Rhodium catalyst separation and recovery method and application thereof

The invention belongs to the field of isononanal synthesis, and particularly relates to a rhodium catalyst separation and recovery method and application thereof. The Rh catalyst and the TMS solvent system are utilized, so that the conversion rate of isooctene reaches 99% or above, the selectivity of isononanal reaches 98% or above, after the reaction of carbonyl synthesis of isononanal is finished, the TMS system has poor miscibility through cooling, the catalyst is dissolved in a polar phase, an organic product is in a non-polar phase, and the yield of isononanal is increased. The catalyst and the product are separated according to the solubility difference of the catalyst and the product in the two phases, so that the high-efficiency separation of the product and the catalyst is realized. 本发明属于异壬醛合成领域，具体涉及一种铑催化剂分离回收的方法及其应用。本发明利用Rh催化剂和TMS溶剂体系，不仅使异辛烯的转化率达到99％以上，异壬醛的选择性达到98％以上，而且在羰基合成异壬醛反应结束后，通过降温使TMS体系存在混溶差，其中，催化剂溶解在极性相中，而有机产物在非极性相中，根据催化剂和产物在两相中的溶解度差异将它们分离出来，实现产物和催化剂的高效分离。