Oil washing agent for carbon dioxide displacement as well as preparation method and application thereof

[0038] Example 1 Cleansing agent 1#

[0039] (1) in N 2 Under protection, 27.6 g of formic acid, 9.0 g of formaldehyde and 8.5 g of 4-penten-1-amine were added to 95 mL of DMF, and refluxed at 95 ° C for 21 h to obtain the first reactant;

[0040] (2) in N 2 Under protection, 34.0g of the first reactant and 10.0g of potassium borohydride were added to 100mL of tetrahydrofuran, and boron trifluoride-ether solution was added dropwise while stirring at 30°C. A total of 20.0g was added dropwise. After the dropwise addition was completed, the reaction After 18 hours, the intermediate product was isolated; after mixing 6.5 g of the intermediate product, 6.0 g of NaOH and 100 mL of ethanol, 60.0 g of a hydrogen peroxide solution with a mass concentration of 30 wt % was added dropwise, and after reflux for 1 h, the second reactant was isolated;

[0041] (3) in N 2 Under protection, 8.0g benzene, 12.0g glutaric anhydride and 0.3g AlCl 3 Added into 50mL of dichloromethane, refluxed at

[0043] Example 2 Cleansing agent 2#

[0044] The difference between embodiment 2 and embodiment 1 is that in step (1), in N 2 Under protection, 27.6 g of formic acid, 9.0 g of formaldehyde and 16.0 g of 3-phenyl-4-penten-1-amine were added to 160 mL of DMF, and refluxed at 95 ° C for 21 h to obtain the first reactant; the remaining conditions were the same as in Example 1 Same, obtain washing oil agent 2#.

[0045] Example 3 Cleansing agent 3#

[0046] The difference between embodiment 3 and embodiment 1 is that in step (3), in N 2 Under protection, 8.0g benzene, 12.0g succinic anhydride and 0.3g AlCl 3Added into 50mL of dichloromethane, and refluxed at 60°C for 24h to obtain the third reactant; other conditions were the same as in Example 1 to obtain oil washing agent 3#.