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

A method for large-scale continuous preparation of nanometer zero-valent metal materials

A nano-zero-valent, metal material technology, applied in nanotechnology and other directions, can solve problems such as easy oxidation by air, rising raw material costs, secondary iron pollution, etc., to improve dispersibility and reduction activity, optimize reduction reaction conditions, improve The effect of utilization efficiency

Active Publication Date: 2021-03-30
北京科大科技园有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This study provides a good prototype design for the large-scale preparation of nano-zero-valent iron, but there are also outstanding problems, such as the direct use of soluble iron salts, and its aqueous solution is often strongly acidic due to the hydrolysis of ferric iron. This has brought great trouble for the effective utilization of strong alkaline reducing agents such as sodium borohydride, and if the pH value of the iron ion solution is increased, as long as the pH is greater than 2, the ferric ion may be precipitated immediately. This is not conducive to being quickly, uniformly and fully reduced to nano-sized zero-valent iron
Such a reduction reaction, because the contact reaction time between the reagents is very short, the utilization efficiency of the reducing agent is not high, and the content and purity of the metallic iron component are not necessarily high, thus affecting the activity and use efficiency of the reduced iron powder
[0004] All in all, during the preparation and production process of traditional nano-zero-valent iron, several problems such as: agglomeration problem, rapid and uniform mixing reaction problem, difficult problem of solid-liquid separation and washing, easy oxidation by air, etc., are given to nano-zero-valent iron. The engineering scale-up preparation of iron and other nano-zero-valent metal powders has brought great challenges and restrictive technical bottlenecks
Although ordinary atomized iron powder or carbonyl iron powder can be used to replace part of nano-zero-valent iron to achieve the same effect, but because the particle size of these iron powders is mostly in the micron or even tens of micron levels, their reactivity is lower than that of nano-zero-valent iron. If the price of iron is several times lower, the amount of iron powder used will increase greatly, causing the cost of raw materials to rise, and may cause serious secondary iron pollution

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
  • A method for large-scale continuous preparation of nanometer zero-valent metal materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Weighten garlic waste, broken, and sieve through 40 mesh, thrown into water, soaking 24 hours; collecting garlic waste particles floating on the water surface, mixing magnesium hydroxide and sodium hydroxide mixing solution to adjust its pH The value is at 13. After the mixing is stirred for 12 hours, the particulate matter therein is collected;

[0036]The 0.01 M concentration of iron ion solution 50 liters, the initial pH is 2.5, and the first step is placed in the previous step to prepare a garlic waste particulate matter (adsorbent), and after stirring for 30 minutes, the adsorbent is filtered, After washing 3 times, add water 100 to the uniform slurry;

[0037]The 0.1M concentration of sodium sodium sodium sodium sodium sodium sodium sodium sodium hydrogenide was prepared, and the garlic waste particles slurry with the above adsorption of the iron ions were pumped into the reactor of 500 liters of the reaction pump, respectively. Among them, the interval spacer is mixed, expose...

Embodiment 2

[0039]Weighten garlic waste, broken, and sieve passed 80 mesh, thrown into water, infiltrate 12 hours; collect the garlic waste particles floating on the water surface, add calcium hydroxide and sodium hydroxide mixed solution to adjust its pH The value is at 11. After the mixing is stirred for 24 hours, the particulate matter is collected;

[0040]The 0.02 M concentration of iron ion solution is 100 liters, and the initial pH is 2.5, and the garlic waste particulate (adsorbent) 10 kg (dry base) is placed in the previous step, and the adsorbent is filtered after 30 minutes. After washing 3 times, the water is added to the water 500 to adjust the uniform slurry;

[0041]The 0.2 M concentration of sodium sodium sodium sodium sodium sodium sodium sodium sodium hydrogenide solution was prepared, and the garlic waste particles slurry with the iron ions were loaded into the reactor of 500 liters of reactors with the infusion pump, respectively. Among them, the interval spacer is mixed, exposed ...

Embodiment 3

[0043]Weighten garlic waste, broken, and sieve passed 80 mesh, thrown into water, infiltrate 12 hours; collect the garlic waste particles floating on the water surface, add calcium hydroxide and sodium hydroxide mixed solution to adjust its pH The value is at 11. After the mixing is stirred for 24 hours, the particulate matter is collected;

[0044]The 0.05m concentration of the nickel chloride solution is 200 liters, the initial pH is 6.5, and the garlic waste particulate (adsorbent) is added to the previous step, and the adsorbent is filtered, and the adsorbent is filtered, used for 30 minutes. After washing 3 times, add water 100 to the uniform slurry;

[0045]The 0.05m concentration of sodium sodium sodium sodium sodium hydrogenide solution is prepared, and the garlic waste particles slurry loaded with the iron ions with the above adsorption, and the total space of the reaction pump is 500 liters of the reactor in the reactor of 500 liters. Among them, the interval spacer is mixed, ex...

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
porosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to preparation of nanometer materials and specifically discloses a method for large-scale continuous preparation of nanometer zero-valent metal materials. The method includes thefollowing steps that (1) biomass adsorption particles and a metal salt ion solution make contact in a soaking mode according to the solid-to-liquid ratio of 1:1-50 g / ml, and after filtering, separation and washing, water is added for size mixing to form a suspension state according to the solid-to-liquid ratio of 1:1-50 g / ml, and a material A is obtained; (2) a sodium borohydride aqueous solutionwith the concentration being 0.1-1 mol / L is prepared to serve as a material B; and (3) the material A and the material B are added into an auger type spiral mixer in a mixed mode according to the volume-flow rate ratio of 1:1-5, mixing and reinforcing contact are carried out in the auger type spiral mixer, a reduction reaction is completed, residual reagents are removed by rapidly washing outputmaterials, and the nanometer zero-valent metal loaded composite materials are obtained. By means of the method, the technical problems that nanometer zero-valent metal is prone to air oxidation and solid-liquid separation and washing are difficult in large-scale preparation are solved, and a highly engineered technological approach for large-scale preparation of the nanometer zero-valent metal materials is provided.

Description

Technical field[0001]The present invention relates to the preparation of nanomaterials, and in particular, a method of preparing a large-scale continuous metal material.Background technique[0002]Nano-zero-viable iron, nano-price nickel, nano-zero-covarian, nano-zero-duty silver, nano-zero price iron, nano-zero price iron copper, nano-zedi iron nickel, nano-zedi iron silver, nano-zero-zero-zero Silver copper and other one or more components of nano metal materials are widely concerned in the fields of environmental purification and repair, sterilization, catalytic degradation, wet metallurgy. Taking nano-zero-covarirate as an example, since its inception in 1997, it has been widely concerned that in terms of heavy metal wastewater resource, degradation of disinfection of organochlorine pesticides in water body and soil, and depth decomposition of oxidative toxic substances. I have got a lot of tasting applications and explorations, and have achieved good results and practical prospec...

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 Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 黄凯
Owner 北京科大科技园有限公司
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