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Method for removing nitrate ions in toluene by using diatomite

A technology of nitrate ions and diatomaceous earth, applied in the direction of adsorption purification/separation, organic chemistry, etc., to achieve the effects of low cost, low dosage and remarkable effect

Inactive Publication Date: 2015-06-10
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And originate in the industrial toluene of domestic manufacturer, the content of nitrate ion is about 5000ppb, do not see the method for removing nitrate ion in toluene so far no relevant patent or document report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 100ml of toluene (Shanghai Baosteel Chemical Co., Ltd., industrial grade) was passed through a clean glass column filled with 14g of diatomaceous earth (Shanghai Fengxian Fengcheng Reagent Factory, chemically pure). Collect the toluene. NO before adsorption 3 - The content is 5000ppb, NO in the toluene after adsorption 3 - The content is 300ppb.

Embodiment 2

[0016] Flow 100m1 of toluene (Shanghai Baosteel Chemical Co., Ltd., industrial grade) through a clean glass column filled with 10g of diatomite (Shanghai Fengxian Fengcheng Reagent Factory, chemically pure). Collect the toluene. NO before adsorption 3 - The content is 5000ppb, NO in the toluene after adsorption 3 - The content is 365ppb.

Embodiment 3

[0018] 100ml of toluene (Shanghai Baosteel Chemical Co., Ltd., industrial grade) was passed through a clean glass column filled with 8g of diatomaceous earth (Shanghai Fengxian Fengcheng Reagent Factory, chemically pure). Collect the toluene. NO before adsorption 3 - The content is 5000ppb, NO in the toluene after adsorption 3 - The content is 398ppb.

[0019] The toluene from which nitrate ions are removed by the present invention is then removed from the remaining impurities in the toluene by the prior art and other ways to form a multi-purpose high-purity toluene reagent that can be applied to ULSI and FPD.

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Abstract

The invention discloses a method for removing nitrate ions in toluene used for ULSI / FPD, which is characterized in that nitrate ions are removed by diatomite with 0.10-0.17 times of weight ratio from toluene used for industry under room temperature. The method comprises the advantages of simple operation, obvious effect, easily available material and low cost.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for removing nitrate ions in toluene by using diatomite. Background technique [0002] Toluene is widely used as an organic solvent and high-octane gasoline additive, and is also an important organic chemical raw material. Industrial toluene is mainly obtained from the fractionation of coal tar or the aromaticization of petroleum. The impurities in it mainly include benzene, xylene, methylthiophene and other sulfides or nitrides, olefins and series of anions and cations. In order to achieve the purpose of purification, patent CN101696146A reports a method for purifying toluene for microelectronics industry by using clay. Patent CN102964200A adopts Purification of coked toluene with molecular sieves or acidic alumina. Patent CN1317245C studies the purification method of toluene containing nitrogen and olefins, and uses cation exchange resin and acid clay i...

Claims

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Application Information

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IPC IPC(8): C07C15/06C07C7/12
Inventor 汤杰常亮杨帆石敏戴龙华
Owner EAST CHINA NORMAL UNIVERSITY