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A kind of processing method of phenolic oil in coal tar

A technology for coal tar and phenol oil, applied in the petroleum industry, processing hydrocarbon oil and other directions, can solve problems such as increasing the burden on enterprises, and achieve the effects of avoiding hidden dangers of environmental protection, improving octane number and avoiding cost increase

Active Publication Date: 2018-05-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a dephenolization process will produce a large amount of waste acid and lye, and a large amount of waste acid and lye needs to be cleaned, which will not only increase the burden on the enterprise, but also pose serious pollution risks

Method used

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  • A kind of processing method of phenolic oil in coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Preparation of catalyst

[0055] Add 20 grams of spherical SiO to an aqueous solution containing 3.87 grams of cesium acetate (21.6% by weight concentration) 2 Particles (particle size in the range of 1-3mm, most probable pore size is 10.5nm, pore volume is 0.75mL / g, specific surface area is 200m 2 / g), and stirred at room temperature for 0.5 hours. Then, the impregnated mixture was dried in the air at room temperature, dried in an oven at 120° C. for 12 hours, and then fired in an air atmosphere at a temperature of 500° C. in a muffle furnace for 12 hours. After calculation, the content of Cs in the catalyst is 11.8% by weight.

[0056] (2) Pack 10 mL of the catalyst obtained in step (1) into a miniature fixed-bed reactor to form a catalyst bed. Methanol and phenol-containing oil are mixed at a volume ratio of 1.1 (the molar ratio of methanol to phenol-containing oil is about 5:1), and then pumped into the reactor for etherification. Among them, the reaction te...

Embodiment 2

[0058] (1) The catalyst is prepared in the same manner as in Example 1, except that 20 grams of spherical SiO are added to an aqueous solution (concentration of 12.2% by weight) containing 1.94 grams of cesium acetate 2 Particle (with embodiment 1), thereby obtains catalyst. After calculation, the theoretical content of cesium is 6.3% by weight.

[0059] (2) The etherification reaction is carried out in the same manner as in step (2) of embodiment 1, except that the etherification catalyst is the catalyst prepared in step (1) of embodiment 2. It was determined that the yield of high-octane components was 59.4%.

Embodiment 3

[0061] Adopt the method identical with embodiment 2 to prepare catalyst and carry out etherification reaction, difference is, in step (2), methyl alcohol and phenol-containing oil are by volume ratio 0.66 (the mol ratio of phenol in methyl alcohol and phenol-containing oil is about 3: 1) mix. It was determined that the yield of high-octane components was 45.1%.

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Abstract

The invention provides a method for processing phenol-containing oil in coal tar. The method comprises the following steps: fractioning and cutting coal tar to obtain a phenol-containing oil fraction with the boiling range from an initial boiling point to 220DEG C and other fractions with the distillation temperature being greater than 220DEG C; allowing the phenol-containing oil fraction and at least one alcohol to be in contact with an etherification catalyst under etherification reaction conditions to obtain an ether-containing mixture; and removing alcohol in the ether-containing mixture to obtain etherified oil. The etherified oil obtained through the method has high octane number, and is suitable for being used as a gasoline blending component to improve the octane number of the gasoline. Extraction of the phenol-containing oil is not needed by the method in the invention, so the problems of increased cost and hidden environmental protection trouble caused by generation of a large amount of waste acid solutions and waste alkali solutions of present phenol-containing oil dephenolization quality improvement methods are avoided. The method can simultaneously realize increase of the added values of the phenol-containing oil and clean utilization of the phenol-containing oil.

Description

technical field [0001] The invention relates to a method for processing phenolic oil in coal tar. Background technique [0002] The volatile components produced in the coal pyrolysis process include coke oven gas and coal tar volatilized at the pyrolysis temperature. The volatile components are divided into coke oven gas and coal tar components through the quenching process, and the coal tar can be further Subdivided in the secondary fractionation tower, among them, the fraction equivalent to the boiling point of kerosene is generally called phenol-containing oil, which is characterized by containing a large amount of monohydric phenol. [0003] Since phenolic oil contains a large amount of monohydric phenol, if the phenolic oil is subjected to hydrogenation treatment, on the one hand, the phenol will be deoxidized and converted, resulting in a decrease in value, and at the same time, the hydrogen consumption in the hydrogenation process will be greatly increased (the oxygen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G57/00
Inventor 邓甜音郭小汾陈松王理
Owner CHNA ENERGY INVESTMENT CORP LTD