As a high-efficient and high-quality energy and basic chemical raw materials, the demand of petroleum is increasing rapidly with the development of social economy. The contradiction between mature oil production technology and petroleum resources that can not be developed efficiently is increasingly prominent. The traditional oil displacement agent can not meet the demand of oil production technology because of "temperature and salt resistance".
Based on reformatsky reaction flooding interface modifier monomer design synthesis. Using octanal and ethyl chloroacetate as raw materials, α, β - unsaturated carboxylates were prepared by reformatsky reaction. Benzene was used as solvent and zinc copper couple as catalyst in traditional method. Although the yield was high, benzene was highly toxic to the environment and a carcinogen. In this paper, environmentally friendly water was selected as solvent, the yield of the product reached 60.5%.
Design and synthesis of new interface modification materials for fluorosilicone flooding. Hexamethyldisiloxane was used as double capper, 1,3,5,7-tetramethylcyclotetrasiloxane
(D4H) and d3f as raw materials and concentrated sulfuric acid as catalyst to prepare fluorine-containing polysiloxane framework by ring opening polymerization. On the basis of fluorine-containing polysiloxane framework, polysiloxane with si-c-p bond was synthesized by kabachnik fields reaction with polyformaldehyde and diethyl phosphite as raw materials. The results show that the activity of Si-H bond is much lower than that of N-H bond in kabachnik fields reaction.
Based on the design and synthesis of α - aminophosphate type double capper. Using chloromethyldimethylchlorosilane as the starting material, α - aminophosphate ester silane was synthesized by alcoholysis, kabachnik fields, quaternization or ammoniation, and then the corresponding siloxane double capper was synthesized by hydrolysis condensation. The synthesis method has many advantages, such as simple operation, mild conditions, short reaction time, high yield and atomic economy. In the same way, quaternary ammonium siloxane and α - aminophosphate ethylenediamine siloxane were synthesized.
Based on the design and synthesis of quaternary ammonium double capped fluorinated polysiloxane oil displacement interface modifier. Using quaternary ammonium siloxane double capped agent, D4 and d3f as raw materials and tetramethylammonium hydroxide as catalyst, an interface modifier based on quaternary ammonium double capped fluorine-containing polysiloxane for oil displacement was synthesized by ring opening polymerization. The interface modifier based on α - aminophosphate ethylenediamine siloxane double capped polysiloxane was synthesized by the same method. Compared with the traditional oil displacement agent, the synthesized oil displacement interface modifier has the function of "Three Prevention" due to the introduction of siloxane and fluorosilicone; meanwhile, the introduction of phosphate group enhances the biodegradation and compatibility of the oil displacement interface modifier.
Based on the basic application research of quaternary ammonium double capped fluorine-containing polysiloxane oil displacement interface modifier. The results show that the interfacial tension of the surfactant can reach 10-3 Mn / m at low concentration, the lowest surface tension is 21.76 Mn / m, CMC is 85.09 ppm, and it has good temperature and salt resistance.