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A kind of method that biomass directly prepares annular fuel intermediate

A technology for biomass and intermediates, which is applied in the field of directly preparing annular fuel intermediates from biomass, can solve the problems of reducing conversion efficiency and product quality, and complicated separation and purification of intermediate products in multi-reactor operation, which is beneficial to industrialization and process. Simple and efficient effects

Active Publication Date: 2021-11-09
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for directly preparing a ring-shaped fuel intermediate from biomass. Under the combined action of choline chloride-based ionic liquid and tin chloride co-catalyst, directly react biomass with cyclopentanone in one step to efficiently generate C10 and C15 cyclic biofuel intermediates do not require intermediate product separation, which solves the problem of traditional base catalysis and ionic liquid catalysis with many steps, involving multi-reactor operations, complex separation and purification of intermediate products, and multi-unit operations will reduce conversion efficiency and products. quality problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Mix lactic acid and choline chloride according to the molar ratio of 8:1 to prepare lactic acid / choline chloride ionic liquid, add corn cob to make its mass concentration 5%, according to the mass of corn cob and cyclopentanone Add cyclopentanone at a ratio of 1:3, add 4mmol tin chloride as a cocatalyst, and react at 60°C for 3h. The selectivities of C10 and C15 biofuel intermediates obtained in the liquid phase are 52.79% and 46.67%, respectively, and the total yield It is 99.46%, and the solid phase cellulose content is 78%.

Embodiment 2

[0016] Mix urea and choline chloride according to the molar ratio of 12:1 to obtain urea / choline chloride ionic liquid, add the radix radix herb residue to make the mass concentration 1%, and the mass ratio of corncob to cyclopentanone is Add cyclopentanone at 1:5, add 6mmol tin chloride co-catalyst, react at 100°C for 2h, the selectivities of C10 and C15 biofuel intermediates obtained in the liquid phase are 57.52% and 3.54%, respectively, and the total yield is 61.05% %, the solid phase cellulose content is 82%.

Embodiment 3

[0018] Glycerol and choline chloride were mixed according to the molar ratio of 12:1 to obtain glycerol / choline chloride ionic liquid, and the energy plant pennisetum was added to make the mass concentration 2%. The ketone mass ratio is 1:10, cyclopentanone is added, 8mmol tin chloride co-catalyst is added, and the reaction is carried out at 120°C for 30min. The yield is 51.84%, and the solid phase cellulose content is 91%.

[0019] The above examples prove that by using the above-mentioned ionic liquid / metal chloride system, biomass can be directly converted into a ring-shaped fuel intermediate, and the process is simple and efficient.

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Abstract

The invention discloses a method for directly preparing a ring-shaped fuel intermediate from biomass. Under the joint action of choline chloride ionic liquid and tin chloride co-catalyst, the biomass and cyclopentanone are directly reacted in one step to efficiently generate C10 and The C15 cyclic biofuel intermediate does not require the separation of intermediate products, which solves the problems of traditional base catalysis and ionic liquid catalysis with many steps, involving multi-reactor operations, complex separation and purification of intermediate products, and multi-unit operations will reduce conversion efficiency and product quality. question.

Description

Technical field: [0001] The invention relates to the technical field of biomass energy, in particular to a method for directly preparing a ring-shaped fuel intermediate from biomass. Background technique: [0002] Efficient synthesis of biological liquid fuel intermediates is one of the hotspots in the field of biomass energy research. The common route is to first hydrolyze the biomass raw materials under acid catalysis, and then produce furfural compounds after dehydration, and then further hydrolyze or hydrogenate to prepare furfuryl alcohol, Furan derivatives such as methyl ketone, but the content of C atoms (C5-C6) of biomass platform compounds obtained by this method is relatively low, and cannot be directly converted into high-density, high-quality liquid alkane fuels. Through C-C coupling reaction (aldol condensation, alkylation reaction, etc.) to grow the carbon chain and convert it into a multi-carbon intermediate, and then obtain C8-C20 bio-liquid fuel through hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/02
CPCC10L1/02
Inventor 余强陈小燕张宇王闻孙永明王忠铭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI