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Method for catalyzing alkylated waste sulfuric acid through lignocellulose ester

A technology for alkylating waste sulfuric acid and lignocellulose, applied in chemical instruments and methods, sulfate preparations, chemical/physical processes, etc., can solve problems such as failure to achieve complete degradation and failure to fully degrade and remove waste sulfuric acid organic matter effectively. , to achieve the effect of enhancing oxidation and improving decolorization effect

Active Publication Date: 2016-04-20
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot completely and effectively degrade and remove organic matter in waste sulfuric acid, and cannot achieve complete degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:

[0030] (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;

[0031] (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;

[0032] (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 obta...

Embodiment 2

[0035] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:

[0036] (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;

[0037](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;

[0038] (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 lig...

Embodiment 3

[0041] The preparation of lignocellulose ester catalyst, this preparation method comprises the following steps:

[0042] (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;

[0043] (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;

[0044] (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;

[0045] (4...

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PUM

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Abstract

Provided is a method for catalyzing alkylated waste sulfuric acid through lignocellulose ester. The method comprises the steps that the alkylated waste sulfuric acid is added to metallic oxide or hydroxide to react till the pH value is weak acidic, then catalyst lignocellulose ester and an oxidizing agent are added for a redox reaction, and organic matter in the alkylated waste sulfuric acid is converted into CO2, H2O, N2 and other harmless micromolecular matter. Obtained reaction liquid generated after oxydative degradation and decoloration is refined to be prepared into inorganic salt. Selected lignocellulose ester has a catalyzing function, and has the functions of activating the oxidizing agent and achieving adsorption decoloration. Other impurities are not introduced in the production process, secondary pollution cannot be caused, the organic matter in the waste acid is oxidized to be degraded, all mother liquor is cyclically utilized, and product quality cannot be influenced, and reaches the quality standard of the feed grade and the industrial grade. The production process is easy to operate, safe and reliable, operation is carried out at normal pressure, and investment is reduced. The lignocellulose ester catalyst can be biodegraded, and can serve as a raw material of biofertilizer, and no three wastes are discharged in the production process.

Description

technical field [0001] The invention belongs to the field of organic waste water treatment, in particular to a method in which lignocellulose ester is used as an oxidation catalyst to treat alkylation waste sulfuric acid. Background technique [0002] With the improvement of international requirements for fuel oil, the alkylation method is widely used in refineries to produce isooctane, and the output is increasing rapidly. When using an alkylation unit to process and produce high-octane alkylated gasoline, sulfuric acid with a concentration of 98% must be used as a catalyst. Every ton of alkylated gasoline produced will produce 80-100kg of waste sulfuric acid, which contains 90 % of sulfuric acid, about 7% of organic matter and about 3% of water. The organic substances are mainly polymer olefins, diolefins, alkylsulfonic acids, sulfuric acid esters, and sulfides. These substances have dark color, sticky texture, and irritating odor, and it is difficult to completely remove...

Claims

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Application Information

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IPC IPC(8): C01B17/96B01J31/06C05F7/00
CPCB01J31/06C01B17/96C05F7/00Y02A40/20
Inventor 黄祖强甘涛张燕娟林国友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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