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Method for measuring oil content of dichloromethane

A technology of dichloromethane and oil content, which is applied in the field of dichloromethane oil content measurement experiment, can solve the problems of tester injury, large fluctuation of m2 value, influence of experimental results, etc., and achieves the improvement of safety and accuracy. Effect

Inactive Publication Date: 2020-02-07
JIANGSU HORIZON NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring by this method, because dichloromethane is volatile, the value of m2 fluctuates greatly, which has a certain impact on the experimental results, and dichloromethane is a toxic gas after volatilization. If it is accidentally inhaled, it will also cause certain harm to the test personnel.

Method used

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  • Method for measuring oil content of dichloromethane

Examples

Experimental program
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Effect test

Embodiment 1

[0017] see figure 1 , the present embodiment provides a method for measuring the oil content of dichloromethane. First, take a single-port jacketed reaction bottle, weigh its weight as m1, and have air inlets on the opposite side walls of the single-port jacketed reaction bottle. and the gas outlet, pour the dichloromethane sample into the single-port jacketed reaction bottle, and then continuously pass the cooling gas into the inlet for at least one minute, and the cooling gas flows out from the gas outlet, and then weigh the sample containing the dichloromethane The weight of the single-port jacketed reaction bottle m2, put the single-port jacketed reaction bottle containing the dichloromethane sample into a constant temperature blast drying oven and let it stand at a constant temperature of at least 40°C for at least 10 minutes. The mouth of the jacketed reaction bottle overflowed, and then the single-mouth jacketed reaction bottle containing the dichloromethane sample afte...

Embodiment 2

[0023] see figure 1 , the figure shows a method for measuring the oil content of dichloromethane provided by Embodiment 2 of the present invention. This embodiment further makes the following technical solutions as improvements on the basis of the above-mentioned embodiments: Put the single-mouth jacketed reaction bottle with dichloromethane sample in a constant temperature blast drying oven at a temperature of at least 40 ° C for at least 10 minutes, then put it in a glass desiccator to cool, and put it again after cooling. The temperature of at least 40°C was kept in a constant temperature blast drying oven for about 10 minutes, and the dichloromethane was removed more thoroughly by the second temperature rise, which further improved the accuracy of the experimental results.

Embodiment 3

[0025] see figure 1 , the figure shows a method for measuring the oil content of dichloromethane provided by Embodiment 3 of the present invention. On the basis of the above-mentioned embodiments, this embodiment further makes the following technical solutions as improvements: dichloromethane After the methane volatilizes, it leaves the single-mouth jacketed reaction bottle from the mouth of the single-mouth jacketed reaction bottle. In order to avoid the volatilization of liquids other than the dichloromethane sample, install absorbent paper at the mouth of the single-mouthed jacketed reaction bottle, and evenly open on the absorbent paper. There are through holes for the circulation of volatilized methylene chloride gas.

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Abstract

The invention provides a method for measuring the oil content of dichloromethane. The method comprises the following steps of taking a single-port jacketed reaction bottle, weighing the reaction bottle as m1, setting a gas inlet and a gas outlet in two opposite side walls of the single-port jacketed reaction bottle, pouring a dichloromethane sample into the single-port jacketed reaction bottle, continuously introducing cooling gas into the gas inlet for at least one minute, allowing the cooling gas to flow out from the gas outlet, weighing the weight m2 of the single-port jacketed reaction bottle filled with the dichloromethane sample, putting the single-port jacketed reaction bottle filled with the dichloromethane sample into a constant-temperature blast drying oven and standing for at least 10 minutes at the constant temperature of at least 40 DEG C, allowing dichloromethane gas to overflow from a bottle opening of the single-opening jacketed reaction bottle, then putting the single-opening jacketed reaction bottle filled with the dichloromethane sample after standing into a glass dryer for cooling, weighing after cooling is finished, recording the weight as m3, and calculating to obtain the oil content of (m3-m1) / (m2-m1) of dichloromethane. Compared with the prior art, the invention has the advantages that the accuracy of an experimental result is improved, experimenters areprevented from inhaling dichloromethane gas by mistake, and the safety is improved.

Description

technical field [0001] The invention relates to an experiment for measuring the oil content of dichloromethane, in particular to a method for measuring the oil content of dichloromethane. Background technique [0002] At this stage, when testing the oil content of dichloromethane, the thermogravimetric method is used. First, weigh the weight of the petri dish used in the experiment, and record the weight as m1. Then, pour the obtained dichloromethane into the petri dish and weigh it, and record the weight at this time. After that, quickly put the culture dish into a constant temperature blast drying oven at 75°C for 10 minutes, then put the culture dish into a glass desiccator to cool to room temperature, take out the culture dish and weigh it, record the weight at this time as m3, Then the oil content of dichloromethane is (m3-m1) / (m2-m1). When measuring by this method, because dichloromethane is volatile, the value of m2 fluctuates greatly, which has a certain impact on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 曹人及金骋陈朝晖赵蒙晰
Owner JIANGSU HORIZON NEW ENERGY TECH CO LTD