Three preparation methods of zinc oxide

Overview of Zinc Oxide ZnO Powder

Zinc oxide ZnO powder is a famous white pigment, commonly known as zinc white. It has the advantage that it does not turn black in the presence of H2S gas because ZnS is also white. On heating, ZnO gradually changed from white and pale yellow to lemon yellow. After cooling, the yellow color will gradually disappear. Using this property, it can be mixed into paints or added to thermometers to make color-changing paints or thermometers. Because ZnO has astringency and certain bactericidal ability, it is often used as ointment in medicine. ZnO can also be used as a catalyst. Zinc oxide ZnO is used as an additive in many materials and products, including cosmetics, food supplements, rubber, plastics, ceramics, glass, cement, lubricants, coatings, ointments, adhesives, sealants, pigments, food, batteries, Ferrite, flame retardant and most importantly, tape.

Three preparation methods of zinc oxide

1. Direct method:

1. It is obtained by calcining zinc carbonate. ZnCO3=ZnO+CO2↑

2. It is obtained by calcining and decomposing zinc hydroxide.

3. Zinc is smelted from crude zinc oxide, and then oxidized by high temperature air.

4. It is obtained by oxidation of molten zinc.

5. The methods used include the indirect method (also known as the French method) using zinc ingots as the raw material, the direct method (also known as the American method) and the wet method using zinc ore as the raw material.

Second, the indirect method. Reaction equation: 2Zn+O2=2ZnO

Operation method: The zinc ingot prepared by electrolysis is heated to 600～700℃ and melted, then placed in a high temperature resistant crucible to melt and gasify at a high temperature of 1250～1300℃, introduce hot air for oxidation, and the resulting zinc oxide is cooled , cyclone separation, the fine particles are collected with cloth bags, that is, the finished product of zinc oxide is obtained.

direct method. Reaction equation:

C+O2=CO2

CO2+C=2CO

ZnO+CO=Zn(steam)+CO2

Zn (steam)+CO+O2=ZnO+CO2

Operation method: The roasted zinc ore powder (or zinc-containing material), anthracite (or coke) and limestone are prepared into balls in a ratio of 1:0.5:0.05. After reduction smelting at 1300°C, the zinc oxide in the mineral powder is reduced to zinc vapor, and then the air is introduced for oxidation, and the generated zinc oxide is captured to obtain the finished zinc oxide.

3. Wet method. The zinc ash is reacted with sulfuric acid to generate zinc sulfate, which is then reacted with sodium carbonate and ammonia water respectively, and zinc oxide is prepared by using the prepared zinc carbonate and zinc hydroxide as raw materials. The reaction equation is as follows:

Zn+H2SO4=ZnSO4+H2↑

ZnSO4+Na2CO3=ZnCO3↓+Na2SO4

ZnSO4+2NH3·H2O=Zn(OH)2↓+(NH4)2SO4

Using zinc carbonate as raw material, the product zinc oxide is obtained by washing, drying, calcining and pulverizing. ZnCO3→ZnO+CO2↑

Using zinc hydroxide as raw material, the product zinc oxide is prepared by washing with water, precipitation, drying, calcination, cooling and crushing. Zn(OH)2→ZnO+H2O

Zinc oxide ZnO powder application

1. Mainly used in rubber or cable industry as reinforcing agent and active agent, also as colorant and filler for white glue, as vulcanizing agent in neoprene, etc.

2. In the fertilizer industry, the raw gas is used for fine desulfurization

3. Mainly used as white pigment, rubber vulcanization activator, organic synthesis catalyst, desulfurizer, for electrostatic copying, pharmaceuticals, etc.

4. It is used for desulfurization of synthetic ammonia, petroleum and natural gas chemical raw materials

5. Used as a matrix for analytical reagents, reference reagents, fluorescent agents and photosensitive materials

6. It is used for electrostatic wet copying, dry transfer printing, laser fax communication, electrostatic recording of electronic computers and electrostatic plate making files

7. Used in the plastic industry, sunscreen cosmetics products, special ceramic products, special functional coatings and textile hygiene processing, etc.

8. It is widely used in the deep desulfurization and purification process of industrial raw material gas and oil such as synthetic ammonia, methanol and hydrogen production.

9. Used as astringent medicine, used to make ointment or plaster

10. It is used as a white pigment for printing and dyeing, papermaking, matches and pharmaceutical industries. In the rubber industry, it is used as a vulcanization activator, reinforcing agent and colorant for natural rubber, synthetic rubber and latex. Also used in the manufacture of pigments zinc chrome yellow, zinc acetate, zinc carbonate, zinc chloride, etc. In addition, it is also used in electronic laser materials, phosphors, feed additives, catalysts, magnetic materials to manufacture feed additives, and as zinc supplements in feed processing.

Zinc oxide ZnO powder price

The price of zinc oxide powder will change randomly with the production cost of zinc oxide powder, transportation cost, international situation, market supply and demand and other factors. Tanki New Materials Co.,Ltd aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for Zinc Oxide Zinc Oxide Powder, please feel free to send an inquiry to get the latest price of Zinc Oxide Zinc Oxide Powder.

Zinc oxide ZnO powder suppliers

As a global zinc oxide ZnO powder supplier, Tanki New Materials Co., Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (cerium oxide, zinc oxide, nickel oxide), high-purity target materials, functional ceramics and structural devices, and provides OEM services.