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[Chemical Knowledge]：Production and manufacturing method and process flow of sodium isophthalic acid -5-sulfonate

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Sodium isophthalate -5-sulfonate (also known as sodium 5-sulfoisophthalate) is an important chemical raw material, widely used in dyes, pharmaceuticals, pesticides and other fields. the following is the isophthalic acid -5-sodium sulfonate manufacturing methods:

1. raw materials and equipment

1. raw materials: isophthalic acid, fuming sulfuric acid, sodium hydroxide.
2. Equipment: reaction kettle, agitator, condenser, centrifuge, drying equipment, etc.

2. Manufacturing Steps

1. Sulfonation Reaction
of Isophthalic Acid Isophthalic acid and fuming sulfuric acid were added to a reaction kettle, stirred and heated to a certain temperature to carry out sulfonation reaction. The temperature and reaction time should be controlled during the reaction to ensure complete reaction. After completion of the reaction, the reaction mixture was cooled to room temperature to obtain a sulfonated product.
2. Neutralization Reaction
The sulfonated product is slowly added into an aqueous solution containing sodium hydroxide, stirred evenly, and the pH value is controlled within an appropriate range, so that the sulfonated product reacts with sodium hydroxide to generate sodium isophthalate -5-sulfonate.
3. Centrifugal separation
The reaction solution is centrifuged to obtain a wet material of sodium isophthalate -5-sulfonate.
4. Washing and Drying
Wash the wet material with a small amount of water and then dry it to obtain a finished product of sodium isophthalate -5-sulfonate.

3. Precautions

1. In the sulfonation reaction process, it is necessary to strictly control the temperature and reaction time to prevent excessive sulfonation or side reactions.
2. During the neutralization reaction, the pH value should be controlled within the appropriate range to ensure the purity and yield of the product.
3. When centrifuging, it is necessary to select the appropriate centrifuge and operating conditions to improve the separation effect.
4. During the drying process, it is necessary to control the drying temperature and time to prevent product deterioration or decomposition.

4. safety and environmental protection

1. In the production process, it is necessary to strictly abide by the safety operation procedures to ensure the safety of employees and equipment.
2. Effective treatment of waste gas, waste water and solid waste to ensure environmental protection standards.

The above is the manufacturing method of sodium isophthalate -5-sulfonate, and the specific operation process needs to be adjusted and optimized according to the actual production situation.

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