TY - JOUR
AU - Sergeev, V.
AB - V. I. Ul'yanenko, N. P. Yur'eva, UDC 661.185.223.5 and V. P. Sergeev In the sulfonation of the alkylaromatic and naphthenoaromatic hydrocarbons present in distillate lube stocks (for example, AS-6 and MSG-8) by the use of gaseous sulfur trioxide, followed by neutralization with an aqueous solution of ammonia or sodium hydroxide, an oil solution of sulfonates is obtained, with the following composition (% by weight) [1-3]: With removal of Without removal of acid tar acid tar Surfactants 13-25 25-30 Unsulfonated oils (hydrocarbons) 46-72 45-60 Inorganic salts 1.2-2 4-6 Water Remainder The surfactants present in the oil solutions after the acid tar has been removed consist mainly of oil-soluble sulfonates, which are arbitrarily assigned to Group B (on the basis of monosulfonic acids of naphthenoaromatic hydrocarbons with long side chains) [4]. The oil-soluble sulfonates are recovered from the oil solutions either by single-stage extraction with 60% isopropyl alcohol [5] or in two stages (treatment with water to remove the unsulfonated oils, followed by extraction with n-hexanol to remove the inorganic salts in mixture with the water-soluble sulfonates) [6]. The oil-soluble sulfonates are used as com- ponents of lubricating/cooling fluids and as detergent--dispersant additives for !ube oils. The surfactants present in the 
TI - Separation of oil-soluble sulfonates from sulfonated oils
JO - Chemistry and Technology of Fuels and Oils
DO - 10.1007/BF00719346
DA - 2004-11-17
UR - https://www.deepdyve.com/lp/springer-journals/separation-of-oil-soluble-sulfonates-from-sulfonated-oils-6tdLB5mcdP
SP - 214
EP - 217
VL - 22
IS - 5
DP - DeepDyve
ER -