Aerogel and flame retardant prepared from boron mud waste and modification application of aerogel

A technology of airgel and flame retardant, which is applied in the field of airgel preparation from boron mud waste, flame retardant and its modification application field, which can solve the problems of energy consumption and pollution

Active Publication Date: 2021-03-30
SHENYANG FIRE RES INST OF MEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of magnesium hydroxide requires the mining of valuable magnesium ore resources, resulting in huge energy consumption and pollution

Method used

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  • Aerogel and flame retardant prepared from boron mud waste and modification application of aerogel
  • Aerogel and flame retardant prepared from boron mud waste and modification application of aerogel
  • Aerogel and flame retardant prepared from boron mud waste and modification application of aerogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] In the present embodiment, boron mud comprises components and mass percent content is MgO 41.96%, SiO 2 28.53%, Fe 2 o 3 20.12%, Al 2 o 3 3.58%, CaO 2.75%, other 3.06%.

[0107] (1) First grind the boron mud into powder, sieve through a 200-mesh standard molecular sieve, configure mixed acid (mass ratio): 20% phosphoric acid, 80% nitric acid, dilute the mixed acid by 3 times, and sieve according to the solid-liquid mass ratio Boron mud powder: diluted mixed acid = 1:4, mechanically stirred, heated at 80°C, treated for 2 hours, then filtered with suction, and the filtrate - crude magnesium sulfate solution was collected for the preparation of nano-magnesium hydroxide flame retardant. The filter cake was washed with distilled water to neutrality, then washed with ethanol for 3 times, and dried in a drying oven at 60°C for 24 hours to obtain the demagnesium and boron sludge;

[0108] (2) Take 60g of demagnesium iron and boron mud, add it to a 500ml round bottom flas...

Embodiment 2

[0121] In the present embodiment, boron mud comprises components and mass percent content is MgO 43.77%, SiO 2 33.21%, Fe 2 o 3 18.12%, Al2O3 3.21%, CaO 1.31%, other 0.38%.

[0122] (1) First, the boron mud is ground into powder, and after being sieved through a 200-mesh standard molecular sieve, a mixed acid (mass ratio): 10% of sulfuric acid, 20% of phosphoric acid, 70% of nitric acid is diluted 3 times with the mixed acid, according to the solid-liquid quality Ratio, boron mud powder after sieving: mixed acid after dilution = 1:5, mechanically stirred, heated at 60°C, treated for 5h, then suction filtered, and the filtrate-crude magnesium sulfate solution was collected for the preparation of nano-magnesium hydroxide flame retardant . The filter cake was washed with distilled water until neutral, then washed with ethanol three times, and dried in a drying oven at 60°C for 24 hours;

[0123] (2) Take 60g of demagnesium iron and boron mud, add it to a 500ml round bottom f...

Embodiment 3

[0136] In the present embodiment, boron mud comprises components and mass percent content is MgO 40.23%, SiO 2 35.82%, Fe 2 o 3 17.26%, Al 2 o 3 3.68%, CaO 1.78%, other 1.23%.

[0137] (1) First grind the boron mud into powder, sieve through a 200-mesh standard molecular sieve, configure mixed acid (mass ratio): 20% sulfuric acid, 30% phosphoric acid, 50% nitric acid, dilute the mixed acid by 3 times, according to the solid-liquid quality Ratio, boron mud powder after sieving: mixed acid after dilution = 1:6, mechanically stirred, heated at 70°C, treated for 4 hours, then suction filtered, and the filtrate - crude magnesium sulfate solution was collected for the preparation of magnesium flame retardant. The filter cake was washed with distilled water until neutral, then washed with ethanol three times, and dried in a drying oven at 60°C for 24 hours;

[0138] (2) Take 60g of demagnesium iron and boron mud, add it to a 500ml round bottom flask, add 2M NaOH, the solid-to-...

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Abstract

The invention discloses aerogel and a flame retardant prepared from boron mud waste and a modification application of the aerogel, and belongs to the technical field of solid waste utilization and public safety. By improving the treatment process of the boron mud waste, silicon, magnesium, aluminum, iron and other elements in the boron mud are separated to prepare the magnesium hydroxide flame retardant from the magnesium element, and the silicon element is used for preparing the SiO2 aerogel, thereby implementing high-efficiency comprehensive utilization of the boron mud waste. When the aerogel is modified, a polymer simultaneously containing a silicon hydrogen / silanol group and a functional group is used for participating in gelatinization to prepare functional modified gel, the functional modified gel is applied to heavy metal ion sewage adsorption treatment, Hg<2+> is taken as a reference, the adsorption capacity reaches 331.2 mg / g, the heavy metal ions are greatly improved, and the aerogel has good durability and can be recycled for five times, and the adsorption capacity can still reach 90% or above of the adsorption capacity for the first time.

Description

Technical field: [0001] The invention belongs to the technical field of solid waste utilization and public safety, and in particular relates to airgel prepared from boron mud waste, a flame retardant and the modification application of the airgel. Background technique: [0002] Solid waste is waste in the form of solid or semi-solid produced by human beings in production and living activities, among which industrial solid waste is an important category. The construction of ecological civilization needs to make efforts from the perspectives of building a new type of clean industry and efficiently treating and comprehensively utilizing industrial pollutants. Naturally, the treatment of industrial solid waste is the top priority. [0003] Boron mud, also known as boron-magnesium slag, is made of boron-magnesium ore (2MgO·B 2 o 3 ·H 2 O) The solid waste discharged during the production of borax. Boron mud contains a large amount of silicon and magnesium elements, which are ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/04C08K3/22C08G83/00B01J13/00B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/22
CPCC08K3/22C08G83/001B01J13/0091B01J20/103B01J20/28047B01J20/264C02F1/285C02F1/281C08K9/04C02F2101/20C02F2101/22C08K2003/2224C08L2201/02C08L23/12Y02W30/91
Inventor 王柏胡建设张桐鲁余任
Owner SHENYANG FIRE RES INST OF MEM
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