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[Chemical Knowledge]：Production and manufacturing method and process flow of dilute phosphoric acid

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The manufacturing method
of dilute phosphoric acid
1. Introduction

dilute phosphoric acid is an important chemical raw material, widely used in food, medicine, agriculture, metallurgy and other fields. Therefore, it is of great significance to study the manufacturing method of dilute phosphoric acid for improving product quality, reducing production costs and promoting industrial development. This article will introduce a common dilute phosphoric acid manufacturing method.

2. materials and equipment

1. materials: phosphate rock, sulfuric acid, water.
2. Equipment: reaction kettle, filter, storage tank, pump, stirrer, thermometer, pH meter, etc.

3. manufacturing methods

1. Pretreatment of phosphate rock: The phosphate rock is crushed, ground into powder, and then sieved to obtain a suitable particle size.
2. acidolysis reaction: the pretreated phosphate rock powder and sulfuric acid are added into the reactor according to a certain proportion, and the reaction is carried out under the action of stirring. The temperature and pH value should be controlled during the reaction to ensure the smooth progress of the reaction.
3. Filtration and separation: After completion of the reaction, the reaction solution was filtered to separate solid impurities.
4. Dilution and adjustment: Add a certain amount of water to the filtered solution, adjust the concentration and pH value of the solution, and obtain the required dilute phosphoric acid product.
Precautions for
4.

1. During operation, the reaction temperature and pH value should be strictly controlled to avoid equipment corrosion and product quality problems.
2. The filtering effect should be ensured during the filtering process to avoid the influence of solid impurities on product quality.
3. In the process of dilution and adjustment, the concentration and pH value of the solution should be adjusted according to the product requirements to ensure product quality.

5. conclusion The manufacturing method of

dilute phosphoric acid involves many links, including pretreatment of phosphate ore, acidolysis reaction, filtration and separation, dilution and adjustment. In the actual production process, the process parameters of each link should be strictly controlled to ensure product quality and production efficiency. Through the manufacturing method introduced in this paper, dilute phosphoric acid products that meet the requirements can be produced, and reliable raw material guarantee can be provided for the production of related fields.

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