Pour point depressant of high wax content oil and preparation method of pour point depressant

Abstract

The invention discloses a pour point depressant of high wax content oil. The pour point depressant is formed through ternary polymerization of maleic anhydride, acrylic amide and methacrylic high alcohol, comprising the following steps that the maleic anhydride and methylbenzene are added into a four-neck flask, nitrogen is introduced to replace oxygen in a reactor, heating is conducted, the acrylic amide and the methacrylic high alcohol are added dropwise, meanwhile, a methylbenzene solution of an initiating agent benzoyl peroxide is added dropwise, the flow rate is controlled until dropwiseadding is completed, and after constant-temperature reaction, reduced pressure distillation is conducted to remove a solvent, so that a solution A is obtained; the solution A and tetracosanol are added to a three-neck flask containing methylbenzene and hydroquinone, and after heating and stirring are conducted until the reactants are completely dissolved, a catalyst p-toluenesulfonic acid is added; pressure distillation is conducted to remove the solvent methylbenzene, so that a product B is obtained; for the product B, firstly, a 5% sodium carbonate solution is used for neutralizing residualacid, then the product B is washed to be neutral, and finally, the product B is subjected to vacuum drying to constant weight, so that the pour point depressant of the high wax content oil is obtained. The pour point depressant of the high wax content oil has a good pour point depression effect, and the pour point depression magnitude reaches 10 DEG C or above.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, in particular to a chemical treatment agent for crude oil, in particular to a pour point depressant for high waxy crude oil and a preparation method thereof. Background technique [0002] According to the year-end statistics of the world's proven oil reserves published by the American "Oil and Gas Journal" in 2012, as of December 2012, the estimated global proven oil reserves were about 224.364 billion tons. According to the analysis of the latest report of British Petroleum (BP), according to At the current global oil consumption level, the world's oil static guarantee period is less than 40 years. [0003] China has become a net importer of oil since 1993, and its annual demand for oil has grown at an average rate of 8% since then. In 2003, it became the second largest oil consumer in the world after the United States, and its oil consumption continued to rise. The contradict...

AI Technical Summary

Problems solved by technology

But the process also has many disadvantages: (1) the fuel consumption is large; (2) once the pipeline stops for some reason, it cannot continue to add heat to the crude oil, and the pipeline is in danger of "condensation pipe"; (3) the middle Large investment in heating station

Although researches on pour point depressants have been active in various countries in recent years, they are relatively single in nature, and there are few reports on pour point depressants for crude oil with a freezing point higher than 40°C.