Chemical refining process of eliminating unsoluble oxides and gum from diesel oil

A chemical refining and diesel oil technology, applied in the direction of refining with alkaline aqueous solution, refining with acidic salt, refining with acidic liquid, etc., can solve the problems of inability to handle, large investment cost, high processing cost, etc., and achieve no industrial pollution, The effect of less investment and simple process

Inactive Publication Date: 2003-03-19
DALIAN UNIV OF TECH
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Problems solved by technology

For this reason, the above-mentioned diesel oil generally adopts hydrorefining technology, that is, removes sulfur, nitrogen, oxygen, heterocyclic compounds and phenolic compounds under harsh conditions, and at the same time saturates olefins to improve the storage stability of diesel oil. The effect is good, but the one-time investment cost is large and the processing cost is high
[0003] Currently disclosed CN1058038A, CN1287149A 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 total insolubles and colloids

Method used

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Examples

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Embodiment

[0011] Application concentration is 35% liquid sodium hydroxide and sodium thiosulfate and tetraethylammonium hydroxide are mixed by 1000: 2: 1 (weight ratio) to make compound chemical refining reagent, following example all adopts the compound of this ratio Chemically refined reagents for experiments.

[0012] Take 1000ml of catalytic diesel oil from a petrochemical branch company and pour it into a beaker, heat it to 60°C, add 1.67ml of compound chemical refining reagent, stir for 8 minutes, settle for 2 hours, separate the upper layer of diesel from the lower layer of reactants and the remaining reagents, and take the refined Before and after the diesel oil was analyzed, the results are shown in Table 1 and Table 2.

[0013] Table 1. Indexes before and after chemical refining treatment of the second catalyst diesel oil (oil ratio 600:1)

[0014] Item Before processing After processing

[0015] Colloid mg / 100ml 248 23

[0016] Oxidation sediment mg / 100ml 10.54 0...

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Abstract

The present invention belongs to the field of petrochemical technology and relates to the chemical refining of petroleum product. The said refining process is to refine chemical catalystic cracking diesel oil with insoluble oxides and gum and to make the refined diesel oil maintain unchanged colority in long term. In the refining process, composite chemical reagent comprising inorganic alkali solution, thiosulfate and quarternary ammonium salt or quarternary ammonium base surfactant in certain proportion is fixed and reacted with diesel oil; and after depositing for certain time, the bottom mixed liquid is separated to complete the refining. The said process is simpler than hydrogenation process and has low cost, high diesel oil yield and no industrial pollution.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for chemically refining petroleum products, in particular to a method for chemically refining diesel oil containing more oxidized total insolubles and colloids such as catalytic cracking. Background technique [0002] Diesel oil produced by petroleum refining, especially diesel produced by catalytic cracking, coking, thermal cracking, etc., contains more sulfur, nitrogen, oxygen heterocyclic compounds, olefin compounds and phenolic substances. The existence of the above substances makes the The stability of diesel is greatly reduced. Due to the poor stability of diesel oil, it will become discolored, cloudy and generate a lot of sediment after being left for a period of time. Vehicles burning this type of diesel will clog the filter system, cause fuel system failure, and cause air pollution due to poor combustion effect. As the storage time of this kind of diesel inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G17/06C10G17/09C10G19/02
Inventor 肖光王正
Owner DALIAN UNIV OF TECH
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