Manufacturing method of tert-butyl peroxybenzoate
Tert-butyl peroxybenzoate (TBPB) is an important organic peroxy compound, widely used in polymer synthesis, initiators, oxidizers and other chemical production fields. In this paper, we will introduce the manufacturing method of tert-butyl peroxybenzoate, including raw material preparation, reaction steps, post-treatment and product quality control.
I. Raw material preparation
1. benzoic acid: benzoic acid is the main raw material for the preparation of tert-butyl peroxybenzoate, and the benzoic acid with high purity and stable quality should be selected.
2. tert-Butanol: tert-Butanol as another raw material of tert-butyl peroxybenzoate, should also choose the industrial products with high purity.
3. Hydrogen peroxide: Hydrogen peroxide is an oxidizing agent used to oxidize benzoic acid and tert-butanol to produce tert-butyl peroxybenzoate.
II. Reaction steps
1. Add benzoic acid and tert-butanol to the reactor at the ratio of 1:1 molar ratio, add appropriate amount of solvent (e.g., toluene), heat and stir until dissolved.
2. Slowly add hydrogen peroxide dropwise with stirring, control the rate of dropwise acceleration, and keep the reaction temperature within a suitable range.
3. Continue to stir the reaction for a certain period of time so that tert-butyl peroxybenzoate is fully generated.
4. At the end of the reaction, cool the reaction solution to room temperature for post-treatment.
3. Post-treatment
1. Pour the reaction solution into a dispensing funnel and wash with water several times to remove unreacted raw materials and by-products.
2. The organic phase is dried with anhydrous sodium sulfate and filtered to remove the desiccant.
3. Separate tert-butyl peroxybenzoate from solvent by distillation or rectification to get pure product.
4. Product quality control
1. Test the purity and impurity content of tert-butyl peroxybenzoate by gas chromatography, mass spectrometry and other analytical methods to ensure that the product quality conforms to the standard.
2. Test the stability, active oxygen content and other performance indexes of the product to meet the requirements of different application fields.
V. Precautions
1. The reaction temperature should be strictly controlled during operation to avoid too high or too low temperature affecting product quality and yield.
2. Dropwise addition of hydrogen peroxide should be carried out slowly to avoid too fast addition leading to local overheating and causing safety accidents.
3. In the post-treatment process, ensure that the washing and drying steps are sufficiently effective to ensure product quality.
4. Wastewater and exhaust gas generated in the production process should be effectively treated to meet the environmental requirements.
Summary:
The manufacturing method of tert-butyl peroxybenzoate involves raw material preparation, reaction steps, post-treatment and product quality control. In order to ensure the quality and yield of the product, the operation process needs to pay attention to the control of the reaction temperature, the speed of dropping hydrogen peroxide, the effect of post-treatment and environmental protection requirements. Through reasonable process design and operation, tert-butyl peroxybenzoate can be produced to meet the standard, providing high quality raw materials for the chemical production field.
