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Xanthation bentonite absorbingsubstance and method for preparing the same

A technology of xanthate and sodium bentonite, which is applied in the fields of xanthate bentonite, preparation of xanthate bentonite, and heavy metal ion adsorbent, can solve the xanthate of bentonite and its application that have not been reported, preparation process and equipment requirements High, time-consuming and labor-intensive application process, etc., to achieve the effects of environmental protection, less dosage, and easy operation

Inactive Publication Date: 2007-12-05
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its raw materials are relatively expensive, the preparation process and equipment requirements are high, the process is relatively complicated, and the application process is time-consuming and labor-intensive, so there are certain defects.
[0005] Various modification methods such as acid activation, salt activation, and organic modification of bentonite and the application of their products have been reported, but there is no report on the xanthification of bentonite and its application.

Method used

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  • Xanthation bentonite absorbingsubstance and method for preparing the same
  • Xanthation bentonite absorbingsubstance and method for preparing the same
  • Xanthation bentonite absorbingsubstance and method for preparing the same

Examples

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Embodiment 1

[0032] Example 1: Add 20g of sodium bentonite to 120mL of distilled water, stir to disperse evenly, add 8g of NaOH, stir at 35°C for 1 hour, add CS dropwise 2 2.41mL, after reacting for 1h, add 5.0g magnesium sulfate and 50mL H 2 O, continue to stir at a constant temperature of 35°C for 30min, filter with suction, wash with 5-10% magnesium sulfate solution for 3-5 times until the filtrate is colorless, and then wash with acetone for 3 times to obtain a light blue-green solid. Vacuum dried for 10 h to obtain product XB1 with a yield of 31.3 g.

Embodiment 2

[0033] Embodiment 2: preparation process and raw material etc. are identical with embodiment 1, and wherein, the add-on of NaOH is 8g, CS 2 The amount of dropping was 7.23mL, and the reaction time was 1h to obtain the XB2 product with a yield of 28.4g.

Embodiment 3

[0034] Embodiment 3: preparation process and raw material etc. are identical with embodiment 1, and wherein, the add-on of NaOH is 8g, CS 2 The amount of the dropwise addition was 7.23mL, and the reaction time was 6h to obtain the XB3 product with a yield of 26.4g.

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Abstract

The present invention is xanthated bentonite as one kind of metal ion adsorbent with high adsorption capacity and its preparation process. The metal ion adsorbent with high adsorption capacity is prepared with bentonite sodium as material, and through dispersing, alkalization, reacting with SO2, and treating with magnesium salt to form stable magnesium salt of xanthated bentonite. The xanthated bentonite has powerful adsorption on heavy metal ion, and may be used in treating waste water containing heavy metal ion. Treating waste water containing heavy metal ion with the xanthated bentonite has the features of simple operation, high speed, high metal ion eliminating rate, easy solid-liquid separation, etc.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a heavy metal ion adsorbent in the treatment of heavy metal wastewater, in particular to a heavy metal ion adsorbent with high adsorption capacity—xanthated bentonite, and also to a preparation method of xanthated bentonite . Background technique [0002] With the advancement of science and technology and the rapid development of industry and agriculture, people's material living standards continue to improve. However, environmental pollution is also becoming more and more serious. Environmental protection and environmental governance issues are getting more and more attention from the government and all walks of life. An important source of pollution that pollutes the environment and water quality is heavy metal ions in industrial wastewater. Heavy metal wastewater mainly comes from mechanical processing, mining, smelting of steel and non-ferrous metals, and some chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/22C02F1/62
Inventor 王荣民李芳蓉何玉凤李芳莹
Owner NORTHWEST NORMAL UNIVERSITY
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