Carbonaceous solid acid catalyst prepared by direct sulphonation of biomass

A solid acid catalyst and biomass technology, applied in the direction of physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, chemical/physical processes, etc., can solve the problem of disappearing price advantages of carbon catalysts, and achieve Good recovery and reuse effect, rich and renewable raw material resources, and the effect of improving the efficiency of esterification reaction

Inactive Publication Date: 2008-12-03
DALIAN UNIV OF TECH
View PDF2 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid rise in the price of raw material resources such as sugar, starch or c

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
  • Carbonaceous solid acid catalyst prepared by direct sulphonation of biomass

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example one

[0021] Weigh 14g of dried wood chips, wheat straw, bean stalks, corn stalks, rice stalks, lignin, rice husks, walnut husks, apricot husks, glucose, sucrose, and starch. Carry out the sulfonation reaction at ℃, keep the stirring rate at about 600r / min, after 4h of reaction, add the reaction mixture to 300ml of distilled water and stir well, then filter, dry, and then repeatedly wash with 100℃ distilled water until the filtrate is complete It is neutral and can be dried to obtain a carbonaceous solid acid catalyst.

[0022] Catalytic effect: 14g methanol, 15.86g oleic acid and 1g carbon catalyst are put into the continuous distillation-water separation esterification device to carry out the esterification reaction at 90℃ (reboiler temperature is 85℃), after 2 hours of reaction The yield of methyl oleate and the esterification conversion rate are shown in Table 1.

[0023] Table 1. Catalytic esterification effect of solid acid catalysts prepared from different bi...

Example Embodiment

[0025] Example two

[0026] Weigh 14g of dry sawdust and directly add 98g of concentrated sulfuric acid, protected by nitrogen, carry out sulfonation reaction at 100℃, keep the stirring rate at about 600r / min, after reacting for 1h, add the reaction mixture to 300ml of distilled water and stir fully , And then filtered, dried, and then repeatedly washed with distilled water at 100°C until the filtrate is completely neutral and dried to obtain a carbonaceous solid acid catalyst.

[0027] Catalytic effect: Catalytic effect: 14g methanol, 15.86g oleic acid and 1g carbon catalyst are put into the continuous distillation-water separation esterification unit to carry out the esterification reaction at 70℃ (reboiler temperature is 85℃), reaction 6 One hour later, 15.39 g of methyl oleate was obtained, and the esterification rate was 97.03%.

Example Embodiment

[0028] Example three

[0029] Weigh 14g of dry sawdust and add 140g of concentrated sulfuric acid directly, protect by nitrogen, and carry out sulfonation reaction at 50°C. The stirring rate is maintained at about 600r / min. After 3 hours of reaction, the reaction mixture is added to 300ml of distilled water and fully stirred. Then it is filtered, dried, and washed repeatedly with distilled water at 100°C until the filtrate is completely neutral, and the carbonaceous solid acid catalyst can be obtained by drying.

[0030] Catalytic effect: Catalytic effect: 14g methanol, 15.86g oleic acid and 0.8g carbon catalyst are put into the continuous distillation-water separation esterification unit to carry out the esterification reaction at 100℃ (reboiler temperature is 85℃). After 1 hour, 15.26 g of methyl oleate was obtained, and the esterification rate was 96.22%.

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 belongs to the novel material and novel energy technical field and relates to a method for preparing a carbonaceous solid acid catalyst and biodiesel, in particular to a method for preparing the carbonaceous solid acid catalyst and the biodiesel by directly sulfonating pure natural biomass. The method is characterized in that: pure natural and renewable biomass is used as a raw material, concentrated sulfuric acid is directly used to sulfonate the biomass into biomass-based carbonaceous solid acid catalyst, and a continuous rectification-water separation esterification reaction process is adopted to perform the catalytic esterification reaction between free fatty acid or waste grease and short chain alcohol to produce the biodiesel. The raw material adopted by the method has rich resource and low cost, is purely natural and renewable, and belongs to the waste utilization; the method has simple preparation technology, mild and controllable reaction conditions, and low manufacturing cost; the catalyst has high activity, good stability, easy recovery and no corrosion to equipment, belongs to an environment-friendly catalyst, is suitable for mass industrialized introduction of the biodiesel, and can also be used for organic reactions such as alkylation, hydrolyzation, hydration and so on.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a method for preparing a carbonaceous solid acid catalyst and biodiesel, in particular to a method for directly sulfonating biomass to prepare a carbonaceous solid acid catalyst and biodiesel. Background technique [0002] With the gradual depletion of oil resources, it is imperative to explore new energy sources. Biodiesel mainly refers to a mixture containing saturated or bad fatty acid monoesters synthesized from animal and vegetable oils and short-chain alcohols through esterification reaction. Because biodiesel has the advantages of being renewable, easy to biodegrade, non-toxic, low in sulfur content and small in emissions of harmful substances, it is a clean and renewable energy, an environmentally friendly fuel, and an excellent substitute for conventional petroleum diesel. . [0003] Chemical production of biodiesel mainly uses chemical catalytic methods such as acid m...

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): B01J31/06B01J31/02
Inventor 王同华乌日娜修志龙潘艳秋银建中
Owner DALIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap