Epichlorohydrin is the main raw material for the production of epoxy resin. It is also an important organic chemical raw material and fine chemical product. It has a wide range of uses. There are three main processes: acryl acetate process, propylene process and glycerin process. In the traditional propylene process, raw materials rely on petroleum resources, and the fluctuation of its basic price is also affected by the oil price.
In order to reduce the use of petroleum resources, the biodiesel industry is developing rapidly. In the process of the development of the industry, the by-product glycerol production has been improved, which provides a reliable source of raw materials for the production of propylene oxide.
GET GLYCERIN TO ECH TECHNOLOGY
SL Tec has rich experience in providing ECH production process to increase productivity in ECH manufacturing. If you have demand on Glycerin to ECH techology or buiding a ECH plant, please feel free to contact us to get further consultance.
Features of ECH Production By Glycerin Method
1. The consumption of catalyst is low and composite catalyst is used with high selectivity and yield.
2. Low total investment.
3. Waste water recycling, zero discharge.
4. Normally, it can directly reach the emission standard.
Main Process Comparison
● High temperature chlorination process of propylene
The raw materials are propylene and chlorine, which are low in safety and reliability, dangerous production and short operation cycle; high operation temperature and high energy consumption.
● Propylene acetate process
The raw materials are propylene and chlorine, so there are still problems in safety, low energy consumption, but high equipment investment
● Glycerin process
The raw materials are glycerin and hydrogen chloride, with high safety factor,low energy consumption and less harsh operating temperature.
Technology Comparison
Item | High temperature chlorination process of propylene | Propylene acetate process | Glycerin process |
Raw material 1(t/t ECh) | 0.66（propylene） | 0.59（propylene） | 1.1^1.130（glycerin） |
Raw material1(t/t ECh) | 2.1（Chlorine） | 0.9（Chlorine） | 1.0（HCI ） |
Alkali(t/t ECh) | 1.10（CaO） | 0.70（CaO） | 0.72 CaO |
Investment（30000t ECH） | CNY 250 ~300 million | CNY 400 ~500 million | CNY 150 million |
Safe reliability | Dangerous and short operating cycle | Depends on Pd catalyst | Safe and reliable |
Consumption | High | Lower | 30~40% high temperature chlorination process |
Waste water quantity (t/t ECh) | 40~50 | 20~30 | 3 |
Cost(ten thousand yuan) | 1 | 1.1 | 0.7 |
Capacity and Product Index
30,000TPA ECH (Annual operating time: 7600 hrs)
Product | Production capacity Kg/h | Operating time Hours |
ECH | 3948 | 7600 |
ECH Product Index
Component | Unit | Value |
ECH | %wt. | >99.9 |
Water content | ppm.wt. | <200 |
Chroma | APHA | <15 |
HCI(Gas)Product Index
Component | Unit | Value |
Hydrochloric acid | %wt. | +/-24 |
Organics | ppm.wt. | Little |
Color | APHA | Faint yellow |
Consumption
Main raw material consumption
Consumption of per ton of ECH production
Item | Specification(purity) | Consumption |
Glycerin | 98.5% | 1.093t |
HCI | 99%（gas phase） | 0.974t |
Calcium Chloride | 92% | 0.72t |
Consumption of anxiliary material
Item | Specification(purity) | Consumption |
Catalyst | Compound | 0.005t |
Utility consumption
Consumption of Per Ton of ECH production
Item | Unit | Consumption |
Steam(1.0Mpa) | t | 5 |
Steam(2.5Mpa) | t | 1.1 |
Power | kwh | 240 |
Circulating water | t | 180 |
Chilled water(5℃) | t | 50 |
Instrument air | Nm³ | 30 |
Nitrogen | Nm³ | 10 |
