LABSA is anionic surfactant with molecules characterized by a hydrophobic and a hydrophilic group. Alpha-olefin sulfonates (AOS) alkyl sulfates (AS) are also examples of commercial anionic surfactants. They are nonvolatile compounds produced by sulfonation. LABSA is a complex mixtures of homologues of different alkyl chain lengths (C10 to C13 or C14) and phenyl positional isomers of 2 to 5-phenyl in proportions dictated by the starting materials and reaction conditions, each containing an aromatic ring sulfonated at the para position and attached to a linear alkyl chain at any position with the exception of terminal one (1- phenyl).The properties of LABSA differ in physical and chemical properties according to the alkyl chain length, resulting in formulations for various applications in laundry and home care products.The starting material LAB (linear alkyl benzene) is produced by the alkylation of benzene with n-paraffins in the presence of hydrogen fluoride (HF) or aluminum chloride (AlCl3) as a catalyst, the latest is DETAL process by UOP. LABSA is produced by the sulfonation of LAB with sulphuric acid in batch reactors. Other sulfonation alternative reagents are oleum, diluted sulfur trioxide, chlorosulfonic acid and sulfamic acid on falling film reactors.The high viscosity of the formed products reduces the heat transfer coefficient from the reaction mass. Effective cooling of the reaction mass is essential because high temperatures promote side reactions that produce undesirable by-products. Also, precise control of the molar ratio of SO3 to organic is essential because any excess SO3, due to its reactive nature, contributes to side reactions and by-product formation. Therefore, commercial scale sulfonation reactions require special equipment and instrumentation that allows tight control of the mole ratio of SO3 to organic and rapid removal of the heat of reaction. Sulfuric acid (H2SO4) is widely used as sulfonating agent. It is an equilibrium process, as water is formed in the reaction and the resultant water dilutes the sulfuric acid. The sulfonation reaction stops when the sulfuric acid concentration drops to approximately 80%. This process has the dual advantage of low SO3 cost and low capital equipment cost as compared to the gas sulphonation route. However, it has the disadvantage of being an equilibrium process which leaves large quantities of un-reacted sulfuric acid. This waste acid must be separated from the reaction mixture and subsequently used in manufacture of SSP and other fertilizers.