Sodium
Hypochlorite
plant
BATCH-WISE PROCESS
FROM CHLORINE
AND CAUSTIC SODA
TECHNOLOGY
APPLICATION
The plant is based on liquid jet ejector technology and on the availability of liquefied chlorine in containers, 32% or 50% caustic soda solution and demineralized water. Electric power and chilled water are the only plant utilities required.
Product obtained is sodium hypochlorite solution at 3% or 6% concentration as active chlorine.
Batch-wise process is a small-scale suitable technology, cheap and safety, thought to match market demand for low production capacities. The low investment and operating costs make such a technology attractive for any Client which would undertake the production of sodium hypochlorite in small volumes and employing limited assets.
Standard plant capacity is 5 tons/batch of sodium hypochlorite solution. As all batch-wise processes, daily production depends on different parameters, such as requested concentration of sodium hypochlorite solution and scheduled number of working hours per day.
Designed to obtain
sodium hypochlorite
Active chlorine concentration
3% or 6%
Perfect if you need
small volumes production
Plant capacity
5 tons/batch
TYPICAL
PLANT SECTIONS
Typical plant consists of a single section, composed of the following main units:
– Liquid chlorine vaporization and heating
– Synthesis reaction loop
Complementary sections available are the following:
– Caustic soda and demi water storage and pumping
– Finished product storage
– Utilities production units
– Product bottling system
100%
MADE IN ITALY/EU
Our plants are designed and manufactured entirely in Italy and EU.
CERTIFIED
MANAGEMENT SYSTEM
We respect European standards and maintenance of ISO 9001 certification.
INNOVATION
COMES FROM EXPERIENCE
We constantly improve to assure the best quality and the newest technologies
PROCESS
DESCRIPTION
Sodium hypochlorite is synthetized starting from gaseous chlorine and opportunely diluted caustic soda solution according to the following reaction:
Cl2 + 2 NaOH → NaClO + NaCl + H2O
The above reaction takes place in a closed loop, which main equipment is the liquid jet ejector, where vaporized chlorine is absorbed by the motive fluid consisting of a liquid stream containing caustic soda.
Since the synthesis reaction is fairly exothermal while product shall be maintained at temperature not exceeding 26°C, the heat developing out of the process is continuously removed.
A chilled water cooled heat exchanger is part of the reaction loop.
The plant includes the following units:
LIQUID CHLORINE VAPORIZATION AND HEATING
Chlorine vaporization: Liquified chlorine is vaporized through isenthalpic expansion in a suitable designed valve. A significant cooling of the chlorine stream, down to -34°C, is associated to such an expansion.
Vaporized chlorine heating: Gaseous chlorine is heated up to 10°C, by means of a dedicated heat exchanger, before being sucked by the ejector.
SODIUM HYPOCHLORITE SYNTHESIS
Reaction loop: The closed reaction loop is composed by: liquid jet ejector, static mixer, sodium hypochlorite circulation tank, circulation pump and cooler. Adsorption and mixing of reactants, which start in the ejector, are promoted and completed by the static mixer and the circulation tank. In the latter equipment, also the initial charging of caustic soda and demi water is carried out. Circulation pump and cooler are designed in such a way as to avoid heat buildup in the reaction loop, which could lead to a harmful increase of product temperature.
Product discharging: Obtained sodium hypochlorite solution, contained into the circulation tank at the end of the batch-wise production, is discharged and sent to storage by means of the same circulation pump.
CONTROL
SYSTEM
Plant operation is semi-automatic.
Pivotal steps, such as raw materials dosing and reaction, are automatically regulated by advanced PLC system. Not crucial steps, such as product discharging, are manually managed by plant operator.
EXPERIENCE IN DESIGN AND
CONSTRUCTION ALL OVER
THE WORLD
We supply plants all over the world, from Saudi Arabia to Kuwait, from Ukraine to Greece, from Egypt to Nigeria.
WE LOOK FAR AHEAD
TO BE CLOSER TO YOU
WE COOPERATE WITH YOU TO SEEK
THE BEST SOLUTIONS TO MEET YOUR REQUIREMENTS.
YOUR PROBLEMS ARE OUR PROBLEMS.
