CS216618B1 - Process for the production of powder detergent compositions - Google Patents

Abstract

The invention relates to a method for producing powdered detergents, which consists in adsorbing an anionic surfactant onto a substance with an active p surface area of from 40 to 300 m/g in a weight ratio of 0.5 to 15:1, preferably 2 to 5:1, after which the other components of the detergent are added. The sorbent may contain 0.5% to 50% by weight of adsorbed water.

Description

BACKGROUND OF THE INVENTION The present invention relates to a process for the manufacture of powdered detergent compositions or powdered semi-products used for the manufacture of detergent compositions by mixing powdered raw materials in mixers of any design, with or without the possibility of spraying liquid components.

In the manufacture of powdered detergent compositions and semi-products for their manufacture, there is an increasingly strong departure from traditional technology, i.e. spray tower drying, and the transition to a more energy efficient manufacturing process by mixing powdered ingredients in mixers where liquid component spraying is often used.

However, some technical limitations apply to this energy-efficient manufacturing process. Above all, the content of soft materials is limited, especially one of the basic ingredients of detergent products - powdered anionic surfactants, which, due to mechanical stress during processing in mixers, cause deterioration of visual quality of products (clumping), stickiness of products. These characteristics then cause breakdowns of the process equipment and make it difficult or impossible to handle the products, in particular the emptying of the equipment and the packaging of the products. These drawbacks are partially eliminated by the additional addition of some flow enhancers, for example sodium tripolyphosphate, soda ash, silica derivatives. The problem is further exacerbated when using liquid components. By mixing, it is practically impossible to produce concentrated detergents, where the surfactant content increases, and in particular,

I manufacture powdered semi-products for the production of detergents, characterized by a high concentration of soft materials, in particular anionic surfactants.

The aforementioned drawbacks are overcome by the process for the manufacture of the detergent powders and the semi-finished products according to the invention, characterized in that an anionic surfactant, for example sodium alkylbenzene sulphonate or sodium alkyl sulphate or sodium alkyl sulphonate or sodium soap or a mixture thereof containing 30 to 98% active substance and having an alkyl or alkane chain length of 10 to 22 carbon atoms, absorbs on an active surface of from 40 to 300 m ² / g from the group of polymers based on organic acids and their derivatives such as polyacrylic acid, polymethacrylic acid, polymethacrylate, or halogen derivatives of hydrocarbons such as polyvinyl chloride, or alcohols, their ethers and esters such as polyvinyl alcohol, polyvinyl acetate, or hydrocarbons such as polystyrene, or polymers with a heterogeneous nitrogen-containing chain such as e.g. urea-formaldehyde resins, or copolymers, such as a copolymer of vinyl chloride and vinyl acetate, and / or inorganic materials such as hydrated silica, titanium, aluminum, zeolite, or mixtures thereof in a weight ratio of 0.5 to 15, preferably 2 to 5 The sorbents used may contain 0.5 to 50 wt. additionally adsorbable water.

The primary mixing of a high active surface area sorbent with an anionic surfactant powder will coat the soft anionic surfactants with a mechanically inert and liquid

216 618 components resistant to hydrated fumed silica, whereby soft anionic surfactants lose unwanted tack and can be processed even at high levels of energy-intensive mixing technology.

The process according to the invention is illustrated by the following examples.

Example 1

20% by weight of sodium dodecylbenzenesulfonate powder with 80% of active ingredient are added to a mixer of any design suitable for the manufacture of powdered detergent compositions and 7% by weight are added under stirring. of hydrated silica.

After mixing, 10 wt. 50% solution of ethylenediaminetetraacetic acid laurylamide, 3% by weight % stearyl alcohol with 10 moles of ethylene oxide, 50 wt. % sodium tripolyphosphate, 3 wt. % carboxymethylcellulose and 7 wt. powder soap. A highly efficient concentrated detergent suitable for washing in automatic washing machines is obtained.

Example 2

A mixer of any design is charged with 80 wt. Sodium lauryl sulphate β 96% of the active substance and 20% w / w are added under stirring. polyethylene terephthalate. A powdered semi-product suitable for the production of powdered detergent compositions is obtained.

Claims (2)

Process for the manufacture of powdered detergent compositions, characterized in that an anionic surfactant, for example sodium alkylbenzerisulphonate or sodium alkyl sulphate or sodium alkene sulphonate or sodium alkyl sulphonate or sodium soap, or a mixture thereof containing 30 to 98% of active ingredient and an alkyl or an alkene chain of 10 to 22 carbon atoms absorbs on an active surface of from 40 to 300 m / g, from the group of polymers based on organic acids and their derivatives such as polyacrylic acid, polymethacrylic acid, polymethacrylate, or halogenated hydrocarbon derivatives such as polyvinyl chloride or alcohol, their ethers and esters such as polyvinyl alcohol, polyvinyl acetate, or hydrocarbons such as polystyrene, or polymers with a heterogeneous nitrogen-containing chain such as urea-formaldehyde resins, or copolymers such as e.g. an ice copolymer of vinyl chloride and vinyl acetate and / or inorganic substances such as hydrated silica, titanium, aluminum, zeolite and / or mixtures thereof in a weight ratio of 0.5 to 15: 1, preferably 2 to 5: 1, after which the other detergent ingredients. 2. A process according to claim 1, characterized in that the powdered anionic surfactant is mixed with sorbents containing 0.5 to 50% by weight. water.