Preparation method of modified nanometer precipitated barium sulfate

A technology for precipitating barium sulfate and nano-precipitation, which is applied in chemical instruments and methods, fibrous fillers, dyed low-molecular organic compound treatment, etc., to achieve the effects of improving mechanical properties, simple process, and widening the scope of use

Inactive Publication Date: 2011-01-19
FOSHAN ONMILLION NANO MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no technical solution to successfully apply barium sulfate to the manufacture of chemical fibers and films.

Method used

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  • Preparation method of modified nanometer precipitated barium sulfate
  • Preparation method of modified nanometer precipitated barium sulfate
  • Preparation method of modified nanometer precipitated barium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 600kg industrial grade light barium carbonate and 3400kg water in 5 cubic reactors, solid content is 15%. Add 25kg hydrochloric acid (concentration 31%) in the reactor. The stirring speed of the reactor was controlled at 200r / min, and then 300kg of concentrated sulfuric acid (concentration 98%) was added at a constant speed within 30-40 minutes until the reaction was completed. The pH at the end of the reaction was controlled at 5.5. After the barium sulfate slurry that reacted is filtered with 1000 order filter screens with strainer, obtain 720Kg precipitated barium sulfate. In precipitated barium sulfate, add the aqueous solution of sodium stearate weight content 10% at a uniform speed to precipitated barium sulfate and carry out surface treatment, adding time is 30 minutes, and sodium stearate weight is 20kg, and the temperature during modification is controlled at 80 ℃, then The modified nano-precipitated barium sulfate powder is obtained by dehydrating with a...

Embodiment 2

[0061] Add 1000kg of industrial-grade light barium carbonate to a 5 cubic reactor, add 3000kg of water, add 25kg of hydrochloric acid (concentration 31%), control the stirring speed of the reactor at 250r / min, and then add 500kg of concentrated barium carbonate at a constant speed within 30-40 minutes. Sulfuric acid (concentration 98%) until the reaction is complete. The pH at the end of the reaction was controlled at 5.6. After filtering the reacted barium sulfate slurry with a 1000 mesh filter screen with a filter screen, 1200Kg of precipitated barium sulfate is obtained. In precipitated barium sulfate, add the aqueous solution of sodium stearate weight content 5% at a constant speed to precipitated barium sulfate and carry out surface treatment, adding time is 20 minutes, and sodium stearate weight is 30kg, and the temperature during modification is controlled at 80 ℃, then The modified nano-precipitated barium sulfate powder is obtained by dehydrating with a filter press,...

Embodiment 3

[0066] Add 200kg industrial-grade light barium carbonate and 3800kg water in a 5 cubic reaction kettle, and the solid content is 5%. Add 20kg of sodium chloride in the reactor. The stirring speed of the reactor was controlled at 100r / min, and then 100kg of concentrated sulfuric acid (concentration 98%) was added at a constant speed within 50 minutes until the reaction was completed. The pH at the end of the reaction was controlled at 6. After the barium sulfate slurry that reacted is filtered with 1000 order filter screens with strainer, obtain 240Kg precipitated barium sulfate. Add 10kg of vinyltrichlorosilane modifier to the precipitated barium sulfate at a uniform speed for surface treatment. The addition time is controlled at 40 minutes, and the temperature during modification is controlled at 55°C. Then dehydrate with a filter press and use a flash dryer Drying, automatic packaging machine packaging into modified nano-precipitated barium sulfate powder. The particle si...

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Abstract

The invention provides a preparation method of modified nanometer precipitated barium sulfate. The modified nanometer precipitated barium sulfate is prepared by modifying precipitated barium sulfate by using a modifier which is selected from one or several of silicate, aluminate, phosphate, polyethylene glycol, polyvinyl alcohol, stearate, laurate, silane coupling agent, titanate coupling agent and aluminate coupling agent. The modified nanometer precipitated barium sulfate prepared by the method of the invention has even particle size distribution. The technology of manufacturing chemical fiber by using the modified nanometer precipitated barium sulfate is simple, the technical index is rational and reliable, and the operation is easy; moreover, the mechanical properties, such as tensile strength, impact strength and breaking elongation of the polyethylene material, are greatly improved. The application of the modified nanometer precipitated barium sulfate can greatly reduce the product cost of the polyethylene fiber and further increase the popularization and application range of the polyethylene fiber.

Description

technical field [0001] The invention relates to a preparation method of modified nano-precipitated barium sulfate. Background technique [0002] In the prior art, as a cost-advantageous material, barium sulfate has gradually expanded its application range, but there is no technical solution for successfully applying barium sulfate to the manufacture of chemical fibers. The main factors affecting its application are the characteristics of high surface tension and easy agglomeration of nanomaterials. In specific applications, it is easy to cause disadvantages such as uneven distribution. [0003] Polyethylene chemical fibers are widely used in various industries, especially in fishing nets, ropes and other industries. However, there is a certain gap between the mechanical properties of polyethylene itself and nylon, which cannot meet some high-strength applications, resulting in limitations in its application and promotion. [0004] The various aspects performances of polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/06C09C3/10C09C3/08C09C3/12C08L51/06C08K9/02C08K9/04C08K9/06C08K3/30D01F1/10
Inventor 陈焰方利浮郑明东
Owner FOSHAN ONMILLION NANO MATERIALS
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