Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method for preparing furfural by hemicellulose two-step method in continuous flow microchannel reactor

A technology of microchannel reactor and channel reactor, which is applied in chemical instruments and methods, chemical/physical/physical chemical reactors, organic chemistry, etc., can solve the problems of low utilization rate of raw materials, pollution, low yield of furfural, etc. To achieve the effect of improving selectivity or safety, reducing cost, and reducing the amount of reaction materials

Active Publication Date: 2019-08-16
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The production of furfural by one-step method has low yield, serious pollution, and low utilization rate of raw materials, so more and more attention has been paid to the production of furfural by two-step method

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
  • A kind of method for preparing furfural by hemicellulose two-step method in continuous flow microchannel reactor
  • A kind of method for preparing furfural by hemicellulose two-step method in continuous flow microchannel reactor
  • A kind of method for preparing furfural by hemicellulose two-step method in continuous flow microchannel reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The continuous flow microchannel reactor used is the enhanced mass transfer microchannel reactor of Corning Corporation of the United States, (the mode of the reactor is a "heart-shaped" structural function module) and the hydraulic diameter is 8mm. figure 1 1. Determine the connection mode of the microchannel reactor, the number of mixed reaction modules is determined according to the flow rate and reaction residence time, and the heating medium is heat transfer oil.

[0061] The hemicellulose raw material comes from the turbid liquid with a hemicellulose content of 20% recovered from chemical fiber waste liquid. The equipment is divided into two reaction areas

[0062] First reaction zone:

[0063] (1) In order to make the reaction reach the best yield, the raw material of hemicellulose is configured as an aqueous solution with a hemicellulose content of 20wt%, and the catalyst sulfuric acid is made into a 40wt% aqueous solution. Beyond this range, solids will be prec...

Embodiment 2

[0077] The microchannel reactor that the present invention adopts is the enhanced mass transfer type microchannel reactor of American Corning Company, and this reaction system is assembled by a plurality of modules; The material of this module is silicon carbide and special glass etc.; The microchannel structure in the module There are two types of direct-flow channel structure and enhanced mixed-type channel structure. The direct-flow channel is a tubular structure, and the enhanced-mixed channel structure is a heart-shaped structure. The hydraulic diameter of the channel is 8mm; the continuous flow microchannel reactor used (straight channel functional module + "Heart-shaped" structural function module) process, refer to figure 1 1. Determine the connection mode of the microchannel reactor, the number of mixed reaction modules is determined according to the flow rate and reaction residence time, and the heating medium is heat transfer oil.

[0078] The hemicellulose raw mate...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The present invention belongs to the technical field of organic synthesis applications, and relates to a technology for producing furfural by using hemicellulose recovered from a chemical fiber waste liquid through a continuous method, particularly to a method for preparing furfural by preparing xylose from hemicellulose by using a continuous flow micro-channel reactor and continuously carrying out a reaction. According to the present invention, the hemicellulose recovered from the chemical fiber industry waste alkali liquid is used as the raw material, and is directly converted into furfural in the continuous micro-channel reactor by using the two-step reaction; through the catalyst separation and recovery, the yield, the economic benefits, the pollution reducing, the ecological environment improvement and other fields are substantially improved; and the micro-reaction process is that the chemical reaction is performed by replacing the traditional chemical reaction pot with the micro-channel reactor and the industrial production is achieved.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis applications, and relates to a technology for producing furfural by using a continuous method of hemicellulose recovered from chemical fiber waste liquid, in particular to a two-step process for preparing furfural from hemicellulose in a continuous flow microchannel reactor. Background technique [0002] Furfural is an important basic organic chemical raw material that cannot be synthesized by chemical methods at present. It is the only unsaturated organic chemical with large specific volume obtained from sugar compounds. Its chemical properties are very active. Furfural and its Derivatives are widely used organic chemical intermediates. In addition, furfural can also generate 5-hydroxymethylfurfural through hydroxymethylation with formaldehyde, and can also be used as a raw material to prepare gasoline, diesel and aviation kerosene. Methyl tetrahydrofuran generated by furfural through h...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/50B01J19/00
CPCB01J19/0093B01J2219/00824B01J2219/00831B01J2219/00871C07D307/50
Inventor 武长安雷林唐印刘朝慧李旭初郭志刚王明权李刚张帮成
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD