In　order　to　develop　stable　and　efficient　extractant　to　meet　the　needs　of　ion　adsorbed　rare　earth　ores　for　Y　separation,　two　novel　salicylic　acid　derivatives,　i.e.,　o-octyloxybenzoic　acid　(OOBA)　and　o-ethylhexyloxybenzoic　acid　(EHOBA),　are　synthesized.　OOBA　is　an　oily　liquid　with　single　component　at　room　temperature,　which　is　suitable　for　solvent　extraction　and　has　the　consistent　properties.　The　extraction　behavior　of　Y　by　OOBA　is　resembled　to　light　rare　earth　elements　(LREEs)　than　heavy　rare　earth　elements　(HREEs).　Thus,　OOBA　has　better　selectivities　for　Y　and　other　HREEs　than　common　carboxylic　acids,　such　as　NA　and　sec-octyl　phenoxyacetic　acid　(CA-12).　By　FT-IR　and　slope　analysis,　it　can　be　inferred　that　the　extraction　mechanism　of　OOBA　is　cation　exchange,　and　the　extracted　complex　can　be　expressed　as　REL3.　The　effects　of　pH　value,　saponification　degree,　loading　concentration,　RE　concentration　and　OOBA　concentration　on　the　extraction　and　separation　of　HREEs　by　OOBA　are　also　discussed.　OOBA　has　been　provided　with　low　stripping　acid　concentration,　good　cycle　stability　and　less　loss　in　the　extraction　process.　The　concentration　of　OOBA　in　the　raffinate　is　only　about　28　ppm.　Finally,　a　process　for　separating　Y　from　the　industrial　Y-enriched　HREEs　feed　liquid　is　developed.　Through　the　simulated　fractional　extraction　including　9-stage　extraction　and　6-stage　scrubbing,　Y　product　with　the　purity　of　99.4%　and　the　yield　of　96.4%　is　obtained.