Manufacturing method of Decabromodiphenyl ethane
Decabromodiphenyl ethane (DBDPE for short) is an important raw material for the production of chemicals, which is widely used in the fields of flame retardants, plastic additives and so on. This article will introduce the manufacturing method of Decabromodiphenyl ethane in detail, including the reaction principle, process flow, equipment selection and other aspects.
I. Reaction principle
The manufacture of decabromodiphenyl ethane is mainly realized by the reaction between bromine and diphenylethane. The specific reaction equation is as follows:
C6H5CH=CHC6H5 + 10Br2 → C6H4Br5CH=CHC6H4Br5
The reaction is a free radical substitution reaction, bromine and diphenylethane in the role of the initiator to produce free radicals, which triggered the free radical substitution reaction between bromine and diphenylethane.
2. Process flow
The manufacturing process of decabromodiphenyl ethane mainly includes the following steps:
1. Feeding: add a certain proportion of diphenylethane and bromine into the reactor.
2. Reaction initiation: add initiator and raise the temperature to initiate free radical substitution reaction.
3. Reaction control: Control the reaction temperature, pressure and acceleration of bromine titration to ensure the smooth progress of the reaction.
4. Post-treatment: After the reaction, carry out post-treatment operations such as cooling, separating, washing, drying, etc., to get decabromodiphenyl ethane product.
Three, equipment selection
In the manufacturing process of decabromodiphenyl ethane, it is necessary to select suitable reaction equipment and post-treatment equipment. The following are some of the main equipment selection:
1. Reactor: choose corrosion-resistant, high-temperature-resistant, high-pressure reactor to meet the reaction conditions.
2. Stirring device: choose efficient stirring device to ensure that the reaction materials are mixed evenly.
3. Dropping device: choose precise dropping device to control the dropping acceleration of bromine.
4. Separation equipment: Select centrifuge, filter and other separation equipment to realize the separation of products and impurities.
5. Washing and drying equipment: choose washing tower, dryer and other equipment to complete the washing and drying operation of the product.
4. Precautions
In the manufacturing process of decabromodiphenyl ethane, the following matters need to be paid attention to:
1. Strictly control the reaction temperature and pressure to prevent the equipment from over-pressure or over-temperature triggering safety accidents.
2. Ensure good ventilation during the reaction to avoid poisoning accidents caused by high concentration of bromine vapor.
3. Operators should be professionally trained and familiar with the manufacturing process and operating procedures to ensure the production process is safe and smooth.
4. Waste water, waste gas and other wastes need to be properly disposed of to meet environmental requirements.
All in all, the manufacture of decabromodiphenyl ethane needs to strictly comply with relevant regulations and safety operation procedures to ensure that the production process is safe, environmentally friendly and efficient. Through reasonable process design and equipment selection, high quality decabromodiphenyl ethane products can be produced, providing important raw material guarantee for the chemical production field.
