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[Chemical Knowledge]：Production and manufacturing method and process flow of nitrosyl sulfuric acid

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Manufacturing method
of nitrosyl sulfuric acid
Nitrosyl sulfuric acid is an important raw material for chemical production, which is widely used in medicine, pesticide, dye and other fields. This article will introduce the manufacturing method of nitrosyl sulfuric acid, including raw material preparation, reaction process, post-treatment and so on.

1. Raw Material Preparation

The main raw materials for the manufacture of nitrosylsulfuric acid include sulfuric acid, nitric acid and sodium nitrite. Among them, the ratio of sulfuric acid and nitric acid is 3:1, and the amount of sodium nitrite is 10% of the total mass of sulfuric acid and nitric acid.

2. reaction process

1. sulfuric acid and nitric acid in proportion to the reaction kettle, stirring evenly.

2. Slowly add sodium nitrite under stirring, and control the feeding rate so that the reaction temperature does not exceed 50 ℃.

3. After the addition is completed, continue to stir the reaction for 1 hour to ensure that the reaction is complete.

4. After completion of the reaction, the reaction solution was cooled to room temperature.

3. post-treatment

1. the reaction liquid is poured into a crystallization kettle and allowed to stand for crystallization.

2. after the crystallization is complete, centrifugal separation, nitrosyl sulfuric acid crystal.

3. The crystals were washed with a small amount of water and dried to give the finished nitrosyl sulfuric acid.

4. Precautions

1. In the manufacturing process, the feeding speed should be strictly controlled to prevent the reaction from being too intense and causing safety accidents.

2. During the crystallization process, appropriate temperature and stirring speed should be maintained to promote crystal growth.

3. centrifugal separation, to maintain the appropriate speed and time, to avoid crystal damage.

5. yield and purity

The yield of this manufacturing method is about 85%, and the purity can reach more than 98%.

6. waste treatment
The waste generated in the
manufacturing process mainly includes waste acid and waste water. These wastes should be neutralized, precipitation and other treatment, to meet environmental standards before discharge.

7. safety and protection

in the manufacturing process, should strictly abide by the safety operation procedures, wear protective equipment, avoid contact with skin, eyes, etc. At the same time, ventilation facilities should be set to maintain the air circulation in the workshop.

In short, the manufacturing method of nitrosylsulfuric acid requires strict control of the process parameters and operating processes of each link to ensure product quality and production safety. At the same time, waste disposal and safety protection are also important links that cannot be ignored, and relevant regulations and standards should be strictly observed.

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