Dioctyl alcohol is a widely used raw material for the production of chemicals, mainly used in the production of plasticizers and stabilizers. The following is the manufacturing method of Dioctyl Alcohol:
I. Raw Material Preparation
1. Caprylic Acid: Caprylic acid is the main raw material of Dioctyl Alcohol, which needs to be purchased from the market.
2. Ethanol: Ethanol is used as solvent and reaction medium, which also needs to be prepared.
2. Reaction process
1. Add octanoic acid and ethanol into the reactor according to a certain molar ratio, generally the molar ratio of octanoic acid and ethanol is 1:2.5.
2. Turn on the stirring, so as to make the octanoic acid and ethanol mix fully.
3. Heating the reactor, controlling the reaction temperature at 80-100°C, so that the octanoic acid and ethanol undergo esterification reaction.
4. Water and ethanol azeotrope will be produced during the esterification reaction, separate the azeotrope through the fractionation column, collect ethanol for recycling, and discharge the water out of the system.
3. Post-treatment
1. When the esterification reaction in the reactor is carried out to a certain extent, stop heating and cool the reactor to room temperature.
2. Pour the reaction solution into a dispensing funnel and wash with water several times to remove the remaining acid and alcohol in the reaction solution.
3. Dry the washed dioctyl alcohol liquid with anhydrous sodium sulfate and filter to remove the sodium sulfate.
4. Finally the pure dioctyl lipid product is obtained by distillation.
The above is the basic manufacturing method of dioctyl ester, and the following points need to be noted in the specific production process:
1. Control the reaction temperature and time to avoid excessive esterification leading to product quality degradation.
2. Control the operating conditions of the fractionation column during the fractionation process to ensure the effective separation of ethanol and water.
3. The washing and drying effect should be ensured in the post-treatment process to avoid the product purity being affected.
All in all, the manufacture of dioctylin needs to master the operating points of raw material preparation, reaction process and post-treatment in order to produce high quality products.
