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A kind of adsorbent for removing trace benzaldehyde impurity in styrene

A technology of benzaldehyde and styrene, applied in adsorption purification/separation, other chemical processes, chemical instruments and methods, etc., can solve problems such as excessive impurity content, and achieve the effects of low equipment cost, simple operation and good practical value

Active Publication Date: 2016-01-06
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the content of impurities in the current extraction of styrene exceeds the standard, the invention provides an adsorbent for removing trace impurities in styrene. The adsorbent can remove benzaldehyde impurities at normal temperature and pressure, and its specificity, selectivity Strong, high sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Dissolve 1mmol of benzaldehyde in 10mL of chloroform, add 4mmol of functional monomer 4-vinylbenzoic acid, and place it in a shaker for 1h to allow the template molecules to fully interact with the functional monomer.

[0022] Then add 40mmol of cross-linking agent divinylbenzene and 50mg of initiator diphenyl ethyl ketone, after fully dissolving, transfer the mixed solution into a 50mL ampoule bottle, discharge oxygen, and vacuum seal.

[0023] Place the sealed ampoule in a water bath, irradiate with a 1000W high-pressure mercury lamp for 4 hours, and react to produce a hard solid polymer. Grind and sieve the obtained polymer, collect the polymer with a particle size of 75-125 μm, and pump it in Soxhlet Wash the container with a methanol-acetic acid solution with a volume ratio of 8:2 until no benzaldehyde is detected by ultraviolet detection, and then wash away the acetic acid with methanol. The polymer was dried under vacuum at 60 °C for 24 h.

[0024] Examples of a...

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PUM

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Abstract

The invention discloses an adsorbing agent for removing trace benzaldehyde impurities in styrene. The adsorbing agent is prepared by adopting the method comprising the following steps: dissolving template-molecule benzaldehyde in chloroform, then mixing with functional monomers, adding a cross-linking agent and an initiating agent, carrying out anaerobic copolymerization for 3-6 hours in water bath with the temperature of 40-80 DEG C, so as to obtain solid polymer, and then removing benzaldehyde molecules to obtain the absorbing agent, wherein the feeding ratio of benzaldehyde to chloroform is 1mmol to (8-12)mL; the molar ratio of benzaldehyde to functional monomer is 1 to (2-10); the molar ratio of the functional monomers to the cross-linking agent is 1 to (5-20); the feeding ratio of the functional monomers to the initiating agent is 1mmol to (5-25)mg. The adsorbing agent disclosed by the invention has the advantages that the specificity is high, the selectivity is high, the benzaldehyde molecules can be selectively adsorbed from a complex system under the conditions of normal temperature and normal pressure, so that the purposes of separation and purification can be achieved, the application to treatment of practical samples can be achieved, and the purity and the quality of the styrene product are improved.

Description

technical field [0001] The invention relates to a medium material required for a product refining process in the field of petrochemical industry, in particular to an adsorbent for removing trace amounts of benzaldehyde impurities in styrene. Background technique [0002] Styrene is the most used derivative of benzene and the most basic aromatic chemical. It is currently mainly used in the production of various synthetic resins and elastomers. Polystyrene (PS) is the largest downstream derivative of styrene, divided into general-purpose polystyrene (GPPS), high-impact polystyrene (HIPS), and expandable polystyrene (EPS). Other downstream derivatives include acrylonitrile-butadiene-styrene (ABS) resin, styrene-acrylonitrile (SAN) resin, unsaturated polyester resin (UPR), butadiene-styrene rubber (SBR) and Butadiene styrene emulsion (SBL), etc. These products are widely used in automobile manufacturing, household appliances, toy manufacturing, textile, paper making, shoe maki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C07C7/12C07C15/46
Inventor 周如金吕尚庆汤占帅邱松山吴世逵
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH