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Preparation method and application of zeolite type phosphorus removal agent for high-salt waste liquid

A technology of high-salt waste liquid and phosphorus removal agent, which is applied in the directions of crystalline aluminosilicate zeolite, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low phosphorus removal rate and long hydrothermal time, etc. Efficiency, ease of operation, simple effect of preparation process

Pending Publication Date: 2021-10-01
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The existing method of preparing zeolite dephosphorization agent mainly synthesizes zeolite dephosphorization agent by using fly ash as raw material, using fly ash for acid activation, hydrothermal crystallization with sodium hydroxide, impregnation with magnesium chloride and calcium chloride Modified to obtain zeolite phosphorus removal agent, the synthesis of this method may introduce Ca 2+ And the hydrothermal time is longer, the removal rate of phosphorus in saline solution is not high

Method used

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  • Preparation method and application of zeolite type phosphorus removal agent for high-salt waste liquid
  • Preparation method and application of zeolite type phosphorus removal agent for high-salt waste liquid
  • Preparation method and application of zeolite type phosphorus removal agent for high-salt waste liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of zeolite phosphorus removal agent:

[0029] (1) Nickel slag is purchased from Jiangsu Yancheng Xiangshui Delong Nickel Industry Co., Ltd., kaolin is purchased from Henan Hengyuan New Material Co., Ltd., ball milled to 200 mesh nickel slag, and nickel slag and kaolin are mixed evenly according to the ratio of 7.5:17.5. Mix with sodium hydroxide at a mass ratio of 1:1, add distilled water and a magnetic stirrer at 80°C for 2 hours at a liquid-solid ratio of 200mL / 25g to obtain a mixed slurry;

[0030] (2) Put the above mixed slurry into 120° C. and heat it in a reactor for 6 hours, filter, wash and dry the reacted material to obtain P1 zeolite;

[0031] (3) the above-mentioned P1 type zeolite, and AlCl 3 6H2O was mixed vigorously in a magnetic stirrer at room temperature for 24 hours according to the mass ratio of 1:1 and the solid-to-liquid ratio of 10g / 100mL, then filtered, washed, and dried to obtain a modified zeolite dephosphorization agent, wherein th...

Embodiment 2

[0034] Preparation of zeolite-type dephosphorization agent: Step (1) is the same as in Example 1, (2) put the above mixed slurry in a reactor at 95°C for 7 hours, filter, wash and dry the reacted material to obtain P1 Zeolite; (3) P1 type zeolite, with polyferric sulfate in a mass ratio of 1:1, with a solid-to-liquid ratio of 10g / 100mL, was vigorously mixed in a magnetic stirrer at room temperature for 24 hours, filtered, washed, and dried to obtain a modified zeolite-removed Phosphorus agent, wherein the amount of washing water is 40ml of distilled water per 1g of modified zeolite material.

[0035] Dephosphorization effect measurement: The measurement procedure is the same as in Example 1, and the dephosphorization results are shown in Table 1.

Embodiment 3

[0037] Preparation of zeolite-type dephosphorization agent: Step (1) is the same as in Example 1, (2) put the above mixed slurry into a reactor at 145°C for 6 hours, filter, wash and dry the reacted material to obtain P1 Zeolite; In step (3), P1 type zeolite, with ZrOCl 2 ·8H 2 O according to the mass ratio of 1:1, solid-to-liquid ratio of 10g / 100mL, mixed vigorously in a magnetic stirrer at room temperature for 20h, filtered, washed, and dried to obtain a modified zeolite dephosphorization agent.

[0038] Dephosphorization effect measurement: The measurement procedure is the same as in Example 1, and the dephosphorization results are shown in Table 1.

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Abstract

The invention discloses a preparation method and application of a zeolite type phosphorus removal agent for high-salt waste liquid, and the preparation method comprises the following steps: (1) carrying out ball milling treatment on nickel slag, and adding kaolin and sodium hydroxide into the nickel slag after ball milling to obtain a mixed material; adding water into the mixed material and uniformly stirring to obtain mixed slurry; (2) carrying out hydrothermal reaction on the mixed slurry in the step (1), and after the reaction is finished, performing filtering, washing and drying to obtain P1 type zeolite; (3) impregnating zeolite in the modifier to obtain a modified zeolite material, and washing, drying and grinding the modified zeolite material to obtain the zeolite type phosphorus removal agent. The nickel slag is adopted as the raw material, the comprehensive utilization rate of the nickel slag is increased, the nickel slag is low in price, and the preparation cost of the zeolite salt-resistant phosphorus removal agent for the high-salt wastewater is reduced; in salt-containing wastewater, the phosphorus removal rate of the zeolite type phosphorus removal agent can reach 98% or above.

Description

technical field [0001] The invention relates to a preparation method of a zeolite-type dephosphorization agent, in particular to a preparation method and application of a zeolite-type dephosphorization agent for high-salt waste liquid. Background technique [0002] Glyphosate is a high-efficiency, broad-spectrum, low-toxic organophosphorus herbicide, which is used in large amounts in agricultural production. At present, glyphosate is mainly produced by glycine synthesis method, which will produce a large number of by-products. Salt production, the by-product salt contains organic phosphorus components such as glyphosate, and the waste salt can remove the nitrogen-containing organic impurities in it after high-temperature oxygen cracking, and convert organic phosphorus into inorganic phosphorus. The by-product salt cannot be used for production due to its high phosphorus content. At present, the methods of dephosphorization of wastewater are mainly divided into physical meth...

Claims

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Application Information

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IPC IPC(8): C01B39/02B01J20/18B01J20/30C02F1/28C02F1/58C02F101/10
CPCC01B39/02C01B39/026B01J20/18B01J20/186C02F1/281C02F1/58B01J2220/4806C02F2101/105C01P2002/72C01P2004/03
Inventor 吴其胜江铭张伟建崔咪芬习本军韩庆文
Owner YANCHENG INST OF TECH
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