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Method for efficient treatment of waste sulfuric acid produced in gasoline alkylation

A treatment method and alkylation technology, applied in sulfur trioxide/sulfuric acid, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of high energy consumption, high cost, equipment corrosion, etc., and achieve high separation efficiency, Effect of reducing acid consumption and avoiding leakage

Active Publication Date: 2017-07-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process consumes a lot of energy, and the cost is high, and the SO in the cracking furnace gas 3 and moisture will seriously corrode the equipment

Method used

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  • Method for efficient treatment of waste sulfuric acid produced in gasoline alkylation
  • Method for efficient treatment of waste sulfuric acid produced in gasoline alkylation
  • Method for efficient treatment of waste sulfuric acid produced in gasoline alkylation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) The device used: millimeter channel reactor (circular structure of direct current channel module + diamond-shaped mixed structure of enhanced mass transfer channel module), the hydraulic diameter of the channel is 0.5mm, and the number of mixed reaction modules is determined according to the flow rate and reaction residence time. The heat medium is heat conduction oil.

[0024] (2) After the alkylation reaction of the continuous flow reactor is completed, the outlet end of the reactor is connected to a gas-liquid separator to effectively separate the gas-phase alkanes from the acid liquid and alkylated oil, and 80% of the acid hydrocarbons after separation The mass concentration of sulfuric acid is passed into the millimeter channel reactor, the thermal decomposition temperature is controlled between 180°C, and the pressure is controlled at 1.5MPa. The mass concentration of sulfuric acid collected after recovery and concentration can reach 95%, which is used for the ...

Embodiment 2

[0026] (1) Device used: millimeter channel reactor (rectangular structure of direct current channel module + heart-shaped mixed structure of enhanced mass transfer channel module), the hydraulic diameter of the channel is 1mm, the number of mixed reaction modules is determined according to the flow rate and reaction residence time, heat exchange The medium is heat transfer oil.

[0027] (2) After the alkylation reaction in the continuous flow reactor is completed, the outlet end of the reactor is connected to the gas-liquid separator to effectively separate the gas phase alkanes from the acid liquid and alkylate oil, and 82% of the acid hydrocarbons after separation The mass concentration of sulfuric acid is passed into the millimeter channel reactor, the thermal decomposition temperature is controlled between 190 ° C, and the pressure is controlled at 1.8 MPa. The mass concentration of sulfuric acid collected after recovery and concentration can reach 96%, which is used for th...

Embodiment 3

[0029] (1) Equipment used: millimeter channel reactor (circular structure of direct current channel module + triangular mixed structure of enhanced mass transfer channel module), the hydraulic diameter of the channel is 2mm, the number of mixed reaction modules is determined according to the flow rate and reaction residence time, heat exchange The medium is heat transfer oil.

[0030] (2) After the alkylation reaction in the continuous flow reactor is completed, the outlet end of the reactor is connected to the gas-liquid separator to effectively separate the gas phase alkanes from the acid liquid and alkylated oil, and 85% of the acid hydrocarbons after separation The mass concentration of sulfuric acid is passed into the millimeter channel reactor, the thermal decomposition temperature is controlled between 200 ° C, and the pressure is controlled at 2.0 MPa. The mass concentration of sulfuric acid collected after recovery and concentration can reach 96%, which is used for the...

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Abstract

The invention provides a method for efficient treatment of waste sulfuric acid produced in gasoline alkylation and belongs to the field of environment protection. The method has the advantages that after an alkylation reaction of a continuous-flow reactor is finished, through reasonable linkage between a gas-liquid separator and an ideal continuous-flow alkylation reactor, acid / hydrocarbon separation efficiency and precision are improved, low-concentration sulfuric acid obtained after acid / hydrocarbon separation is fed into a millimeter channel reactor, and water and low-boiling-point acid-soluble impurities vaporize, so that waste acid concentration and recovery coupling are achieved, acid consumption is reduced remarkably and recovery rate of the waste acid is increased.

Description

technical field [0001] The invention belongs to the field of environmental protection and relates to a high-efficiency treatment technology for alkylation oil waste sulfuric acid. Background technique [0002] Gasoline is a kind mainly composed of C 4 ~C 12 Transparent flammable liquid composed of aliphatic hydrocarbons, cycloalkanes and a certain amount of aromatic hydrocarbons. Gasoline is one of the most used light petroleum products and is an important fuel for engines. At present, motor gasoline has become the second largest fuel consumption product in my country, of which catalytic cracking gasoline is the main product. With increasingly stringent environmental protection requirements and more stringent restrictions on exhaust emissions, the world represented by the United States has begun to promote clean fuels such as oxygenated fuel and reformulated gasoline. This has made my country's existing gasoline technology face severe challenges and has market prospects. ...

Claims

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Application Information

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IPC IPC(8): C01B17/92B01J19/00
CPCB01J19/0093B01J2219/0081C01B17/92
Inventor 李骁张跃刘李杨莹邱琳卿青刘建武袁卿凯邸俊华石一洲陈迦钰
Owner CHANGZHOU UNIV
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