Huazheng HZNQ-1101 Pour Point Apparatus ASTM D97 Oil Pour Point Tester

1. Name: Pour Point

2. Method summary: After the sample is cooled, check the fluidity of the sample every 3°C, and record the lowest temperature at which the sample can flow as the pour point.

3. Operation method

①Pour the sample into the dry and clean test tube to the ring mark, fix the thermometer in the center of the test tube with a stopper, make the bottom of the thermometer bubble 8 mm～10 mm from the bottom of the test tube, and then inject 1 mL～ into the bottom of the sleeve. 2 mL of absolute ethanol.

Then put the test tube into the sleeve to form the test tube assembly.

②Immerse this test tube assembly in the prepared cooling bath. From the first observation of the fluidity of the sample, the fluidity of the sample should be observed every time the temperature drops by 3°C, paying special attention not to disturb the lumps in the sample. The thermometer should not be moved after the sample is cooled enough to form paraffin crystals. When the temperature is low, the condensed water mist will hinder the observation. You can wipe the test tube with a cleaning cloth moistened with a wiper close to the temperature of the cold bath to remove the outer surface Water mist.

③When the test tube is tilted and the sample does not flow, immediately place the test tube in a horizontal position for 5 seconds (measured with a timer), and carefully observe the surface of the sample. If the sample shows any movement, immediately put the test tube back into the bath Or in the casing, when the temperature is lowered by 3°C, re-observe the fluidity of the sample.

④ Operate in this way until the test tube is placed in a horizontal position for 5 seconds and the sample in the test tube does not move. Record the thermometer readings observed at this time, and add 3°C to the recorded result as the pour point or lower Pour point.

1. Name: solidification point

2. Summary of the method: Put the sample in a prescribed test tube and cool it to the expected temperature. Tilt the test tube to 45° from the horizontal and let it stand for 1 minute. Observe whether the liquid level moves. Use the highest temperature when the liquid level does not move. As the freezing point of the sample, it is expressed in °C.

3. Operation method

①Pour the sample into the dry and clean test tube to the ring mark, and fix the thermometer in the center of the test tube with a stopper, so that the bottom of the thermometer bubble is 8 mm to 10 mm from the bottom of the test tube. Then inject 1 mL to 2 mL of absolute ethanol into the bottom of the sleeve.

Then put the test tube into the sleeve to form the test tube assembly.

② Immerse the test tube assembly in the prepared cooling bath. The temperature of the cooling bath should be 7 ℃ ~ 8 ℃ lower than the expected freezing point of the sample.

③When the temperature of the sample cools to the expected freezing point, tilt the sleeve and test tube assembly immersed in the cooling bath to 45° from the horizontal and keep it for 1 minute. At this time, the sample is required to be still immersed in it. Inside the coolant.

④Then carefully remove the test tube assembly from the cooling bath, quickly wipe the outer wall of the sleeve with absolute ethanol, place it vertically, and observe through the sleeve whether the liquid level in the test tube shows signs of movement, until it is determined that a certain test temperature can make the sample When the liquid surface stops moving and rises by 2 ℃ and the sample liquid surface can move again, the temperature at which the sample liquid surface does not move is taken as the freezing point of the sample.