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

Processing method of lignite

A processing method and lignite technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of liquid hydrocarbon mixtures, etc., can solve problems such as harsh operating conditions, high equipment requirements, and high cost, and achieve a high degree of localization, The effect of high liquefied oil yield and low cost

Active Publication Date: 2013-06-19
ZHAOQING SHUNXIN COAL CHEM TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Japan's BCL process has disadvantages such as harsh operating conditions, high requirements for equipment, high cost, and high cost.

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
  • Processing method of lignite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the lignite and methanol are mixed and soaked according to the mass ratio of 1:3, and the swelling pretreatment is carried out at normal temperature and pressure. After 4 hours of swelling pretreatment, the pH of the swollen mixture was adjusted to 8.0 with NaOH solution, and supercritical methanol extraction was carried out under the supercritical conditions of extraction temperature 260°C and pressure 9.0MPa, and the extraction time was 60 minutes to obtain the extract and raffinate The conversion of lignite to crude phenol, methyl organic acid and humic acid in this section can reach 21.31% (daf).

[0021] The raffinate is prepared into coal slurry, which is subjected to hot-melt catalytic liquefaction treatment (see ZL200710032428.4 for the specific process of hot-melt catalytic liquefaction, which discloses a hot-melt catalytic method for producing liquid fuel from lignite), and the yield of liquefied oil is 31.13% (daf), the total produ...

Embodiment 2

[0026] The lignite and methanol are mixed and soaked according to the mass ratio of 1:2, and the swelling pretreatment is carried out at normal temperature and pressure. After 4 hours of swelling pretreatment, the pH of the swollen mixture was adjusted to 8.0 with NaOH solution, and supercritical methanol extraction was carried out under the supercritical conditions of extraction temperature 260°C and pressure 9.0MPa, and the extraction time was 60 minutes to obtain the extract and raffinate The conversion rate of lignite to crude phenol, organic acid methyl ester and humic acid reaches 16.24% (daf).

[0027] The raffinate is prepared into coal slurry, which is subjected to thermal solution catalytic liquefaction treatment, and the yield of liquefied oil is 32.06% (daf), and the total product yield reaches 43.09%. Compared with the single-stage hot-melt catalytic liquefaction in this embodiment, the total product yield has increased by about 12%; hydrogen consumption has been ...

Embodiment 3

[0032] The lignite and methanol are mixed and soaked according to the mass ratio of 1:5, and the swelling pretreatment is carried out at normal temperature and pressure. After 4 hours of swelling pretreatment, the pH of the swollen mixture was adjusted to 8.0 with NaOH solution, and supercritical methanol extraction was carried out under the supercritical conditions of extraction temperature 260°C and pressure 9.0MPa, and the extraction time was 60 minutes to obtain the extract and raffinate The conversion rate of lignite to crude phenol, organic acid methyl ester and humic acid is 23.06% (daf).

[0033] The raffinate is prepared into coal slurry, which is subjected to thermal solution catalytic liquefaction treatment, and the yield of liquefied oil is 30.69% (daf), and the total product yield reaches 46.67%. Compared with the single-stage hot-melt catalytic liquefaction in this embodiment, the total product yield has increased by about 15%; hydrogen consumption has been saved...

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 discloses a processing method of lignite, comprising the following steps: A, taking methyl alcohol as extractant to carry out supercritical extraction processing to the lignite to obtain extraction liquid and raffinate; B, carrying out hot melt catalysis liquefaction processing to the raffinate to obtain liquid fuel. The invention has the beneficial effect: 1, the invention has moderate reaction condition, simple operation technology, high liquid oil yield, high domestication degree, low input and low cost and is safe and stable, and higher conversion rate of lignite; 2, the invention can obtain humic acid, organic acid methyl ester and phenol substances (phenyl hydroxide, cresol, dimethyl phenol and the like) and increase the additional value of products; 3, the supercritical methyl alcohol adopted by the invention removes R-OH and R-COOH class micromolecule substances in the lignite, which can reduce hydrogen consumption amount in the process of hot melt catalysis liquefaction so as to reduce hydrogen consumption; meanwhile, CO2 discharge amount in the process of hot melt catalysis liquefaction can be greatly reduced so as to achieve the purpose of greenhouse gas emission reduction; and 4, the invention performs swelling pretreatment to the lignite, changes lignite micropore structure, amplifies response ratio superficial area and improves the conversion rate of the lignite.

Description

technical field [0001] The invention belongs to the technical field of coal chemical processing, and in particular relates to a method for processing lignite by combining supercritical extraction and thermal solution catalytic liquefaction. Background technique [0002] Lignite is a low-rank coal between peat and bituminous coal. It is rich in reserves in my country. The proven reserves of lignite are 131.142 billion tons, accounting for 13% of coal reserves. However, compared with other coal types, lignite has high water content and is easy to weather in the air; it contains a certain amount of primary humic acid and has low carbon content; it has high volatile content, generally 45% to 55% (daf); lignite The thermal efficiency of direct combustion is low, and the industrial application value is low. Therefore, the research on how to rationally develop and efficiently utilize lignite resources is of great significance when oil production is far from meeting social needs. ...

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 Patents(China)
IPC IPC(8): C10G1/06C10G1/04C10L1/02C07G99/00C07C67/08C07C69/003C07C37/82C07C39/04C07C39/07
CPCY02P20/544Y02P30/10Y02P20/52Y02P20/54Y02P30/00
Inventor 吴克陈翀段占庭吴春来沙颖逊张治林顾菁
Owner ZHAOQING SHUNXIN COAL CHEM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com