Chlorine salt has an important application value in the field of raw materials for chemical production, especially in the pharmaceutical, pesticide, dyestuff and other industries. This article will introduce the manufacturing method of chlorine salt in detail, including raw material preparation, reaction process, post-treatment and precautions.
I. Raw material preparation
1. Chlorine gas: Chlorine gas is the main raw material for manufacturing chlorine salt, and industrial grade chlorine gas is usually used with high purity requirement.
2. Metal salt: the type of metal salt depends on the type of target chlorine salt, common ones such as sodium chloride, potassium chloride and so on.
3. Solvent: According to the need, water or other organic solvents can be used as the reaction medium.
II. Reaction process
The process of chlorine salt manufacturing mainly involves the reaction of chlorine gas with metal salts in aqueous solution. The following are the specific steps:
1. Prepare the metal salt into an aqueous solution of a certain concentration.
2. Under stirring conditions, slowly pass in chlorine gas to control the reaction rate and avoid localized over-concentration leading to side reactions.
3. Maintain the pH of the solution within a suitable range during the reaction to ensure that the chlorine gas reacts fully with the metal salt.
4. After the completion of the reaction, filter to remove insoluble material, to get the aqueous solution of chlorine salt.
3. Post-treatment
1. Evaporation and concentration: Evaporate and concentrate the aqueous solution of chlorine salt to obtain chlorine salt concentrate.
2. Crystallization: cool and crystallize the concentrated solution to obtain chlorine salt crystals.
3. Centrifugal Separation: Separate the chlorine salt crystals from the mother liquor by centrifugal separation.
4. Drying: Dry the chlorine salt crystals to obtain the final chlorine salt product. Precautions
1. Chlorine gas is poisonous, so it is necessary to strictly comply with the safety regulations during the operation to ensure production safety.
2. pH value should be closely controlled during the reaction process to avoid the production of by-products.
3. During the process of evaporation and concentration, the heating speed should be controlled to avoid the solution splashing out.
4. The cooling rate needs to be controlled during crystallization to obtain a better crystal form.
Through the above steps, we can make the desired chlorine salt product. In the actual production process, it is necessary to optimize and adjust according to the specific product type and production conditions. In short, the manufacturing process of chlorine salt requires strict control of the operating conditions of each link to ensure product quality and production safety.
