Method for removing alkali-nitrogen compound from poor wax oil by complex extraction

A low-quality wax oil and extraction agent technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low alkali nitrogen removal rate and low raffinate yield, and achieve low solvent loss and raffinate yield. The effect of high efficiency and small ratio of agent to oil

Inactive Publication Date: 2004-01-28

EAST CHINA UNIV OF SCI & TECH

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Problems solved by technology

No matter be single-solvent extraction method or double-solvent extraction method, because the solvent that it uses mainly is made up of furfural or N-methyl...

Abstract

The present invention discloses a solvent method for upgrading low-grade wax oil, which uses organic acid, water soluble high molecular or/and water as extraction agent, in the range of that the ratio of solvent and oil is 5:0.01-1 and the temp. is 30-110 deg.C the low-grade wax oil can be extracted, the reffinate oil yield can be up to above 95%, the alkali nitrogen removed rate can be up to above 95% and the solvent recovery rate is up to above 99%, and the cover wax oil obtained by said invented process has low alkali nitrogen content, and is suitable for catalytic cracking raw material.

Application Domain

Hydrocarbon oils refining

Technology Topic

WaxSolvent +7

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Examples

Experimental program(3)

Example Embodiment

[0017] Example 1

[0018] The properties of inferior oil from a certain factory are shown in Table 1. Using the solvent refining method of the present invention, 88 (weight)% acetic acid, 7% (weight) methanol and 5% (weight) polyethylene glycol are used as the extractant. The volume ratio of the oil is 1:5, and the extraction and refining are carried out under the operating conditions of the extraction temperature of 50°C. The results are shown in Table 2.

Example Embodiment

[0019] Example 2

[0020] The properties of inferior oil from a certain factory are shown in Table 1. Using the solvent refining method of the present invention, 88 (weight)% acetic acid, 7% (weight) methanol and 5% (weight) polyethylene glycol are used as the extractant. The volume ratio of the oil is 1:1, and the extraction and refining are carried out under the operating conditions of the extraction temperature of 65°C. The results are shown in Table 2.

[0021] Table 1 Properties of inferior oil from a factory

[0022] Raw oil CGO density (20℃), g·cm -3 0.9127 distillation range, ℃

[0023] IBP/10% 226/360

[0024] 30%/50% 397/414

[0025] 70%/90% 433/472

[0026] 95%/EBP 506/541S, wt% 1.82N, wt% 0.4398C, wt% 86.65H, wt% 11.83 basic nitrogen, ug·g -1 1126

[0027] Table 2

Example Embodiment

[0028] Example 1 Example 2 Furfural NMP raffinate alkali nitrogen content, ug/g 50 54 476 654 alkali nitrogen removal rate,% 95.58 95.2 57.9 42.2 raffinate oil yield,% 97.3 96.7 79.6 73.6 acetic acid recovery rate,% 99.2 98.9- -

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Method for removing alkali-nitrogen compound from poor wax oil by complex extraction

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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