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Method for determining moisture content in petroleum product through distillation method

A technology of petroleum products and distillation, which is applied in the analysis of petroleum products and the research field of petroleum products, to achieve the effect of shortening the experiment time, improving the experiment efficiency and controlling the distillation speed

Inactive Publication Date: 2019-03-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an optimized distillation method for measuring the moisture content in petroleum products, and to use the relationship between sample size and viscosity to determine the appropriate sample size and avoid the viscosity of the sample itself. Inaccurate test results and low precision caused by factors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Take an appropriate amount of 220# gear oil with a calibrated moisture content of 0.80%, and ultrasonically oscillate the sample at 50W, 40KHz for 3 minutes to mix the sample evenly;

[0039] (2) Filter the sample after ultrasonication with a medium-speed quantitative filter paper with a diameter of 120 mm to remove impurities;

[0040] (3) Pipette gun to pipette 1mL of the filtered sample and drop it into the automatic viscosity measuring instrument. After 55.8s, the instrument shows that the sample kinematic viscosity (40°C) is 223.6mm 2 / s;

[0041] (4) Weight loss method Weigh 25g of the sample and pour it into a 250mL retort, measure 100mL of petroleum ether (90°C-120°C) into the retort with a graduated cylinder, mix for 5min to fully dissolve the sample;

[0042] (5) Place the distillation bottle on the heater, connect the distillation device and the moisture receiver, equip the top of the condensation tube with a dryer, adjust the temperature of the heater t...

Embodiment 2

[0060] (1) Take an appropriate amount of 320# gear oil with a calibrated moisture content of 0.40%, and ultrasonically oscillate the sample at 70W, 40KHz for 4 minutes to mix the sample evenly;

[0061] (2) Filter the sample after ultrasonication with a medium-speed quantitative filter paper with a diameter of 120 mm to remove impurities;

[0062] (3) Pipette gun to pipette 2mL of the filtered sample and drop it into the automatic viscosity measuring instrument. After 80.4s, the instrument shows that the sample kinematic viscosity (40°C) is 321.5mm 2 / s;

[0063] (4) Weight loss method Weigh 25g of the sample and pour it into a 250mL retort, measure 100mL of petroleum ether (90°C-120°C) with a graduated cylinder and pour it into the retort, mix for 7 minutes to fully dissolve the sample;

[0064] (5) Place the distillation bottle on the heater, connect the distillation device and the moisture receiver, equip the top of the condensation tube with a dryer, adjust the temperature ...

Embodiment 3

[0080] (1) Take an appropriate amount of 46# hydraulic oil with a calibrated moisture content of 0.50%, and ultrasonically vibrate the sample for 5 minutes under ultrasonic wave 60W, 40KHz, so that the sample is evenly mixed;

[0081] (2) Filter the sample after ultrasonication with a medium-speed quantitative filter paper with a diameter of 120 mm to remove impurities;

[0082] (3) Pipette gun to pipette 3mL of the filtered sample and drop it into the automatic viscosity measuring instrument. After 46.2s, the instrument shows that the sample kinematic viscosity (40°C) is 46.2mm 2 / s;

[0083] (4) Weight loss method Weigh 100g of the sample and pour it into a 250mL retort, measure 100mL of petroleum ether (90°C-120°C) into the retort with a graduated cylinder, and mix for 8 minutes to fully dissolve the sample;

[0084] (5) Place the distillation bottle on the heater, connect the distillation device and the moisture receiver, equip the top of the condensation tube with a drye...

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Abstract

The invention relates to the field of researches of petroleum products, in particular relates to the technical field of analysis of the petroleum products and more specifically relates to a method fordetermining the moisture content in the petroleum product through a distillation method. The viscosity of a sample is preferentially determined and the proper quality is selected according to the viscosity size to ensure that the sample is sufficiently dissolved through a solvent, so that a phenomenon that the sample is adhered to a bottle wall and is difficult to uniformly mix with the solvent is avoided; meanwhile, pre-treatment steps including homogenization, filtering operation and the like are carried out, an impurity deposition phenomenon can be avoided and the sample has better representativeness; and furthermore, the distillation speed is effectively controlled, the experiment duration is shortened and the experiment efficiency is improved. Finally, a drying device is additionallyarranged on a condensation pipe of an original device and the moisture in the atmosphere is effectively prevented from entering; and the accuracy of a detection result is improved and influences, caused by the environment, on a testing result are avoided.

Description

technical field [0001] The invention relates to the research field of petroleum products, in particular to the technical field of analysis of petroleum products, more specifically to a method for determining the moisture content in petroleum products by distillation. Background technique [0002] Moisture is one of the main factors leading to the pollution of lubricating oil products. When the moisture in lubricating oil exceeds the standard, it will cause various hazards to mechanical equipment. Therefore, the moisture content in lubricating oil becomes the key factor to determine the safe and stable operation of mechanical equipment; moisture can cause electrochemical corrosion of steel parts, cause mechanical equipment parts to rust, and shorten the service life of machinery; in addition, the generated metal rust ions will interact with Water and air work together to catalyze and promote the oxidation of lubricating oil, and accelerate the corrosion and wear of mechanical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04G01N1/34
CPCG01N1/34G01N5/045
Inventor 沈彬夏泽华赵允龙贾敏
Owner SOUTHEAST UNIV
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