Gas Phase Hexamine Plant

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Description of Gas Phase Process

Gas phase processes save steam during the production process. Under vacuum conditions, use the formaldehyde’s potential heat and the heat generated from the reaction to evaporate the water in the hexamine solution. Gas phase processes for hexamine feature a short route, less side reactions and a high purity. Recycling operations with left over ammonia gas and methanol also remove environmental pollution and decrease consumption.

Flow chart

Main Equipment

Ammonia reactor
Ammonia Absorption Tower
Off-gas Washing Tower
Mother liquid seal trough
Vacuum pump
Spiral conveyor
Air heater
Crystallization head tank
Pneumatic drier
Off-gas absorption tower
Hot SW tank
Off-gas boiler
Cyclone separator
Desalted water

Production Process

The formaldehyde and ammonia gas react in the reactor, generating hexamine.
Dewater the hexamine solution to get solid hexamine.
Drying the solid hexamine.

Annotation: For more information and details 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	Index	Remark
formaldehyde (37%)	3.5t	Equivalent methanol 1.575t
ammonium (100%)	530kg	Free of oil and water
Circulating Cooling water	150t	Water temperature≤31℃ P≥0.4MPa
Steam	3.0-4.0t	P≥0.6MPa
Electricity	150kW·h	380/220V 50Hz
Demineralized Water	1～2t

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