Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for modifying attapulgite by industrial semi-wet method

A technology for modifying attapulgite and attapulgite, which is applied in the field of modification and application of attapulgite, which can solve the problems of difficult dehydration work, easy damage to the rod crystal structure of attapulgite, and easy aggregation, so as to improve the modification effect and Production efficiency, improvement of dispersion and distribution characteristics, and effect of improving interface binding force

Active Publication Date: 2016-08-17
常州苏橡橡塑制品有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional attapulgite clay beneficiation methods mainly include dry method and wet method; the dry method mainly adopts the process of grinding and grading, but the dry method is easy to destroy the rod crystal structure of attapulgite clay, and the particle size of attapulgite obtained by grinding It is thicker, which seriously limits its application; wet dressing purification is mainly based on the separation of attapulgite and impurity minerals in terms of physical and structural properties, but because attapulgite is fine and sticky, the concentration is very thin during separation, resulting in subsequent dehydration work Difficult, and the properties of attapulgite are easily destroyed during the beneficiation process, causing serious water pollution
However, due to the high surface energy of attapulgite after ore dressing, purification, and dissociation of rod crystal bundles, the surface contains a large number of hydroxyl groups, which are easy to aggregate and have poor compatibility with rubber-like organic polymer matrices.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for modifying attapulgite by industrial semi-wet method
  • Method for modifying attapulgite by industrial semi-wet method
  • Method for modifying attapulgite by industrial semi-wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1) Compound KH550 and Si-69 with a mass ratio of KH550:Si-69 =5.0:5.0 to prepare a compound coupling agent;

[0029] Step 2) Add the complex coupling agent prepared in step 1) to the attapulgite, and the amount of the complex coupling agent added is 2.0wt.% of the mass of the attapulgite; then put it into a heating kneader for Mixing and stirring, the stirring speed is 42 rpm, and the temperature is slowly raised while stirring. When the temperature of the material rises to 85° C., stir at a constant temperature for 2 hours to obtain a coupling agent modified attapulgite;

[0030] Step 3) Add an activated dispersant to the coupling agent modified attapulgite obtained in step 2), and the amount of stearic acid added to the activated dispersant is 0.75wt.% of the mass of the attapulgite; use a heating kneader to continue When stirring and heating up to 96°C, carry out discharge;

[0031] Step 4) The material obtained in step 3) is transported to the vibrating disc d...

Embodiment 2

[0035] Step 1) Compound KH590 and Si-69, the mass ratio is KH590:Si-69=3.4:6.6, to prepare compound coupling agent;

[0036] Step 2) Add the complex coupling agent prepared in step 1) to the attapulgite, and the amount of the complex coupling agent added is 1.5wt.% of the mass of the attapulgite; then put it into a heating kneader for Mixing and stirring, the stirring speed is 42 rpm, and the temperature is slowly raised while stirring. When the temperature of the material rises to 85°C, stir at a constant temperature for 2.5 hours to obtain a coupling agent modified attapulgite;

[0037] Step 3) Add an activated dispersant to the coupling agent-modified attapulgite prepared in step 2), the activated dispersant is polyethylene wax, and the amount added is 0.7wt.% of the attapulgite mass; kneading by heating When the machine continues to stir and heats up to 96°C, discharge the material;

[0038] Step 4) The material obtained in step 3) is transported to the vibrating disc dry...

Embodiment 3

[0043] Step 1) Compound maleic anhydride, KH590 and Si-69 in a mass ratio of maleic anhydride: KH590: Si-69=4.5:3.0:2.5 to prepare a compounded coupling agent;

[0044] Step 2) Add the complex coupling agent prepared in step 1) to the attapulgite, and the amount of the complex coupling agent added is 3.5wt.% of the mass of the attapulgite; then put it into a heating kneader for Mixing and stirring, the stirring speed is 42 rpm, and the temperature is slowly raised while stirring. When the temperature of the material rises to 85 ° C, the constant temperature is stirred for 3 hours, and the coupling agent modified attapulgite is obtained;

[0045] Step 3) Add an activated dispersant to the coupling agent-modified attapulgite obtained in step 2), and the amount of stearic acid added to the activated dispersant is 0.8wt.% of the mass of the attapulgite; use a heating kneader to continue When stirring and heating up to 96°C, carry out discharge;

[0046] Step 4) The material obtai...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides an industrial semi-wet method for modifying attapulgite, which includes preparing a compound coupling agent, mixing the compound coupling agent with attapulgite, drying, discharging, and grinding to prepare modified Attapulgite, the attapulgite modified by semi-wet method has the characteristics of good effect, low pollution and suitable for industrial production. In addition, the modified attapulgite has the same strength as medium structure carbon black and precipitation method Reinforcement, and can improve the heat air aging resistance of rubber products, reduce the cost of rubber products.

Description

technical field [0001] The invention relates to a method for modifying attapulgite by an industrial semi-wet method, and belongs to the technical field of modification and application of attapulgite. Background technique [0002] Natural attapulgite minerals are a kind of hydrous magnesium-aluminosilicate clay minerals with layer chain transition structure. Due to the different formation environments, attapulgite minerals contain a considerable proportion of paragenetic impurities, such as montmorillonite, illite, Halloysite and quartz sand, etc. The existence of impurities affects its performance and limits its application. In order to make the performance of attapulgite meet the requirements of functional rubber additives, mineral processing and purification are required before modification. The traditional attapulgite clay beneficiation methods mainly include dry method and wet method; the dry method mainly adopts the process of grinding and grading, but the dry method i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08K13/06C08K9/06C08K9/04C08K3/36C08K3/34
Inventor 张小萍仲崇盟杨慧刘琼琼赵桂英
Owner 常州苏橡橡塑制品有限公司