An instrument and method for quantitatively analyzing trace oxides in petroleum hydrocarbons
A quantitative analysis and oxide technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve the problems of large dead volume and difficult establishment of the valve switching system, and achieve less sample consumption, good accuracy and repeatability, The effect of accurate and reliable data
Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0005] In order to solve the problems in the existing chromatographic analysis technology of using traditional valve switching technology when analyzing petroleum hydrocarbons, the method is difficult to establish, and the dead volume of the valve switching system is relatively large, the present invention provides a method for quantitatively analyzing trace oxides in petroleum hydrocarbons. instruments and methods
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Embodiment 1～5
[0067] Examples 1-4 are liquid samples C4-C12, and Example 5 is gas samples C1-C5;
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Abstract
The invention discloses an instrument for quantitatively analyzing trace oxide in petroleum hydrocarbon and a method for quantitatively analyzing the trace oxide in the petroleum hydrocarbon. The instrument comprises a sample feeding hole, two hydrogen flame ionization detectors, a damping column, a polar chromatographic column, a non-polar chromatographic column, three three-way valves, an electromagnetic switching valve and a pressure controller, wherein the sample feeding hole is connected with the non-polar chromatographic column and then is connected with the three-way valve C; the hydrogen flame ionization detector A is connected with the damping column and then is connected with the three-way valve A; the hydrogen flame ionization detector B is connected with the polar chromatographic column and then is connected with the three-way valve B; the three-way valve C is connected with the three-way valve A and the three-way valve B respectively; the three-way valve A and the three-way valve B are connected with the electromagnetic switching valve respectively; and the electromagnetic switching valve is connected with the pressure controller. According to the instrument, a novel flow path switching manner without a dead volume is adopted, a cutting range is narrow, and the detection problem of the content of the trace oxide in the petroleum hydrocarbon is solved very well; and the detection precision is high, the accurately is good, and the instrument and the method can be used for detecting the trace oxide in the petroleum hydrocarbon.
Description
technical field [0001] The invention relates to the field of trace analysis of petroleum hydrocarbons, and more particularly relates to an instrument and a method for quantitatively analyzing trace oxides in petroleum hydrocarbons. Background technique [0002] Petroleum hydrocarbons are extremely complex chemical mixtures, and the products after pyrolysis are the raw materials for the production of ethylene and propylene. Since the petroleum hydrocarbons used as cracking raw materials are extremely complex chemical mixtures, the trace oxygen-containing compounds in them are mainly Catalyst poisoning often occurs during the chemical processing of the products ethylene and butene. Domestic raw materials for ethylene production do not have requirements for oxygen-containing compounds. However, as my country's ethylene production technology level is in line with international standards, some ethylene manufacturers have also proposed corresponding product quality indicators. Gen...
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IPC IPC(8): G01N30/02
Inventor 南秀琴巴海鹏司宇辰薛丽敏张永刚张兆斌杜志国
Owner CHINA PETROLEUM & CHEM CORP