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Method for determining coexisting impurities and trace arenes in methanol simultaneously

A methanol and impurity technology, applied in the field of simultaneous determination of coexisting impurities and trace aromatics in methanol, can solve problems such as not meeting methanol test requirements, and achieve the effects of saving manpower and material resources, convenient operation, and low detection cost

Inactive Publication Date: 2011-11-23
太仓意发石化矿材检测有限公司
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Problems solved by technology

At present, the limit requirement for the total amount of common aromatics in international trade is no more than 1.0mg / kg, and the existing technology cannot meet the test requirements for methanol quality

Method used

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  • Method for determining coexisting impurities and trace arenes in methanol simultaneously
  • Method for determining coexisting impurities and trace arenes in methanol simultaneously
  • Method for determining coexisting impurities and trace arenes in methanol simultaneously

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Embodiment Construction

[0014] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0015] The invention discloses a method for simultaneously measuring coexisting impurities and trace aromatics in methanol. It uses gas chromatography to analyze methanol, and uses an external standard method to quantitatively measure the content of coexisting impurities and trace aromatics in methanol, wherein the coexisting impurities are methyl acetate Esters, acetone, ethanol, trace aromatics include the following components: benzene, toluene, ethylbenzene, para-xylene, meta-xylene, ortho-xylene, styrene and phenol.

[0016] Specific steps are as follows:

[0017] 1. Preparation of a series of mixed standard solutions:

[0018] (11) Mixed standard mother liquor: Add 0.100 g each of benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, styrene, ...

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Abstract

The invention discloses a method for determining coexisting impurities and trace arenes in methanol simultaneously. In the method, gas chromatography is performed on methanol, and an external standard method is used for quantitatively determining the contents of the coexisting impurities and the trace arenes in the methanol, wherein the coexisting impurities refer to methyl acetate, acetone and ethanol, the trace arenes comprise the following components: benzene, toluene, ethylbenzene, p-xylene, m-xylene, o-xylene, styrene and phenol. The coexisting components and the common arenes types in the methanol are considered in the method simultaneously, thus the simultaneous determination method for the eleven components in the methanol is established in an optimization manner. The simultaneous determination of multiple components is beneficial to saving of manpower and material resources to a great extent, acceleration of the detection speed, and accurate judgment of the polluted arenas types in methanol during storage and transportation. The method has the advantages of convenience for operation, low detection cost, accuracy, sensitivity and high efficiency.

Description

technical field [0001] The invention relates to a detection method of chemical substances, in particular to a method for simultaneously measuring coexisting impurities and trace aromatics in methanol. Background technique [0002] Methanol is widely used and is the basic organic chemical raw material and high-quality fuel. It is mainly used in fine chemical industry, plastics and other fields to manufacture formaldehyde, acetic acid, methyl chloride, methylammonia, dimethyl sulfate and other organic products, and it is also one of the important raw materials for pesticides and medicines. Low molecular weight ketones, alcohols, and esters coexist in methanol, and aromatics in methanol mainly come from pollution during transportation or storage. Aromatic hydrocarbons can cause acute or chronic poisoning to the human body, and are substances related to safety, health and environmental protection. Therefore, the limit of aromatic hydrocarbons has been included in the list of po...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 曹喜焕茅伟刚顾忠盈宋乐林
Owner 太仓意发石化矿材检测有限公司
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