The invention discloses a sulfonated crude
phenol Bola type surfactant as well as a synthesis method and application thereof. The synthesis method comprises the following steps of: mixing crude phenolsubjected to
vacuum drying with a catalyst, slowly dropwise adding diisocyanate, heating the mixture to 60-100 DEG C under the protection of
nitrogen, and carrying out
vacuum pumping under reduced pressure to obtain an intermediate; adding concentrated H2SO4 and a
solvent into the intermediate, and carrying out a reaction at 70-80 DEG C to obtain a crude product; carrying out
vacuum drying on thecrude product, dissolving the crude product with
ethyl acetate, respectively washing an
ethyl acetate layer with water and saturated edible
salt water, and
drying the
ethyl acetate layer with
anhydrous MgSO4; distilling off ethyl acetate under reduced pressure to obtain a product, and taking the product as an
oil displacement agent. With the sulfonated crude
phenol Bola type surfactant adopted, the problem that other surfactant stratums are small in swept area when encountering oil, the problem that crude
phenol is toxic to oil products in
coal tar, and the problem that the
utilization rate of crude phenol is low can be solved. The crude phenol Bola type surfactant is prepared by taking phenolic substances as raw materials under the bridge action of IPDI and is applied to the field of heavy oil
recovery.