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[Chemical Knowledge]：The production and manufacturing methods and processes of insurance powder.

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The manufacturing method
of insurance powder
insurance powder, the chemical name is sodium dithionite, is an important raw material for the production of chemicals. It has strong reducibility and is widely used in textile, printing and dyeing, papermaking, food and other industries. This article will detail the manufacturing method of insurance powder.

1. Raw Material Preparation

The main raw materials for the manufacture of insurance powder are sodium hydroxide, sulfur powder and caustic soda. In order to ensure the quality of the product and the smooth progress of the production process, it is necessary to choose high-quality raw materials.

2. manufacturing process

1. preparation of lye: sodium hydroxide dissolved in water, prepared into a certain concentration of lye, standby.
2. Melting sulfur: Heat the sulfur powder to melting state for standby.
3. Reaction: The lye is mixed with molten sulfur to react to generate sodium hydrosulfite.
4. Cooling crystallization: The reaction liquid is cooled to a certain temperature to crystallize the hydrosulfite.
5. Centrifugation: The crystallized hydrosulfite is separated from the mother liquor by a centrifuge.
6. Washing and drying: Wash the hydrosulfite crystals with a small amount of water, and then dry to a certain moisture content with drying equipment.
Precautions for
3.

1. Control the reaction temperature: The reaction temperature has a great influence on the yield and quality of the sodium hydrosulfite and needs to be strictly controlled.
2. Adjust the pH value: The pH value needs to be adjusted during the reaction to ensure the formation and stability of the sodium hydrosulfite.
3. Prevent impurities from entering: Prevent impurities from entering during the production process, so as not to affect product quality.

4. yield and quality control

1. yield: yield by the quality of raw materials, reaction temperature, pH and other factors, the need to determine the best process conditions through experiments to improve the yield.
2. Quality control: It is necessary to carry out quality inspection on the produced insurance powder, including purity, moisture content, pH value and other indicators to ensure that the product quality meets the requirements.

5. environmental protection and safety measures

1. Wastewater treatment: The wastewater generated in the production process needs to be treated to meet environmental protection requirements.
2. Waste gas treatment: The waste gas generated in the production process is collected and treated to reduce the impact on the environment.
3. safety protection: in the production process, we should strictly abide by the safety operation procedures to ensure the safety of employees and equipment.

6. Packaging and Storage

1. Packaging: Insurance powder is usually packed in cardboard drums or plastic drums lined with plastic bags to ensure product quality.
2. Storage: insurance powder should be stored in a dry, cool, ventilated warehouse, avoid direct sunlight and high temperature. Avoid contact with oxidants and acids during storage to avoid fire or explosion.

Through the above manufacturing method, we can obtain high-quality sodium hydrosulfite. In order to ensure the smooth progress of the production process and product quality, it is necessary to strictly control the process conditions, strengthen the quality management and environmental protection and safety measures in the production process. At the same time, reasonable packaging and storage are also important links to ensure product quality and safety.

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