Continuous sedimentation full-range urea dewaxing method of wax-bearing oil

A urea dewaxing and full fraction technology, which is applied in the petroleum industry, petroleum wax recovery, mineral wax recovery/refining, etc., to achieve good dewaxing effect, strong equipment coordination, and easy operation and control.

Active Publication Date: 2011-09-14
HULUDAO DESIGN INST PETROCHINA NORTHEAST REFINING & CHEM ENG
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  • Abstract
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Problems solved by technology

[0012] In order to overcome the shortcomings of the existing molecular sieve dewaxing and ball-forming urea d

Method used

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  • Continuous sedimentation full-range urea dewaxing method of wax-bearing oil
  • Continuous sedimentation full-range urea dewaxing method of wax-bearing oil
  • Continuous sedimentation full-range urea dewaxing method of wax-bearing oil

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Experimental program
Comparison scheme
Effect test

Embodiment

[0043] The dewaxing process includes complexation reaction, complex sedimentation washing, complex decomposition, solvent separation and recovery and distillation unit composition.

[0044] The rotary scraper type pipeline complexation reactor is adopted to solve the problem of the complex compound blocking the pipeline and hindering the export of reaction heat, and realizes the slow stirring gravity sedimentation separation process of the complex compound and the multi-stage countercurrent washing refining process of solvent oil.

[0045] The actual operation test shows that compared with the isopropanol dewaxing process, the process flow is continuously simplified by using the continuous dewaxing method of full-fraction urea dewaxing by sedimentation method, from the initial 17 units to 12 units; the energy consumption of the device is continuously reduced, by The initial 374KgEo / t feedstock oil is reduced to 120KgEo / t feedstock oil; material consumption is continuously reduc...

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Abstract

The invention relates to a continuous sedimentation full-range urea dewaxing method of wax-bearing oil. The wax-bearing oil is subjected to complex reaction 1, complex sedimentation washing 2, complex decomposition 3, solvent separation recycling 4 and distillation 5, and thus waxiness is removed. By adopting the continuous sedimentation full-range urea dewaxing method, waxiness can be removed from raw material wax-bearing oil by virtue of continuous steps. The method has the characteristics of strong equipment coordination, short flow, good dewaxing effect, comprehensive energy saving and easiness in operation and control and is applicable to a process for removing the waxiness from the wax-bearing oil in the field of petroleum product processing.

Description

technical field [0001] The invention relates to a dewaxing technology in oil products in the field of petroleum refining, in particular to a method for dewaxing waxy oil with continuous sedimentation of whole-fraction urea. Background technique [0002] At present, there are two main processes for producing low freezing point diesel and liquid paraffin at home and abroad: [0003] A. Molecular sieve dewaxing [0004] Molecular sieve dewaxing is a liquid paraffin production process developed in the late 1960s. Liquid paraffin is liquid at room temperature, carbon atoms range in C 6 ~C 27 , high-purity normal paraffin products with a molecular weight of 86-380. This process uses the selective adsorption performance of 5A molecular sieve to separate n-alkanes from kerosene or diesel fractions in industry to obtain high-purity n-alkanes. This process was mainly used to increase the octane number of gasoline in the early days. Later, in order to obtain the co-produced normal...

Claims

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Application Information

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IPC IPC(8): C10G73/02C10G73/24
Inventor 朱燕玲张宏利吴铁竹顾锦鸿
Owner HULUDAO DESIGN INST PETROCHINA NORTHEAST REFINING & CHEM ENG
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