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Catalyst prepared by utilizing paper mill black water and application of the catalyst in biodiesel preparation

A technology of biodiesel and catalyst, applied in physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, chemical/physical process, etc., can solve the problems that have not yet been reported successfully, difficult economic benefits, recovery The problem of high cost, to achieve the effect of continuous organic material source, high activity and easy separation

Inactive Publication Date: 2013-03-20
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct discharge will cause serious pollution to the environment. Because of its high recycling cost and difficulty in generating economic benefits, its treatment has become a headache for paper companies.
Using black water from paper mills as a raw material for biodiesel catalysts has the advantages of turning waste into wealth, solving environmental pollution, and sustainable development, but there are no successful reports in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Collect the black water of the paper mill, adjust the black water of the paper mill to pH 6 with 5 mol / L hydrochloric acid, then add twice the volume of 95% ethanol to precipitate lignin, and distill the filtered lignin sample at 80-100°C to Recover ethanol, then suspend with pH 2.0 hydrochloric acid solution, filter again and wash 3 times with pH 2.0 aqueous solution, and dry the sample at 55-105°C to obtain lignin. 10 g of dry lignin was pretreated with phosphoric acid solution at 60 °C for 120 min to obtain lignin with a loose structure, and the porous carbon support was carbonized at 400 °C for 5 h under the protection of an inert gas, and the porous carbon The carrier was sulfonated with 98% concentrated sulfuric acid at 150 °C for 5 h to obtain a black solid powder, which was washed with deionized water and dried to obtain a lignin-based solid acid.

[0029] XRD shows that the catalyst has an amorphous carbon structure composed of layered aromatic ring carbons, an...

Embodiment 2

[0031] Repeat Example 1 with the following differences: 10 g of recovered lignin was weighed, carbonized at 400°C for 1 h under nitrogen protection, and then sulfonated at 200°C for 2 h to obtain 5.1 g of lignin-based solid acid. Mix 14.1 g of oleic acid and 16 g of methanol in a reactor, heat to 80°C, add 0.7 g of lignin-based solid acid, stir and react at 80°C, 150 r / min for 5 h, and the esterification rate is 94.2%. The reaction solution is centrifuged to recover lignin-based solid acid, the remaining liquid phase is subjected to vacuum distillation to recover methanol, the remaining liquid phase is biodiesel, and the refined product of biodiesel is obtained through vacuum distillation. The lignin-based solid acid was washed three times with methanol and then dried.

Embodiment 3

[0033] Repeat Example 1 with the following differences: 10 g of recovered lignin was weighed, treated with phosphoric acid for 60 min, carbonized at 400°C for 1 h under nitrogen protection, and then sulfonated at 200°C for 2 h to obtain lignin Base solid acid 6.3 g. Mix 14.1 g of oleic acid and 16 g of methanol in a reactor, heat to 80 °C, add 0.7 g of lignin-based solid acid, stir and react at 80 °C, 150 r / min for 5 h, and the esterification rate is 96.5%. The reaction solution is centrifuged to recover lignin-based solid acid, the remaining liquid phase is subjected to vacuum distillation to recover methanol, the remaining liquid phase is biodiesel, and the refined product of biodiesel is obtained through vacuum distillation. The lignin-based solid acid was washed three times with methanol and then dried.

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Abstract

The invention discloses a catalyst prepared by utilizing paper mill black water and application of the catalyst in biodiesel preparation. Paper mill black water is used as a raw material to recover lignin which is a raw material of a solid acid carrier, and a solid acid is synthesized by a carbonization-sulfonation two-step method, so as to change wastes into valuables, solve a problem of discharge pollution, and mitigate difficulty in river pollution treatment by a certain degree. Recovered lignin is treated with acidic solutions to increase porosity and active sites that can be sulfated, as well as acid density of the prepared solid acid. After an esterification, a lignin based solid acid can precipitate rapidly and is easy to separate. Besides, the repeatedly usable catalyst with a high activity can be discharged without pollution, so as to facilitate the realization of green production technology of biodiesel. In addition, the lignin based solid acid can be used to catalyze other organic reactions, such as oxidation reduction reactions of sulfide, tertiary amine, secondary alcohol and aldehyde for preparing sulfone, nitrogen oxide, lactone and methyl ester, etc.

Description

technical field [0001] The invention belongs to the technical field of renewable energy production, in particular to a biodiesel catalyst prepared by using black water from a paper mill. At the same time, the invention also relates to the specific application of the catalyst in the preparation of biodiesel. Background technique [0002] The main chemical composition of biodiesel is long-chain fatty acid monoester, which has the characteristics of good lubricity, sufficient combustion, safe storage and transportation, good anti-knock performance, and environmental friendliness. It can be used as a substitute for petrochemical diesel or mixed with petrochemical diesel. In the past 10 years, the global biodiesel market has shown rapid and steady growth. At present, Europe has the highest production and consumption of biodiesel, accounting for 80% of the world; the United States has the fastest growth rate of biodiesel production; Brazil has abundant natural resources and will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C11C3/00
Inventor 郭峰方真潘慧琳
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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