Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF1 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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-methylpyrrolidone and water, they have the common defect that the removal rate of base nitrogen is not high (being 50 -60%) and low raffinate yield (about 70-80%)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing alkali-nitrogen compound from poor wax oil by complex extraction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The inferior oil properties of a certain factory are shown in Table 1. Using the solvent refining method of the present invention, 88 (weight)% acetic acid, 7% (weight) methyl alcohol and 5% (weight) Polyethylene Glycol are extractants, and the extractants are mixed with inferior oils. The volume ratio of the oil was 1:5, and the extraction and refining were carried out under the operating conditions of the extraction temperature of 50°C. The results are shown in Table 2.

Embodiment 2

[0020] The inferior oil properties of a certain factory are shown in Table 1. Using the solvent refining method of the present invention, 88 (weight)% of acetic acid, 7% (weight) methyl alcohol and 5% (weight) polyethylene glycol are used as extraction agents, and the extraction agent and the inferior oil The volume ratio of the oil was 1:1, and the extraction and refining were 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 low-quality oil in a plant

[0022] Raw oil CGO density (20°C), 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 base nitrogen, ug g -1 1126

[0027] Table 2

example 1

[0028] Example 1 Example 2 Furfural NMP raffinate base nitrogen content, ug / g 50 54 476 654 base 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 - -

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

Description

technical field [0001] The invention relates to an improved method for refining inferior wax oil, in particular to an improved method for refining inferior wax oil by solvent extraction. Background technique [0002] Base nitrogen compounds are the main components of catalysts for catalytic cracking, hydrofining and catalytic reforming of poisonous hydrocarbons. In addition, during the storage of oil products, alkali nitrogen compounds will lead to the polymerization of hydrocarbons in the oil products, resulting in darker color, increased viscosity and lower oxidation stability of the finished oil. At the same time, even a very harsh hydrogenation process cannot completely remove nitrogen-containing compounds in oil. Coker gas oil (CGO), the raw material for catalytic cracking blending, has high alkali nitrogen content, which is a typical low-quality gas oil, and is also one of the key factors affecting the cracking performance of mixed feed oil. If the nitrogen content in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10G21/12
Inventor 沈本贤凌昊陈巨星高玉延沈映蕾
Owner EAST CHINA UNIV OF SCI & TECH
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com