Adsorbent for removing trace halides in gas as well as preparation method and application thereof

A halide and adsorbent technology, applied in chemical instruments and methods, separation methods, alkali metal compounds, etc., to achieve the effects of long service life, high dispersion and stability, and high adsorption activity

Active Publication Date: 2011-04-06
JIANGSU SOPO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the technology for removing halogenated hydrocarbons in gas, especially the removal technology of traces of lower halogenated hydrocarbons in gas.

Method used

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  • Adsorbent for removing trace halides in gas as well as preparation method and application thereof
  • Adsorbent for removing trace halides in gas as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1. Preparation of adsorbent

[0032] The polymer precursor is a polymer ball obtained by suspension copolymerization of vinylidene chloride and acrylonitrile, and the molar content of acrylonitrile in the vinylidene chloride is 1.0%. Ultrafine bentonite was used as synthesis template and dispersed phase. Add the mixture of the two monomers (containing 1.5% molar content of azobisisoheptanonitrile) dropwise into the saturated aqueous sodium sulfate solution under stirring, and the polymerization reaction is continued at 45°C and the stirring speed is 500r / min. for 10h. The obtained copolymer pellets were washed with distilled water to remove bentonite on the surface, and washed with hot acetone to remove residual monomers. Carbonization of the polymer pellets takes place in a quartz tube, heated by a temperature-programmed electronic furnace. After treatment at 175 °C for 16 h, the heating temperature was increased to 300 °C at a rate of 1 °C / min and kept a...

Embodiment 2

[0035] The adsorbent prepared in Example 1 was packed in a fixed-bed reactor with a volume of 1 L, and the aspect ratio of the reactor was 3. Nitrogen containing 0.1% of the molar content of monochloromethane is passed through the reactor, the flow rate of the gas is controlled at 3L / min, the temperature of the reactor is 50°C, and the gas flowing out of the reactor is monitored by gas chromatography, and the halogenated gas in the gas is The efficient removal rate of hydrocarbons is 99.98%.

Embodiment 3

[0037] The adsorbent prepared in Example 1 was packed in a fixed-bed reactor with a volume of 1 L, and the aspect ratio of the reactor was 3. Argon gas containing chloroform molar content of 0.05% is passed through the reactor, the flow rate of the gas is controlled to 2L / min, the temperature of the reactor is 50°C, and the gas flowing out of the reactor is monitored by gas chromatography, the halogen in the gas The efficient removal rate of substituted hydrocarbons is 99.99%.

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PUM

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Abstract

The invention relates to an adsorbent for removing trace halides in gas as well as a preparation method and application thereof. With respect to the adsorbent for removing the trace halides in the gas, the active sites of the adsorbent are metal silver particles, and the carrier is nitrogen-modified microspheric activated carbon, wherein the load amount of silver is 0.1-2.0wt%. The preparation method comprises the steps of: 1, suspending and copolymerizing partial chloroethylene and acrylonitrile to obtain a polymer spherule; 2, carbonizing the polymer spherule; and 3, introducing a silver compound precursor into the microspheric type active carbon carrier through an isopyknic immersion method to obtain the adsorbent for removing the trace halides in the gas. The special structure of the microspheric type composite material is beneficial to the mass transfer and heat transfer in an adsorption process and also beneficial to the dispersion and stabilization of adsorption active sites, i.e. the metal silver particles. The adsorbent can be used for efficiently removing the trace amount of halogenated hydrocarbons, i.e. chlorinated matters, brominated matters and iodo matters of C1-C4 alkane, in the gas by using a fixed bed adsorption method.

Description

technical field [0001] The invention belongs to the fields of chemical industry and environment, and mainly relates to a method for removing halides in air or chemical industry process gas. Background technique [0002] Halogenated hydrocarbons are hydrocarbon A compound formed after the hydrogen atoms in the molecule are replaced by halogens (fluorine, chlorine, bromine, iodine). According to the different substituted halogens, they are called fluorocarbons, chlorinated hydrocarbons, bromohydrocarbons and iodohydrocarbons; they can also be divided into monohalogenated hydrocarbons, dihalogenated hydrocarbons and polyhalogenated hydrocarbons according to the number of halogen atoms in the molecule ; It can also be divided into saturated halogenated hydrocarbons, unsaturated halogenated hydrocarbons and aromatic halogenated hydrocarbons according to the different hydrocarbon groups. In addition, it can also be divided into primary halogenated hydrocarbons RCH according to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/04
Inventor 宋勤华邵守言许宝华凌晨曹宏兵
Owner JIANGSU SOPO CHEM
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