Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method that utilizes yellow phosphorus tail gas to prepare ethylene glycol and recover iodine

A yellow phosphorus tail gas, ethylene glycol technology, applied in the carbon dioxide reduction method preparation, iodine, carbon monoxide and other directions, can solve the problems such as no report on the iodine recovery process, improve the recovery rate and the output of iodine, and reduce the recovery cost and cost reduced effect

Active Publication Date: 2018-03-23
贵州鑫新实业控股集团有限责任公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But, although there are above-mentioned multiple iodine recovery techniques and methods in the prior art, the recovery process of iodine in the yellow phosphorus tail gas has not been reported yet.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method that utilizes yellow phosphorus tail gas to prepare ethylene glycol and recover iodine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , the yellow phosphorus tail gas from the yellow phosphorus production workshop is sent to the PSA device, and the carbon dioxide in the yellow phosphorus tail gas is removed through the pressure swing adsorption to obtain the decarbonated waste gas, and then the decarbonated waste gas is sent to another PSA device , and then through the effect of pressure swing adsorption, the carbon monoxide in the decarbonation waste gas is removed to obtain pure carbon monoxide and decarbonization waste gas. After the pure carbon monoxide gas is compressed by a compressor, it is sent to the ethylene glycol production workshop; After the carbon monoxide exhaust gas is treated, its flow rate is controlled at 1dm 3 / min is sent into the iodine absorption tank in the iodine recovery workshop, and the temperature in the iodine absorption tank is controlled to be 60°C. The iodine absorption tank is equipped with a mass percentage concentration of 1% strong oxidant, wherei...

Embodiment 2

[0025] Such as figure 1 , the yellow phosphorus tail gas from the yellow phosphorus production workshop is sent to the PSA device, and the carbon dioxide in the yellow phosphorus tail gas is removed through the pressure swing adsorption to obtain the decarbonated waste gas, and then the decarbonated waste gas is sent to another PSA device , and then through the effect of pressure swing adsorption, the carbon monoxide in the decarbonation waste gas is removed to obtain pure carbon monoxide and decarbonization waste gas. After the pure carbon monoxide gas is compressed by a compressor, it is sent to the ethylene glycol production workshop; After the carbon monoxide exhaust gas is treated, its flow rate is controlled at 500dm 3 / min is sent in the iodine absorption tank in the iodine recovery workshop, and the temperature in the iodine absorption tank is controlled to be 80°C, and the mass percentage concentration is 70% strong oxidant is housed in the iodine absorption tank, whe...

Embodiment 3

[0027] Such as figure 1 , the yellow phosphorus tail gas from the yellow phosphorus production workshop is sent to the PSA device, and the carbon dioxide in the yellow phosphorus tail gas is removed through the pressure swing adsorption to obtain the decarbonated waste gas, and then the decarbonated waste gas is sent to another PSA device , and then through the effect of pressure swing adsorption, the carbon monoxide in the decarbonation waste gas is removed to obtain pure carbon monoxide and decarbonization waste gas. After the pure carbon monoxide gas is compressed by a compressor, it is sent to the ethylene glycol production workshop; After the carbon monoxide exhaust gas is treated, its flow rate is controlled at 400dm 3 / min is sent in the iodine absorption tank in the iodine recovery workshop, and the temperature in the iodine absorption tank is controlled to be 70°C, and the mass percentage concentration is equipped with a 60% strong oxidant in the iodine absorption tan...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of recovering iodine from yellow phosphorus tail gas, in particular to a method for recovering iodine from yellow phosphorus tail gas by preparing ethylene glycol. The carbon monoxide is removed by the method, so that the relative content of iodine is improved, so that the iodine content in the yellow phosphorus tail gas has a higher concentration before entering the iodine recovery process, which reduces the difficulty of recovering iodine; combined with the iodine recovery process, A strong oxidant is used, and the iodine-containing waste gas is passed into the strong oxidant, so that the iodine component in the waste gas is completely oxidized into iodate, and after the concentration reaches 600ppm or more, it is sent to the iodine analysis tank, and the reduction method is used. The agent reduces the iodate radical to iodine element and precipitates it, thereby reducing the cost of recovering iodine in the yellow phosphorus tail gas; and in the whole process, it reduces the difficulty of controlling the degree of oxidation treatment of the iodine component, thereby reducing the cost.

Description

technical field [0001] The invention relates to the technical field of recovering iodine from yellow phosphorus tail gas, in particular to a method for preparing ethylene glycol from yellow phosphorus tail gas and recovering iodine. Background technique [0002] In the yellow phosphorus production process, hundreds of millions of standard square meters of yellow phosphorus tail gas are discharged every year, and according to analysis and detection, yellow phosphorus tail gas contains a large amount of rare element iodine, so a large amount of rare element iodine will be produced during the discharge process Therefore, the recovery of the rare element iodine in the yellow phosphorus tail gas has become a key link in the yellow phosphorus production industry, and it is also one of the technical means to reduce the yellow phosphorus tail gas emissions and reduce the environmental pollution rate. [0003] In the prior art, the technology for iodine recovery mainly focuses on rec...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/14C01B32/40C07C29/15C07C31/20
Inventor 姜国强甘立炜汤贤龙龙从举
Owner 贵州鑫新实业控股集团有限责任公司