PROCEDIMIENTO PARA EL INCREMENTO DE LA DENSIDAD DE DETERGENTES SECADOS POR PULVERIZACION, REDUCIDOS EN FOSFATOS

• Main Authors: JAHNKE, ULRICH, ADLER, WILFRIED, JACOBS, JOCHEN, LOFFELMANN, RUDOLF, JUNG, DIETER
• Format: Patent
• Language: Spanish
• Published: 01.07.1996
• Edition: 6
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; METALLURGY; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; USE OF SINGLE SUBSTANCES AS DETERGENTS

CON EL FIN DE ELEVAR LA DENSIDAD DE UN DETERGENTE CON UN CONTENIDO REDUCIDO EN FOSFATOS QUE CONTIENE: (A) 4-20% DEL PESO DE AL MENOS UN TENSIDA ANIONACTIVO; (B) 2-20% DEL PESO DE AL MENOS UN TENSIDA NO IONICO; (C) 20-50% DEL PESO DE UNA SUSTANCIA BUILDER; (D) 3-25% DEL PESO DE ALCALIS DE LAVADO; (E) 0-30% DEL PESO DE OTROS COMPONENTES DE DETERGENTES ACCESIBLES POR SECADO EN CALIENTE; SE PRODUCE PRIMERO UN POLVO POR SECADO QUE CONTIENE SOLO UNA PARTE (MAX. 5% DEL PESO) DEL TENSIDA NO IONICO Y UN PESO DE AL MENOS 350 G/L. EL POLVO SE INTRODUCE CONTINUADAMENTE EN UN TAMBOR CILINDRICO DE MEZCLAS EN POSICION HORIZONTAL EN EL QUE ROTA AXIALMENTE UN EJE EQUIPADO CON HERRAMIENTAS AGITADORAS DE LONGITUD DEFINIDA. LA VELOCIDAD DE ROTACION DEL EJE SE REGULA DE FORMA QUE, PARA UN TIEMPOMEDIO DE PERMANENCIA DEL POLVO EN EL TAMBOR DE 10-60 SEGUNDOS Y UN PASO DE POLVO CONSTANTE, LA CIFRA FROUDE SE SITUA ENTRE 50 Y 1000. SIMULTANEAMENTE SE INTRODUCE EN EL MEZCLADOR EL RESTO DE TENSIDA NO IONICO EN FORMALIQUIDA. In order to increase the density of a detergent with a reduced phosphate content and a content of (A) 4 to 20% by weight of at least one anionic surfactant, (B) 2 to 20% by weight of at least one nonionic surfactant, (C) 20 to 50% by weight of at least one builder substance, (D) 3 to 25% by weight of alkalis, (E) 0 to 30% by weight of other detergent components amenable to hot spray drying, initially a powder which contains only a part, but at most 5% by weight, of the nonionic surfactant, and has a bulk density of at least 350 g/litre is produced by spray drying. The powder is then introduced continuously into a cylindrical, horizontally arranged mixing drum in which a shaft which is equipped with radially arranged beating implements of defined length rotates axially. The speed of rotation of the shaft is controlled so that at an average residence time of the powder in the drum of 10 to 60 sec, and a constant powder throughput the Froude number is between 50 and 1000. At the same time, the remaining non-ionic surfactant is introduced in liquid form into the mixer.