Method for treating oil sand by using composite extractant

A compound extractant and extraction technology, which is used in the treatment of hydrocarbon oil, the preparation of liquid hydrocarbon mixtures, the petroleum industry, etc., can solve the problems of insufficient oil sand treatment, increased unsafe factors, increased solvent loss rate, etc., and reaches the scope of use. The effect of wide, thorough extraction and less usage

Active Publication Date: 2015-03-25
PETROCHINA CO LTD
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  • Abstract
  • Description
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Problems solved by technology

These solvents have a certain effect on the extraction of oil sands, but the solvent boiling range is too wide, including light oil products with low boiling range (such as below 80 °C), and this part of light hydrocarbons is used in the process of solvent extraction, regeneration and recycling. The solvent is more volatile, resulting in an increase in the loss rate of the solvent. At the same time, a large amount of volatile combustible gas exists, which brings greater safety hazards to the production process of the device; the solvent also contains hydrocarbons with a higher boiling range (such as higher than 200 ° C) Substances, the temperature required in the solvent regeneration process is high, which increases the energy consumption of the device and also increases the unsafe factors in the regeneration process
In addition, some patent documents are also related to oil sand treatment, but the oil sand treatment technology involved in these patent documents has the disadvantages of high energy consumption, complicated process flow, harsh operating conditions or insufficient oil sand treatment. place

Method used

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  • Method for treating oil sand by using composite extractant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The solvent formula is as follows: distillate oil with a boiling range of 80-130°C is selected as the main agent, accounting for 90% (v / v), and distillate oil with a boiling range of 160-210°C is used as an auxiliary agent, accounting for 10% (v / v). / v) to form a compound extractant. Take 1kg of oil sand, grind it, mix it with a mixed solvent at a mass ratio of 1:8, and extract for 30 minutes. The extraction temperature is 30°C. The oil sand and the mixed solvent are mixed and extracted for 30 minutes at a mass ratio of 1:8, and the extraction temperature is 60°C. After the extraction is completed, the solid-liquid mixture is sent to a centrifugal separator, and the separated liquid phase enters the solvent regeneration tower. Recycling, heavy oil products are extracted from the bottom of the tower; the separated solid phase enters the dry distillation equipment, and at a temperature of 210 °C and a pressure of 60kpa (absolute pressure), the solid waste residue is obtai...

Embodiment 2

[0043] The solvent formula is as follows: distillate oil with a boiling range of naphtha at a boiling range of 90-120°C is used as the main agent, accounting for 80% (v / v), and distillate oil with a boiling range of 170-200°C is selected as an auxiliary agent, accounting for 20% (v / v). / v) to form a compound extractant. Take 1kg of oil sand, grind it, mix it with a mixed solvent at a mass ratio of 1:5, and extract for 30 minutes. The extraction temperature is 40°C. The oil sand and the mixed solvent are mixed and extracted for 30 minutes at a mass ratio of 1:10. The extraction temperature is 70°C. After the extraction is completed, the solid-liquid mixture is sent to a centrifugal separator, and the separated liquid phase enters the solvent regeneration tower. Recycling, heavy oil products are extracted from the bottom of the tower; the separated solid phase enters the carbonization equipment, and at a temperature of 210 ° C and a pressure of 60 kpa (absolute pressure), the so...

Embodiment 3

[0047] The solvent formula is as follows: distillate oil with a boiling range of naphtha in the boiling range of 90-120°C is used as the main agent, accounting for 70% (v / v), and distillate oil with a boiling range of 170-200°C is selected as the auxiliary agent, accounting for 30% (v / v). / v) to form a compound extractant. Take 1kg of oil sand, grind it, mix it with a mixed solvent at a mass ratio of 1:2, and extract for 30 minutes. The extraction temperature is 40°C. The oil sand and the mixed solvent are mixed and extracted for 40 minutes according to the mass ratio of 1:1. The extraction temperature is 70°C. After the extraction is completed, the solid-liquid mixture is sent to the centrifugal separator, and the separated liquid phase enters the solvent regeneration tower. Recycling, heavy oil products are extracted from the bottom of the tower; the separated solid phase enters the carbonization equipment, and at a temperature of 210 ° C and a pressure of 60 kpa (absolute p...

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Abstract

The invention relates to a method for treating oil sand by using a composite extractant, particularly an extraction method for treating natural oil sand by using a composite extractant. The method provided by the invention is as below: breaking oil sands under different temperature conditions, extracting twice, conducting centrifugal separation on the material after extraction, conducting solvent regeneration on a separated liquid phase and recovering a thickened oil product, conducting destructive distillation on the separated solid phase under certain temperature, and condensing the gas phase from destructive distillation as an extraction agent, wherein the content of oil substances in the residue after destructive distillation is less than 0.3%, so as to achieve standard reached discharge. The invention has the main characteristics of high extraction efficiency, short process device and low equipment investment.

Description

technical field [0001] The invention relates to an extraction treatment method of oil sands. After the oil sands are extracted and treated, resource utilization of the oil sands is realized. Background technique [0002] In 2008, the world's proven oil reserves were 170.8 billion tons. According to the current production rate, the global proven oil reserves can be exploited for 42 years. Conventional oil resources can no longer meet the rapid growth of oil demand, so we turn our attention to unconventional oil resources. As an unconventional oil resource, oil sand accounts for about 30% of the world's oil reserves. If all of it is exploited and utilized, according to the current world energy demand level, it can be consumed by the world for hundreds of years. The development and utilization of oil sand become a new economic growth point. According to the statistics of major oil sand resource countries, the world's proven oil sand resources are about 3.8 trillion barrels. M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/04
CPCC10G1/04C10G2300/44
Inventor 杨岳刘光利李常青巫树锋梁宝锋江岩曹凤霞王立蓉王军牛进龙文善雄
Owner PETROCHINA CO LTD
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