Method for refining liquid hydrocarbon

A liquid hydrocarbon and activated carbon technology, applied in the direction of refined hydrocarbon oil, petroleum industry, etc., can solve the problem of unqualified oil stains in the evaporation residue of liquid hydrocarbons, achieve the problem of unqualified evaporation residue and oil stains, easy process and low cost Effect

Active Publication Date: 2010-10-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented method can effectively remove moisture and oil stain impurities in liquid hydrocarbons, and solve the problem of liquid hydrocarbon evaporation residue and unqualified oil stains

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Fill the adsorber with an aspect ratio of 20 with 10-40 mesh granular clay and mm of activated carbon adsorbent. Among them, the index of activated carbon is: the specific surface area is 1002 meters 3 / g, pore volume 0.61 cm 3 / g, ash content 9.09%, strength 96.45%, iodine adsorption value 952 mg / g, methylene blue adsorption value 205 mg / g, carbon tetrachloride adsorption rate 56.22%; the index of granular clay is: specific surface area 180 m 2 / g, crushing strength 0.7N / piece, bulk density 912g / ml.

[0014] At an adsorption temperature of 30°C, an adsorption pressure of 0.3 MPa, and a gravimetric space velocity of 2 hours -1 Under certain conditions, after the liquid hydrocarbons with unqualified residual amount and oil stains pass through the adsorber, the residual amount of liquid hydrocarbons and oil stains are qualified, the removal rate of water and solid impurities is 100%, and the removal rate of oil stains is 92%.

Embodiment 2

[0016] 20-60 mesh granular clay and 6-12 mesh activated carbon adsorbents are filled in the adsorber with a height-to-diameter ratio of 6. Among them, the index of activated carbon is: the specific surface area is 1088 meters 3 / g, pore volume 0.63 cm 3 / g, ash content 4.09%, strength 95.5%, iodine adsorption value 1002 mg / g, methylene blue adsorption value 216 mg / g, carbon tetrachloride adsorption rate 61.5%. ; The index of granular clay is: specific surface area 210 meters 2 / g, crushing strength 0.8N / piece, bulk density 901g / ml.

[0017] At an adsorption temperature of 20°C, an adsorption pressure of 1.7 MPa, and a gravimetric space velocity of 5 hours -1 Under certain conditions, after the liquid hydrocarbons with unqualified residual amount and oil stains pass through the adsorber, the residual amount of liquid hydrocarbons and oil stains are qualified, the removal rate of water and solid impurities is 100%, and the removal rate of oil stains is 91%.

Embodiment 3

[0019] 20-60 mesh granular clay and 6-12 mesh activated carbon adsorbent are filled in the adsorber with aspect ratio of 4. Among them, the index of activated carbon is: the specific surface area is 1300 meters 3 / g, pore volume 0.90 cm 3 / g, ash content 9.16%, strength 95.8%, iodine adsorption value 1080 mg / g, methylene blue adsorption value 263 mg / g, carbon tetrachloride adsorption rate 69.5%. ; The index of granular clay is: specific surface area 210 meters 2 / g, crushing strength 0.8N / piece, bulk density 901g / ml.

[0020] At an adsorption temperature of 20°C, an adsorption pressure of 0.5 MPa, and a gravimetric space velocity of 2 hours -1 Under certain conditions, after the liquid hydrocarbons with unqualified residual amount and oil stains pass through the adsorber, the residual amount of liquid hydrocarbons and oil stains are qualified, the removal rate of water and solid impurities is 100%, and the removal rate of oil stains is 90%.

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Abstract

The invention relates to a method for refining liquid hydrocarbon. In the method, a fixed-bed adsorber is adopted, active carbon and granular clay are used as an adsorbent, the liquid hydrocarbon in the adsorber sequentially passes through an active carbon bed and a granular clay bed of an adsorbent bed, so that oil stains, moisture and other impurities in the liquid hydrocarbon are adsorbed and separated, wherein the adsorption temperature is between 25 below zero and 52 DEG C, the adsorption pressure is between 0.1 and 2.5MPa, and the weight space velocity is between 0.5 and 20h<-1>; the filling height ratio of the granular clay to the active carbon is 0.1 to 5; and the height-diameter ratio of the adsorbent is 3 to 30. By using the method for refining the liquid hydrocarbon, the moisture, oil stains and other impurities in the liquid hydrocarbon can be effectively removed; the problems of evaporation residual quantity and unqualified oil stains of the liquid hydrocarbon are radically solved; and the method has the advantages of simple process, low cost, reproducibility and reusability of the active carbon and the granular clay, no discharge of wastewater and waste alkali liquor, and environmental protection due to the adoption of the fixed-bed adsorber and the active carbon and granular clay composite adsorbent.

Description

technical field [0001] The invention relates to an adsorption and refining method for liquid hydrocarbons under liquid phase conditions. Background technique [0002] Liquid hydrocarbons are by-products of crude oil primary, secondary and tertiary refining processes, and devices such as catalytic cracking, hydrocracking, and delayed coking ethylene crackers are the main sources of liquid hydrocarbons. Liquid hydrocarbons are processed to produce liquefied petroleum gas and chemical raw materials such as propylene, propane and butene. [0003] The quality index of liquid hydrocarbons stipulates: the evaporation residue is not more than 0.05mL / 100mL, and the oil stain observation is passed. Liquid hydrocarbon residues and oil stains are unqualified, which can easily cause safety hazards during the use of liquid hydrocarbons. [0004] The evaporation residues in liquid hydrocarbons are mainly impurities such as moisture, solid particles and oil stains. The oil stains contain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00
Inventor 赵刚朱文军徐文清张四清刘成林周志宏牛豫吴永强谭振明
Owner PETROCHINA CO LTD
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