Sales of the core product, molecular-sieve pervaporation membranes, are made to the United States and the European Union.
Acetonitrile
Project Background
Acetonitrile is an important organic chemical feedstock that is widely used as a solvent or reactant. During its production or recycling, it often needs to be separated from water. Because acetonitrile and water form an azeotrope with a boiling point of 76.3°C at atmospheric pressure—containing 84% acetonitrile by mass—conventional distillation cannot achieve effective separation. Current separation methods mainly include (salt‑added) extractive distillation, pressure‑swing distillation, and membrane permeation–vaporization dehydration.
Technical Comparison
| Name |
Membrane separation |
Pressure-swing distillation |
| Steam (t/t raw material) |
1.2 |
2.5 |
| Circulating water (m³/t of raw material) |
50 |
250 |
| Low-temperature water (m³/t of raw material) |
4 |
20 |
| Chilled water (m³/t of raw material) |
5 |
0 |
| Electricity (kWh/t of raw material) |
30 |
20 |
| Operating cost (RMB/t of raw material) |
287 |
580 |
| Yield (%) |
High, ≥97 |
Low, 90–93 |
| Number of distillation columns (units) |
1 |
2 |
| Maximum operating pressure (MPa(G)) |
0.2 |
0.3~0.4 |
| Required steam pressure (MPa(G)) |
≥0.4 |
0.6~0.7 |
| Operational complexity |
Simple, automatic control |
Complex, multi-player operation |
| Equipment investment |
Relatively high |
Low |
| Annual operating costs (based on 10 m³ per day and 250 operating days per year, equivalent to 2,000 tons per year) |
Energy consumption is reduced by RMB 600,000; the increased yield generates annual savings of over RMB 800,000 (based on an acetonitrile price of RMB 10,000 per ton), for total annual savings exceeding RMB 1.4 million. |
|
| Process Selection |
Recommendation |
Not recommended |
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The data presented on this website are partly derived from the company’s internal statistics and customer feedback and are provided for reference only. For specific product performance and applicability, please refer to the contract and technical agreement signed by both parties.
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