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Method for measuring distillate quantity of crude benzole before 180 DEG C

A technology of crude benzene and forward distillation, which is applied in the field of measuring the distillate amount of crude benzene before 180°C, to reduce the degree of damage, reduce work intensity, and shorten the analysis period

Inactive Publication Date: 2011-11-23
新疆八一钢铁股份有限公司炼钢厂
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Problems solved by technology

The crude benzene distillation test is the most frequent test item in the production and processing of crude benzene. Although the accuracy is high, there are problems such as large sampling volume, long analysis time (60 minutes), and the gasification process during sample analysis seriously pollutes the working environment and damages analysts. health issues
Especially when a large number of samples need to be analyzed in a short time, the crude benzene distillation test cannot meet the requirements

Method used

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Embodiment Construction

[0018] A method for measuring the distillate amount of crude benzene before 180°C, the steps are as follows:

[0019] (1) Select the measuring device: Beijing Dongxi Electronics 2 GC4004A gas chromatograph (equipped with chromatography workstation), hydrogen generator (SPH-300) and air pump (SPB-3);

[0020] (2) Selection of chromatographic column: For the analysis of benzene series, the stationary liquid Apiezon L (Apiezon L): support (6201)=10%, the length of the chromatographic column is 3 meters; the stationary liquid Apiezon L is uniform Paint on the 6201 carrier of 60-80 meshes, weigh 5 grams of apisonone L, dissolve it in chloroform, add 50 grams of 6201 carrier, turn it constantly, and after drying, pump it into a chromatographic column with an inner diameter of 3-4 mm and a length of 3 m through a vacuum pump. Column, put on the chromatograph and age for at least 16 hours, stand-by;

[0021] (3) Calculation of bulky components: use the area normalization method for ...

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Abstract

The invention discloses a method for measuring distillate quantity of crude benzol before 180 DEG C. The method comprises the following steps of: 1, selection of a measuring device; 2, selection of a chromatographic column: for the analysis of the benzene serial matters, the ratio of a fixation fluid Apiezon L to a supporter(6201) is 10 percent, and the length of the chromatographic column is 3m;3, calculation of components of the crude benzol: the area normalization method is selected for calculation; 4, apparatus conditions: the column temperature is the temperature programming and is raised from 140 to 180 DEG C, the vaporizing and the conversion temperatures are 180 DEG C, the carrier gas and the fuel gas are highly purified hydrogen gas, the pressure of the hydrogen gas is 0.20MPa, the pre-column pressure is 0.05MPa, the air pressure is 0.20MPa, and the sample size is 1.5 microliter; and 5, a large number of qualitative and quantitative analysis tests on the crude benzol according to the conditions: the benzene serial matters are completely distilled before 5 minutes, and the calculation method adopts that the distillate quantity (percent) of the crude benzol before 180 DEG C is equal to 100 minus the summation of area percents of all chromatographic peaks after 5 minutes.

Description

technical field [0001] The invention relates to a gas physical detection method, in particular to a method for measuring the distillate amount of crude benzene before 180°C. Background technique [0002] For a long time, the national standard GB / T2282-2000 (i.e. distillation test) has been used as the daily detection method for the distillate amount of crude benzene before 180°C. Crude benzene distillation test is the most frequent test item in the production and processing of crude benzene. Although the accuracy is high, there are problems with large sampling volume, long analysis time (60 minutes), and the gasification process during sample analysis seriously pollutes the working environment and damages analysts. health and other issues. Especially when a large number of samples need to be analyzed in a short time, the crude benzene distillation test cannot meet the requirements. Contents of the invention [0003] The object of the present invention is to provide a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
Inventor 于健冯晓春冯跃平杜文金朱铁民郭强
Owner 新疆八一钢铁股份有限公司炼钢厂
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