CO_(2)响应型可切换溶剂作为萃取剂应用的研究进展

Research progress on CO_(2)-responsive switchable solvents as extractant

CO_(2)响应型可切换溶剂是指溶液性质(如极性等)能在通入和移出CO_(2)后发生可逆变化的一类溶剂。该类溶剂主要包括极性可变可切换溶剂和亲水性可变可切换溶剂。着重论述了CO_(2)响应型可切换溶剂作为萃取剂应用的研究进展;作为新型萃取溶剂,CO_(2)响应型可切换溶剂可用于萃取微藻和大豆等物质中的油脂,且在常压和低温下(<100℃)实现溶剂与溶质的分离及溶剂的回收利用。相较于传统萃取溶剂,该类溶剂节能优势十分明显,在萃取领域有着极大的应用潜力。

CO_(2)-responsive switchable solvent refers to a type of solvent whose solution properties(such as polarity,etc.)can change reversibly after feeding or removing CO_(2).Such solvents mainly include switchable solvents with variable polarity and switchable solvents with variable hydrophilicity.This review focuses on the research progress on the application of CO_(2)-responsive switchable solvents as extractants.As a new type of extraction solvent,CO_(2)-responsive switchable solvent can be used in the extraction of lipide from microalgae and soybeans.It can also be used to achieve the separation of the solvent from solutes and the recycling of the solvent at normal pressure and low temperature(<100℃).Compared with traditional extraction solvent,CO_(2)-responsive switchable solvent exhibits significant superiority in energy saving and has great application potential in the field of extraction.