Porous silica gel air purifying particles and preparation method thereof

An air purification and porous silica gel technology, which is applied in the field of porous silica gel air purification particles and their preparation, can solve problems such as air pollution control in seldom residential environments, and achieve the effects of developed pores, mature technology and high purity

Active Publication Date: 2015-01-07
福建省宇诚环保科技有限公司
View PDF8 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica gel is mainly made of alkali metal silicate or organic silicon source, and is prepared by gel method, such as the preparation process of Chinese patent high-purity silica gel (CN 102079526), ​​a porous silica ba

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
  • Porous silica gel air purifying particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] The present invention is a preparation method of porous silica gel air purification particles, including the following steps:

[0030] 1. Add the bottom liquid and surfactant to the reactor 5 in advance, keep stirring and control the temperature to 25-80 o C; After heating, pour water glass solution and sulfuric acid solution into the reactor 5 at the same time, and control the pH value in the reactor 5 to 4-10. Said surfactant is selected from one or more of polyethylene glycol, ammonium bicarbonate, polyethylene glycol stearate, amine alkyl sulfonate, and polyoxyethylene castor oil; by mass percentage The surfactant is 0.01-5% of the water glass solution. The mass concentration of the water glass solution is 5-25%, and the modulus is 3.0-3.4; the mass concentration of the sulfuric acid solution is 15-50%.

[0031] 2. After the silica gel is formed, continue to react for 20-40 minutes, and then increase the temperature to 90-100 o C. Adjust the pH to 2-9 and age for 1-5 ho...

Example Embodiment

[0036] Example 1

[0037] Add 1000kg deionized water to the reactor 5 with agitator, and add 1kgPEG6000 and 4kgNaHCO at the same time 3， Control temperature is 50 o C. Under continuous stirring, use a peristaltic pump to drive 700kg of 15% water glass solution into the reactor 5, and at the same time drive 30% sulfuric acid to control the pH of the reaction solution to about 8, and the feeding time is about 40 minutes . After the gel is formed, continue the reaction for 20 minutes, then adjust the pH of the reaction slurry to 4, and heat to 90 o C aging for 2 hours, after aging, continue to add 10% water glass solution until the pH of the reaction slurry is 7. Finally, filtration is performed for solid-liquid separation, and the filter cake is washed with deionized water, and the conductivity of the filtrate is less than 0.4 μs / cm, dried and crushed to obtain a finished product.

Example Embodiment

[0038] Example 2

[0039] Add 900kg of deionized water to the reactor 5 with agitator, and add 1kgPEG6000 and 4kgNaHCO at the same time 3， Control temperature is 50 o C. Use a peristaltic pump to drive 800 kg of a 12% concentration of water glass solution into the reactor 5 under constant stirring, and at the same time drive a 25% concentration of sulfuric acid to control the pH of the reaction solution to around 9, and the feeding time is about 40 minutes . After the gel is formed, continue the reaction for 20 minutes, then adjust the pH of the reaction slurry to 5, and heat to 90 o C aging for 3 hours, after the aging, continue to add 12% water glass solution until the pH of the reaction slurry is 6.5. Finally, filtration is performed for solid-liquid separation, and the filter cake is washed with deionized water, and the conductivity of the filtrate is less than 0.4 μs / cm, dried and crushed to obtain a finished product.

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 surface areaaaaaaaaaaa
Pore volumeaaaaaaaaaa
Average pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses porous silica gel air purifying particles and a preparation method thereof. The porous silica gel air purifying particles have the specific surface areas of 250-500m<2>/g, the pore volumes of 1.2-2.0mL/g, the average pore size of 5-50nm and the average particle size of 10-100mu m, have the characteristics of being large in specific surface areas, developed in pores, high in adsorption capacity and the like, can be used for absorbing gases such as formaldehyde, ammonia, total volatile organic compound (TVOC) and the like, and can be used for purifying the air and removing harmful gas. The surface of silica gel has free hydroxide radical, so that the porous silica gel air purifying particles are very high in adsorption capacity for polar materials such as formaldehyde, and the removal rate of formaldehyde reaches up to more than 85%. Furthermore, the silica gel silicon dioxide is high in purity, non-toxic and harmless, and does not contain any heavy metal, thus being an environment-friendly air purification product. The preparation method is mature in technology and easy in realization of industrial production.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, and in particular relates to a porous silica gel air purification particle and a preparation method thereof. Background technique [0002] Silica gel is a kind of highly active adsorption material, which belongs to the amorphous substance, and its main component is silicon dioxide, the chemical formula is SiO 2 ·nH 2 O. Silica has the characteristics of large specific surface area, high porosity, and high purity. It is widely used in coatings, papermaking, petrochemicals, daily chemicals, plastics, pesticides, and many other fields. It is one of the most popular chemical products. Silica gel as an adsorbent, due to its high adsorption activity, can selectively adsorb harmful gases such as formaldehyde and ammonia, or absorb moisture in the air as a desiccant, and can also be used for adsorption and separation of substances, as a catalyst carrier wait. At present, th...

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): B01J20/10B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2253/106B01D2253/304B01D2253/306B01D2253/308B01D2253/311B01J20/103B01J20/28016B01J20/28054B01J20/28061B01J20/28076B01J20/28083
Inventor 庄艺伟刘主良刘群鹏柯江洋刘志辉刘群鸿
Owner 福建省宇诚环保科技有限公司
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