Cooperation mode：Transfer or cooperative production
Market price：The product of this project is an important organic chemical raw material and fine chemical product, which has a wide range of uses. In 010, domestic manufacturers mainly include Jiangsu Anbang Electrochemical, Shandong Bohui Group, Shandong Jixian Huaxiang Chlorate, Shandong Xinyue, Jiangsu Yangon, Baling Petrochemical, Shandong Zhonghai Fine, Shandong Haili, Qilu Petrochemical, Tianjin Chemical, and The production capacity is about 660,000 tons, plus imported 22,400 tons. In 2010, the apparent consumption of domestic epichlorohydrin was about 700,000 tons. Considering the huge market gap of epoxy resin, domestic epichlorohydrin can not fully meet the market demand, and the market prospect of epichlorohydrin is unquestionable.
Route of Synthesis：The project uses glycerin, hydrochloric acid and urea as raw materials to produce epichlorohydrin in five processes including glycerol, chlorohydrin, hydrochloric acid, esterification and decarburization.
Equipment needed：Glycerol refining device|DN2000|台||3
Cone circulation chlorination reactor|DN1000|台|18
3-Chloro 1,2-propanediol refining tower|DN2000|台|9
Acetic acid absorption device|台|9
Exhaust gas absorption tower|DN1000|台||6
Hydrochloric acid analysis system | sets | 6
Carbonate refining tower|DN2000|台||3
Ammonia recovery unit | sets | 3
Decarburization reaction tower|DN2000|台||3
Carbon dioxide recovery unit | sets | 3
Detachment Tower|DN1600|台 ||3
Heavy component processing system (incinerator) | Set | 1
Wastes：The wastewater is 35,200 tons/year, the waste gas is 540 tons/year, and the solid waste is 12,540 tons/year.
The project uses glycerin, hydrochloric acid and urea as raw materials to produce epichlorohydrin in five processes including glycerol, chlorohydrin, hydrochloric acid, esterification and decarburization.
The process is as follows:
I. Glycerin section 95% glycerol is sent to the middle of the glycerin refining tower (in this process, the flow is automatically adjusted by the automatic regulating valve), and the vapor phase from the reboiler is exchanged for heat and mass in the refining tower, and the water in the glycerol is heated from the glycerin. separate from. The water vapor coming out from the top of the tower enters the cooler, and is cooled to below 45 °C with circulating water as a cooling medium, pumped to a wastewater treatment station for treatment, and the bottom glycerin is sent to the chlorohydrination step.
Second, the chlorool section
With acetic acid as a catalyst, the reaction is carried out at a temperature of 100 ° C, steam heating, and atmospheric pressure, and the catalyst concentration is about 1 to 2%. Glycerol reacts with hydrogen chloride to form 3-chloro 1,2-propanediol. Chlorohydrin produces tail gas emissions, mainly hydrogen chloride, and the hydrogen chloride tail gas is absorbed by the absorption tower to produce by-product hydrochloric acid.
After chlorohydrinization, rectification is carried out, acetic acid is distilled off and recovered for repeated use, and rectification produces high-boiling heavy components as hazardous waste disposal. The tail gas is discharged by distillation, and the main pollutant component is 3-chloro 1,2-propanediol.
Third, the hydrochloric acid section
The hydrogen chloride tail gas produced in the chlorohydrin workshop is absorbed by the absorption tower to produce by-product hydrochloric acid, and the by-produced hydrochloric acid is sent to the top of the analytical tower (in this process, the flow rate is automatically adjusted by the automatic regulating valve), and the hydrogen chloride gas coming out from the top of the tower enters the cooler. Use circulating water (30-40 ° C) as a cooling medium to cool it to below 45 ° C, then enter the cooler, and then use chilled water (water around 0 ° C) as a cooling medium, and then cool it to 5 ~ 15 ° C; The HC1 after the second cooling enters the concentrated hydrochloric acid separator, and further removes the water mist therein to obtain a high-purity hydrogen chloride gas, and sends it to the chlorohydrinization step. Effluent column generated into the sewage treatment station.
Fourth, ester chemical section
In the presence of a catalyst (solid acid), 3-chloro-1,2-propanediol is transesterified with urea to form a chloropropene carbonate, and the ammonia gas produced by the reaction enters an ammonia recovery system.
After purifying the reaction product, a relatively pure chloropropene carbonate is obtained, and rectification produces a high boiling point heavy component.
Distillation exhaust gas, the main pollutant is chloropropylene carbonate.
Five, decarbonization section
The chloropropylene carbonate forms epichlorohydrin and carbon dioxide in the presence of a catalyst (solid acid) which enters the recovery system.
The epichlorohydrin is distilled to remove impurities and obtain a product. Distillation produces exhaust emissions and the main component is epichlorohydrin. A small amount of rectified residue is produced at the bottom of the distillation column.