Manufacturing method of isohexanol
Isohexanol is an important organic chemical raw material, which is widely used in fine chemicals, pharmaceuticals, pesticides and other fields. This article will introduce the manufacturing method of isohexanol, including raw material selection, reaction principle, process flow, equipment selection and other aspects.
I. Raw material selection
The raw materials for the manufacture of isohexanol are mainly ethylene, water and carbon monoxide. Among them, ethylene is the main carbon source, water provides hydrogen source, and carbon monoxide is used as reaction promoter. When selecting raw materials, factors such as their purity, source and cost should be considered.
II. Reaction Principle
The manufacture of isohexanol is mainly through the hydration reaction of ethylene to generate ethanol, and then the carbonylation reaction between ethanol and carbon monoxide under the action of catalyst to generate isohexanol. The specific reaction equations are as follows:
1. Ethylene hydration reaction: CH2=CH2 + H2O → CH3CH2OH
2. Ethanol carbonylation reaction: CH3CH2OH + CO → CH3COCH3
3. Process flow
The manufacturing process of isohexanol mainly includes the following steps:
1. Ethylene hydration reaction: ethylene and water are mixed in a certain proportion and then passed into a reactor equipped with a catalyst. After mixing ethylene and water in a certain proportion, it is passed into the reactor equipped with catalyst, and the hydration reaction is carried out under appropriate temperature and pressure to produce ethanol. Ethanol Carbonylation Reaction: Ethanol and carbon monoxide are mixed in a certain proportion and then passed into a reactor equipped with a catalyst to carry out carbonylation reaction under appropriate temperature and pressure to produce isohexanol.
3. Separation and purification of products: After the reaction, isohexanol is separated from the reaction mixture by distillation, rectification and other methods, and purified to obtain qualified isohexanol products.
Four, equipment selection
In the manufacturing process of isohexanol, the equipment to be used includes reactor, distillation tower, distillation tower, pumps, valves and so on. When selecting equipment, factors such as its performance, reliability and maintenance cost should be taken into consideration, and reasonable selection should be made according to the requirements of the production process.
V. Production control and safety measures
In the manufacturing process of isohexanol, reaction conditions need to be strictly controlled to ensure product quality and production safety. Specific control measures include:
1. Control the reaction temperature and pressure to avoid the occurrence of over-temperature and over-pressure phenomenon.
2. Regular maintenance and repair of the reactor and equipment to ensure their normal operation.
3. Strengthen on-site safety management and comply with relevant safety regulations and operating procedures.
VI. Environmental protection and waste treatment
In the manufacturing process of isohexanol, some waste and by-products will be produced, such as wastewater and exhaust gas. In order to ensure environmental protection and sustainable development, it is necessary to take effective measures for waste treatment and environmental protection. Specific measures include:
1. Pre-treatment and biochemical treatment of wastewater to ensure that it meets the emission standards and then discharged.
2. Treating waste gas by absorption, adsorption or incineration to reduce air pollution.
3. Strengthen the monitoring and management of wastewater, waste gas and other wastes to ensure that they are effectively treated.
In short, the manufacturing method of isohexanol involves a number of aspects, including raw material selection, reaction principle, process flow, equipment selection, production control and safety measures, as well as environmental protection and waste treatment. In the actual production process, it is necessary to comprehensively consider various factors, develop a scientific and reasonable manufacturing program to ensure product quality and production safety, and at the same time actively take environmental protection measures to promote the sustainable development of the chemical industry.
