Non-hydrogenation refining method for coking waxy oil

Abstract

The invention relates to a non-hydrogenation refining method for coking waxy oil. The coking waxy oil and a refining agent fully react at normal temperature and normal pressure and then are settled; the upper refined oil serves as a raw material of hydrocracking or catalytic cracking; after the lower removed material and a neutralizing agent react at normal temperature and normal pressure, the product is settled to form heavy oil and aqueous solution; the heavy oil serves as a conditioning component of a fuel oil or an asphalt product and the aqueous solution is recycled or treated as sewage;the refining agent consists of an oxidant and a complexing agent in a volume ratio of 1:0.25-1:5; the volume ratio of the refining agent to the coking waxy oil is 0.1 to 5 percent; the mass ratio of the neutralizing agent to the removed material is 2 to 25 percent; the stirring speed is controlled to be between 300 and 1,000r/m; the added water amount is controlled to be between 1 and 30 percent of the mass of the removed material; the refined coking waxy oil serves as the raw material of hydrocracking or catalytic cracking; the heavy oil serves as the conditioning component of the fuel oil or the asphalt; and the aqueous solution is recycled or treated as the sewage.

Description

technical field [0001] The invention relates to a coker wax oil non-hydrogenation refining method related to the coker wax oil pretreatment. Background technique [0002] Coker gas oil (CGO) is the main product of delayed coking. At present, most refineries with coking units mix coker gas oil with catalytic cracking or hydrocracking feedstock, which reduces the light oil yield of the unit. This is not only because of the colloid and asphaltenes in the coker wax oil itself, which are difficult to crack, but more importantly, the nitrogen-containing compounds in the coker wax oil will reduce the activity of the catalyst, resulting in a decrease in the yield of light oil and an increase in coke formation rate, etc. adverse consequences. Moreover, with the increase of the nitrogen content in the raw material, the conversion rate of the catalytic cracking raw material or the hydrocracking raw material and the gasoline yield all decrease obviously, seriously affecting the economi...

AI Technical Summary

Problems solved by technology

However, due to factors such as hydrogen production equipment investment and operating costs, it is difficult for small and medium-sized refineries to adopt hydrorefining technology

In recent years, many people have studied non-hydrogenation methods. CN1563284, US2002035306, and US004035753 disclose a method for treating coker wax oil using oxidants, transition metal oxides, and organic or inorganic acid catalysts. CN101144031, CN1470606, and US4985139 (A) disclose A kind of method that adopts complexing agent and solvent to process

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