retarding carrier to flow out of the acid retarding separation device in the mode of penetrating liquid, and therefore acid modules in the acid pickle are retarded in the acid retarding separation device; after the acid retarding carrier is saturated, resolving water is pumped into the acid retarding separation device to dissolve out acid modules in the acid retarding carrier, and finally pure acid is produced.

Description

technical field [0001] The invention relates to a waste acid recycling process based on a nano-composite carrier retardation method, in particular to a waste acid recycling process in metal surface treatment, hydrometallurgy, chemical industry and other industries, and belongs to the technical field of industrial waste acid recycling . The invention also relates to an industrial waste acid recycling and processing device. Background technique [0002] With the shortage of energy, shortage of resources and serious environmental pollution, environmental protection has become a global issue and has attracted the attention of the whole society and all mankind. In the production process of metal surface treatment, hydrometallurgy, chemical industry and other industries, a large amount of waste acid is generated. For example, in the metal finishing industry, strong inorganic acids such as sulfuric acid, nitric acid, and hydrochloric acid are commonly used to remove metal surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F103/16
CPCC02F1/001C02F1/44C02F1/444C02F9/00C02F2103/16C02F2301/08C02F2303/16
Inventor 王文波王颜亭
Owner SEEWATER ENVIRONMENTAL ENG