Absorbing emulsion of volatile organic compounds (VOCs) and preparation method of absorbing emulsion

An organic compound, volatile technology, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., to achieve good stability, less air bubbles, and good absorption effect

Inactive Publication Date: 2013-12-25
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in existing absorbents, the present invention provides a VOCs absorbent, the composition is a W / O / W type multiple emulsion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 0.3g lipophilic emulsifier Span-80 dropwise into 30ml white oil and mix thoroughly, heat to 20°C in a water bath, then slowly add 10ml internal water phase into it, stir for 5min to emulsify, and make W / O type Emulsion is used as the first phase; add 0.5g of hydrophilic emulsifier Tween-80 dropwise to 60ml of the outer water phase in which 0.3g of phosphate is dissolved, and mix well, and then add dropwise the initial preparation of emulsion to the layer containing hydrophilic emulsifier In the external water phase, after stirring for 5 minutes, the volatile organic compound absorption emulsion of W / O / W multiple emulsion is prepared, the volume of the internal water phase is 30%, the volume of the external water phase is 70%, and the viscosity is 4.1cp (20 ℃ ). The gas absorption device is built and assembled by the laboratory itself. The process is that the dry air is divided into two paths by two gas mass flow controllers (MFC), one path enters the toluene gas gen...

Embodiment 2

[0019] Add 0.7g lipophilic emulsifier Span-80 dropwise into 70ml white oil and mix thoroughly, heat to 60°C in a water bath, then slowly add 10ml inner water phase to it, stir for 20min to emulsify, and make W / O type The emulsion is used as the first phase; add 0.3g of hydrophilic emulsifier Tween-80 dropwise into 20ml of the outer aqueous phase dissolved with 0.1g of sodium silicate and mix well, and then add dropwise the initial preparation of the emulsion until it contains the hydrophilic emulsifier In the external water phase of the agent, after stirring for 60min, the volatile organic compound absorption emulsion of the W / O / W type multiple emulsion is obtained, the volume of the internal water phase is 65%, the volume of the external water phase is 25%, and the viscosity is 18.2cp (20 ℃). The experimental device and absorption process are the same as in Example 1. The gas flow rate through the toluene gas generator is 0.1L / min, and the other air flow rate is 1L / min. Meas...

Embodiment 3

[0021] Add 5g of lipophilic emulsifier Span-80 dropwise into 50ml of white oil and mix thoroughly, heat to 30°C in a water bath, then slowly add 20ml of the inner water phase into it, stir for 30min to emulsify, and obtain a W / O emulsion liquid as the first phase; add 5g of hydrophilic emulsifier Tween-80 dropwise into the outer water phase of 30ml of 0.5g of sodium carbonate and mix well, then add dropwise the emulsion to the outer phase containing the hydrophilic emulsifier In the water phase, after stirring for 30 minutes, the volatile organic compound absorption emulsion of W / O / W multiple emulsion is prepared, the volume of the inner water phase is 45%, the volume of the outer water phase is 55%, and the viscosity is 13.3cp (20°C). The experimental device and absorption process are the same as in Example 1. The gas flow rate through the toluene gas generator is 0.1L / min, and the other air flow rate is 1L / min. Measure 50ml of composite absorbent and put it into a 100ml bubb...

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PUM

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Abstract

The invention discloses a formula of an absorbing emulsion of volatile organic compounds (VOCs). The absorbing emulsion is a W/O/W (Water/Oil/Water) multiple emulsion and comprises the main components: white oil, water, emulsifying agents (Tween-80 and Span-80) and inorganic salt (sodium silicate, sodium phosphate and sodium carbonate), wherein the volume ratio of the white oil to the water is 1: (3/7-7/3), the total mass of the emulsifying agents (Tween-80 and Span-80) is 1-10% (g/ml) of the total volume of mineral oil-water, and the total mass of the inorganic salt is higher than the total volume of the mineral oil-water by less than 1% (g/ml). According to the formula, the absorbing emulsion of the VOCs has the advantages of simple preparation method, high absorption rate of the VOCs, good dispersibility, regeneration, low regeneration cost and the like. The invention also discloses a preparation method of the absorbing emulsion.

Description

technical field [0001] The present invention generally relates to emulsion compositions for absorbing volatile organic compounds (VOCs). Background technique [0002] Air pollution is one of the urgent environmental problems facing our country, and a large amount of industrial waste gas discharged every year is an important source of air pollutants. A large amount of industrial waste gas enters the atmospheric environment, which will inevitably lead to a decline in the overall air quality, which in turn will bring harm to human health. to great harm. VOCs are one of the main components of air pollutants, and the country has strict control requirements for the emission of VOCs in industrial processes. At present, there are many methods for VOCs waste gas treatment, among which the absorption method can not only absorb gaseous pollutants, but also convert pollutants into useful products. In the 1970s and 1980s, diesel-based absorbents were used to absorb benzene-containing w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCY02A50/20
Inventor 张锋巫先坤孟为民张志炳颜久娟
Owner NANJING UNIV
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