Application field
Background technique
Acetone is a colorless transparent liquid with a special pungent smell. Miscible in water and organic solvents such as methanol, ethanol, ether, chloroform, pyridine, etc., flammable, volatile, and relatively active in chemical properties. Acetone is mainly used as a solvent in industries such as explosives, plastics, rubber, fiber, leather, grease, spray paint, etc. It can also be used as a solvent for the synthesis of enone, acetic anhydride, iodoform, polyisoprene rubber, methacrylic acid, etc. An important raw material for methyl ester, chloroform, epoxy resin and other substances.
Process comparison
Taking 4,000 tons/year acetone dehydration as an example, the initial water content of acetone is 20wt.%, and the water content of acetone products is ≤0.5wt.%. The operating energy consumption of packed tower rectification, high gravity rectification and membrane dehydration technologies are compared respectively.
|
name |
Packed column distillation |
high gravity distillation |
Molecular sieve membrane equipment |
|
Steam t/t |
1.45 |
1.22 |
0.41 |
|
Cooling water m 3 /t |
150 |
110 |
36 |
|
Electric kWh/t |
15 |
50 |
28.7 |
|
yield |
about 95% |
95~96% |
≥98% |
|
operate |
The operation is complicated, and it is necessary to always pay attention to the change of the composition of the tower top and adjust the operation in time |
The operation is simple and the degree of automation is high, but the post-maintenance cost of the high-gravity rotary bed is relatively high |
Simple operation, high degree of automation, stable product quality |
|
operating costs |
407.5 |
377 |
138.4 |
|
Remark |
Electricity: 1 yuan/kWh; steam: 250 yuan/t; cooling water: 0.2 yuan/t |
||
Taihua Pharmaceutical Chemical (Hangzhou) Co., Ltd. 1200 tons/year acetone pervaporation membrane device