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Hydrophobic expanded pearlite for low temperature and its preparing method

A technology for expanding perlite and perlite, which is applied in the field of hydrophobic expanded perlite for low temperature and its preparation, and can solve the problems of increasing factory cost and affecting production, etc.

Inactive Publication Date: 2005-02-16
上海松亨环保材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At a certain time, it is necessary to periodically stop production, heat and dry or replace the dried expanded perlite, which will not only affect the production, but also increase the cost of the factory

Method used

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  • Hydrophobic expanded pearlite for low temperature and its preparing method
  • Hydrophobic expanded pearlite for low temperature and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, water-repellent agent: water=1: 5 (weight ratio) shape water-repellent agent solution, water-repellent agent solution: expanded perlite=1: 1 (weight ratio), mix and stir, dry and dehydrate to constant weight, Get expanded perlite, its water-repellent requirements can meet the technical indicators of French GTT company's water-repellent expanded perlite used in tank ships. Silicone oil is used as water repellent here.

Embodiment 2

[0032] Embodiment 2, water-repellent agent: water=1: 7 (weight ratio) forms water-repellent agent solution, water-repellent agent solution: expanded perlite=1.2: 1 (weight ratio), mix and stir, dry and dehydrate to reach constant weight, The water-repellent expanded perlite is obtained, and its water-repellent index can exceed the water-repellent technical index proposed by the French GTT company. Here, the water-repellent agent adopts silicone oil, or is an organic fat material.

Embodiment 3

[0033] Embodiment 3, water-repellent agent: water=1: 15 (weight ratio), form water-repellent agent solution, water-repellent agent solution: expanded perlite=1.4: 1 (weight ratio), mix and stir, dry and dehydrate to reach constant weight , to obtain hydrophobic expanded perlite, which has good hydrophobic performance and can be suitable for the needs of air separation equipment in the oxygen generator industry. Here, the water-repellent agent is silicone oil or an organic fat material.

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Abstract

The invention relates to an approach to produce hydrophobic expanded perlite that can be obtained by spreading water-repellent on surface of expanded perlite to form hydrophobic protective membrane. It will get a better effect that using organic fats matters or oil matters, esp., silicone oil as water-repellent. The invention remarkably reduces dosage of water-repellent with adding water to dilute water-repellent and then blending and stirring with expanded perlite. It can reduce technics flow, low production cost and ensure production quality that adopting continuous product and completing spray and dry in one time. The invention can be widely used as thermal insulation in oxygen-making industry, low temperature, insulation equipment and other fields.

Description

technical field [0001] The invention belongs to the technical field of low-temperature thermal insulation materials, and in particular relates to a hydrophobic expanded perlite for low temperature and a preparation method thereof. Background technique [0002] The blazing molten matter erupted from a volcano, the product of cooling and condensation can be called lava, but also because the surface of the magma ejected cools so quickly that the atoms or ions in it have no time to combine to form regular crystalline substances, which solidify to form natural lava. The glassy substance, this naturally formed glassy rock, when its chemical composition is SiO 2 Content > 65%, known as acidic glassy lava. Such as perlite, loose rock, obsidian, collectively referred to as perlite. [0003] Perlite is called expanded perlite after crushing, grading, preheating, high-temperature instantaneous melting and volume expansion of 10-25 times. Expanded perlite has a porous structure, l...

Claims

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Application Information

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IPC IPC(8): C04B20/10
Inventor 陶吉林徐亚宏许国耀付春红黄海明
Owner 上海松亨环保材料有限公司
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