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Fast measuring process of saponfication value of emulsion

A rapid determination and emulsion technology, applied in chemical method analysis, measuring devices, special data processing applications, etc., can solve the problems of consuming large chemical reagents and organic solvents, affecting the efficiency of saponification value determination, and taking a long time. Achieve the effects of simple operation, accurate and reliable measurement results, and shortened time

Inactive Publication Date: 2009-07-29
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above methods can only be measured after extracting or leaching the oil in the emulsion by various means. The process of extracting or leaching the oil is complicated and cumbersome, and it needs to consume a large amount of chemical reagents and organic solvents, and it takes a long time. Longer, only two steps of oil-water separation and oil extraction will take at least two hours, which seriously affects the efficiency of saponification value determination

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment one: a kind of assay method of saponification value of emulsified liquid of cold rolling mill, its specific operation steps are as follows:

[0018] 1. Preparation of reagents and instruments

[0019] Hydrochloric acid (analytical pure); Butanone (analytical pure); Ethanol (analytical pure); Potassium hydroxide (analytical pure); requirements); microwave reactor; automatic potentiometric titrator.

[0020] 2. Sample processing

[0021] Accurately weigh 10 g of the emulsion into a microwave sample tank, add 10 ml of potassium hydroxide / ethanol mixed solution (wherein the concentration of potassium hydroxide is prepared to be the same as the concentration of hydrochloric acid used) and 10 ml of methyl ethyl ketone as the reaction medium, and use The set working program of the instrument is used for microwave saponification reaction, specifically: the microwave reaction program is 550W (4 minutes) - 0W (1 minute) - 550W (2 minutes).

[0022] 3. Sample determi...

Embodiment 2

[0028] Embodiment two: a kind of assay method of emulsion saponification value of five-stand continuous rolling mill, its specific operation steps are as follows:

[0029] 1. Preparation of reagents and instruments

[0030] Hydrochloric acid (analytical pure); Butanone (analytical pure); Ethanol (analytical pure); Potassium hydroxide (analytical pure); requirements); microwave reactor; automatic potentiometric titrator.

[0031] 2. Sample processing

[0032] Accurately weigh 10g of the emulsion into the microwave sample tank, add 8ml of potassium hydroxide / ethanol mixed solution and 8ml of butanone as the reaction medium, and carry out the microwave saponification reaction in the microwave reactor with the set instrument working procedure. The specific operation is : The microwave reaction program is 550W (5 minutes) - 0W (2 minutes) - 550W (2 minutes).

[0033] 3. Sample determination

[0034] 1. Determination of emulsion concentration

[0035] Pipette about 10 g of the ...

Embodiment 3

[0039] Embodiment three: a kind of assay method of saponification value of emulsified liquid of cold rolling mill, its specific operation steps are as follows:

[0040] 1. Preparation of reagents and instruments

[0041]Hydrochloric acid (analytical pure); Butanone (analytical pure); Ethanol (analytical pure); Potassium hydroxide (analytical pure); requirements); microwave reactor; automatic potentiometric titrator.

[0042] 2. Sample processing

[0043] Accurately weigh 10 g of the emulsion into a microwave sample tank, add 12 ml of potassium hydroxide / ethanol mixed solution and 12 ml of methyl ethyl ketone as the reaction medium, and carry out the microwave saponification reaction in the microwave reactor with the set instrument working procedures. Specifically: the microwave reaction program is 550W (3 minutes)-0W (1 minute)-550W (3 minutes).

[0044] 3. Sample determination

[0045] 1. Determination of emulsion concentration

[0046] Pipette about 5 g of the emulsion,...

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Abstract

The process of measuring saponification value of emulsion fast, simply and accurately includes: the first microwave saponification reaction of emulsion with excessive potassium hydroxide in ethanol and butanone medium, the subsequent automatic electrometric titration with non-aqueous acid and alkali electrode as indication electrode, measuring the oil content in the emulsified liquid and calculating. Compared with available technology, the present invention has the advantages of less steps, lower consumption of organic solvent, shortened analysis period, and accurate and reliable measurement result.

Description

technical field [0001] The invention relates to a method for measuring the saponification value of an emulsion, more particularly to a rapid determination method for directly measuring the saponification value of the emulsion with an automatic potentiometric titrator without extracting or extracting the emulsion. Background technique [0002] The emulsion has a good lubricating function for cold rolling, which can reduce the rolling pressure, reduce energy consumption, cool the roll and strip, prevent roll cracking and roll winding, and the emulsion also has good cleaning properties to ensure The cleanliness of the board surface and the anti-rust ability of a certain process play an important role. The saponification value of the emulsion is an important indicator of the quality of the rolling oil. Since the saponification value of the emulsion will decrease after a period of use and affect the quality of the emulsion, it is often necessary to analyze the saponification val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N31/00G06F19/00
Inventor 范纯
Owner BAOSHAN IRON & STEEL CO LTD
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