Process to obtain a highly soluble linear alkylbenzene sulfonate, in which at least 18% by weight of the isomers of said a highly soluble linear alkylbenzene sulfonate are the 2-phenyl derivatives, comprising the steps of: i) obtaining an olefin/paraffin mixture through catalytic dehydrogenation of paraffins; ii) purifying olefins from the mixture formed in step i); iii) separating non linear compounds from the mixture obtained in step ii) by a selective adsorbent; iv) treatment of the non linear compounds extracted in the step iii) to form the hydrotropic precursor; v) alkylating benzene with the purified olefin/paraffin mixture obtained in step iii); vi) purifying the crude linear alkylbenzenes obtained in step v); vii) sulfonating the linear alkylbenzenes obtained in the step vi); viii) neutralizing the linear alkylbenzene sulfonic acids obtained in step vii); characterized in that the treatment of step iv) to form said hydrotropic precursor comprises at least one of the procesess selected from the group consisting of fractionation, hydrogenation and/or selective adsorption, said hydrotropic precursor obtained in the step iv) being added to the purified linear alkylbenzene stream, either before the sulfonation and neutralization steps, the purified linear alkylbenzene stream and the hydrotropic precursor thus being sulfonated together, or the hydrotropic precursor being sulfonated and neutralized and subsequently added to the purified linear alkylbenzene sulfonate obtained after step viii), wherein said hydrotropic precursor comprises: - from 2 to 20% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 4 carbon atoms; - from 5 to 40% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 5 carbon atoms; - from 15 to 30% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 6 carbon atoms; - from 0,5 to 50% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 7 carbon atoms; - from 0,01 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 8 carbon atoms; - from 0,5 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 9 carbon atoms; and - from 0,5 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 10 carbon atoms. i) obtaining an olefin/paraffin mixture through catalytic dehydrogenation of paraffins; ii) purifying olefins from the mixture formed in step i); iii) separating non linear compounds from the mixture obtained in step ii) by a selective adsorbent; iv) treatment of the non linear compounds extracted in the step iii) to form the hydrotropic precursor; v) alkylating benzene with the purified olefin/paraffin mixture obtained in step iii); vi) purifying the crude linear alkylbenzenes obtained in step v); vii) sulfonating the linear alkylbenzenes obtained in the step vi); viii) neutralizing the linear alkylbenzene sulfonic acids obtained in step vii); - from 2 to 20% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 4 carbon atoms; - from 5 to 40% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 5 carbon atoms; - from 15 to 30% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 6 carbon atoms; - from 0,5 to 50% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 7 carbon atoms; - from 0,01 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 8 carbon atoms; - from 0,5 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 9 carbon atoms; and - from 0,5 to 10% by weight of alkyl aromatic compounds having one or more alkyl groups which have in total 10 carbon atoms.