Treatment technology of producing sulfuric acid from alkylated spent sulfuric acid through high temperature decomposition

A technology for alkylation of waste sulfuric acid and high-temperature cracking, applied in the direction of sulfur trioxide/sulfuric acid, etc., can solve the problem of not introducing the process in detail, and achieve the effect of avoiding secondary pollution

Active Publication Date: 2006-03-29
PETROCHINA CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The British patent GB596386 only introduces the method of atomizing the acid and spraying the acid mist into the heating furnace, and then thermally decomposing the waste sulfuric acid, without introducing the next step in detail

Method used

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  • Treatment technology of producing sulfuric acid from alkylated spent sulfuric acid through high temperature decomposition

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Experimental program
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Effect test

Embodiment Construction

[0036] The components of waste sulfuric acid are shown in Table 1, the amount of spent acid entering the cracking furnace is 1.13 tons / hour, the operating indicators are shown in Table 3, and the sulfuric acid products are shown in Table 2.

[0037] project

[0038] Concentration%

[0039] project

[0040] project

[0041] Concentration%

[0042]

[0043] Conversion rates%

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Abstract

A process for preparing sulfuric acid from used alkylating sulfuric acid by high-temp cracking includes such steps as heating to 1000-1100 deg.C, cracking, acid washing for cleaning, converting twice by contact method, and absorbing twice to obtain qualified sulfuric acid for reuse. It has high recovering rate.

Description

technical field [0001] The invention relates to pyrolysis of waste sulfuric acid at high temperature, adiabatic humidification and pickling purification, and two-turn and two-suction processes. Specifically, it provides a process that can protect the environment, and can produce 98% qualified concentrated sulfuric acid at the same time, which can be used for alkylation again. Alkylation waste sulfuric acid that realizes circulation with the alkylation unit is produced by pyrolysis to produce sulfuric acid treatment process. Background technique [0002] At present, there are many methods for waste acid treatment, among which there are three main methods: ① thermal cracking of waste sulfuric acid to produce SO2, SO3, sulfuric acid or recover sulfur S. ②Waste sulfuric acid is diluted, ionized or hydrolyzed, and then separated to remove organic impurities to obtain pure sulfuric acid. ③Use the waste sulfuric acid and waste ammonia water of the alkylation unit to produce ammoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/69
Inventor 钱新华于凤和夏丽萍曾严罗强李宏冰高卫亭张宏达隋新
Owner PETROCHINA CO LTD
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