Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for extracting coal tar by using double solvents and application of extracted coal tar

A technology of coal tar and dual solvent is applied in the application field of preparing marine fuel oil, which can solve the problems of large volume of emulsification layer and poor acid reduction effect, and achieve the effect of easy separation

Active Publication Date: 2019-07-16
佛山市光烨环保科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for extracting coal tar using dual solvents and its application, aiming to overcome the defects of large emulsified layer volume and poor acid reduction effect in the existing coal tar extraction method

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 extracting coal tar by using double solvents and application of extracted coal tar
  • Method for extracting coal tar by using double solvents and application of extracted coal tar
  • Method for extracting coal tar by using double solvents and application of extracted coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment relates to a method for extracting coal tar utilizing dual solvents, specifically comprising the following steps:

[0028] Step (1): Add 2 times the volume of the first solvent to coal tar with an acid value of 9.0 and a density of 1.01, and stir for 30 minutes to obtain a mixed solution A. The first solvent is sodium methoxide with a mass fraction of 0.5%. methanol solution;

[0029] Step (2): Add the second solvent and glycerin to the mixed solution A, and continue to stir for 40 minutes to obtain the mixed solution B. The second solvent is No. 6 solvent naphtha, and the dosage is twice the volume of the mixed solution A. The glycerin The addition amount is 2% of coal tar volume;

[0030] Step (3): Put the mixed liquid B into layers, the upper layer is the No. 6 solvent oil phase, and the lower layer is the methanol phase, and separate to obtain the No. 6 solvent oil phase and the methanol phase;

[0031] Step (4): After the No. 6 solvent oil ...

Embodiment 2

[0037] The present embodiment relates to a method for extracting coal tar utilizing dual solvents, specifically comprising the following steps:

[0038] Step (1): Add 2 times the volume of the first solvent to coal tar with an acid value of 16.2 and a density of 1.13, and stir for 35 minutes to obtain a mixed solution A. The first solvent is sodium methoxide with a mass fraction of 1.0%. methanol solution;

[0039] Step (2): Add an appropriate amount of the second solvent to the mixed solution A, and continue to stir for 30 minutes to obtain the mixed solution B. The second solvent is No. 6 solvent oil, and the dosage is 1.5 times the volume of the mixed solution A;

[0040] Step (3): Put the mixed liquid B into layers, the upper layer is the No. 6 solvent oil phase, and the lower layer is the methanol phase, and separate to obtain the No. 6 solvent oil phase and the methanol phase;

[0041] Step (4): After the No. 6 solvent oil phase is distilled and recovered at a temperatu...

Embodiment 3

[0047] The present embodiment relates to a method for extracting coal tar utilizing dual solvents, specifically comprising the following steps:

[0048] Step (1): Add 2 times the volume of the first solvent to coal tar with an acid value of 26.5 and a density of 1.06, and stir for 40 minutes to obtain a mixed solution A. The first solvent is sodium methoxide with a mass fraction of 1.8%. methanol solution;

[0049] Step (2): Add an appropriate amount of the second solvent and glycerin to the mixed solution A, and continue to stir for 50 minutes to obtain the mixed solution B. The second solvent is No. 6 solvent naphtha, and the amount used is equal to the volume of the mixed solution A. The addition of glycerin is 1% of coal tar volume;

[0050] Step (3): Put the mixed liquid B into layers, the upper layer is the No. 6 solvent oil phase, and the lower layer is the methanol phase, and separate to obtain the No. 6 solvent oil phase and the methanol phase;

[0051] Step (4): Af...

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 invention provides a method for extracting coal tar by using double solvents and an application of extracted coal tar. The method specifically comprises the following steps: adding a proper amountof a first solvent into coal tar, and carrying out stirring for 30-40 minutes to obtain a mixed solution A, wherein the first solvent is a methanol solution of sodium methoxide; adding a proper amount of a second solvent into the mixed solution A, continuing carrying out stirring for 30-50 minutes to obtain a mixed solution B, wherein the second solvent is No.6 solvent oil; layering the mixed solution B by standing, wherein the upper layer is a No.6 solvent oil phase, and the lower layer is a methanol phase, and carrying out separating to obtain the No.6 solvent oil phase and the methanol phase; and recovering No.6 solvent oil by distilling the No.6 solvent oil phase, so that the extracted coal tar is obtained. The coal tar is extracted by adopting two solvents comprising the methanol solution of sodium methoxide and the No.6 solvent oil, so that the defects that an existing coal tar extraction method is large in emulsion layer size and poor in acid reduction effect are overcome.

Description

technical field [0001] The invention relates to a method for extracting coal tar by using two solvents and its application, in particular to a method for extracting coal tar by using two solvents and its application in preparing marine fuel oil. Background technique [0002] Coal tar is a complex mixture of hydrocarbons, most of which are polycyclic and condensed ring compounds with or without side chains and heterocyclic compounds containing oxygen, sulfur and nitrogen, and contain a small amount of aliphatic hydrocarbons, ring Alkanes and unsaturated hydrocarbons, as well as coal dust, coke dust and pyrolytic carbon. With the soaring oil price, the use of coal tar to produce fuel oil has attracted increasing attention. Because coal tar has a high content of acidic substances, such as petroleum acid, carbolic acid, naphthenic acid, etc., it cannot be directly used to prepare marine fuel oil. Carry out extraction to reduce acidity. In the prior art, coal tar is mostly extr...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/02C10G21/16C10G21/14C10G21/28
CPCC10G21/02C10G21/14C10G21/16C10G21/28
Inventor 袁勇雷冲天
Owner 佛山市光烨环保科技有限公司