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Method for adjusting and controlling oil absorption value of ultrafine aluminum hydroxide

A technology of ultra-fine aluminum hydroxide and oil absorption value, applied in the field of inorganic flame retardants

Active Publication Date: 2019-11-12
CHEM TECH ACAD OF SHANDONG PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at a series of problems existing in the oil absorption value control technology in the existing aluminum hydroxide preparation process, the present invention uses sodium metaaluminate, sulfuric acid, stearic acid, and aluminum sulfate as raw materials to synthesize ultrafine aluminum hydroxide. The combined effect of these process parameters achieves the purpose of precise regulation of the oil absorption value of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put 300.0g of sodium metaaluminate solution (1.00mol) into the reaction flask, heat up to 75°C, start stirring, and mix 257g of 40% concentrated sulfuric acid aqueous solution (1.02mol), 15g of stearic acid, and 2.5g of aluminum sulfate, After the temperature is reached, add dropwise into the reaction flask within 10 hours, continue to insulate for 2 hours, filter and separate the reaction solution, rinse the filter cake with 390 g of hot water, and dry the filter cake at 150° C. for 4 hours to obtain the product of the present invention, with an oil absorption value of 20.2%.

Embodiment 2

[0025] Put 300.0g of sodium metaaluminate solution (1.00mol) into the reaction flask, heat up to 75°C, start stirring, and mix 240.1g of 60% sulfuric acid aqueous solution (0.98mol), 1.5g of stearic acid, and 1.2g of aluminum sulfate Evenly, drop into the reaction bottle within 4 hours after the temperature is reached, continue to keep warm for 2 hours, filter and separate the reaction solution, rinse the filter cake with 390g hot water, dry the filter cake at 150°C for 4 hours to obtain the product of the present invention, and its oil absorption value is 80.5%.

Embodiment 3

[0027] Put 300.0g of sodium metaaluminate solution (1.00mol) into the reaction flask, heat up to 75°C, start stirring, and mix 247.5g of 40% sulfuric acid aqueous solution (1.01mol), 10g of stearic acid, and 3.0g of aluminum sulfate After the temperature reached, drop into the reaction flask within 8 hours, continue to insulate for 2 hours, filter and separate the reaction solution, rinse the filter cake with 390 g of hot water, and obtain the product of the present invention after the filter cake was dried at 150° C. for 4 hours, and its oil absorption value was 39.2%.

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Abstract

The invention discloses a method for adjusting and controlling an oil absorption value of ultrafine aluminum hydroxide. The method comprises the following steps: preparing aluminum hydroxide by usingsodium metaaluminate, sulfuric acid, stearic acid and aluminum sulfate as raw materials, adding a mixed solution of sulfuric acid, stearic acid and aluminum sulfate into a sodium metaaluminate solution so as to synthesize the ultrafine aluminum hydroxide, and adjusting the batching ratio of the stearic acid to the aluminum sulfate so as to realize adjustment and control of the oil absorption valueof a product. The oil absorption value of the aluminum hydroxide product prepared by using the method provided by the invention is controllable in a range of 20 to 80%, so the demands of various application fields are met.

Description

technical field [0001] The invention mainly relates to the field of inorganic flame retardants, and mainly relates to a method for regulating and controlling the oil absorption value of ultrafine aluminum hydroxide. Background technique [0002] Throughout the world's flame retardant market, halogen-based flame retardants dominated the flame retardant market in the past, but their demand continues to decline with environmental protection requirements, and they are replaced by halogen-free and low-toxicity flame retardants. As a typical representative of halogen-free flame retardants, aluminum hydroxide accounts for more than 80% of the global consumption of inorganic flame retardants. It has three functions of flame retardant, smoke elimination and filling, and does not produce secondary pollution during combustion. It can produce synergistic effect with various substances, and is non-volatile, non-toxic, less corrosive, and low in price. It is known as a pollution-free flam...

Claims

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Application Information

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IPC IPC(8): C01F7/34C01F7/36C01F7/14
CPCC01F7/36C01F7/34C01F7/141C01P2006/19
Inventor 翟云鸽刘启奎岳涛任倩王艳唐晓婵
Owner CHEM TECH ACAD OF SHANDONG PROVINCE