Method for preparing aluminum sulfate by catalyzing alkylated waste sulfuric acid with lignocellulose ester
A technology for alkylating waste sulfuric acid and lignocellulose, applied in the fields of aluminum sulfate, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high process cost, expensive oxidant, incomplete decolorization, etc., and achieve enhanced oxidation of the system function, improve the effect of decolorization effect
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Embodiment 1
[0031] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:
[0032] (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;
[0033] (2) High-speed mixing: Add fibrous solid waste powder, esterification agent succinic acid and auxiliary agent AlCl3 to the mixer in a ratio of 100:5:1 and mix evenly to obtain a mixture;
[0034](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 esterification product and the balls, and separate them to obtain a ligno...
Embodiment 2
[0037] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:
[0038] (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;
[0039] (2) High-speed mixing: mix fibrous solid waste powder, esterification agent maleic acid and auxiliary agent Al(NO 3 ) 3 Add it to the mixer in a ratio of 100:10:2 and mix evenly to obtain a mixture;
[0040] (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 esterification product and the balls, and separate them to obtain a...
Embodiment 3
[0043] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:
[0044] (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;
[0045] (2) High-speed mixing: the fibrous solid waste powder, esterification agent oxalic acid and auxiliary agent Al 2 (SO4) 3 Add it to the mixer in a ratio of 100:15:3 and mix evenly to obtain a mixture;
[0046] (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 separate them to obtain a lignocellulose ester mixture;
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