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AssigneeColgate-Palmolive Company
InventorsGualtiero Barletta, Antonio Bianchi
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A particulate detergent composition, such as one comprising sodium linear higher alkylbenzene sulfonate (LAS) and bentonite, is made directly from anionic synthetic organic detergent acid by neutralizing such acid with a neutralizing agent, such as aqueous sodium hydroxide solution, in a reaction vessel and directly discharging the neutralized detergent salt from the reaction vessel into an absorption zone wherein globules of the anionic detergent salt, in aqueous solution or dispersion, and particulate solid carrier particles are rapidly circulated and repeatedly brought into contact with one another to produce detergent salt-carrier composition particles or agglomerates. In preferred aspects of the invention the bentonite will be admitted exteriorly to the neutralized detergent salt solution in an absorption zone so as to prevent contact with the walls of such zone of the aqueous solution or dispersion of detergent salt, and the detergent salt-carrier composition will be directly delivered to an agglomerator, granulator or tumbling drum, and the composition will be converted to particles of desired sizes. Also within the invention are apparatuses that are useful in carrying out the described processes. Additionally, instead of employing aqueous or liquid neutralizing agents, powdered solids may be used, in which case the neutralization and absorption functions may take place in the same zone and be effected by the same materials, such as alkaline builders, e.g., sodium carbonate.
A process for manufacturing a particulate detergent composition which comprises reacting an anionic synthetic organic detergent acid with a neutralizing agent for it in a reaction vessel in sufficient proportion to produce a corresponding neutralized detergent salt in liquid or slurry state, removing the neutralized detergent salt from the reaction vessel in such state and directly transferring it to a walled absorption zone interiorly of a particular carrier for it, so that the carrier helps to prevent contact of the detergent salt liquid or slurry with the surrounding absorption zone walls, and mixing the resulting particulate carrier containing absorbed detergent salt liquid or slurry, to produce a detergent salt-carrier composition in particulate form.
A process for manufacturing a particulate detergent composition which comprises reacting an anionic synthetic organic detergent acid with an excess of neutralizing particulate builder salt for such anionic synthetic organic detergent, in the presence of bentonite powder, in a walled absorption zone, by directing liquid state aqueous detergent acid into such zone interiorly of the builder salt and bentonite, which are directed into such zone exteriorly of the detergent acid, and mixing the acid, in droplets, and the builder particles together in such absorption zone by means of air movement therein, which inhibits contact of liquid state detergent acid with the absorption zone walls prior to contacting of such acid with such builder salt and bentonite particles, and prior to absorption of the neutralized detergent salt by the bentonite.
A process for manufacturing a particulate built detergent composition in a walled neutralizing zone which comprises reacting an anionic synthetic organic detergent acid with particulate sodium carbonate by spraying such liquid detergent acid as droplets into the interior of moving particulate sodium carbonate particles which are maintained in rotational movement between the detergent acid droplets and the wall of the neutralizing zone until substantially all of the detergent acid is neutralized by the sodium carbonate, resulting in particles of neutralized detergent salt with excess sodium carbonate thereon.
Dependencies are inferred from the claim text.