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Production process of rectorite for nano composite material

A technology of nanocomposite materials and production methods, which is applied in the field of polymer compound compositions, can solve the problems of long production time, complex process, and various equipment, and achieve increased dispersion performance, good dispersion suspension, and good sorting effect Effect

Inactive Publication Date: 2004-08-18
湖北名流累托石科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic purification of montmorillonite adopts the method of adding dispersant and then relying on natural sedimentation. The disadvantage is that the production takes a long time and is uneconomical; foreign countries generally use cyclones to perform cation exchange with organic resin after multiple classifications. with monovalent Na + , Li + or H + To replace the high-valent hydrated cation Ca in the interlayer 2+ , Mg 2+ 、Al 3+ , and then centrifugal sorting, and finally drying the finished product. The disadvantages are that the process is complicated, the equipment is various, and the cost is high.

Method used

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  • Production process of rectorite for nano composite material
  • Production process of rectorite for nano composite material
  • Production process of rectorite for nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the rectorite coarse concentrate is crushed through a jaw crusher, get 10kg rectorite coarse concentrate and add 130kg water, then add 0.4kg sodium pyrophosphate, place in a mixing tank and carry out linear speed of 10.51m / After 1 hour of high-speed stirring, the rectorite and the dispersant fully interacted to form a uniformly dispersed suspension A in water. The suspension A was placed in a centrifuge for high-speed centrifugation. The separation factor was 1375 and the separation time was 4.0. min, the tailings and purified rectorite suspension B can be obtained from the discharge, and then the suspension B is placed in the same centrifuge. Under the same separation factor, the separation time is extended to 10min, and the suspension The rectorite in the liquid B is all settled and dehydrated, and then the obtained rectorite is put into an oven, and dried at a temperature of 100°C until the water content is less than 10%, and the nanometer with a purity...

Embodiment 2

[0031]Example 2: Crushing the rectorite coarse concentrate, and then superfinely grinding to a particle size of more than 75% of the rectorite <15 μm, taking 10kg of ultrafine rectorite, adding it to 190kg of water, and then adding 0.5kg of hexametaphosphoric acid Sodium, placed in a mixing tank and stirred at a high speed of 10.51m / s for 1 hour, the rectorite and the dispersant fully interacted to form a uniformly dispersed suspension A in water, and the suspension A was placed in a centrifuge for High-speed centrifugation, the separation factor is 3244, and the separation time is 7 minutes. The tailings and the purified rectorite suspension B can be obtained from the discharge. The suspension B is placed in the same centrifuge, and then re- After separating for 10 minutes, all the rectorite in the suspension B can be settled and dehydrated, and then the obtained rectorite is placed in an oven and baked at 100°C until the water content is less than 10%. 98.5% rectorite for na...

Embodiment 3

[0036] Embodiment 3: the tailings obtained in Example 2 are placed in an oven, baked to a water content<10% at a temperature of 100° C., get 10 kg and add it to 190 kg of water, then add 0.2 kg of sodium hexametaphosphate, and then Perform the same operation as in Example 2 to obtain 91.7% rectorite for nanocomposite materials.

[0037] It can be seen from the above examples that the production method of the present invention is simple, the equipment is simplified, the time is short, safe and convenient, and the rectorite series products for the preparation of organic polymer nanocomposites with a purity of 91% to 98.5% are produced.

[0038] The purity of the rectorite used in the nanocomposite produced by the invention can reach 91%-98.5%, and the average particle size is 100-400nm. The specific surface area is 50~60m 2 / g, the total amount of cation exchange (CEC) is 40-50mmol / 100g, it is an excellent inorganic filler for polymer nanocomposites, suitable for the synthesis ...

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Abstract

The production process of rectorite for nano composite material is to eliminate impurity minerals in calcium-base rectorite material through surface treatment and weight selection process. Rectorite mineral is produced into rectorite for nano composite material through crushing, superfine milling, addition water to a liquid-to-solid ratio of 10-49, addition of dispersant, high speed stirring to form homogeneous rectorite suspension, centrifugally sorting, dewatering and drying. The rectorite product has average size of 100-400 nm, specific surface area 50-60 sq m / g, and cation exchange capacity 40-50 mmol each 100 g. The rectorite product is one kind of excellent filler for nano composite polymer material.

Description

Technical field: [0001] The invention relates to a method for producing rectorite used in nanocomposite materials, and belongs to the field of polymer compound compositions. Specifically, it adopts the surface treatment and gravity separation process to remove some impurity minerals associated with rectorite, so that the purity of rectorite can reach 91% to 98.5%, and the average particle size can reach 100 to 400nm. Rectorite in polymer / nanoclay composites. Background technique: [0002] With the development of nanoscience and technology, layered substances, especially layered silicate clay minerals, can be separated or exfoliated into nanoscale single sheets, and dispersed into polymers as an inorganic filler to form a new nanocomposite materials. For example, "a polybutylene terephthalate / layered silicate nanocomposite and its preparation method" applied by the Institute of Chemistry, Chinese Academy of Sciences in 1997, patent application number 97104194.6, which is us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/00
Inventor 梁景晖毛艳汪昌秀张世运陈济美赵连强漆正文胡泽锋
Owner 湖北名流累托石科技股份有限公司
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