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Sulfonated tail gas cycle-absorption method and cycle-absorption system

A technology of tail gas circulation and sulfonation, applied in chemical instruments and methods, separation methods, formation/introduction of sulfonic acid groups/dihydroxysulfonyl groups, etc., can solve the problem of increasing production investment, material waste, and large investment in electrostatic demister devices. , low gas utilization rate, etc., to achieve the effect of reuse, easy direct or indirect utilization, and avoidance of intractable treatment

Active Publication Date: 2012-01-18
ZANYU TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process can effectively remove SO from tail gas 3 gas, but it also increases production investment and material waste, and there is SO 3 Problems such as low gas utilization
If the newly added electrostatic defogging device has large investment, large equipment volume and high failure rate
In particular, the electrostatic waste acid produced after being treated by the electrostatic demister contains a large amount of persulfonated organic matter and sulfate substances, which makes its use value low and it is more difficult to further process

Method used

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  • Sulfonated tail gas cycle-absorption method and cycle-absorption system
  • Sulfonated tail gas cycle-absorption method and cycle-absorption system

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Circulation absorption and utilization of sulfonated tail gas in the production of fatty acid methyl ester sulfonate (MES): set the temperature of the heat exchanger inside the tail gas circulation absorption device at 85-95 °C. Close the discharge valve at the bottom of the gas circulation absorption device, and feed the easily sulfonated substance α-olefin (AO) into the bottom feed port of the gas circulation absorption device, and the flow rate is controlled at 100kg / h. Open the atomizing nozzle to atomize the α-olefin in the atomizing area of ​​the tail gas circulation absorption device and settle into the packing layer. After the organic material is transported to the tail gas circulation absorption device for 20 minutes, close the external α-olefin feed to make the system form a cycle of organic material feeding, open the bottom valve of the tail gas circulation absorption device, and let the α-olefin flow at a rate of 100kg / h The rate is delivered to the top atom...

Embodiment 2

[0035] Circulation absorption and utilization of sulfonated tail gas in the production of 20 tons of fatty acid methyl ester sulfonate (MES): set the temperature of the internal heat exchanger of the tail gas circulation absorption device at 85-95 °C. Close the discharge valve at the bottom of the gas circulation absorption reaction device, and feed the rapeseed oil to be sulfonated at the feed port at the bottom of the tail gas circulation absorption device, and the flow rate is controlled at 3t / h. Open the atomizing nozzle to atomize the rapeseed oil on the upper part of the exhaust gas circulation absorption device and settle into the packing layer. After 5 minutes, close the external rapeseed oil feed, open the bottom valve of the tail gas circulation absorption device, so that the rapeseed oil is transported to the top atomizing nozzle again through the material pump at a flow rate of 3t / h. Afterwards, run the sulfonation unit and the gas-liquid separation unit to make th...

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Abstract

The invention relates to a novel process for cycle-absorbing and reusing sulfonated tail gas, belonging to the technical field of surfactant producing processes and aiming at providing a method which has reasonable design and simple operation and is suitable for the cycle-absorption and recovery of various sulfonated SO3 tail gases and a relative processing system. The technical solution of the invention comprises the following steps: A. mixture material resulted from the contact reaction of SO3 and organic material 1 in a sulfonator enters a gas liquid separation device; B. after the supplementary heating, the separated SO3 gas reacts with the organic material, and then a corresponding sulfonated product is generated; C. the sample of the generated sulfonated product is output for test; material discharge can be carried out upon the qualification, and the residual SO3 gas is discharged after the demisting; otherwise, the sulfonated product and the SO3 gas are subjected to a contact reaction again; and D. the residual SO3 gas output to a demister is output by the demister after being demisted, and then discharged after tail gas treatment.

Description

technical field [0001] The utility model relates to a new technology for circular absorption and reuse of sulfonated tail gas, which belongs to the technical field of surfactant production technology. Background technique [0002] In the surfactant industry, anionic surfactants are the earliest developed, largest and most widely used products. gas phase SO 3 (Sulfur trioxide) is a process for sulfonating organic materials with sulfonating agents, and is currently the most widely used process technology for the production of anionic surfactants. Thanks to SO 3 It is a high-polluting substance. In the sulfonation process, it is necessary to fully consider the recovery and treatment of sulfonation tail gas. In the traditional sulfonation process, the material after sulfonation and excess SO 3 The gas is separated by a gas-liquid separation system. isolated SO 3 Gas (including some SO 2 Gas) are absorbed and treated by electrostatic demister, alkali spray device and acid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07B45/02B01D53/14B01D53/18
Inventor 方银军林良旭胡剑品邹欢金秦志荣冯晚静
Owner ZANYU TECH GRP CO LTD
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