Manufacturing Method of Isobutyl Acetate
Isobutyl Acetate is an important organic chemical raw material, widely used in coatings, inks, spices, pharmaceuticals and other fields. This article will introduce the manufacturing method of Isobutyl Acetate, including raw material selection, reaction principle, process flow, equipment selection and other aspects.
I. Selection of raw materials
The manufacture of isobutyl acetate mainly uses acetic acid and isobutanol as raw materials, of which acetic acid can be obtained by using glacial acetic acid or acetic anhydride, and isobutanol can be obtained by using n-butanol or isobutyraldehyde reduction. When choosing raw materials, purity, moisture, acidity and other factors need to be considered to ensure the smooth progress of the reaction and the quality of the product.
II. Principle of reaction
The manufacture of isobutyl acetate is realized by the esterification reaction of acetic acid and isobutanol, the reaction equation is as follows:
CH3COOH + (CH3)2CHOH → CH3COOC(CH3)3 + H2O
The reaction is a reversible reaction, and a catalyst is needed to promote the reaction, and commonly used catalysts are sulphuric acid, hydrochloric acid, p-toluenesulphonic acid etc.
Three, process flow
The manufacturing process of isobutyl acetate mainly includes the following steps:
1. Feeding: add the measured acetic acid and isobutanol into the reaction kettle.
2. Heating reaction: turn on the stirring, heat the reaction kettle, and control the reaction temperature within a certain range to make the reaction proceed.
3. Separation and purification: after the reaction is completed, cool the reaction solution to room temperature, separate out the unreacted raw materials and water, and get the crude product.
4. Refining: distill the crude product to get pure isobutyl acetate product.
4. Equipment selection
In the manufacturing process of isobutyl acetate, equipment such as reactor, stirrer, heater, condenser, separator and so on are needed. When selecting the equipment, it is necessary to make comprehensive consideration according to the production scale, product quality requirements, operation mode and other factors, in order to ensure the reliability and production efficiency of the equipment.
V. Precautions
1. In the operation process, the reaction temperature and time need to be strictly controlled to avoid the occurrence of side reactions.
2. In the process of separation and purification, it is necessary to ensure the separation effect and operation safety.
3. In the process of equipment use, regular maintenance and repair are needed to ensure the normal operation and service life of the equipment.
All in all, the manufacture of isobutyl acetate needs to choose suitable raw materials, master the reaction principle, formulate a reasonable process flow, choose suitable equipment, and strictly abide by the operating procedures and safety requirements to ensure the quality of the product and the safety of production.
