Efficient diesel decoloring agent

Abstract

The invention relates to an efficient diesel oil decolorant, which consists of sulfuric acid and formaldehyde and is prepared at normal temperature and pressure according to proportion sequentially. The diesel oil decolorant has the advantages of no three wastes pollution, low cost, easily obtained raw materials, simple process and convenient use. The diesel oil decolorant can decolorize the oxidized black diesel oil which is generated in the process of oil refining through the catalytic cracking and coking of waste engine oil and waste rubber, and the chromaticity reaches the national standard.

Description

technical field [0001] The invention relates to a high-efficiency oil decolorizer, which belongs to petrochemical products. Background technique [0002] Diesel produced by small and medium-sized oil refineries through catalytic cracking and coking contains a large amount of heterocyclic compounds of sulfur, nitrogen and oxygen, olefin compounds and phenolic substances, which makes the stability of diesel oil poor. Discoloration, turbidity, and a large amount of colloid and sediment, non-hydrocarbon compounds, especially non-basic oxides, such as pyrrole, tetraoxycarbazole, etc. are very unstable, and are easily oxidized into peroxides and cause hydrocarbon oxidation. When non-alkaline oxides coexist, lins have an oxidation catalytic effect, which can accelerate the formation of oxides and the oxidation of hydrocarbons. These reactions not only deepen the color of diesel oil and affect the use value of oil products, but also accompany them in oil products. A large amount of...

AI Technical Summary

Problems solved by technology

[0002] Diesel produced by small and medium-sized oil refineries through catalytic cracking and coking contains a large amount of heterocyclic compounds of sulfur, nitrogen and oxygen, olefin compounds and phenolic substances, which makes the stability of diesel oil poor. Discoloration, turbidity, and a large amount of colloid and sediment, non-hydrocarbon compounds, especially non-basic oxides, such as pyrrole, tetraoxycarbazole, etc. are very unstable, and are easily oxidized into peroxides and cause hydrocarbon oxidation. When non-alkaline oxides coexist, lins have an oxidation catalytic effect, which can accelerate the formation of oxides and the oxidation of hydrocarbons. These reactions not only deepen the color of diesel oil and affect the use value of oil products, but also accompany them in oil products. A large amount of black insoluble colloidal deposits are produced, causing blockage of the fuel supply pipeline and affecting normal fuel supply. This kind of fuel combustion forms carbon deposits on the engine nozzle, which aggravates engine wear and causes nozzle blockage

[0003] The existing method to solve the decolorization of oxidized and blackened diesel oil is to add industrial sulfuric acid to stir, and then add sodium hydroxide to neutralize or add activated clay to absorb after reaction and precipitation. reduction

Currently disclosed CN1058038A and CN1279269A can only process catalytic diesel oil, but cannot process other diesel oil such as coking diesel oil, thermally cracked diesel oil and finished diesel oil containing more oxidized insolubles and colloids

These disclosed patent methods are deficient: 1. only adapt to catalytic diesel oil, coking diesel oil, washing oil, thermal cracking diesel oil, black diesel oil oxidized during waste engine oil and waste rubber refining are invalid

②The decolorization process is complicated, the addition amount is large, and the cost is high

③There is a lot of slag, reaching 5-10%, unstable and easy to restore

Therefore, the above-mentioned patents cannot actually be popularized and applied.