Liquid Phase Hexamine Plant
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The liquid phase process uses a 37% formaldehyde solution and ammonium. The hexamine solution is then dewatered by evaporator and enters the centrifugation and drying device in order to obtain hexamine. This is an advanced, easy process. Because of the use of evaporation for dehydration, the crystal culture period is long and the urotropine particles are larger.
Flow chart
Main Equipment
- Film-type evaporator
- Air-flow dryer
- Mother liquid filtration equipment
- Waste water
- Ammonia stripper
- Reactor
- Film Evaporator
- Vapor-liquid separator
- Concentrate tank
- Evaporation pot
- Crystallization receiver
- Centrifuge
- Spiral conveyor
- Desalted water
Production Process
- The formaldehyde solution and ammonia gas react in the reactor, generating hexamine.
- Condense hexamine product to 60-65% concentration.
- Evaporation, condensation, centrifuge and drying of 65% hexamine.
Annotation
- The process requires the use of a set of mother liquid filtration equipment because the liquid formaldehyde and condensation batch operations are used, often producing impurities and side reactions that affect product purity.
- For more information on the production process, please do not hesitate to contact us.
Product Specifications
Item | Superior | First Grade | Acceptable |
Purity % ≥ | 99.3 | 99 | 98 |
Moisture % ≤ | 0.5 | 1 | |
Ashes % ≤ | 0.03 | 0.05 | 0.08 |
Aqueous solution appearance | Acceptable | - | |
Heavy Metal as Pb2+ % ≤ | 0.001 | - | |
Chloride as Cl- % ≤ | 0.015 | - | |
Sulphate as SO42- % ≤ | 0.02 | - | |
Ammonium as NH4+ % ≤ | 0.001 | - |
Feedstock Consumption Quota
Particular | unit | Index | Remark |
Formaldehyde (37%) | t | 3.5~3.6 | |
Ammonium (100%) | kg | 530~550 | |
Circulating Cooling water | t | 250~300 | Water temperature≤25℃P≥0.4MPa |
Steam | t | 7.0~8.0 | P≥0.4MPa |
Electricity | kW·h | 180 | 380/220V 50Hz |
Demineralized Water | t | 1~2 | As per standard of D.W. |
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