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Method for preparing magnesium hydrate fire retardant through surface modification treatment by using composite wet method

A magnesium hydroxide and surface modification technology, which is applied in magnesium hydroxide, dyeing low molecular organic compound treatment, fibrous fillers, etc., can solve the problems of large equipment investment and high energy consumption in the process, and achieve low cost and good dispersion , the effect of great market potential

Inactive Publication Date: 2014-05-28
许营春
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Israel Dead Sea Bromide Group uses high-concentration magnesium chloride as raw material to prepare magnesium hydroxide flame retardant by high-temperature cracking-hydration process. It has built a production plant with an annual output of 10,000 tons. Good performance, the process is characterized by continuous and large-scale production, but the disadvantages are large investment in equipment, high energy consumption in the process, and a large amount of hydrochloric acid by-product also needs to find a way out

Method used

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  • Method for preparing magnesium hydrate fire retardant through surface modification treatment by using composite wet method
  • Method for preparing magnesium hydrate fire retardant through surface modification treatment by using composite wet method
  • Method for preparing magnesium hydrate fire retardant through surface modification treatment by using composite wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take a certain amount of magnesium chloride hydrate and dissolve it in distilled water, the concentration of the substance is controlled at 1.0mol / L, take a certain amount of sodium hydroxide and dissolve it in distilled water, the concentration of the substance is controlled at 1.0mol / L, and stir it vigorously Under the action of the alkali solution, the alkali solution is added to the magnesium chloride solution, the pH value is controlled at 10.0, and the magnesium hydroxide precipitate is obtained. The slurry is heated to 60°C and kept for 60min to obtain a mature slurry, and the slurry is continued to be heated to 75°C. Coating modification treatment. At the same time, weigh 3.5% (relative to dry basis magnesium hydroxide, the same below) fatty acid and 10% sodium hydroxide (relative to the amount of fatty acid, the same below), and saponify at 80°C for 10 minutes to form a 5% saponified solution , while adding 1.5% hyperdispersant (based on dry magnesium hydroxide...

Embodiment 2

[0047] Take a certain amount of magnesium chloride hydrate and dissolve it in distilled water, the concentration of the substance is controlled at 1.0mol / L, take a certain amount of sodium hydroxide and dissolve it in distilled water, the concentration of the substance is controlled at 1.0mol / L, and stir it vigorously Under the action of the alkali solution, the alkali solution is added to the magnesium chloride solution, the pH value is controlled at 10.0, and the magnesium hydroxide precipitate is obtained. The slurry is heated to 60°C and kept for 60min to obtain a mature slurry, and the slurry is continued to be heated to 75°C. Coating modification treatment. At the same time, weigh 3.5% fatty acid and 10% sodium hydroxide, and saponify at 80°C for 10 minutes to form a 5% saponified liquid, and add 2.5% hyperdispersant at the same time. Add the prepared saponification solution into the slurry, and stir for modification for 60 minutes. Then filter, wash, dry, pulverize and...

Embodiment 3

[0049] Take a certain amount of magnesium chloride hydrate and dissolve it in distilled water. The concentration of the substance is controlled at 2.0mol / L. Take a certain amount of sodium hydroxide and dissolve it in distilled water. The concentration of the substance is controlled at 2.0mol / L. Under the action of the alkali solution, the alkali solution is added to the magnesium chloride solution, the pH value is controlled at 10.5, and the magnesium hydroxide precipitate is obtained. The slurry is heated to 60°C and kept for 60min to obtain a mature slurry, and the slurry is continued to be heated to 80°C. Coating modification treatment. At the same time, 4.0% fatty acid and 15% sodium hydroxide were weighed, and saponified at 80°C for 10 minutes to form a 10% saponified liquid, and 2.0% hyperdispersant was added at the same time. Add the prepared saponification solution into the slurry, and stir for modification for 60 minutes. Then filter, wash, dry, pulverize and classi...

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Abstract

The invention discloses a method for preparing magnesium hydrate fire retardant through surface modification treatment by using a composite wet method. The method comprises the following steps: firstly, mixing a water solution of a soluble magnesium salt with an alkali water solution according to a chemical stoichiometric ratio so as to obtain a magnesium hydrate precipitate sizing agent, aging or performing hydro-thermal treatment on the obtained magnesium hydrate precipitate sizing agent, controlling the temperature to be 40-180 DEG C, subsequently performing hyperdispersant and fatty acid (or sodium / or sylvite) compounding wet method surface wrapping modification treatment on magnesium hydrate, and finally dehydrating, drying, crushing and grading the wrapped sizing agent. The powder modified by using the method is good in processing property, excellent and remarkable inflaming retarding and smoke inhibition function, and is applicable to situation of different demands. The method is reasonable in process, low in cost, wide in product application field, large in market potential, high in competitiveness and has remarkable economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of preparation of magnesium hydroxide flame retardant by wet method surface modification, and in particular relates to a compound wet method surface coating modification of hyperdispersant and fatty acid (or sodium / or potassium salt) to prepare dispersible Good magnesium hydroxide flame retardant method. Background technique [0002] With the continuous expansion of the application field of polymer materials, flame retardant technology has increasingly attracted people's attention. At present, there are many kinds of flame retardants in practical application, mainly halogen-based, organophosphorus-based, phosphorus-nitrogen-based, organic-silicon-based and inorganic aluminum-based, magnesium-based, antimony-based, molybdenum-based, etc. Since 80% of fires are suffocated by smoke, "smoke suppression" is more important than "flame retardant" in contemporary flame retardant technology. The development directi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C01F5/22C08K3/22C08K9/04
Inventor 许营春
Owner 许营春
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