Method for removing phenoxy compounds in solvent oil

A technology for removing solvents and compounds, applied in the direction of refining with an alkaline aqueous solution, can solve the problems of harsh process conditions, high equipment requirements, high construction investment and production costs, and achieve simple process flow, high activity, and low production costs. Effect

Active Publication Date: 2013-04-24
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of high liquid yield and non-toxic and harmless oil, but its process conditions are harsh, equipment requirements are high, construction investment and production costs are high, and hydrogen resources are required, which is difficult for ordinary enterprises to realize.

Method used

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  • Method for removing phenoxy compounds in solvent oil
  • Method for removing phenoxy compounds in solvent oil

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1. The method of the present invention is used to remove phenolic oxygen compounds from solvent oil whose distillation range is 120° C. to 150° C. and whose content of phenolic oxygen compounds is 87 ppm. The schematic diagram of the process flow is as attached figure 2 As shown, 6 is a baffled tubular oil-alkali mixing reactor with oblique corrugated plates inside; 7 is a pre-dephenolization reactor with wire mesh packing on the upper layer and oblique corrugated packing on the lower layer, and the height ratio of the upper and lower layers of packing is 1:1.2. And the oil-water settling tank, the specification model is φ1500×5000; 8 is the hydrocyclone, the specification model is φ1600×4000; 9 is the coalescence high-efficiency dehydrator, the model is 4AQL1650CH19P3-CC7027; 10 is the fixed bed reactor, the specification model It is φ1000×6000, filled with high-efficiency adsorbent. The active component of the adsorbent is the ionic salts of certain metals...

Embodiment 2

[0030] Embodiment 2, for the solvent oil whose distillation range range is 120~150°C and phenolic oxygen compound content is 68ppm, the processing capacity is 15t / h, the reaction temperature is 50°C, and the reaction pressure is 0.4MPa, and other conditions are the same as in Example 1. The phenolic oxygen compound content of the product solvent oil obtained at the distillation outlet of the refined dephenolization fixed-bed reactor (10) is below 3.8ppm, and the product is colorless and odorless. It is tested according to the method of GB / T 3555, and the characteristic number of Saibo is not less than + 30.

Embodiment 3

[0031] Embodiment 3, for the solvent oil whose distillation range range is 120~150°C and phenolic oxygen compound content is 64ppm, the processing capacity is 13t / h, the reaction temperature is 40°C, the reaction pressure is 0.2MPa, the alkali concentration is 5%, add The amount is 30%, and other conditions are the same as embodiment 1, and the phenolic oxygen compound content of the product solvent oil obtained at the distillation outlet of the fine dephenolization fixed-bed reactor (10) is below 1.0ppm, and the product is colorless and tasteless, according to GB / T 3555 Method for detection, Saibo characteristic number is not less than +30.

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Abstract

The invention provides a method for removing phenoxy compounds in solvent oil, which comprises the following steps: adding the solvent oil and NaOH solution into an oil-alkali mixing reactor for mixing and pre-reaction; entering a pre-dephenolizing and oil-water sedimentation tank, removing a great deal of phenol in the solvent oil, completing the initial separation of alkali water and products generated by the reaction of the solvent oil, the phenoxy compounds and alkali, and performing dehydration on the upper layer of solvent oil by a liquid hydrocyclone and an accretion type high-efficiency dehydrator in turn; and entering a fine-dephenolizing fixed bed reactor from the bottom up to further remove the phenoxy compounds in the solvent oil. The method can remove the phenoxy compounds inthe solvent oil to less than 10ppm.

Description

technical field [0001] The invention relates to a method for removing phenolic oxygen compounds in solvent oil. technical background [0002] Phenols have a special pungent smell, and the hydroxyl group in the phenolic structure is directly connected to the benzene ring, which has a strong impact on the chemical properties of the benzene ring, so that the phenol can undergo oxidation reactions, and the oxygen in the air can also make Phenol oxidation turns red or brown. When the phenol content in mineral spirits is high, the oil has a pungent odor and unstable color. Generally, there is only a small amount of C in crude oil 0 ~C 3 The content of phenolic compounds, namely phenol, cresol and ethyl phenol, is only zero to dozens of ppm, and they are distributed in various distillation range oils such as naphtha, kerosene, diesel and heavy oil according to the boiling point. However, if the crude oil processing process, the water injection of the electric desalination of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G19/02
Inventor 潘罗其袁红星余卫勋杜建文
Owner CHINA PETROCHEMICAL CORP
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