Manufacturing method of tert-butyl acrylate
Tert-butyl acrylate (TBA) is an important organic chemical raw material, which is widely used in polymer synthesis, coatings, adhesives, textile treatment and other fields. This article will introduce the manufacturing method of tert-butyl acrylate in detail, including raw material preparation, reaction process, post-treatment and product quality control.
I. Raw material preparation
1. acrylic acid: acrylic acid is the main raw material for the production of tert-butyl acrylate, you should choose a higher purity of acrylic acid, to ensure product quality.
2. tert-butanol: tert-butanol as another raw material for esterification reaction, also need to ensure high purity.
3. Catalyst: Sulfuric acid is usually chosen as the catalyst to promote the esterification reaction.
2. Reaction process
1. Pre-treatment: add acrylic acid and tert-butanol into the reactor according to a certain ratio, and add catalyst sulfuric acid at the same time.
2. Heating reaction: turn on the stirring, gradually increase the temperature of the reactor, and keep it in the range of 60-80℃ for esterification reaction.
3. Dewatering: During the reaction process, water will be generated, which needs to be discharged in time through the water separator in order to promote the reaction in the direction of generating tert-butyl acrylate.
4. Post-treatment: When the reaction proceeds to a certain degree, stop heating and cool the reaction solution to room temperature.
3. Post-treatment and product quality control
1. Neutralization and washing: Add alkaline absorbent to the reaction solution to react with residual sulfuric acid, and then wash to remove impurities in the reaction solution.
2. Distillation: Separate tert-butyl acrylate from unreacted acrylic acid and tert-butanol by distillation operation to obtain tert-butyl acrylate with higher purity.
3. Quality Inspection: Carry out quality inspection on the produced tert-butyl acrylate, including purity, acid value, color and other indexes, to ensure that the product meets the relevant standards.
4. Safe production and environmental protection requirements
1. Safe production: During the production process, safety operation regulations should be strictly observed to ensure the normal operation of equipment and prevent accidents.
2. Environmental Protection Requirements: Waste water, waste gas and other pollutants generated in the production process should be treated and discharged after meeting the environmental protection standards in order to reduce the impact on the environment.
V. Suggestions for optimizing the production process
1. Improvement of raw material purity: using raw materials with high purity is conducive to improving the product quality and yield of tert-butyl acrylate.
2. Catalyst selection: Other types of catalysts can be tried to improve the reaction rate and selectivity.
3. Optimize process parameters: Improve production efficiency and product quality by adjusting process parameters such as reaction temperature and reaction time.
4. Strengthen equipment maintenance: Regularly check and maintain the production equipment to ensure the normal operation of the equipment and reduce the failure rate.
In short, the manufacturing method of tert-butyl acrylate involves several links and factors, in order to ensure product quality and production efficiency, it is necessary to strictly control the quality of raw materials, optimize the reaction process, strengthen the post-treatment and product quality control. At the same time, attention is paid to safety production and environmental protection requirements to promote the development of chemical production in the direction of green and efficient.
