Marsina liquid detergent technology allows the production of any kind of liquid detergent inside the range of types and concentrations required for household and personal care commercial products.
The production process is based on batch-wise operations.
Plant capacity is directly related to the reactor volume, to the number of reactors installed and to the product recipe, which, in its turn, determines the duration of each production batch.
Reactors are available in two different sizes, 1.5 MT or 3 MT, while single or several production lines can be foreseen so matching almost any plant capacity value.
Marsina technology allows to process a wide range of raw materials.
The plant is able to produce liquid detergents for many different applications, such as follows:
- house cleaning
- glass cleaning
- heavy-duty laundry washing
MAIN PLANT SECTIONS
Typical plant is composed of the following main sections:
- Liquid raw materials tankage and feeding
- Reaction and mixing
- Finished product filtration and discharging
Complementary units/sections available are the following:
- Liquid raw materials storage
- Water softening/demineralizing system
- Finished product storage
- Finished product bottling system
- Utilities production units
The whole liquid detergents production cycle involves only two chemical phenomena, which are the neutralization reaction and the product buffering. All other steps are physical type and dealing with deep mixing operations.
The neutralization reaction, occurring between linear alkylbenzene sulphonic acid (LABSA) and caustic soda, leads to the production of the so called “Active Matter”, according to the following path:
R-SO3H + NaOH → R-SO3Na + H2O
It takes place in a stirred reactor, wherein diluted caustic soda and sulphonic acid are the first two raw materials to be charged.
Subsequent feeding of remaining raw materials foreseen by the recipe and intense mixing complete the liquid detergent production.
The finished product pH adjustment concludes the cycle.
The plant includes the following sections:
Liquid raw materials tankage and feedingRaw materials daily tankage
The amount of raw materials required by the daily production are wisely stored into dedicated daily vessels located near, and often over, the reactors.
For all raw materials not purchased in usable form but prepared on site, such as citric acid solution and brine, both dissolving tank and daily vessel are foreseen.
Raw materials feeding
Liquid raw materials foreseen by the recipe are dosed by means of reactors weighing systems. Their feeding is carried out by gravity in all cases in which it is possible, so saving pumping energy.
Their charging into the reactor follows a pre-set sequence.
Reaction and mixingReaction and mixing
The reactors are equipped with multi-impellers agitators, designed with the dual function of promoting mixing and preventing foaming.Product pH adjustment
Deep and complete mixing is also achieved by recirculating outside of the reactor a set flow rate of the product.
The heat developed by caustic soda dilution and neutralization reaction, which are both exothermic processes, is opportunely removed by equipping the reactors with jackets wherein cooling water is circulated.
The liquid detergent pH adjustment is the last step of the production cycle, aimed to complete the achievement of product specification.
It is carried out by adding caustic soda or citric acid to the product mass while going on mixing and checking the pH value.
Finished product filtration and discharging
Liquid detergent filtration, necessary to stop any possible foreign body, is realized through on line cartridge filters installed on product discharging line.
Detergent transferring to storage is carried out by means of the same mono-screw pump employed also for product recycle to the reactor.
The plant is almost fully automatic to guarantee maximum accuracy in the formulation and to minimize number of necessary operators.
All operations, except product buffering, are controlled and regulated by advanced PLC system, guiding the plant in accordance to formulate the desired recipe.