Sludge carbon-based solid acid as well as preparation method and application thereof

A carbon-based solid acid and solid acid technology, applied in chemical instruments and methods, fatty acid production, fatty acid esterification, etc., can solve the problems of less acidic groups on the surface, high degree of aromatization, small pore size and pore volume, etc. To achieve the effect of increasing the specific surface area

Inactive Publication Date: 2018-11-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such carbon-based supports generally have problems such as high degree of aromatization, less carbon residues of fused ring structure, less acidic groups on the surface, small pore size and pore volume, etc. mission load

Method used

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  • Sludge carbon-based solid acid as well as preparation method and application thereof
  • Sludge carbon-based solid acid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this example, a sludge charcoal-based solid acid was prepared using the scheme (1) two-step method, as follows:

[0040] a. Sludge sampling and pretreatment:

[0041] Take 500g of sludge (with a C content of 45.17%), dry it at 105°C for 24 hours, then grind it and pass it through a 100-mesh sieve to collect the sludge powder, and then place the collected sludge powder at 5°C Cold storage for backup;

[0042] b. Carbonization reaction process:

[0043] Take the sludge powder in the step a, mix and stir evenly according to the ratio of 1g:6ml (sludge: distilled water), transfer the mixed slurry to the lining of the polytetrafluoroethylene reactor for airtight storage, and then transfer it to the reactor Inject nitrogen gas into the inner lining for 15 minutes to wash the air, discharge the air in the inner lining of the reactor, then put the inner lining of the reactor into the stainless steel reactor tank, and put the reactor tank with the sludge mixed slurry into t...

Embodiment 2

[0052] In this example, a sludge charcoal-based solid acid is prepared by using the scheme (2) in one step, as follows:

[0053] a. Sludge sampling and pretreatment:

[0054] Take 500g of sludge (with a C content of 45.17%), dry it at 105°C for 24 hours, then grind it and pass it through a 100-mesh sieve to collect the sludge powder, and then place the collected sludge powder at 5°C Keep cold for later use.

[0055] b. Sludge deashing process and concentrated sulfuric acid sulfonation process:

[0056] Take 10g of sludge powder, add 50ml of hydrofluoric acid and 50ml of hydrochloric acid, mix and stir for 1 hour, wash with deionized water until neutral, filter with suction, and dry at 105°C. Using concentrated sulfuric acid direct hydrothermal sulfonation method, add 2g deashed dry sludge powder and 40ml concentrated sulfuric acid (mass fraction 98%) into a 50ml polytetrafluoroethylene reaction kettle, put it in an oven and heat it up to 180°C for reaction 4h.

[0057] c. ...

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Abstract

The invention relates to a sludge carbon-based solid acid as well as a preparation method and application thereof. According to the sludge carbon-based solid acid disclosed by the invention, rich organic matters and special structural properties of the sludge are fully utilized, the solid acid having strong acidity is prepared by virtue of concentrated sulfuric acid sulfonation by adopting two methods and is applied to a catalytic oleic acid esterification reaction, and under the optimal conditions, the high acid value oil conversion rate can reach 95% or higher. The method disclosed by the invention is huge in amount of needed raw material resources, simple in preparation process, mild in reaction conditions, low in process cost, low in energy consumption and suitable for further large-scale production, and can scientifically and reasonably solve the problems of sludge treatment and disposal and preparation of biodiesel by utilizing high acid value oil.

Description

technical field [0001] The invention relates to a preparation technology of a catalyst and uses the catalyst to treat high acid value oil, in particular to a preparation method of a sludge charcoal-based solid acid and uses the solid acid to catalyze the esterification reaction of oleic acid, and is applied to sludge disposal , New high-efficiency catalyst material preparation technology and biodiesel production technology field. Background technique [0002] Biodiesel is a clean, renewable, biodegradable, and completely combustible green fuel. Its production and application are of great significance for building a green sustainable model and alleviating environmental problems caused by the extensive use of fossil energy. The main method for industrial production of biodiesel is transesterification, which is the process of alcoholysis of oil and short-chain alcohols under the action of a catalyst to form long-chain fatty acid monoesters. Solid bases are often used as reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/04B01J35/10C11C3/00
CPCB01J31/04B01J35/10C11C3/003Y02E50/10
Inventor 孙颖张杨杨倩钱光人
Owner SHANGHAI UNIV
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