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Licensed Unlicensed Requires Authentication Published by De Gruyter March 30, 2013

Dissolution Rate of Sodium Fatty Alcohol Sulfate FAS – Surfactants

Auflösungsvermögen von Tensiden aus Natrium-Fettalkohol-Sulfaten
R. Abdel-Rahem and J. Al-Hawarin

Abstract

We represent an applicable problem that arises when long chain surfactant fatty alcohol sulfate FAS is used in washing process. Octadecyl fatty alcohol sulfate C18-FAS is known for its strong washing performance, however it has the disadvantages of high Krafft point and its long dissolution rate. We demonstrate the factors that affect dissolution rates of FAS-surfactants, and how one can vary these factors in order to achieve particular dissolution rate. In this study, we have used a reproducible method for determining the rate of dissolution of anionic surfactants tablet and the effect of, temperature, hardness of FAS-tablets, stirring rate, FAS chain length, mixing with other surfactants and additives on the rate of dissolution of FAS have been studied.

Kurzfassung

Wir stellen ein Anwendungsproblem dar, dass entsteht, wenn in Waschprozessen langkettige Tenside aus Fettalkohol-Sulfaten (FAS) eingesetzt werden. Octadecyl-Fettalkohol-Sulfat C18-FAS ist bekannt für seine starke Waschkraft, hat aber nachteilig einen hohen Krafftpunkt und lange Auflösungszeiten. Wir zeigen die Faktoren auf, die das Auflösungsvermögen von FAS-Tensiden beeinflussen und wie man diese Faktoren variieren kann, um ein bestimmtes Auflösungsvermögen zu erreichen. In dieser Arbeit haben wir ein reproduzierbare Methode eingesetzt, um die Auflösung von anionischen Tensid-Tabs zu bestimmen, wobei die Einflüsse von Temperatur, Härte der FAS-Tabs, Rührgeschwindigkeit, FAS-Kettenlänge, Mischung mit anderen Tensiden und Additiven untersucht wurden.


Dr. Rami Abdel-Rahem, King Faisal University, Al-Ahsa Teachers College, Department of Science, Section of Chemistry, Qatar street, P.O. Box 2313, Al Hafouf 31982, Kingdom of Saudi Arabia, P.O. Box 2313. E-mail:

Dr. Rami Abdel-Rahem was born in 1974 (in As Sarih-Jordan), studied applied chemistry at Jordan University of Science and Technology. He obtained his PhD in 2003 from Bayreuth University (Germany) under supervision of Prof. Dr. Heinz Hoffmann. From 2003 until 2005, he worked as a lecturer of physical chemistry at the university of Al-Margeb (Libya). Since 2005, he has been an assistant professor of physical chemistry at Al Ahsa Teachers College (Kingdom of Saudi Arabia).

Dr. Jibril Al-Hawarin was born in 1965 (in Ma'an-Jordan), studied chemistry at Moscow State University of Fine Chemical Technology. He obtained his PhD in 1994 from Moscow State University (Russia) under supervision of Prof. Dr. I. A. Gritskova. From 1995 until 2003, he worked as a lecturer of chemistry at Al-Balqa Applied University (Jordan). Since 2003, he has been an assistant professor of organic chemistry at Al Ahsa Teachers College (Kingdom of Saudi Arabia).


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Received: 2007-05-06
Published Online: 2013-03-30
Published in Print: 2007-10-01

© 2007, Carl Hanser Publisher, Munich

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