Polyacrylic acid high-carbon alcohol ester pour point depressant and preparation method thereof

Abstract

The invention provides a polyacrylic acid high-carbon alcohol ester pour point depressant and a preparation method thereof.The preparation method comprises the steps that acrylic acid high-carbon alcohol ester and glyceryl oleate are mixed, vinyl acetate is added into the mixture, then a chain transfer agent is added into the mixture, finally, an organic solvent is added into the mixture, the mixture is stirred to be uniform, and a reaction solution is obtained; placing the reaction liquid under the protection of nitrogen; heating the reaction solution to 60-90 DEG C, dropwise adding an organic solvent solution of an initiator into the reaction solution, and reacting for 6-10 hours to obtain a product A; and mixing the product A with a methylnaphthalene solution, and uniformly stirring to finally obtain the polyacrylic acid high-carbon alcohol ester pour point depressant. The method disclosed by the invention has the characteristics of high monomer conversion rate, small dosage, high paraffin inhibition rate, large pour point depressing amplitude and the like, is safe, reliable and environment-friendly, and has relatively high general applicability.

Description

A kind of polyacrylate higher alcohol ester pour point depressant and preparation method thereof technical field The present invention relates to the technical field of oil and gas water gathering and transportation, more specifically to a kind of polyacrylic acid higher alcohol ester pour point depressant and its preparation method. Background technique The rheology of waxy crude oil can be greatly improved by adding high molecular polymer pour point depressant with specific structure. Therefore, the safety and economy of low-temperature transportation of crude oil pipelines are improved. Polyacrylic acid higher carbon alcohol ester pour point depressant is the current commonly used pour point depressant product, and is also a large international oil company's pour point depressant. The main polymer product selected by the anti-condensing wax agent, this polymer is an oil-soluble high molecular polymer, and its side chain alkyl group can interact with oil. The wax...

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Problems solved by technology

[0006] The present invention overcomes the deficiencies in the prior art. The existing relatively high molecular weight pour point depressant products have unsatisfactory pour point depressant effects on waxy crude oil, and have the problems of small pour point depressant range, low viscosity fall rate, and poor pour point depressant effect. , it is difficult to meet the needs of low-temperature transportation of waxy crude oil, and a polyacrylic acid high-carbon alcohol ester pour point depressant and its preparation method are provided. It has the characteristics of large condensation range, etc., and is safe, reliable, and environmentally friendly, and has strong universal applicability

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