Manufacturing method of Butyl Waxate
Butyl Waxate is an important raw material for the production of chemicals, which is widely used in the fields of coatings, inks, plastics, rubber and so on. In this article, we will introduce the manufacturing method of butyl waxy acid ester, including raw material preparation, esterification reaction, distillation and purification steps.
I. Raw material preparation
The following raw materials are required for the manufacture of butyl waxy acid ester: wax acid, n-butanol, catalyst (sulfuric acid or p-toluenesulfonic acid). Among them, wax acid can be extracted from animal and vegetable fats and oils, and n-butanol can be prepared by ethylene hydration method.
II. Esterification reaction
Add wax acid and n-butanol into the reaction kettle at the ratio of molar ratio 1:1.1~1.2, and add catalyst at the same time. Heat the reaction kettle to a certain temperature (generally between 120~140℃) and keep it for a certain time (generally 4~6 hours) for esterification reaction. During the reaction, constant stirring is required to prevent the material from coking.
Third, distillation and purification
After the reaction is finished, the reaction solution is cooled to room temperature, and then distilled for purification. First of all, carry out atmospheric distillation, evaporate the unreacted n-butanol and water, and then change to decompression distillation, evaporate the wax acid butyl ester. In the distillation process, the distillation temperature and vacuum need to be controlled to ensure product quality.
Four, post-treatment
The wax acid butyl ester obtained by distillation needs to be post-treated, including decolorization, deodorization, dehydration and other steps. Generally, activated carbon adsorption method is used for decolorization, washing and deodorization with sodium hydroxide solution, and finally drying and dehydration with anhydrous magnesium sulfate.
In conclusion, the manufacturing method of butyl wax acid ester mainly includes the steps of raw material preparation, esterification reaction, distillation and purification, and post-treatment. In the operation process, it needs to pay attention to safety, control the reaction temperature and time to ensure product quality. At the same time, waste water and waste gas need to be treated to meet environmental requirements.
The above is only a basic manufacturing method of butyl wax acid ester, and it can be adjusted and optimized according to the specific conditions in the actual operation. For example, factors such as raw material ratio, catalyst type and dosage, reaction temperature and time can be changed to improve product quality and yield. In addition, for different sources of wax acid and n-butanol, their compositions and qualities may be different, so they need to be adjusted according to the actual situation.
V. Quality control
In the manufacturing process of butyl wax acid ester, product quality needs to be strictly controlled, including color, acid value, ester content and other indexes. Generally speaking, the lighter the color, the lower the acid value and the higher the ester content, the better the product quality. Therefore, it is necessary to carry out regular quality tests during the operation and adjust the process parameters in time to ensure stable product quality.
Sixth, environmental protection and safety
Wax acid butyl ester manufacturing process will produce a certain amount of wastewater, waste gas and waste residue and other pollutants, so it needs to be environmentally friendly treatment. Wastewater can be treated by biochemical treatment, physical and chemical treatment, etc.; Waste gas can be treated by absorption, adsorption, combustion, etc.; Waste residue can be utilized for resource utilization or safe landfill. At the same time, it is necessary to pay attention to safety in the operation process, comply with relevant regulations and standards, and ensure the life and property safety of employees and neighboring residents.
In conclusion, the manufacturing method of butyl wax acid ester needs to comprehensively consider various factors such as raw materials, process, equipment, environmental protection and safety to ensure product quality and production efficiency. At the same time, it is necessary to strengthen technical research and development and innovation, and constantly improve the level of manufacturing process and product quality, so as to contribute to the development of the chemical industry.
