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Method for treating flourescent brightener wastewater with phosphorus

A technology of fluorescent whitening agent and treatment method, which is applied in the field of treatment of wastewater containing fluorescent whitening agent 4,4'-bis-biphenyl, can solve problems such as unsatisfactory results, and achieve small equipment footprint and high treatment efficiency. The effect of cost reduction and short construction period

Active Publication Date: 2013-12-11
山西晋光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Therefore, if the chemical and biological wastewater treatment technologies widely used in industry are used to treat the FB-351 production wastewater, satisfactory results cannot be obtained.
At present, domestic research on this type of wastewater treatment is relatively small, and there is no very successful example so far. It can be seen that the study of FB-351 wastewater treatment is of great significance to solving water pollution problems and protecting the environment.

Method used

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  • Method for treating flourescent brightener wastewater with phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Put 2.5 tons of phosphorus-containing fluorescent whitening agent wastewater into the acidification kettle through a sewage pump, add 23kg of hydrochloric acid to adjust the pH=2.5, and stir for 2.5 hours;

[0030] (2) Transfer the acidic material in the acidification kettle to the distillation kettle through the transfer pump, raise the temperature to 100°C-110°C, and carry out rough distillation of the waste water under the pressure of -0.07Mpa, and all the fractions are collected by the condenser for rectification cauldron;

[0031] (3) When the material in the acidification tank is concentrated to a solid content of 75%, it is transferred to a centrifuge for solid-liquid separation, and the centrifuged filtrate enters the rectification tank, and the generated solid salt waste residue is bagged for centralized treatment;

[0032] (4) The material in the rectification kettle is distilled through the multi-effect evaporation system, and the low-boiling point fracti...

Embodiment 2

[0036] (1) Put 2.5 tons of phosphorus-containing fluorescent whitening agent wastewater into the acidification kettle through a sewage pump, add 23kg of hydrochloric acid to adjust pH=3.0 and stir for 2.0 hours;

[0037] (2) Transfer the acidic material in the acidification kettle to the distillation kettle through the transfer pump, raise the temperature to 100°C-110°C, and carry out crude distillation on the waste water under the pressure of -0.08Mpa, and all the fractions are collected through the condenser for rectification cauldron;

[0038] (3) When the material in the acidification tank is concentrated to a solid content of 70%, it is transferred to a centrifuge for solid-liquid separation, and the centrifuged filtrate enters the rectification tank, and the generated solid salt waste residue is bagged for centralized treatment;

[0039] (4) The material in the rectification kettle is distilled through the multi-effect evaporation system, and the low-boiling point fracti...

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Abstract

The invention discloses a method for treating flourescent brightener wastewater with phosphorus. The method mainly comprises the following steps: acidifying, distilling, centrifuging, carrying out biochemical treatment, carrying out ozonation oxidation and the like. Byproducts in the wastewater can also be recycled and machined. The flourescent brightener wastewater can meet the emission standard after being treated by using the process. The method for treating the flourescent brightener wastewater with phosphorus, disclosed by the invention, is particularly applicable to treatment on biphenyl flourescent brightener wastewater, good in effect, low in operation and maintaining cost, convenient to manage and easy to popularize.

Description

technical field [0001] The patent of the present invention relates to a treatment method for phosphorous fluorescent whitening agent wastewater, specifically a treatment method for wastewater containing fluorescent whitening agent 4,4'-bis-(2-sodium sulfonate styrene-yl)biphenyl. Background technique [0002] Distyryl biphenyl fluorescent whitening agent, because of its good water solubility, has a good whitening effect on cotton fabrics, polyester fibers, protein fibers, acetate fibers, etc., and is also an excellent detergent, laundry detergent, cosmetics Such as whitening additives, are widely used. The most widely used distyryl biphenyl type fluorescent whitening agent at home and abroad is 4,4'-bis-(2-sodium styryl sulfonate) biphenyl (hereinafter referred to as: FB-351). [0003] In the post-treatment purification process of producing FB-351, in order to improve the recovery rate of the product, it is necessary to add a large amount of inorganic salt for salting out, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C07F9/11C02F1/66C02F1/04C02F1/38C02F1/78
Inventor 韩卫高飞张召来
Owner 山西晋光化工有限公司