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Plastic-skeleton bentonite bentonite composite adsorbent and its production

A composite adsorption, plastic skeleton technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low preparation efficiency, difficult to popularize and apply, secondary pollution, etc.

Inactive Publication Date: 2007-11-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these patented technologies use a large amount of chemical agents, and the preparation in a solution environment is prone to secondary pollution. The preparation process is relatively complicated (including drying, mixing, reaction, aging, filtering, etc.), and the preparation time is long. Generally, it takes several hours, even tens of hours
Cause problems such as low preparation efficiency, high cost, and difficulty in popularization and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 45wt% of natural bentonite, add 10wt% of fly ash and steel slag as auxiliary selective adsorption raw materials, add them to a high-speed mixer, stir for 30 minutes, then add 30wt% of thermoplastic polymer polyethylene, continue to stir for 15 minutes, and finally add foam The pore-forming raw material azodicarbonamide is 5wt%, and stirred for another 15 minutes. Then add the mixed sample into the feeding hopper of the twin-screw plastic extruder, and wait for each section of the twin-screw plastic extruder to reach the set heating temperature (160°C for the conveying section, 180°C for the plasticizing section, and 180°C for the melting section). 200°C, 220°C in the compression extrusion section), start the main engine to extrude, and obtain a thin strip product, which directly enters the water tank for cooling and drying, and then sends it to an automatic pelletizer for pelletizing, and finally obtains a 3mm granular adsorbent.

[0020] The plastic skeleton type ...

Embodiment 2

[0022] Take 80wt% of natural bentonite, add it into a high-speed mixer, stir for 30 minutes, then add 20wt% of thermoplastic polymer polypropylene, and continue stirring for 15 minutes. Then add the mixed sample into the feeding hopper of the twin-screw plastic extruder, and wait for each section of the twin-screw plastic extruder to reach the set heating temperature (180°C for the conveying section, 190°C for the plasticizing section, and 190°C for the melting section). 220°C, 220°C in the compression extrusion section), start the main engine to extrude, and obtain a thin strip product, which directly enters the water tank for cooling and drying, and then sends it to an automatic pelletizer for pelletizing, and finally obtains a 3mm granular adsorbent.

[0023] The plastic skeleton type bentonite composite adsorbent is not pulverized in water, and is used for treating waste water containing heavy metal ions such as copper, chromium and lead, and the removal rate of heavy metal...

Embodiment 3

[0025] Take 60wt% of natural bentonite, add 5wt% each of active carbon and blast furnace slag for auxiliary selective adsorption, add to a high-speed mixer, stir for 30 minutes, then add 25wt% of thermoplastic polymer polyvinyl chloride, continue to stir for 15 minutes, and finally add The foaming pore-forming raw material sodium bicarbonate was 5 wt%, and stirred for another 15 minutes. Then add the mixed sample into the feeding hopper of the twin-screw plastic extruder, and wait for each section of the twin-screw plastic extruder to reach the set heating temperature (190°C for the conveying section, 200°C for the plasticizing section, and 200°C for the melting section). 220°C, 230°C in the compression extrusion section), start the main engine to extrude, and obtain a thin strip product, which directly enters the water tank for cooling and drying, and then sends it to an automatic pelletizer for pelletizing, and finally obtains a 3mm granular adsorbent.

[0026] The plastic s...

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Abstract

The invention is concerned with the plastic framework-style bentonite composite sorbent and the preparation method. The crude bentonite or the character-changed bentonite is the main material for the composite sorbent, the thermoplastic macromolecule polymer is as the framework connecting material and also add the assistant selective material, the blowing hole-make material by the working procedure such as mixture, model melt extrude, dryness and cut grain. The preparation method is dry preparation method with simple process and without secondary pollution, the product can adjust the powder intensity, the size of the hole, the porosity, the density and the adsorbing selectivity according to the change of the selected group and dosage. The sorbent is not easy pulverization in water which can use for waste water dispose with heavy metal ion and organic infectant.

Description

1. Technical field [0001] The invention relates to an adsorbent suitable for water and waste water treatment, in particular to a plastic skeleton type bentonite composite adsorbent. 2. Background technology [0002] Bentonite is a clay rock mainly composed of montmorillonite. Its mineral composition and structure make it exhibit many excellent special properties, so it is called "universal clay". It has a wide range of applications. In recent years, with the continuous strengthening of environmental protection, in order to reduce the cost of environmental governance, the world attaches great importance to the development and application of bentonite as an adsorption material for water and wastewater treatment. The basis of bentonite as an adsorption material for water and wastewater treatment is its excellent adsorption and cation exchange properties, and it has a wide range of sources and is cheap, and it is expected to replace expensive activated carbon...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/12C02F1/28
Inventor 马少健莫伟苏秀娟胡治流林美群王桂芳杨金林杨梅金
Owner GUANGXI UNIV
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