Pretreating method for diesel-fuel of poor quality

A low-quality diesel oil pretreatment technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of inability to remove diesel macromolecule colloids, reduce the service life of filter equipment, and easily block filter screens, so as to reduce bed coking, Easy to operate, simple filter equipment effect

Inactive Publication Date: 2005-09-21
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at overcoming the fact that the raw material processing method in the existing diesel hydrogenation unit cannot remove the macromolecule colloid in the diesel raw material, and it is easy to block the filter screen and reduce the service life of the filter equipment, and proposes a method that can remove the raw material A new method of pretreatment of low-quality diesel oil that can remove mechanical impurities and sediments and other solid substances, and can remove macromolecular colloids

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dilute analytically pure phosphoric acid with distilled water to a concentration of 40w%, immerse 375ml of this solution on 350g of alumina, and treat it at 150°C for 4 hours after drying to prepare an adsorbent with a phosphoric acid content of 30w%. Put 200ml of this adsorbent into a φ20mm adsorption column, add catalytically cracked diesel oil (raw material A) with a sulfur content of 5868 μg / g, a nitrogen content of 1256 μg / g, and an actual colloid content of 435 mg / 100ml into the lower bottle, and take a trickle flow The method is to inject the adsorption column from the upper part, and carry out adsorption and filtration through the adsorbent bed layer. After 8 hours, the feed is stopped, and the heated flue gas is introduced from the lower part for desorption. After 4 hours, the air intake is stopped, and the oil is fed from the upper part to continue the adsorption. After 10 rounds of such cycle operation, stop feeding, then feed flue gas with an oxygen content o...

Embodiment 2

[0029] Dilute analytically pure potassium chloride with distilled water to a concentration of 30w%, immerse 500ml of this solution on 600g of aluminum silicate, and treat it at 200°C for 4 hours after drying to prepare an adsorbent with a potassium chloride content of 20w%. Put 200ml of this adsorbent into a φ20mm adsorption column, add coked diesel oil (raw material B) with a sulfur content of 7646μg / g, a nitrogen content of 1024μg / g, and an actual colloid content of 257mg / 100ml into the lower bottle, and adopt a trickle method Inject the adsorption column from the upper part, and carry out adsorption and filtration through the adsorbent bed layer. After 10 hours, the feeding is stopped, and the heated flue gas is introduced from the lower part for desorption. After 6 hours, the air intake is stopped, and the oil is fed from the upper part to continue the adsorption. After 8 rounds of this cycle operation, stop feeding, then unload the adsorbent, use flue gas with an oxygen co...

Embodiment 3

[0036]Dilute analytically pure sodium hydroxide to a concentration of 25w% with distilled water, soak 800ml of this solution onto 300g of titanium oxide, and treat it at 180°C for 4 hours after drying to prepare an adsorbent with a sodium hydroxide content of 40w%. Put 200ml of this adsorbent into a φ20mm adsorption column, add thermally cracked diesel oil (raw material C) with a sulfur content of 5465μg / g, a nitrogen content of 1312μg / g, and an actual colloid content of 352mg / 100ml into the lower bottle, and take a trickle flow The method is to inject the adsorption column from the upper part, and carry out adsorption and filtration through the adsorbent bed layer. After 6 hours, the feeding is stopped, and the heated flue gas is introduced from the lower part for desorption. After 3 hours, the air intake is stopped, and the oil is fed from the upper part to continue the adsorption. After 12 rounds of this cycle operation, stop feeding, then unload the adsorbent, use flue gas ...

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Abstract

The invention discloses a pretreating method for diesel-fuel of poor quality which comprises contact low grade diesel raw material with adsorbent for adsorption filtration under the condition of adsorption temperature 50-150 deg. C, adsorption volume air rapid 1.0-5.0h-1, contacting desorption agent after adsorbent saturation for desorption, then carrying out coke burning reproduction after multitime of adsorption-desorption of the adsorbent. The adsorbent with polar reclamation can be used repeatedly.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for pretreatment of inferior diesel oil. Background technique [0002] In recent years, the demand for diesel oil in the market has been increasing day by day. my country's crude oil generally has a low yield of light oil, and secondary processed diesel such as catalytic diesel and coking diesel account for a large proportion of diesel. Crude oil is getting heavier day by day, making the quality of secondary processed diesel oil getting worse and worse, so it cannot meet the market demand. With the continuous expansion of domestic heavy oil deep processing capacity and the increasingly stringent requirements of diesel quality in new environmental protection regulations in the world, this problem has become more prominent, which has also objectively promoted the rapid development of diesel hydrogenation technology. [0003] In the hydrogenation process of secondary pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00
Inventor 赵晓青孙殿成霍宏敏
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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