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Mechanical-activation solid-phase preparation method of lignocellulose ester group oxidation catalyst

A lignocellulose, oxidation catalyst technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the high cost of production and use of heterogeneous catalysts, recovery and regeneration process Complex problems, to achieve the effect of low cost, low production cost, and equipment investment.

Active Publication Date: 2016-03-16
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production and use costs of this heterogeneous catalyst are relatively high, and the recovery and regeneration process is complicated.

Method used

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  • Mechanical-activation solid-phase preparation method of lignocellulose ester group oxidation catalyst

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Experimental program
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Effect test

Embodiment 1

[0037] A kind of mechanical activation solid-phase preparation method of lignocellulose ester-based oxidation catalyst, the preparation method comprises the following steps:

[0038] (1) raw material pretreatment: drying the bagasse fibrous solid waste to a moisture content of less than 15%, pulverizing to obtain a fibrous solid waste powder passing through a 20-mesh sieve;

[0039] (2) High-speed mixing: the fibrous solid waste powder, esterification agent succinic acid and auxiliary agent AlCl 3 Add it to the mixer at a ratio of 100:5:1 and mix evenly to obtain a mixture;

[0040] (3) Mechanically activated solid-phase reaction: Add the above-mentioned mixture into the mechanically activated solid-phase reactor according to the ratio of 100g:200ml of the volume of the milling medium, and perform ball milling reaction at a speed of 200rpm and a constant temperature water bath temperature of 30°C to achieve 0.5h activation After a period of time, stop stirring, take out the e...

Embodiment 2

[0043] A kind of mechanical activation solid-phase preparation method of lignocellulose ester-based oxidation catalyst, the preparation method comprises the following steps:

[0044] (1) Raw material pretreatment: drying cassava distiller's grains fibrous solid waste to a moisture content of less than 10%, pulverizing to obtain fibrous solid waste powder passing through a 25-mesh sieve;

[0045] (2) High-speed mixing: mix the fibrous solid waste powder, esterification agent maleic acid and auxiliary agent KNO 3 Add it to the mixer in a ratio of 100:10:2 and mix evenly to obtain a mixture;

[0046] (3) Mechanically activated solid-phase reaction: add the volume of the above-mentioned mixture into the mechanically activated solid-phase reactor according to the ratio of 100g:250ml, and perform ball milling reaction at a speed of 250rpm and a constant temperature water bath temperature of 35°C to achieve 0.6h activation After a period of time, stop stirring, take out the esterifi...

Embodiment 3

[0049] A kind of mechanical activation solid-phase preparation method of lignocellulose ester-based oxidation catalyst, the preparation method comprises the following steps:

[0050] (1) raw material pretreatment: drying cassava stalk fibrous solid waste to a water content less than 5%, pulverizing to obtain fibrous solid waste powder passing through a 30-mesh sieve;

[0051] (2) High-speed mixing: the fibrous solid waste powder, esterification agent oxalic acid and additive Na 2 CO 3 Add it to the mixer in a ratio of 100:15:3 and mix evenly to obtain a mixture;

[0052] (3) Mechanically activated solid-phase reaction: add the above-mentioned mixture into the mechanically activated solid-phase reactor according to the ratio of 100g:300ml, and perform ball milling reaction at a speed of 300rpm and a temperature of 40°C constant temperature water bath to achieve 0.7h activation After a period of time, stop stirring, take out the esterification product and the balls, and separa...

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Abstract

The invention discloses a mechanical-activation solid-phase preparation method of a lignocellulose ester group oxidation catalyst. The mechanical-activation solid-phase preparation method comprises following steps: cellulosic solid waste is dried and smashed so as to obtain cellulosic solid waste powder; the cellulosic solid waste powder, an esterifying agent, and an accessory ingredient are delivered into a mixing machine for uniform mixing at a ratio of 100:5-40:1-8 so as to obtain a mixture; the mixture and a grinding medium are delivered into a mechanical-activation solid-phase reactor at a ratio of 100g:200-600ml for ball milling reaction at a rotating speed ranging from 200 to 600rpm at 30-60 DEG C constant water bath temperature; after 0.5 to 1.5h of activation, stirring is stopped, and an esterification product and grinding balls are collected, and are separated so as to obtain a lignocellulose ester mixture; and the lignocellulose ester mixture is subjected to pelletizing so as to obtain the lignocellulose ester group oxidation catalyst. The lignocellulose ester group oxidation catalyst contains no heavy metal, possesses catalytic performance, activation oxidation performance, and adsorption performance at the same time, and can be used for selective adsorption of heavy metal and improving decolorizing effect; and at the same time, cost is low because that the raw materials are solid wastes, the preparation method is simple, and adding amount is low.

Description

technical field [0001] The invention belongs to the field of lignocellulose modification, in particular to a preparation method and application of a heavy metal-free lignocellulose ester-based oxidation catalyst used for degradation of organic wastewater. Background technique [0002] With the rapid development of the chemical industry and its related industries, especially the development of chemical industry, pesticide, medicine, papermaking, printing and dyeing, metallurgy and other industries, a large amount of industrial wastewater is discharged outside the standard, causing more than one third of the country's river sections to be polluted , more than 90% of urban waters are seriously polluted, and nearly 50% of key urban water sources do not meet drinking water standards. Among them, the types and quantities of organic wastewater are increasing day by day. These refractory organic pollutants exist in water for a long time, have a wide range of migration, and are diffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08B31/18C02F1/72
CPCC02F1/725C02F1/727C08B31/18C08H6/00
Inventor 黄祖强张燕娟甘涛覃宇奔胡华宇覃廖青伍娟黄爱民杨梅覃杏珍沈芳冯振飞
Owner GUANGXI UNIV
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