Analysis of toluene, xylene, ethylbenzene in crude benzene using gas chromatography

Crude benzene contains various organic chemical raw materials, which can be used as power benzene after hydrogenation treatment, and can also be distilled to separate important basic organic chemical raw materials such as benzene, toluene, and xylene.

Analysis of toluene, xylene, ethylbenzene in crude benzene using gas chromatographyAnalysis conditions:

Gas chromatograph with hydrogen flame detector, capillary device, SE-30 30m * 0.53mm * 0.5um capillary column

Gasification chamber temperature: 250 ℃

Column temperature: Program heating, initial temperature 85 ℃, hold for 10 minutes, then increase to 145 ℃ at a rate of 5 ℃/min, hold for 5 minutes

Detector temperature: 200 ℃

Carrier gas: nitrogen, column flow rate 210ml/min

Split ratio: 150:1

Instrument features:

1. The instrument adopts Chinese LCD screen display technology, which is intuitive and easy to operate.

2. Keyboard digit zeroing technology facilitates users in setting various operational data.

3. Data power-off protection function, the parameters set by the instrument can be saved for a long time after power failure, achieving one click start and stop. 4. Microcomputer controlled FID detector with automatic ignition and stopwatch timing function.

5. Equipped with over temperature protection device. When the temperature exceeds the set limit, the instrument will stop heating and report a fault on the display.

6. The temperature control circuit using a microprocessor achieves a temperature accuracy of 0.1 degrees for the controlled objects in each heating zone.
7. The intelligent dual back door technology ensures good temperature control accuracy of the instrument column box, and can quickly cool down by 8 and 8 stages of programmed heating, suitable for the analysis of complex samples with wide boiling points.

9. Unit based overall structural design, easy to install and maintain.
10. The instrument design is reasonable and flexible, capable of installing three types of detectors simultaneously, and has independent circuit systems and signal output terminals.

11. Flexible packed column and capillary column system, capable of connecting capillary columns of different diameters.

12. It has gas cutoff protection and Chinese prompt function, which can protect TCD tungsten wire and chromatographic column from damage.

13. Self diagnostic function with "0 ℃" protection function. When the temperature display of any channel is always "0 ℃", the heating will automatically stop to prevent the heating element from being damaged due to the constant heating of the chamber And there are Chinese prompts for the cause of the fault and alarm prompts.

14. The instrument parameters are displayed intuitively through a Chinese monitor, and through a user-friendly software interface, it is convenient for users to set parameters including temperature, range rise, detector, bridge current, etc; Intuitively operate the switch bridge flow, turn on and off temperature control, turn on and off the lift and various time events functions.

15. The instrument computer is connected to the Internet and can be connected to the instrument through a remote computer to realize remote data collection and management. Improved the degree of freedom of the device and promoted its effective application in the laboratory.

16. The main control circuit adopts a functional microprocessor and a large capacity memory, making data storage more reliable. The integrated design of a circuit board that combines measurement, control, and power supply improves the anti-interference and reliability of the instrument.

Main technical indicators:
1. Temperature control indicators:
Column box: accuracy ± 0.1 ℃ (measured at 200 ℃) at room temperature between 5 ℃ and 420 ℃.
Sample injector: Accuracy ± 0.1 ℃ at room temperature between 5 ℃ and 420 ℃ (measured at 200 ℃).
Detector: Accuracy ± 0.1 ℃ at room temperature between 5 ℃ and 420 ℃ (measured at 200 ℃).
Zui Duoliu Temperature Control: Suitable for multiple temperature control requirements such as installing conversion furnaces.
2. Column temperature box parameters:
Temperature control accuracy: accuracy ± 0.1 ℃ at room temperature between 5 ℃ and 420 ℃.
Column temperature box volume: 280mm × 280mm × 250mm.
Program heating order: eight orders.
Program heating rate: 1 ℃ -50 ℃.
Constant temperature holding time for each stage: 0-300min (1min increments).
Automatic rear door design ensures rapid cooling.
A high-power, low-noise rotating fan ensures temperature uniformity.
3. Stable dual air system:
The carrier gas flow rate adopts a dual stability design of first stabilizing and then stabilizing the flow.
Accurate scale type pneumatic control valve components with high reproducibility and stability.
4. Multiple injection methods are available:
Fill the column head for injection.
Filling column gasification injection.
Capillary diversion/non diversion injection: back pressure valve control technology, linear diversion.
Six way valve gas injection.
IIIAnalysis of toluene, xylene, ethylbenzene in crude benzene using gas chromatographyHigh sensitivity detector parameters ensure the accuracy of data