Method for preparing montmorillonite forming adsorbent

A technology of adsorbent and montmorillonite, which is applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, silicate, etc., can solve the problems of reduced adsorption performance, high temperature, and easily damaged structure, so as to reduce adverse effects, The effect of reducing swelling

Inactive Publication Date: 2012-07-11
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the temperature required for the volatilization of combustibles is high, which easily destroys the structure of the main component montmorillonite and reduces the adsorption performance.

Method used

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  • Method for preparing montmorillonite forming adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) adopting purity is 90%, and cation exchange capacity CEC is 70mmol / 100g, and colloid price is 60ml / g, and expansion times is 10ml / g, and blue absorbing amount is the powdery sodium montmorillonite of 35g / 100g;

[0021] (2) Add molding agent to powdery sodium montmorillonite, and add appropriate amount of water to stir into micelles, the mass ratio of molding agent to powdery sodium montmorillonite is 5:100; place micelles in extrusion In the molding machine, it is pressed into rubber strips at normal temperature; the molding agent is NaHCO 3 , NaOH, KOH or Na 2 CO 3 ;

[0022] (3) Aging the rubber strip for 2 hours at room temperature with a relative humidity of 50%, so that the montmorillonite in the rubber strip fully reacts with the forming agent and combines compactly;

[0023] (4) Place the aged rubber strip in a drying oven with a temperature of 100° C. for 2 hours;

[0024] (5) Put the dried strips in a high-temperature furnace, bake them for 50 minutes a...

Embodiment 2

[0030] (1) adopting purity is 92%, and cation exchange capacity CEC is 80mmol / 100g, and colloid price is 80ml / g, and expansion times is 10ml / g, and blue absorption amount is the powdery sodium montmorillonite of 38g / 100g;

[0031] (2) Add molding agent to powdery sodium montmorillonite, and add appropriate amount of water to stir into micelles, the mass ratio of molding agent to powdery sodium montmorillonite is 11:100; place micelles in extrusion In the molding machine, it is pressed into rubber strips at normal temperature; the molding agent is NaHCO 3 , NaOH, KOH or Na 2 CO 3 ;

[0032] (3) Aging the rubber strip at room temperature with a relative humidity of 30% for 2.5 hours, so that the montmorillonite in the rubber strip and the molding agent fully react and combine densely;

[0033] (4) Dry the aged strips in a drying oven at a temperature of 110°C for 2.5 hours;

[0034] (5) Put the dried rubber strip in a high-temperature furnace, bake it at 600°C for 30 minutes...

Embodiment 3

[0040] (1) adopting purity is 95%, and cation exchange capacity CEC is 75mmol / 100g, and colloid price is 60ml / g, and expansion times is 12ml / g, and blue absorption amount is the powdery sodium-based montmorillonite of 40g / 100g;

[0041] (2) Add molding agent to powdery sodium montmorillonite, and add appropriate amount of water to stir into micelles, the mass ratio of molding agent to powdery sodium montmorillonite is 3:100; place micelles in extrusion In the molding machine, it is pressed into rubber strips at normal temperature; the molding agent is NaHCO 3 , NaOH, KOH or Na 2 CO 3 ;

[0042] (3) Aging the rubber strip for 1 hour at room temperature with a relative humidity of 70%, so that the montmorillonite in the rubber strip fully reacts with the forming agent and combines compactly;

[0043] (4) Dry the aged strips in a drying oven at 120°C for 1 hour;

[0044](5) Put the dried strips in a high-temperature furnace, bake them for 40 minutes at a temperature of 500° C...

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Abstract

The invention discloses a method for preparing a montmorillonite forming adsorbent. The method comprises the following steps of: 1, taking powdery sodium-based montmorillonite; 2, adding a forming agent into the powdery sodium-based montmorillonite, stirring the mixture to form micelle, and putting the micelle into a forming machine and pressing the micelle into glue strips; 3, ageing; 4, drying;and 5, roasting, crushing and screening. The method for preparing the powdery sodium-based montmorillonite into the montmorillonite forming adsorbent does not change good adsorption performance of the montmorillonite, scientifically and effectively utilizes the effective ingredients and physicochemical properties of the montmorillonite, reduces the swelling property of the montmorillonite and reduces adverse effect of wastewater treatment subsequent processes.

Description

technical field [0001] The invention belongs to the technical field of sewage and waste water treatment, and in particular relates to a preparation method of a montmorillonite shaped adsorbent. Background technique [0002] Montmorillonite is rich in reserves in our country, and its unique mineral properties and physical and chemical properties have attracted the attention of many experts and scholars in recent years, and extensive research has been carried out in various fields. Its main direction is the modification of natural montmorillonite. [0003] The use of montmorillonite to prepare shaped adsorbents is a new way for the deep processing of clay minerals and the popularization and application of efficient and cheap adsorbents. Due to the strong hydrophilicity of the silicon-oxygen structure on the surface of montmorillonite and the hydrolysis of interlayer cations, there is usually a thin water film on the surface, and the general organic pollutants are hydrophobic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28
Inventor 郑重杨世鹏
Owner XIAN UNIV OF SCI & TECH
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