Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A furfural and process technology, applied in the field of furfural preparation process, to achieve the effects of saving volume, eliminating excessive reaction, and enhancing microscopic mixing effect
Inactive Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0013] Aiming at the deficiencies of the prior art, the present invention provides a furfural preparation process, especially a new method for efficiently producing furfural and recovering the by-products formic acid and acetic acid at the same time, and a liquid-liquid mixing impingement flow reaction that is especially suitable for the process It achieves fluid mixing through multiple impacts, and has
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0053] The crushed corn stalks and water were injected into the hydrolysis tank according to the mass ratio of 1:1. The pre-hydrolysis temperature was 160°C and the pre-hydrolysis time was 30 min. The mass concentrations of pentose, acetic acid and formic acid in the pentose solution obtained after the reaction were 5.2% and 2.5% respectively. , 0.7%.
[0054] The composite extractant used is dimethyl phthalate, n-octanol, ethyl triphenylphosphine hexafluorophosphate mixed solvent, wherein, dimethyl phthalate accounts for 40wt%, n-octanol accounts for 20wt%, Ethyl triphenylphosphine hexafluorophosphate accounts for 40wt%.
[0055] The feed ratio of extractant and pentose solution is 3:1 (volume ratio), and the feed rate of extractant and pentose solution is equal to the impinging flow reactor volume (that is, the feed volume space velocity is 1h -1 , that is, the reaction time is 1h), and the circulating material rate is 200% of the feed amount. Control the reaction temperat...
Embodiment 2
[0058] According to the method of Example 1, the difference is that the feed rate is twice the volume of the impinging flow reactor, that is, the reaction time is 0.5 h.
[0059] The experimental results showed that the conversion rate of pentose sugar was 77wt%, the yield of furfural was 60.9wt%, the recovery rate of acetic acid was 94.1wt%, and the recovery rate of formic acid was 90.7wt%.
Embodiment 3
[0061] According to the method of Example 1, the difference is that the feed rate is 0.67 times the volume of the impinging flow reactor, that is, the reaction time is 1.5 h.
[0062] The experimental results showed that the conversion rate of pentose sugar was 99%, the yield of furfural was 82.4%, the recovery rate of acetic acid was 94.1%, and the recovery rate of formic acid was 90.7%.
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
Login to view more
Abstract
The invention discloses a novel technology for efficiently producing furfural and simultaneously recycling by-products including methanoic acid and acetic acid. An impinging stream reactor which is especially suitable for the technology is adopted, fluid mixing is achieved through multiple times of impinging, a good micromixing effect is achieved, mixed liquid flows outside an impinging area in a plug-flow mode, sufficient staying time is provided for materials, cascaded reacting is achieved, and the target conversion rate is achieved through flow channel and liquid flow rate design. According to the technology, the defect that an existing impinging stream reactor cannot achieve the high conversion rate through a single reactor is overcome, the technology procedures are simplified, production cost and equipment investment are reduced, and long-period running of equipment is guaranteed; no waste liquid is drained in the production process, and a green and environment-friendly technology method is achieved.
Description
technical field [0001] The invention relates to a furfural preparation process, in particular to a process for producing furfural by using a high-efficiency mixing reactor and simultaneously producing formic acid and acetic acid by-products. Background technique [0002] Furfural, also known as furfural. Due to the existence of functional groups such as aldehyde groups, dienes, and cyclic ethers in the molecular structure of furfural, it has the properties of aldehydes, ethers, dienes, and aromatic compounds, and can participate in many different types of reactions and synthesize a variety of chemical products. It is used in food, medicine, synthetic resin, casting and many other production fields. [0003] Currently, furfural is produced from plant fibers rich in pentosan, such as corn cobs, bagasse, corn stalks, and rice husks. The principle is that pentosan is firstly hydrolyzed into pentose, and then the pentose is dehydrated and cyclized to furfural. [0004] Accordi...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more