Manufacturing Method of Soft Stearic Acid
I. Introduction
Soft Stearic Acid is a common saturated fatty acid with the molecular formula of C16H32O2, which is widely found in animal and plant fats and oils. In the field of raw materials for chemical production, corky stearic acid has an important application value, and can be used to produce soap, lubricants, plastic plasticizers and so on. In this paper, the manufacturing method of soft stearic acid will be introduced, including raw material preparation, reaction process, post-processing and other links.
II. Raw material preparation
1. Stearic acid: stearic acid is the main raw material of soft stearic acid, which can be obtained by hydrolysis of animal and vegetable fats and oils or distillation of fatty acids and other methods.
2. Sodium hydroxide: Sodium hydroxide is used as a base catalyst to promote the saponification reaction of stearic acid.
3. Reaction process
1. Saponification reaction: Stearic acid and sodium hydroxide are added into the reactor according to a certain proportion, and heated and stirred, so that stearic acid and sodium hydroxide undergo saponification reaction to produce sodium stearate.
2. Acidification reaction: add appropriate amount of sulfuric acid or hydrochloric acid to the reactor, so that sodium stearate undergoes acidification reaction with acid to generate stearic acid and corresponding salt.
3. Washing and separation: Wash the reaction mixture with water to remove impurities and unreacted raw materials, and then separate out the chondritic acid by centrifugation or filtration etc.
4. Post-treatment
1. Drying: the isolated chondroitonic acid is dried to remove water.
2. Purification: Distillation, crystallization and other methods can be used to further purify the stearic acid and improve the product quality.
V. Precautions
1. Control the reaction temperature and time: Both saponification reaction and acidification reaction need to be carried out under certain temperature and time to ensure the reaction and product quality.
2. pH adjustment: In the process of acidification reaction, pH needs to be adjusted to a suitable range to ensure that the reaction is carried out and the purity of the product.
3. Safe operation: In the production process, it is necessary to pay attention to safe operation to avoid the harm of chemicals such as alkali catalyst and acid to human body and environment.
VI.CONCLUSION
The manufacturing method of soft stearic acid mainly includes the steps of raw material preparation, saponification reaction, acidification reaction, washing and separation, and post-treatment. By controlling the reaction conditions and post-treatment means, the product of stearic acid with high purity can be obtained. In the actual production process, it is necessary to choose the appropriate process and equipment according to the specific conditions and requirements to ensure the quality and yield of the product. At the same time, the safety management and environmental protection measures in the production process are strengthened to guarantee the smooth progress of the production process and the health of the employees.
