Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing high-quality diatomite by oscillation-based hydrochloric acid process

A technology of diatomite and hydrochloric acid method, applied in the direction of silicon oxide, silicon dioxide, etc., can solve the harsh process environment of atmospheric pressure boiling acid washing method, the corrosion and damage of diatomite structure, and restrict the quality, quality and application of diatomite. Scope and other issues, to achieve the effect of improving the quality and use of chemical activity

Inactive Publication Date: 2015-01-28
桂林新竹大自然生物材料有限公司 +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of harmful impurity elements (such as iron, manganese, etc.) in diatomite restricts the quality, quality and application range of diatomite. At present, the more feasible methods for refining low-quality diatomite include alkali calcination and atmospheric pressure. Boiling pickling method, but the iron content after treatment is still high, the alkali method has a dissolution and damage effect on the structure of diatomite, and the process environment of the normal pressure boiling acid washing method is harsh, and the structure also has mechanical collision damage

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high-quality diatomite by oscillation-based hydrochloric acid process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. First, crush and disperse the diatomite concentrate obtained through preliminary purification to a particle size of 50-100 μm.

[0028] 2. Then mix the pulverized diatomite powder with hydrochloric acid with a mass concentration of 20%;

[0029] The amount of HCl is 5 times that of Σ(x×n).

[0030] 3. Then place it in a closed acid-resistant and pressure-resistant invertible reactor, and react during the inverting process. The reaction temperature is 80° C., and the reaction time is 36 hours.

[0031] 4. After the reaction is finished, take the reactant out of the reactor after cooling, filter out the liquid, and ultrasonically wash with hot water at 80°C until the pH of diatomaceous earth plus pure water shows neutrality, and then dry at 300°C for 5 hours.

[0032] 5. Calcinate the dried product for 1 hour in an oxidizing environment. The calcination temperature is controlled at 500°C. It is required to oxidize sufficiently to remove organic matter, carbon, and dia...

Embodiment 2

[0035] 1. First, crush and disperse the diatomite concentrate obtained through preliminary purification to a particle size of 25-50 μm;

[0036] 2. Then mix the pulverized diatomite powder with hydrochloric acid with a mass concentration of 36%;

[0037] The amount of HCl is 4 times that of Σ(x×n).

[0038] 3. Then place it in a closed acid-resistant and pressure-resistant reversible reactor, and react during the reversing process. The reaction temperature is 100° C., and the reaction time is 24 hours.

[0039] 4. After the reaction is completed, take the reactant out of the reactor after cooling, filter out the liquid, and ultrasonically wash with hot water at 80°C until the pH of diatomaceous earth plus pure water shows neutrality, and then dry at 250°C for 3 hours.

[0040] 5. Calcinate the dried product for 1 hour in an oxidizing environment. The calcination temperature is controlled at 750°C. The oxidation is required to be sufficient to remove the organic matter, carbon...

Embodiment 3

[0043] 1. First, crush and disperse the diatomite concentrate obtained through preliminary purification to a particle size of 10-25 μm.

[0044] 2. Then mix the pulverized diatomite powder with hydrochloric acid with a mass concentration of 25%;

[0045] The amount of HCl is 2 times of Σ(x×n).

[0046] 3. Then place it in a closed acid-resistant and pressure-resistant reversible reactor, and react during the reversing process. The reaction temperature is 60° C. and the reaction time is 12 hours.

[0047] 4. After the reaction is over, take the reactant out of the reactor after cooling, filter out the liquid, and wash it ultrasonically with hot water at 80°C until the pH of diatomite plus pure water shows neutrality, and then dry it at 150°C for 2 hours.

[0048] 5. Calcinate the dried product for 1 hour in an oxidizing environment. The calcination temperature is controlled at 800°C. It is required to oxidize sufficiently to remove the organic matter, carbon, and diatom skelet...

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
Specific surfaceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing high-quality diatomite by an oscillation-based hydrochloric acid process. According to the method, diatomite concentrate obtained by preliminary purification is taken as a raw material, heating reaction is performed with HCl under oscillation, filtration is performed to filter out sigma x TCln soluble matters, hydrochloric acid and the like, and washing, drying and calcination are performed to remove organic impurities, carbon and water in micropores of diatomite so as to obtain high-purity diatomite. According to the method provided by the invention, perfect biological porous active structure properties of amorphous SiO2 of diatomite are retained, diatomite after treatment has the advantages of high activity, high whiteness and low iron content, the whiteness can achieve 88-96, the content of SiO2 in diatomite is more than 98%, the iron content is lower than 0.4%, the specific surface is more than 20m<2> / g, and the quality and using properties of a product are greatly improved.

Description

technical field [0001] The invention relates to mineral purification, in particular to the refining of diatomite, in particular to a method for preparing high-quality diatomite based on a shaking hydrochloric acid method. Background technique [0002] Diatomaceous earth is an amorphous biomineralized siliceous mineral. The main chemical composition is amorphous silica, and the impurity composition mainly includes colloidal Al 2 o 3 , Fe 2 o 3 , MnO, CaO, MgO, K 2 O, Na 2 O.P 2 o 5 And organic matter and bone water. Usually white, off-white, light gray, light yellow and dark gray, light and porous. With the depletion of resources, there are fewer and fewer high-quality diatomites, and low-quality diatomites are modified and activated to reach the quality of high-quality diatomites, which is a hot field for the development of low-quality diatomites. [0003] The pore volume of diatom raw soil is generally 0.45 ~ 0.98cm 3 / g. It is precisely because the diatom shell...

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
IPC IPC(8): C01B33/12
Inventor 王平匡猛韦仲华韦宇洪刘斌李呈权谢亮
Owner 桂林新竹大自然生物材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com