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Method for treating pyridine-containing waste water by adsorption method

An adsorption method and a pyridine technology are applied in the field of using adsorption method to treat pyridine-containing wastewater, which can solve the problems of no pyridine wastewater process research or application report, etc., and achieve the effect of realizing waste recycling.

Inactive Publication Date: 2017-11-21
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to the literature survey, there is no mature resin method to treat pyridine wastewater technology research or application report.

Method used

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Embodiment 1

[0019] A kind of method utilizing adsorption method to treat pyridine-containing wastewater of the present embodiment comprises the following steps:

[0020] Step 1, pretreatment: the waste water produced by producing pyridine is filtered, and the content of pyridine in the waste water is 500 mg / L;

[0021] Step 2. Adsorption: At room temperature, the filtered wastewater obtained in Step 1 is passed through a fixed bed filled with pyridine adsorption resin at a flow rate of 0.8BV / h for adsorption treatment, so that pyridine is adsorbed on the pyridine adsorption resin, and pyridine in the effluent is When the content is below 0.2mg / L, the treatment capacity is 5.5BV;

[0022] Step 3, desorption: at a temperature of 40°C, use a 96% methanol solution of desorption agent to rinse the fixed bed at a flow rate of 0.5BV / h, and elute pyridine from the pyridine adsorption resin to obtain a desorption solution containing pyridine ;

[0023] Step 4, recovery: the desorption liquid obt...

Embodiment 2

[0026] A kind of method utilizing adsorption method to treat pyridine-containing wastewater of the present embodiment comprises the following steps:

[0027] Step 1, pretreatment: the waste water produced by producing pyridine is filtered, and the content of pyridine in the waste water is 400mg / L;

[0028] Step 2. Adsorption: At room temperature, the filtered wastewater obtained in Step 1 is passed through a fixed bed filled with pyridine adsorption resin at a flow rate of 1BV / h for adsorption treatment, so that pyridine is adsorbed on the pyridine adsorption resin. The content of pyridine in the effluent is When it is below 0.2mg / L, the treatment capacity is 5.5BV;

[0029] Step 3, desorption: at a temperature of 45°C, use a 98% methanol solution of desorption agent to rinse the fixed bed at a flow rate of 1 BV / h, elute pyridine from the pyridine adsorption resin, and obtain a desorption solution containing pyridine;

[0030] Step 4, recovery: the desorption liquid obtained ...

Embodiment 3

[0033] A kind of method utilizing adsorption method to treat pyridine-containing wastewater of the present embodiment comprises the following steps:

[0034] Step 1, pretreatment: the waste water produced by producing pyridine is filtered, and the content of pyridine in the waste water is 300mg / L;

[0035] Step 2. Adsorption: At room temperature, the filtered wastewater obtained in Step 1 is passed through a fixed bed filled with pyridine adsorption resin at a flow rate of 3BV / h for adsorption treatment, so that pyridine is adsorbed on the pyridine adsorption resin. The content of pyridine in the effluent is When it is below 0.2mg / L, the treatment capacity is 6BV;

[0036] Step 3, desorption: at a temperature of 35°C, the fixed bed was rinsed with a 96% methanol solution of a desorption agent at a flow rate of 2 BV / h, and pyridine was eluted from the pyridine adsorption resin to obtain a desorption solution containing pyridine;

[0037] Step 4, recovery: the desorption liquid...

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Abstract

The invention discloses a method for treating pyridine-containing waste water by an adsorption method. The method comprises the following steps: 1, performing pretreatment: performing filtering treatment on waste water generated by production of pyridine; 2, performing adsorption: performing adsorption treatment on the filtered waste water obtained in the step 1 at the flow velocity of 0.8 BV / h to 3 BV / h through a fixed bed filled with pyridine adsorbing resin, so that the pyridine is adsorbed on the pyridine adsorbing resin; 3, performing desorption: rinsing the fixed bed by using a desorbent at the flow velocity of 0.5 BV / h to 2 BV / h at the temperature being more than or equal to 35 DEG C, and eluting the pyridine from the pyridine adsorbing resin to obtain pyridine-containing desorbing liquid; and 4, recycling: performing concentration treatment on the desorbing liquid obtained in the step 3, and rectifying and recycling the desorbent. The waste water of pyridine production is treated by the adsorbing resin, the removal rate of removing the pyridine from the waste water of pyridine production is more than 99 percent, guarantee is provided for subsequent deep standard treatment of the waste water or water recycling, and waste recycling is realized while the waste water is treated.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating pyridine-containing wastewater by using an adsorption method. Background technique [0002] Pyridine (pyridine), also known as nitrogen (hetero)benzene, is a six-membered nitrogen heterocyclic compound. It is liquid at room temperature. Because the nitrogen atom on the ring can form hydrogen bonds with water, it is miscible with water. The boiling point is 115.2 ° C, and the molecular weight is 79.1. Density 1.98g / cm -3 . Pyridine has a wide range of uses. In agricultural chemical industry, it can be used to synthesize herbicide paraquat, insecticide methyl poison, etc.; in textile industry, it can be used to synthesize chromogenic BB, soluble reduced violet 14R, etc.; it can also be used To synthesize pharmaceutical intermediates such as 2-chloropyridine, 2-picoline, 2-chloro-3-nitropyridine and 2-chloro-4-aminopyridine. The wastewater produ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F101/38
CPCC02F1/001C02F1/285C02F2101/38C02F2303/16
Inventor 蔡建国石洪雁朱小龙
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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