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A kind of preparation method of mulberry base solid acid

A solid acid, mulberry-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low adsorption performance and catalytic performance, large particle size of carbon-based solid acid, etc. , to achieve the effect of abundant raw materials, high preparation rate and solving the shortage of raw materials

Inactive Publication Date: 2016-05-18
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a mulberry-based solid acid for the problems and defects of the prior art that the particle size of the carbon-based solid acid is large, the adsorption performance and the catalytic performance are not high

Method used

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  • A kind of preparation method of mulberry base solid acid
  • A kind of preparation method of mulberry base solid acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Get the mulberry branch and cut off the mulberry branch skin with a knife, cut off the mulberry branch skin, wash away the sediment with tap water, dry at 105°C for 2 hours, pulverize, and pass through a 10-mesh sieve;

[0028] (2) Get 100g mulberry powder, add 1000g20% N-methylmorpholine oxide, process 3h at 80°C, add 1L water to the system to precipitate the mulberry powder, wash with water 2-3 times, Remove N-methylmorpholine oxide (the aqueous solution of N-methylmorpholine oxide can be distilled to remove water to a certain concentration for reuse);

[0029] (3) Add 5g of zinc chloride, stir evenly, filter to remove water, and dry at 105°C;

[0030] (4) The product obtained in step (3) is put into a crucible, placed in a tube furnace, protected by nitrogen, and heat-treated at 500° C. for 3 hours;

[0031] (5) Get the product obtained in step (4), add 100 g of oleum of 20% sulfur trioxide, heat and stir at 80° C. for acidification treatment for 2 h, remove aci...

Embodiment 2

[0033] (1) Get the mulberry branch and cut off the mulberry branch skin with a knife, cut off the mulberry branch skin, wash away the sediment with tap water, dry at 105°C for 2 hours, pulverize, and pass through a 10-mesh sieve;

[0034] (2) Take 100g of mulberry powder, add 800g of 60% N-methylmorpholine oxide, treat it at 100°C for 0.5h, add 1L of water to the system to precipitate the mulberry powder, wash with water 2-3 times , remove N-methylmorpholine oxide (the aqueous solution of N-methylmorpholine oxide can be distilled to remove water to a certain concentration for reuse);

[0035] (3) Add 6g ferric chloride, stir evenly, filter to remove water, and dry at 105°C;

[0036] (4) The product obtained in step (3) is put into a crucible, placed in a tube furnace, protected by nitrogen, and heat-treated at 400° C. for 5 hours;

[0037] (5) Get the product obtained in step (4), add 300 g of oleum of 20% sulfur trioxide, heat and stir at 80° C. for acidification treatment f...

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Abstract

The invention discloses a preparation method of a mulberry twig-based solid acid. The preparation method comprises the steps: firstly washing cleanly impurities and mud on mulberry twigs, peeling, drying, smashing, and thus obtaining a mulberry twig powder; then mixing the obtained mulberry twig powder with N-methyl morpholine oxide according to a ratio of 1:8-10, stirring at the temperature of 80-100 DEG C with the stirring time of 0.5-3 h, and assisting with ultrasonic treatment to make fibers swelled, then washing to remove N-methyl morpholine oxide, adding an auxiliary agent according to a ratio of the mulberry twig powder to the auxiliary agent of 20:1 to make the mulberry twig powder activated, and drying to remove water; then putting the obtained product into a crucible, placing in a tube furnace, adjusting the furnace temperature to 400-500 DEG C, and carrying out heating treatment with nitrogen protection and the treatment time of 1-5 h; and finally, adding fuming sulfuric acid according to a ratio of the mulberry twig powder to a 20% fuming sulfuric acid of 1:1-5, treating, washing to remove impurities, and drying to obtain the mulberry twig-based solid acid. The solid acid has the advantages of small particles, good adsorption property on reaction substrates, good catalytic effect, high thermal stability, high acid value, and low cost, and the raw materials are waste materials.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry and relates to a preparation method of a solid acid, more particularly to a preparation method of a mulberry base solid acid. Background technique [0002] Solid acid is a new type of acid catalyst researched and developed in recent years. Solid acids can usually change the color of basic indicators or can absorb basic groups, but according to the definition of acid-base by Broensted and Lewis, more strictly speaking, solid acids are substances that can donate protons or accept electrons. The acidity characteristics of solid acid surfaces are usually described by acid strength, acid amount and acid center type. [0003] As a potential substitute for liquid acid, solid acid can make the reaction system heterogeneous, making it possible to separate the catalyst from the reaction system by simple means such as centrifugation and filtration, so as to achieve effective recovery of the cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/02
Inventor 李强张大钊季更生冯圆圆屠洁李天程孟春凤
Owner JIANGSU UNIV OF SCI & TECH
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