2results about How to "Improve pour point depressing effect" patented technology

The invention discloses a crude oil pour point depressant which comprises a main agent, an auxiliary agent and a high-flash-point organic solvent, and the mass ratio of the main agent to the auxiliary agent to the high-flash-point organic solvent is (25-35): (1-3): (62-74); wherein the main agent is formed by polymerizing ethylene-vinyl acetate, polyacrylic acid octadecanamide and alkyl maleimide according to a molar ratio of (2.8 to 3.2): (1.8 to 2.2): (1.8 to 2.2); the auxiliary agent is one or any combination of oleic acid diethanolamide, N-oleoyl sarcosine and hydroxy fatty acid; the high-flash-point organic solvent is one or any combination of trimethylbenzene, tetramethylbenzene, propylene glycol butyl ether and diethylene glycol monobutyl ether. The invention also discloses a preparation method and application thereof. The crude oil pour point depressant provided by the invention can effectively reduce the condensation point of high-condensation-point crude oil of which the condensation point is greater than 40 DEG C and improve the fluidity of the high-condensation-point crude oil of which the condensation point is greater than 40 DEG C, so that normal transportation of the crude oil is ensured, and powerful support is provided for reducing the operation cost of the high-condensation-point crude oil and ensuring normal transportation of the crude oil.

This invention discloses a BN@EVA composite pour point depressant and its preparation method, belonging to the petrochemical field. The invention improves the compatibility of nano-hexagonal boron nitride (BN) with ethylene-vinyl acetate copolymer (EVA) by hydroxylation and amination, and then uses a solvent blending method to composite BN-NH2 and EVA in xylene to prepare the BN@EVA pour point depressant. The mass fraction of BN in the composite pour point depressant is 1-3 wt%, with an optimal value of 2 wt%. When the addition amount is 500 mg / kg, the pour point of crude oil can be significantly reduced from 19℃ to -7℃, a reduction of 26℃. FT-IR and SEM characterization confirmed that BN was successfully modified and uniformly dispersed in the EVA matrix; DSC curves showed a decrease in crystallization temperature and a bimodal synergistic effect; microscopic observation showed that the wax crystal morphology changed from a dense network to a dispersed spherical shape, effectively improving low-temperature fluidity. This invention has the advantages of good pour point depressant effect, simple process, and low cost, and is suitable for the extraction and pipeline transportation of high-wax crude oil.