Improvement of Industrial Linear Alkyl Benzene for Detergents Production
Kirkuk University Journal-Scientific Studies
Standard and specifications of Linear Alkyl Benzene (LAB) compound are essential in the production of most good quality detergents. Pure LAB was obtained by purification of industrial LAB samples, followed by controlling/overcoming the problem of conversion of paraffinic materials to undesirable olefins. Concentrated sulfuric acid was used to remove the olefinic contaminants from the industrial LAB samples. The results were obtained using potentiometric method and color changes in Lovibond
... es in Lovibond photometer. Evidently, significant improvement of the specifications was observed and thus, improved final products are industrially obtained. The new and modified reaction procedure has resulted in a superior quality LAB-based detergent product, compared to that obtained using LAB under the normal operating conditions. 052 C12 -lab Wt. % 26 -32 UOP 698 C13 -lab Wt. % 10 -20 UOP 698 C14 -lab Wt. % 0.5 Max UOP 698 Total lab Wt. % 92 Min UOP 698 2 -phenyl Wt. % 20 Max UOP 673 Colour Saybolt +29 Min ASTM D-156 Br. Indx mg / 100g 15 Max ASTM D-1492 Biodegrability of Sodium Alkyl Benzene Sulfonate, pct 90 Min ASTM D-2667 Completeness of Sulfonation, pct 98 Min 052 The Bromine Index was determined using two methods: Titration Technique: Measurement of Bromine Index was conducted using a Metrohm titration equipment, Swiss made, as shown in Fig. (3), (Available in Arab Company for Detergent Chemicals, Iraq( The titrant [KBr-KBrO 3 ] (0.5 N) solution was prepared by dissolving 51 g of KBr and 13.92 g of KBrO 3 using distilled water in a (1 L) volumetric flask, and completed to the mark with distilled water. While the titration consisted of a mixture of glacial acetic acid (714 ml), 1, 1, 1-trichloroethane (134 ml), methanol (134 ml), and sulfuric acid-20% (18 ml) [14,15,16]. Fig. (3): Metrohm titration equipment used measurement of Bromine Index. 2.1.2 The titration process involved the addition of precisely weighted sample to be measured (2 ml) to 100 ml of the solvent in the titration beaker. The mixture was cooled down to (0-5 ᵒ C) and titrated, automatically, with the titrant, bromide-bromate (0.5 N) using a double platinum wire pole where the End-Point of the reaction was determined. The Bromine Index was calculated by the following relationship: Where EP1 = The end point of the reaction; taken from the device reading; Wt of sample = Weight of the sample in which the olefin compounds is to be estimated.