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Preparation method of nanometer zinc powder based on reducing atmosphere produced by methanol catalytic pyrolysis

A technology of catalytic cracking and nano-zinc powder, applied in the field of preparation of nano-zinc powder, can solve the problems of difficulty in industrialized production, easy deformation of crystal grains, uneven control and distribution, etc., and achieves no three-waste pollution, small particle size, and easy use. handy effect

Inactive Publication Date: 2011-04-13
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The operation process of preparing nano-zinc powder by vibration method consumes a lot of energy, and impurities are easily introduced, which reduces the purity, and the crystal grains are easy to deform, and the particle size is difficult to control and unevenly distributed.
Both CN1676670A and CN1912193A adopt ultrasonic electrolysis to prepare nano-zinc powder, but its technological process is relatively complicated, and it is difficult to realize industrialized production
However, the use of methanol catalytic cracking and reducing atmosphere to prepare nano-metal elements has not been reported in the literature at home and abroad.

Method used

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  • Preparation method of nanometer zinc powder based on reducing atmosphere produced by methanol catalytic pyrolysis
  • Preparation method of nanometer zinc powder based on reducing atmosphere produced by methanol catalytic pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The methanol catalytic cracking reducing atmosphere in this example is produced by a JCL-I methanol catalytic cracking machine produced by the Institute of Applied Chemistry, North China University (formerly North China Institute of Technology).

[0026] Open all the valves on the gas path connecting the methanol catalytic cracker and the reduction furnace, start the methanol catalytic cracker, open the valve of the methanol storage tank and the condensate water valve, set the temperature of the vaporization chamber to 220°C, and the temperature of the reactor to 100°C, and open the vaporization chamber and reactor heating switch to heat up.

[0027] When the temperature of the vaporization chamber rose to 150° C., the liquid feed regulating valve was opened, the flow rate of methanol was set at 60 ml / min, and methanol was introduced into the vaporization chamber.

[0028] After feeding for 15 minutes, the temperature of the reactor was adjusted to 350° C., and the temp...

Embodiment 2

[0038] Open all the valves on the gas path connecting the methanol catalytic cracker and the reduction furnace, start the methanol catalytic cracker, open the valve of the methanol storage tank and the condensate water valve, set the temperature of the vaporization chamber to 220°C, and the temperature of the reactor to 100°C, and open the vaporization chamber and reactor heating switch to heat up.

[0039] When the temperature of the vaporization chamber rises to 150° C., open the liquid feed regulating valve, set the flow rate of methanol to 50 ml / min, and feed methanol into the vaporization chamber.

[0040] After feeding for 15 minutes, the temperature of the reactor was adjusted to 300° C., and the temperature continued to rise.

[0041] Take by weighing 10g nano-zinc oxide with balance, be placed on medicine tray and pave, put into reduction furnace, seal.

[0042] Set the temperature of the reduction furnace to 360°C. After the methanol cracking reduction atmosphere re...

Embodiment 3

[0047] Open all the valves on the gas path connecting the methanol catalytic cracker and the reduction furnace, start the methanol catalytic cracker, open the valve of the methanol storage tank and the condensate water valve, set the temperature of the vaporization chamber to 220°C, and the temperature of the reactor to 100°C, and open the vaporization chamber and reactor heating switch to heat up.

[0048] When the temperature of the vaporization chamber rose to 150° C., the liquid feed regulating valve was opened, the flow rate of methanol was set to 70 ml / min, and methanol was introduced into the vaporization chamber.

[0049] After feeding for 15 minutes, the temperature of the reactor was adjusted to 350° C., and the temperature continued to rise.

[0050] Take 50g nano-zinc oxide with a balance, put it on the medicine tray and pave it, put it into the reduction furnace, and seal it.

[0051] Set the temperature of the reduction furnace to 400°C. After the methanol crack...

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Abstract

The invention discloses a preparation method of nanometer zinc powder based on reducing atmosphere produced by methanol catalytic pyrolysis. Nanometer zinc oxide is put into a reducing furnace, CO and H2 reducing atmosphere produced by methanol catalytic pyrolysis is led in after sealing, temperature is increased from 350 to 400 DEG C to react for 20 to 40 minutes, and nanometer zinc powder is obtained after cooling. The preparation method of nanometer zinc powder of the invention has the advantages of simple preparation route, easy control of technical process, moderate reaction condition, no need of high-temperature and high-pressure equipment, high efficiency, low cost, easy realization of commercial process and the like; reduction percentage can achieve above 90%; meanwhile, obtained zinc powder granularity is small, purity is high, no three waste exists, and zero emission is realized, so that the preparation method of the invention satisfies the requirement of green manufacturing. The invention adopts nanometer zinc powder having relatively low price as raw material to prepare nanometer zinc powder with low preparation price, thus establishing a simple and indirect method for preparing nanometer zinc powder.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a method for preparing metal nanomaterials, in particular to a method for preparing nanometer zinc powder. Background technique [0002] Nano-scale materials refer to ultra-fine particles with a grain size between 1 and 100 nm, which are in the junction area between atomic clusters and macroscopic objects. Since the unit scale of nanostructures is equivalent to many characteristic lengths in matter, such as the De Broglie wavelength of electrons, superconducting coherence length, tunneling thermal barrier thickness, ferromagnetic critical size, etc., nanomaterials have properties that are different from those of microscopic atoms. , Molecules are also different from the physical and chemical properties of macroscopic objects. This special type of structure of nanoparticles leads to its volume effect, surface effect, quantum size effect and macroscopic quantum tunn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22
Inventor 常双君刘玉存柴涛王建华于国强
Owner ZHONGBEI UNIV
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