- Process introduction:
Epichlorohydrin is the main raw material for the production of epoxy resin, and it is also an important organic chemical raw material and fine chemical product with a wide range of uses. There are three main processes: propylene acetate method, propylene method, and glycerin method.
The traditional propylene method relies on petroleum resources for raw materials, and its basic price fluctuations are also deeply affected by petroleum prices.
In order to reduce the use of petroleum resources, the biodiesel industry has developed rapidly. During the development of this industry, the production of by-product glycerol has been increased, providing a reliable source of raw materials for the production of propylene oxide.
- Technical features:
The raw materials are glycerin and hydrogen chloride, which has a high safety factor, and the operating temperature is not harsh and the energy consumption is low.
(1) Catalyst consumption is low and composite catalyst is used. High selectivity and high yield.
(2) The overall investment is low.
(3) Wastewater reuse, zero discharge.
(4) Normally, it can directly reach the third level emission standard.
- Main process comparison:
(1) High-temperature chlorination of propylene:
The raw materials are propylene and chlorine, which have low safety and reliability, dangerous production and short operating cycle; high operating temperature and high energy consumption.
(2) Propylene acetate method:
The raw materials are propylene and chlorine, and there are still safety issues. The energy consumption is low, but the equipment investment is high.
(3) Glycerin method:
The raw materials are glycerin and hydrogen chloride, which has a high safety factor, and the operating temperature is not harsh and the energy consumption is low.
| project | High temperature chlorination of propylene | propylene acetate method | Glycerol method |
| Raw material 1 (t/tECH) | 0.66 (propylene) | 0.59 (propylene) | 1.1^1.130 (glycerin) |
| Raw material 2(t/tECH) | 2.1 (chlorine gas) | 0.9 (chlorine gas) | 1.0(HCl) |
| Base(t/tECH) | 1.10 (lime) | 0.70 (lime) | 0.72 lime |
| Investment (30,000 tons of ECH) | 250~300 million yuan | 400-500 million yuan | 150 million yuan |
| Safety and reliability | Dangerous, short operating cycle | Depends on Pd catalyst | Safe and reliable |
| Energy consumption | high | lower | 30~40% high temperature chlorination method |
| Wastewater volume (t/tECH) | 40~50 | 20~30 | 3 |
| Cost (10,000 yuan) | 1 | 1.1 | 0.7 |
4. Typical project: 30,000 tons of epichlorohydrin project
For more detailed technical information on glycerin-based epichlorohydrin, please contact us. Hubei Sanli Liquidambar Technology Co., Ltd. specializes in providing complete sets of chemical technologies.