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Preparing method of porous poly ion liquid catalyst used for synthesizing biodiesel

A technology of polyionic liquid and synthetic biology, applied in the field of catalytic synthesis of biodiesel, can solve problems such as restricting application, and achieve the effects of good reusability, easy separation and recovery, and large comparative area.

Inactive Publication Date: 2016-06-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ionic liquids have certain shortcomings in the convenience of separation and reuse, and the amount of catalyst used, which restricts their wider application in catalysis.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 32mmol of anhydrous iron trichloride, 12.8mmol of trisodium citrate dihydrate, 19.2mmol of anhydrous sodium acetate, and 2560mmol of ethylene glycol were mixed and stirred until completely dissolved. The solution was transferred to a hydrothermal reactor and kept at 180°C for 16h. The product is washed and dried to obtain 2.02g Fe 3 O 4 Particles. 1gFe 3 O 4 Disperse in 40ml absolute ethanol by ultrasonic and add 1ml NH 3 ·H 2 O and 1g of γ-methacryloxypropyltrimethoxysilane were reacted at 30°C for 24h. 1.28g modified magnetic material Fe is obtained after separation, washing and vacuum drying 3 O 4 MPS.

[0024] 1gFe 3 O 4 MPS was dispersed in 40ml of absolute ethanol, and 1g of 1-vinyl-3-propylsulfonic acid imidazole tetrafluoroborate ionic liquid and 0.05g of azobisisobutyronitrile were added. N 2 React at 60°C for 24h in an atmosphere. After product separation, washing and vacuum drying, 1.75g ​​Fe is obtained 3 O 4 PIL. Add hydrochloric acid (8mol / L, 2.5ml) to 50m...

Embodiment 2

[0027] 32mmol of anhydrous iron trichloride, 19.2mmol of trisodium citrate dihydrate, 28.8mmol of anhydrous sodium acetate, and 3200mmol of ethylene glycol were mixed and stirred until completely dissolved, then transferred to a hydrothermal reactor, kept at 220°C for 8 hours. 2.29g Fe after washing and drying 3 O 4 Particles. 1.0gFe 3 O 4 Ultrasonic dispersion in 80ml absolute ethanol, add 2ml NH 3 ·H 2 O and 4.0g γ-methacryloxypropyltrimethoxysilane were reacted at 50°C for 72h. 1.61g of modified magnetic material Fe is obtained after separation, washing and vacuum drying 3 O 4 MPS.

[0028] 1gFe 3 O 4 MPS was dispersed in 50ml of absolute ethanol, and 3g of 1-vinyl-3-propylsulfonic acid imidazole hydrogen sulfate ionic liquid and 0.15g of azobisisobutyronitrile were added. N 2 React at 90°C for 36 hours in an atmosphere. After product separation, washing and vacuum drying, 3.65g Fe is obtained 3 O 4 PIL. Add hydrochloric acid (12mol / L, 5ml) to 50ml ethanol, add 1gFe 3 O 4 P...

Embodiment 3

[0031] 32mmol of anhydrous iron trichloride, 16mmol of trisodium citrate dihydrate, 24mmol of anhydrous sodium acetate, and 2880mmol of ethylene glycol were mixed and stirred until completely dissolved, then transferred to a hydrothermal reaction vessel, kept at 200°C for 12h. 2.15g Fe after washing and drying 3 O 4 Particles. 1gFe 3 O 4 Ultrasonic dispersion in 60ml absolute ethanol, add 2ml NH 3 ·H 2 O and 2.5g of γ-methacryloxypropyltrimethoxysilane were reacted at 40°C for 48h. 1.45g modified magnetic material Fe is obtained after separation, washing and vacuum drying 3 O 4 MPS.

[0032] 1gFe 3 O 4 MPS was dispersed in 40 ml of absolute ethanol, and 3 g of 1-vinyl-3-butanesulfonic acid imidazole hydrogen phosphate ionic liquid and 0.1 g of azobisisobutyronitrile were added. N 2 React at 75°C for 30h in an atmosphere. After product separation, washing and vacuum drying, 3.42g Fe is obtained 3 O 4 PIL. Add hydrochloric acid (10mol / L, 4ml) to 80ml ethanol, add 0.8g Fe 3 O 4 P...

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Abstract

The invention discloses a preparing method of a porous poly ion liquid catalyst used for synthesizing biodiesel. N-vinyl imidazole type ion liquid is used as a monomer, Fe3O4 modified by gamma-methacryloxypropyltrimethoxysilane is used as a template agent, a poly ion liquid hybrid material is prepared, and hydrochloric acid is used for removing Fe3O4, so that the porous poly ion liquid catalyst is obtained. The prepared catalyst has the advantages of being large in specific surface area, high in acidity, large in active bit density and the like. The catalyst has the advantages of being high in catalytic activity in the reaction of synthesizing biodiesel through oleic acid and short-chain alcohol esterification, reaction conditions are mild, separating and recycling are easy, and the catalyst is reused.

Description

Technical field [0001] The invention relates to the preparation of a porous polyionic liquid catalyst for synthesizing biodiesel, and belongs to the field of catalytic synthesis of biodiesel. Background technique [0002] With the scarcity of fossil fuels, bioenergy has attracted more and more attention. Biodiesel has similar properties to mineral diesel, and is non-toxic, biodegradable, and environmentally friendly, making it an ideal substitute for mineral diesel. [0003] The esterification of free fatty acids and small alcohols should be a process route for biodiesel synthesis in addition to transesterification. At the same time, the esterification reaction can pretreat the raw materials under the condition of high acid value to prevent the saponification reaction during the alkali-catalyzed transesterification process. In most cases, the esterification reaction is catalyzed by liquid acids such as sulfuric acid. Although this type of catalyst can achieve a high conversion ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/02C10L1/02C07C67/08C07C69/58
CPCC10L1/02C07C67/08B01J31/0295B01J31/28B01J2231/49C10L2200/0484C10L2290/12B01J35/33C07C69/58Y02E50/10
Inventor 管国锋万辉吴作旺陈冲王磊
Owner NANJING UNIV OF TECH
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