Process for preparing bentonite based sodium with high expension performance by drying method

A sodium-based bentonite, high-expansion technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of long process route, difficulty in realizing large-scale production, and high production cost, and achieve simple production technology and equipment. The effect of strong adaptability and less production equipment

Active Publication Date: 2006-01-25
湖北三鼎科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] 1. Solution ion exchange method: Put raw material bentonite into hot water, add sodium compound (such as NaCl, etc.) high energy consumption
[0009] 2. Storage yard sodiumization method: after mixing wet raw ore with soda ash powder, they are stacked and aged to complete the ion exchange reaction. This method has a high degree of mechanization, but takes a long time
This method requires more equipment, longer process route, higher production cost, and is difficult to achieve large-scale production
[0011] 4. Raymond mill sodiumization method: Chinese Patent Publication No. CN1194940A proposes to combine calcium-based bentonite raw ore containing a certain amount of water with Na 2 CO 3 The method of adding sodium-based bentonite to grinding in a Raymond mill, but this method requires high moisture content of bentonite (moisture content needs to reach 13-18%), and when the moisture content is high, there will be problems with the adaptability of materials and equipment In addition, the reaction time between materials and equipment in this method is relativ

Method used

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  • Process for preparing bentonite based sodium with high expension performance by drying method
  • Process for preparing bentonite based sodium with high expension performance by drying method
  • Process for preparing bentonite based sodium with high expension performance by drying method

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Experimental program
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Effect test

Embodiment 1

[0049] 60g Anji bentonite powder, 6g urea powder and 1.2g Na 2 CO 3 After the powder is mixed evenly, put it in an oven and keep the temperature between 85-120°C for 3 hours. According to the bentonite performance test method (JC / T 593-1995), the expansion ratio and colloid value are tested, and the result is: expansion ratio 41mL / g , Gum price 500mL / 15g.

Embodiment 2

[0051] 100g Anji bentonite powder, 10g urea powder and 3g Na 2 CO 3 After the powder is mixed evenly, put it in an oven, keep the temperature at 85-120°C for 3 hours, and check the expansion ratio and colloid value according to the bentonite performance testing method (JC / T 593-1995), and the result is: expansion ratio 56mL / g , Gum price 500mL / 15g. X-ray diffraction analysis (XRD) was used to detect the structural changes of Anji bentonite before and after treatment. Anji calcium-based bentonite see attached figure 1 , the inter-network spacing d value of its montmorillonite (001) face is 1.50nm; The XRD analysis of the high-expansibility sodium-bentonite after the process of this method is shown in the appendix figure 2 , the grid spacing d value of the montmorillonite (001) surface is reduced to 1.30nm.

Embodiment 3

[0053] 1kg Anji bentonite powder with a moisture content of 11.5%, 50g urea powder and 40g Na 2 CO 3 After the powder is mixed evenly, put it in an oven, keep the temperature between 85-120°C for 3 hours, and check the expansion ratio and colloid value according to the bentonite performance testing method (JC / T 593-1995), and the result is: expansion ratio 80mL / g , Gum price 500mL / 15g. Utilize X-ray diffraction analysis (XRD) to detect the high expansibility sodium bentonite after this method is processed, and the face net spacing d value of its montmorillonite (001) face is reduced to 1.25nm by 1.50nm before processing, see appendix image 3 .

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Abstract

A process for preparing high-expansibility Na-based bentone by dry method includes such steps as proportionally mixing bentone powder, sodium salt powder and urea powder, and heating at 85-120 deg. C for 0.5-5 hr. Its expansibility can reach 40-95 ml/g.

Description

technical field [0001] The invention relates to a dry method for preparing sodium-based bentonite with high expansion performance, and belongs to the technical field of preparation of sodium-based bentonite with high expansion performance. Background technique [0002] Bentonite, also known as bentonite or bentonite, is a clay rock whose main component is montmorillonite—montmorillonite clay rock. Due to the properties of swelling, water absorption, dispersibility, adsorption, catalytic activity, thixotropy, cation exchange and lubrication, bentonite is widely used in metallurgical pellets, foundry sand binders, papermaking, rubber industry fillers, printing and dyeing Rinsing, petrochemicals, daily chemicals, coatings, environmental protection, textiles, medicine, adsorption of radioactive substances, soil improvement, ceramics, new building materials, electrical insulation materials, cosmetics, soap and food, carriers, feed additives, etc. 24 fields 1...

Claims

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Application Information

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IPC IPC(8): C01B33/38C01B33/44
Inventor 严春杰陈洁渝谌刚王乐平吕大丰韩秀山
Owner 湖北三鼎科技有限公司
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