Methanol is a colorless, transparent, flammable, volatile toxic liquid with a slight alcohol odor.
Molecular weight 32.04, relative density 0.792(20/4℃), melting point -97.8℃, boiling point 64.5℃, flash point 12.22℃, spontaneous combustion point 463.89℃ :
Methanol (Methanol, CH 3OH) is the simplest single saturated alcohol with A CAS number of 67-56-1 or 170082-17-4, its molecular weight is 32.04, and its boiling point is 64.7℃.
Because be discovered for the first time in dry still wood, reason says again "wood alcohol" or "wood essence".
A colorless, alcohol-scented, volatile liquid.
The lowest dose of oral poisoning in humans is about 100mg/kg body weight, and oral ingestion of 0.3 to 1g/kg can lead to death.
For the manufacture of formaldehyde and pesticides, and used as organic extraction agent and alcohol denaturant, etc.
The finished product is usually made by reacting carbon monoxide with hydrogen gas.
For the automatic measurement of methanol flash point, the automatic low-temperature close-mouth flash point meter, namely SH105C low-temperature close-mouth flash point meter, can be used.
SH105C low-temperature closing flash point instrument is designed and manufactured in accordance with the requirements stipulated in GB/T261-2008 standard of the People's Republic of China.
The instrument is heated according to the standard method, automatic lifting, automatic ventilation, automatic ignition, automatic display, automatic locking flash point value, automatic printing results.
After the completion of the test can be automatically cooled, the work process to achieve full automation.
It has the advantages of accurate measurement, good repeatability, stable performance and simple operation.
Widely used in electric power, petroleum, chemical industry, commodity inspection, scientific research and other departments.
Comply with ISO - 2719,GB261 standard.
Apparatus needed for experiment
1.SH105C automatic low-temperature closing flash point instrument was developed and produced by Shandong Shengtai Instrument Co., LTD.
2. Low-temperature closing flash point meter is equipped with low-temperature circulation device.
3. Special cup for closed-mouth flash point
Experimental steps:
Preparation work
1. After unpacking the instrument, please count the accessories according to the packing list. If there is any damage, please contact our company.
2. The instrument should be handled vertically. The tilt Angle should not exceed 30 degrees along the height of the instrument.
3. Connect the power supply of the instrument to the socket with a capacity of 220V/10A or above, and pay attention to having a good grounding wire.
Ii. Experiment process
1. After the power is switched on, the measuring arm of the instrument will lift automatically to display the experimental interface.
Click "Start" and the test arm drops to start the test.
Click "Abort" to stop the test and the test arm rises.
The "Test Conditions" section shows the test setting conditions, including expected flash points, printer switch Settings, test criteria, etc.
The "Test Information" section shows the progress of the test.
In the test interface, click "self-check", "Set", "condition", "record" and other buttons to enter the corresponding functional interface.
2. Self-check interface
This interface can perform self-check operation on all parts of the instrument.
Click "Test arm", and the test arm assembly will rise;
Click again, and the test arm component drops.
Click "igniter" to light the highlight igniter;
Click again to extinguish the ignition.
Click "Stir" to start stirring;
Click again and close the stirring.
Click "Open the lid", start the lid skateboard to run, and automatically return to position.
Click "Printer" to start printer printing self-test. The printer will print simulated test results (not real measurement results) to verify whether the printer is working properly.
During the self-inspection of each component, the corresponding operation information will be displayed below it.
3. Interface setting
From this interface, expected flash point value and atmospheric pressure value can be set: Click "Expected Flash point" or "Change" after "atmospheric pressure" to enter the expected flash point or atmospheric pressure setting interface:
Expected flash point setting