Disodium Pyrophosphate (DSPP) is a common raw material for the production of chemicals, which is widely used in the fields of food, medicine and daily chemicals. This article will introduce the manufacturing method of Disodium Pyrophosphate in detail.
I. Manufacturing principle
Disodium pyrophosphate is produced by reacting phosphoric acid with sodium hydroxide. During the reaction, phosphoric acid reacts with sodium hydroxide to produce monosodium hydrogen phosphate, and monosodium hydrogen phosphate then reacts with sodium hydroxide to produce disodium pyrophosphate.
2. Manufacturing steps
1. Preparing raw materials
The following raw materials are needed to manufacture disodium pyrophosphate: phosphoric acid (H3PO4), sodium hydroxide (NaOH) and water (H2O).
2. Mixing the ratio of raw materials
According to the reaction equation, the molar ratio of phosphoric acid and sodium hydroxide is 1:2. In the actual production process, the ratio can be adjusted appropriately according to the production equipment and process conditions.
3. Mixing reaction
Add phosphoric acid and sodium hydroxide into the reactor according to the proportion, add appropriate amount of water and stir well. During the mixing process, the reaction will generate a lot of heat, and the reaction temperature needs to be controlled to avoid too high or too low temperature affecting the reaction process.
4. Neutralization and Adjustment
After the reaction is finished, it is necessary to adjust the pH value to neutral or slightly acidic with acidic substances such as hydrochloric acid or sulfuric acid to prevent the product from deteriorating.
5. Crystallization and Separation
When the reaction solution is cooled to a certain temperature, disodium pyrophosphate will crystallize and precipitate. Separate the crystals from the mother liquor by centrifuge or filter. Drying and Packing
The crystallized disodium pyrophosphate is dried to remove water. The dried product is packed to get the finished product of disodium pyrophosphate.
III. Precautions
1. In the production process, the quality and proportion of raw materials should be strictly controlled to ensure stable product quality.
2. The temperature should be controlled during the reaction process to avoid too high or too low temperature affecting the reaction process.
3. In the process of crystallization and separation, the cooling speed and temperature should be controlled to obtain high quality crystallized products.
4. In the drying process, the drying temperature and time should be controlled to avoid product deterioration or damage.
Four, application fields
Disodium pyrophosphate, as an important raw material for chemical production, is widely used in the following fields:
1. Food additives: Disodium pyrophosphate can be used as food additives, with the effect of improving the taste and stability of food and so on.
2. Pharmaceutical raw materials: disodium pyrophosphate can be used as raw materials in the pharmaceutical field, involved in the preparation of some drugs and medical supplies.
3. Daily-use chemicals: disodium pyrophosphate can be used in the preparation of detergents, cosmetics and other products in the field of daily-use chemicals.
All in all, the manufacturing method of disodium pyrophosphate is not complicated, but attention needs to be paid to the control of various process parameters during the production process to ensure product quality and stability. Meanwhile, disodium pyrophosphate is widely used in various fields, which brings great convenience to people's daily life and industrial production.
