Regeneration method for alkylated waste sulfuric acid

A technology for alkylating waste sulfuric acid and waste sulfuric acid, applied in sulfur trioxide/sulfuric acid, chemical instruments and methods, chemical recovery, etc., can solve the problems of combustion boiler system corrosion, high maintenance cost of equipment, complicated process, etc. Low operating energy consumption, low device maintenance cost, and low reaction temperature

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The disadvantage of this method is that the polymer oil contains a small amount of sulfuric acid, and it can be directly used as fuel oil, which will cause corrosion of the combustion boiler system
[0009] The process of pyrolysis method is complicated, and the cracking furnace part must maintain high temperature (1000°C~1100°C), so the energy consumption is high, the investment is large, and the maintenance cost is high
In addition, in

Method used

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  • Regeneration method for alkylated waste sulfuric acid

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Embodiment Construction

[0020] A kind of method of regeneration alkylation waste sulfuric acid provided by the invention is specifically implemented like this:

[0021] A method for regeneration of alkylated waste sulfuric acid, characterized in that under redox conditions, waste sulfuric acid is contacted with an oxidation aid, and organic matter or tiny carbon particles in the waste sulfuric acid react with an oxidant to be converted into CO 2 , N 2 、H 2 O, after being removed by stripping, regenerated sulfuric acid is obtained.

[0022] In the method provided by the invention, the oxidizing agent is selected from H 2 o 2 , O 3 、HNO 3 and a mixture of one or more of NOx. The oxidizing agent preferably adopts HNO 3 , more preferably HNO with a mass percent concentration of 65wt% 3 .

[0023] In the method provided by the present invention, the oxidation aid is selected from one or more of aluminum silicate, silicon dioxide and alumina pellets.

[0024] In the method provided by the inventi...

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Abstract

Provided is a regeneration method for alkylated waste sulfuric acid. The regeneration method comprises: under redox conditions, waste sulfuric acid and oxidants are contacted, organic matters or tiny carbon particles in the waste sulfuric acid are reacted with the oxidants and converted into CO2, N2 and H2O, after steam stripping removal, regenerated sulfuric acid is obtained. The method can be carried out at a low pressure and at a low temperature, device operation energy consumption is low, investment is saved, operation is simple, and device maintenance cost is low.

Description

technical field [0001] The invention relates to a regeneration method for high-concentration waste sulfuric acid containing organic matter. More specifically, it relates to the regeneration method of the spent concentrated sulfuric acid catalyst in the process of generating high-octane gasoline components through the alkylation reaction of low-carbon olefins and low-carbon alkanes. Background technique [0002] In the process of petroleum refining industry, concentrated sulfuric acid is often used as a catalyst for the alkylation reaction of low-carbon hydrocarbon molecules. More specifically, C2~C5 olefins and isobutane undergo an alkylation reaction under the catalysis of 98% concentrated sulfuric acid, and the resulting alkylated oil is sulfur-free, aromatic-free, and has a high octane number, which is a high-quality high-octane oil Gasoline blending components. During the alkylation reaction, moisture, sulfur and nitrogen compounds, and side reaction products in the ra...

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Application Information

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IPC IPC(8): C01B17/90B01J27/30
CPCY02P20/584
Inventor 董明会温朗友俞芳郜亮喻惠利
Owner CHINA PETROLEUM & CHEM CORP
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