Design, Synthesis And Basic Research Based On Organosiloxane Interface Modifiers

As a high-efficiency high-quality energy and basic chemical raw materials,the demand for petroleum has increased rapidly with the development of today's social economy.The contradiction between mature oil production technology and the failure to develop high-efficiency oil resources has become increasingly prominent.Traditional oil displacement agents cannot meet the needs of oil exploration technology because of "not resistant to temperature and salt." The paper starts from the third oil recovery,and solves the liquid/solid and liquid/liquid interface in the mining process as the research object,and designs and synthesizes the interface modifier suitable for chemical flooding.The specific work is as follows:(1)Based on the Reformatsky reaction flooding,the interface modifier monomer is designed and synthesized.Using octanal and ethyl chloroacetate as raw mate:rials for the preparation of ?,?-unsaturated carboxylic acid esters by the rifamycin reaction,the conventional method uses benzene as a solvent and zinc-copper coupler as a catalyst.Although the yield is high,benzene is high.It is highly toxic to the environment and is also a carcinogen.In this paper,environmentally friendly water is chosen as the solvent,and the product yield is 60.5%.(2)Design and synthesis of new materials for interface modification of fluorine-containing polysiloxane flooding.The fluoropolysiloxane skeleton was prepared by ring-opening polymerization using hexamethyldisiloxane as a double blocking agent,D4H and D3F as reaction raw materials,and concentrated sulfuric acid as a catalyst.On the basis of the fluorine-containing polysiloxane skeleton,a fluoropolysiloxane compound containing Si-C-P bond was synthesized by a Kabachnik-Fields reaction using paraformaldehyde or diethyl phosphite as a reaction raw material.According to the reaction conditions(catalyst,raw material molar ratio,temperature and solvent,etc.),the results show that in the Kabachnik-Fields reaction,the Si-H bond activity is much lower than that of the N-H bond.(3)Design and synthesis based on a-phosphoramidate type double blocking agent.Using chloromethyldimethylchlorosilane as starting material,synthesizing a-phosphoramidosilane by alcoholysis reaction,Kabachnik-Fields reaction,quaternization reaction or ammoniation reaction,and then hydrolyzing and condensing to synthesize the corresponding siloxane Double blocking agent.The synthesis method has many advantages such as simple operation,mild conditions,short reaction time,high yield and atomic economy.A quaternary ammonium type siloxane and an a-phosphoramidate ethylenediamine type siloxane double blocking agent were synthesized in the same manner.(4)Design and synthesis of interface modifier based on quaternary ammonium type double-blocked fluoropolysiloxane flooding.The interface of quaternary ammonium double-blocked fluoropolysiloxane flooding was synthesized by ring-opening polymerization using quaternary ammonium siloxane double blocking agent,Da and D3F as reaction materials and tetramethylammonium hydroxide as catalyst.Modifier.An interfacial modifier based on the a-phosphoramidate ethylenediamine type siloxane double-capped polysiloxane flooding was synthesized in the same manner.The synthetic interfacial modifier for oil displacement has a'"three-proof'effect due to the introduction of siloxane and fluorosilicone compared with the conventional oil-displacing agent;at the same time,the introduced phosphate group enhances the flooding.Biodegradability and compatibility of oil modifier modifier molecules.(5)Basic application research based on interfacial modifier for quaternary ammonium double-blocked fluoropolysiloxane flooding.The results show that the interface modifier of oil displacement can reach 10-3 mN/m at a lower concentration,the lowest surface tension value is 21.76 mN/m,the cmc value is 85.09 ppm,and there is a certain temperature resistance and salt tolerance.