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Oil sand separation method

A separation method and oil sand technology are applied in the petroleum industry, the preparation of liquid hydrocarbon mixtures, etc., which can solve problems such as asphalt residue, and achieve the effects of low production cost and short construction period.

Active Publication Date: 2020-10-16
凌港
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a separation method for the industrial production of oil sands, which solves the bottleneck problem in the industrial production process of oil sand extraction, through specific compounding Solvents and process parameters are used to treat oil sands. The extraction rate of asphalt oil in oil sands is over 97%. In the separated tailings, 0.33-0.85% of asphalt remains

Method used

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Embodiment 1

[0032] The oil sand separation method of this embodiment, the flow process is as follows figure 2 , including the following steps:

[0033] (1) Oil sand raw materials include minerals such as natural asphalt, sand and clay, water, and asphalt oil content of 22.54% (Indonesian oil sands); oil sand raw materials are transported to a pulverizer by a conveyor, and crushed to particles with a particle size of less than 10mm; Then it is transported to the dryer by the conveyor, and after drying and dehydration at 50-65°C, it is transported to the extractor by the conveyor.

[0034] (2) The oil sand is extracted by the composite solvent in the extractor. The composite solvent is placed in the solvent circulation tank, and after being extracted from the solvent circulation tank by the solvent pump, it enters the extractor through the solvent inlet; the use of the composite solvent The amount is 0.5 wt.% of the weight of the oil sands feedstock. The temperature of the extraction tre...

Embodiment 2

[0038] The difference from Example 1 is:

[0039] The composition of the composite solvent is: No. 120 mineral spirits 60wt.%, petroleum ether 24.5wt.%, n-heptane 15.5wt.%.

[0040] According to the operation steps of Example 1, after the oil sand raw materials are separated and extracted, the extraction rate of bitumen in the oil sand is over 98.67%.

[0041] In the separated sand and stone, 0.3% of asphalt remains.

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Abstract

The invention discloses an oil sand separation method, and belongs to the technical field of oil sand separation. The oil sand separation method comprises following steps: an oil sand raw material issubjected to crushing and drying, and is introduced into an extractor; the oil sand raw material is subjected to extraction using a composite solvent in the extractor so as to obtain an asphalt and composite solvent mixed oil through separation; the asphalt and composite solvent mixed oil is pumped into a filter, impurities are removed, and the asphalt and composite solvent mixed oil is pumped into a distillation still for evaporation so as to obtain asphalt oil, and the asphalt oil is pumped into an asphalt tank; the composite solvent gas is converted into liquid through condensation for recycling; a mixed material obtained in the extractor is heated to 90 to 130 DEG C, the vacuum degree is controlled to be 2 to 3KPa, stirring is carried out, the composite solvent in tailings is convertedinto gas state for discharging, the composite solvent gas is subjected to condensation so as to obtain a liquid for recycling, and tailings output is carried out. According to the oil sand separationprocess, the specific composite solvent and technological parameters are adopted for processing of oil sand, the asphalt extraction rate in oil sand is 97% or higher, and asphalt left in the tailingsis low.

Description

technical field [0001] The invention relates to the technical field of oil sand separation, in particular to an oil sand separation method. Background technique [0002] Oil sands refer to sedimentary sands rich in natural bitumen, hence the name "tar sands". Oil sand is essentially a mixture of asphalt, sand, rich ore clay and water, in which the content of asphalt is 10-16% (Canada) or 22.54-33.72% (Indonesia), and minerals such as sand and clay account for 60-85%. The rest is water. [0003] my country is one of the countries rich in oil sand resources in the world, ranking fifth in the world. It is preliminarily estimated that there are 100 billion tons of oil sands in China, and about 10 billion tons of recoverable oil resources. Mainly distributed in Xinjiang, Qinghai, Tibet, Sichuan, Guizhou. In addition, Guangxi, Zhejiang, and Inner Mongolia are also distributed. my country's oil sand prospect resources are 10 billion tons, and it is estimated that by 2050, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
CPCC10G1/00
Inventor 凌港凌雨赋赵兴元欧阳子文
Owner 凌港
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