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A material for adsorbing hexamethyldisiloxane

A technology of hexamethyldisiloxane and structural formula is applied in the field of adsorption hexamethyldisiloxane material and its synthesis, and can solve the problems of small molecular weight, small adsorption capacity, easy volatility and the like

Active Publication Date: 2020-02-21
深圳深态环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of electronics, semiconductors, plastics, silicone rubber, cosmetics, skin care products, detergents, lubricants, insulating materials, etc., hexamethyldisiloxane is often used as a solvent to reduce surface tension. Its molecular weight is small and easy to volatilize. It is an important volatile organic pollutant. Currently, activated carbon is commonly used for treatment. Its adsorption capacity is small and it is easy to be saturated.

Method used

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  • A material for adsorbing hexamethyldisiloxane
  • A material for adsorbing hexamethyldisiloxane
  • A material for adsorbing hexamethyldisiloxane

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Experimental program
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Embodiment 1

[0020] The new material of a kind of efficient adsorption hexamethyldisiloxane of the present application adopts the following steps to synthesize:

[0021] 1) 4-Aminocyclohexanol (100 mmol, AR, Hubei Yuancheng Saichuang Technology Co., Ltd.) was dissolved in a mixture of 80 ml water and 200 ml tetrahydrofuran. The mixture was cooled to 0°C, BOC anhydride (120 mmol) was added, and stirred for 2 hours. 1N Potassium hydrogen sulfate solution (100 mL) was added, followed by extraction with chloroform (200 mL × 2 times). The organic layers were combined, dried over magnesium sulfate, and the organic layer was rotovapped. A mixture of chloroform and hexane (200 mL, 1:2, v / v) was added to the obtained white solid. The suspension was heated until completely dissolved, then stored in a refrigerator at 4 °C overnight, and filtered to obtain a colorless feathery solid (4-BOC-aminocyclohexanol), with a yield of 54%. Elemental Analysis (%) Calculated: C, 61.37; H, 9.83; N, 6.51; O, 22....

Embodiment 2

[0031] experimental device: Figure 5 Medium and high-purity nitrogen gas 2 (50ml / min) was injected into hexamethyldisiloxane (100ml, premium grade, Shanghai Haochong Chemical Co., Ltd.), diluted with high-purity nitrogen gas 1 (200 ml / min, humidified by steam generator) to a certain relative humidity (RH=0%, 20%, 40%, 60%, 80%, the temperature is 30°C), then enter the adsorption tube (the inlet of the adsorption tube is regarded as inflow). The tail gas discharged from the adsorption tube was passed into a 100 ml glass test tube filled with 50 ml of n-dodecane absorption solution (AR, Shanghai McLean Biochemical Technology Co., Ltd.), and the vent was located under the porous plate of the glass sand core (G3, Tianchang City, Anhui Province). Kangpeng Experimental Equipment Co., Ltd.) to disperse air bubbles and promote gas absorption. When there is no adsorbent in the adsorption tube, the average concentration of hexamethyldisiloxane calculated by GC-FID detection is 17.06m...

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Abstract

TiO2 as a photocatalytic material having excellent performance has the most practical prospects in the field of organic waste gas treatment. Hexamethyldisiloxane is a commonly used solvent with high volatility. When TiO2 photocatalytic treatment is performed, hexamethyldisiloxane is oxidized into silica, and the silica is strongly adsorbed on the surface of TiO2 so as to rapidly cause deactivation. According to the present invention, a material for adsorbing hexamethyldisiloxane is synthesized, wherein the synthesis steps comprise: 1) preparing 4-BOC-aminocyclohexanol from 4-aminocyclohexanol; 2) preparing (4-iodo-cyclohexyl)-NBoc from the 4-BOC-aminocyclohexanol; 3) substituting the iodine of the (4-iodo-cyclohexyl)-NBoc with 2,4-pentanedione; 4) carrying out a reaction with hydrazine hydrate; 5) removing amino protection in dilute hydrochloric acid; 6) carrying out a condensation reaction with carbon disulfide; and 7) linking to p-dibenzoic acid and Zn ions to form a product, wherein the product has large adsorption capacity to hexamethyldisiloxane, and can be used for the pretreatment of TiO2 photocatalytic reactions.

Description

technical field [0001] The invention belongs to the field of organic waste gas treatment, and discloses a material for adsorbing hexamethyldisiloxane and a synthesis method thereof. The material is used for pretreatment of organic waste gas photocatalytic treatment and prevents TiO2 from being deactivated during photocatalytic treatment. Background technique [0002] In the production process of electronics, semiconductors, plastics, silicone rubber, cosmetics, skin care products, detergents, lubricants, insulating materials, etc., hexamethyldisiloxane is often used as a solvent to reduce surface tension. Its molecular weight is small and easy to volatilize. It is an important volatile organic pollutant and is currently treated with activated carbon, which has a small adsorption capacity and is easily saturated. Contents of the invention [0003] The scheme of the present invention synthesizes a new material for efficiently adsorbing hexamethyldisiloxane, which has a high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F3/06B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2257/556B01J20/223C07F3/06
Inventor 王晓景何晋勇
Owner 深圳深态环境科技有限公司