Silicon dioxide extraction process based on highland barley husks

A technology for silica and highland barley barley, which is applied in the direction of silica and silica, and can solve the problems of affecting the dissolution of silica, reducing the yield of silica, and large energy consumption.

Inactive Publication Date: 2019-12-27
崔建中
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention is: in the process of extracting silica from barley barley at present, the process of carbonizing first and then dissolving is adopted, which not only consumes a lot of energy during the carbonization process, but also easily causes damage to the internal amorphous silica. coating, which affects the subsequent dissolution of silica, resulting in the disadvantage of reducing the yield of silica, and provides a silica extraction process based on highland barley barley

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] After washing the highland barley bark with water for 3 times, drying it to a constant weight at a temperature of 55° C., pouring the dried highland barley bark into a pulverizer, passing through a 100-mesh sieve after crushing, to obtain highland barley bark powder; Powder and sulfuric acid solution with a mass fraction of 50% are mixed and poured into a hydrothermal kettle according to a mass ratio of 1:8, and then the hydrothermal kettle is sealed, at a temperature of 140°C, a pressure of 2.8MPa, and a stirring speed of 200r / min. After 6 hours of hydrothermal carbonization reaction, release the pressure to normal pressure within 30s, discharge the material, filter, and collect the filter cake, then wash the filter cake with deionized water until the washing liquid is neutral; then wash the filter cake After the cake was soaked in liquid nitrogen for 30 seconds, it was taken out, poured into a grinder, and kept at -20°C for 30 minutes of heat preservation and grinding,...

Embodiment 2

[0035]After washing the highland barley bark with water for 4 times, dry it to a constant weight at a temperature of 68° C., then pour the dried highland barley bark into a grinder, and pass through a 100-mesh sieve after crushing to obtain highland barley bark powder; Powder and sulfuric acid solution with a mass fraction of 55% are mixed and poured into a hydrothermal kettle according to a mass ratio of 1:15, and then the hydrothermal kettle is sealed, and the temperature is 160°C, the pressure is 3.2MPa, and the stirring speed is 500r / min. After the hydrothermal carbonization reaction for 7 hours, release the pressure to normal pressure within 40s, discharge the material, filter, and collect the filter cake, then wash the filter cake with deionized water until the washing liquid is neutral; then wash the filter cake After the cake was soaked in liquid nitrogen for 50 seconds, it was taken out, poured into a grinder, and kept at -20°C for 40 minutes of heat preservation and g...

Embodiment 3

[0043] After washing the highland barley bark with water for 5 times, drying it to a constant weight at a temperature of 80° C., pouring the dried highland barley bark into a grinder, passing through a 100-mesh sieve after crushing, to obtain highland barley bark powder; Powder and sulfuric acid solution with a mass fraction of 60% are mixed and poured into a hydrothermal kettle according to a mass ratio of 1:20, and then the hydrothermal kettle is sealed, and the temperature is 180°C, the pressure is 3.5MPa, and the stirring speed is 800r / min. After 8 hours of hydrothermal carbonization reaction, the pressure was released to normal pressure within 50 seconds, the material was discharged, filtered, and the filter cake was collected, and then the filter cake was washed with deionized water until the washing liquid was neutral; then the washed filter cake was After the cake was soaked in liquid nitrogen for 60 seconds, it was taken out, poured into a grinder, and kept at -20°C fo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
quality scoreaaaaaaaaaa
Login to view more

Abstract

The invention discloses a silicon dioxide extraction process based on highland barley husks, and belongs to the technical field of material recovery. During extraction, the process includes washing the highland barley husks with water, and drying and smashing the husks to obtain highland barley husk powder; carrying out hydrothermal carbonization reaction on the highland barley husk powder and a sulfuric acid solution, instantly releasing pressure, discharging, performing filtration, collecting a filter cake, and washing the filter cake with deionized water until a washing solution is neutral;freezing the washed filter cake with liquid nitrogen, grinding the filter cake, and unfreezing to obtain an unfrozen material; pouring the unfrozen material into a saturated ammonium nitrate solution, removing surface floaters, collecting lower-layer precipitates, and performing vacuum freeze drying on the lower-layer precipitates to obtain a refined material; putting the refined material into atubular furnace, slowly heating in an oxygen atmosphere, calcining the material, cooling and discharging to obtain a calcined material; and repeatedly washing the obtained calcined material with water, and carrying out vacuum freeze drying to obtain refined silicon dioxide, thereby completing the silicon dioxide extraction process of the highland barley husks. The silicon dioxide extraction rate is high, and the product has high purity.

Description

technical field [0001] The invention discloses a silicon dioxide refining process based on highland barley barley, and belongs to the technical field of material recovery. Background technique [0002] Highland barley is one of the most important food crops in the world. As the main by-product of highland barley processing, highland barley bark can account for about 20% of the quality of highland barley itself. Compared with traditional non-renewable resources, it has great advantages of low cost and abundant output. High-temperature barley barley produces ash after high-temperature incineration, which is rich in amorphous silica and porous carbon components. It is a renewable and clean biomass energy material with abundant yields. [0003] The silicon dioxide in the highland barley barley is an amorphous amorphous silicon dioxide, which can be dissolved by heating at high temperature under normal pressure. Therefore, the highland barley barley is a good biomass silicon so...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
CPCC01B33/12C01P2006/80
Inventor 崔建中
Owner 崔建中
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap