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Method of evaluating base number retention of clearing agents

A detergent and retention technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of evaluation of base value retention without detergent, etc., and achieve the effect of easy implementation of evaluation means, simple operation, and simplified design process

Inactive Publication Date: 2020-01-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a kind of method for evaluating the alkali number retention of cleaning agent, to solve the defect of the direct method that does not have the direct method that the alkali number retention of cleaning agent is evaluated in the prior art

Method used

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  • Method of evaluating base number retention of clearing agents
  • Method of evaluating base number retention of clearing agents
  • Method of evaluating base number retention of clearing agents

Examples

Experimental program
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Embodiment 1

[0064] The present embodiment provides a method for evaluating the alkalinity retention of detergent, comprising the following steps:

[0065] Take 10g of alkylsulfonate detergent E611 with a base value of 300mg KOH / g, add it to 90g of HVI400SN base oil, stir at 60°C for 30 minutes, stop stirring after fully mixing, and prepare a mixed oil with TBN of 30mg KOH / g Taste.

[0066] Place a 250mL single-necked flask in a water bath with a magnetic stirrer and heating function, add 100g of the above-mentioned mixed oil into the flask, place a magnetic stirrer, set the temperature of the water bath to 60°C, and start stirring .

[0067] Mix sulfuric acid (33%m / m) and glacial acetic acid (pure) at a ratio of 1:3 to make a mixed acid. And take 4mL of the above mixed acid and add it to the dropping funnel, then add it dropwise to the mixed oil, and complete the dropwise addition within 30 minutes.

[0068] Keep stirring for 120 minutes, and it can be observed that there is continuous...

Embodiment 2

[0071] The present embodiment provides a method for evaluating the alkalinity retention of detergent, comprising the following steps:

[0072] Take 10g of alkylsulfonate detergent T106A with a base value of 300mg KOH / g, add it to 90g of HVI400SN base oil, stir at 60°C for 30 minutes, stop stirring after fully mixing, and prepare a mixed oil product with TBN 30mg KOH / g .

[0073] Place a 250mL single-necked flask in a water bath with a magnetic stirrer and heating function, add 100g of the above-mentioned mixed oil into the flask, place a magnetic stirrer, set the temperature of the water bath to 60°C, and start stirring .

[0074] Mix sulfuric acid (25% m / m) and glacial acetic acid (pure) at a ratio of 1:1 to make a mixed acid. And take 4mL of the above mixed acid and add it to the dropping funnel, then add it dropwise to the mixed oil, and complete the dropwise addition within 30 minutes.

[0075] Keep stirring for 120 minutes, and it can be observed that there is continuo...

Embodiment 3

[0078] The present embodiment provides a method for evaluating the alkalinity retention of detergent, comprising the following steps:

[0079] Take 7.5g of alkyl sulfonate detergent T107 with a base value of 400mg KOH / g, add it to 92.5g of HVI400SN base oil, stir at 60°C for 30 minutes, stop stirring after fully mixing, and prepare a mixture of TBN30mg KOH / g Oil.

[0080] Place a 250mL single-necked flask in a water bath with a magnetic stirrer and heating function, add 100g of the above-mentioned mixed oil into the flask, place a magnetic stirrer, set the temperature of the water bath to 65°C, and start stirring .

[0081] Mix sulfuric acid (33%m / m) and glacial acetic acid (pure) at a ratio of 1:3 to make a mixed acid. And take 4mL of the above mixed acid and add it to the dropping funnel, then add it dropwise to the mixed oil, and complete the dropwise addition within 30 minutes.

[0082] Keep stirring for 120 minutes, and it can be observed that there is continuous gas p...

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Abstract

The invention provides a method of evaluating base number retention of clearing agents. The method comprises the steps that according to base numbers of the clearing agents, a certain quantity of theclearing agents are added into base oil HVI400SN, and an oil product with a TBN (Total Base Number) being 15-50mg KOH / g is made; sulfuric acid (33%m / m) and glacial acetic acid (pure) are made into mixed acid for use according to the ratio of 1:3; 2-8mL of the mixed acid is taken and added into a 80-100g lubricating oil sample, a reaction is stopped after stirring is performed for 100-120 minutes under the temperature of 60-65 DEG C, and detection of base numbers and acid numbers is performed; and through determination of the base numbers and the acid numbers, base number retention differencesamong the clearing agents can be determined. The method is simple and easy to implement, and detection conclusions can serve as bases for lubricating oil development personnel to select the clearing agents and meanwhile can serve as bases for clearing agent production personnel to produce the clearing agents with excellent properties.

Description

technical field [0001] The invention relates to the field of marine lubricating oil detergents, and particularly discloses a method for evaluating the alkali value retention of marine detergents. Background technique [0002] Detergent is the most important type of additive in marine lubricating oil. It is composed of surfactants and inorganic salts wrapped inside. Its main function is to neutralize the acidic substances converted from sulfur contained in fuel. . The speed of neutralizing acid substances determines the anti-acid performance of the detergent used in internal combustion engine oil, and can be used as the main basis for judging internal combustion engine oil products. [0003] Detergents are divided into sulfonate, sulfurized alkylphenate and salicylate detergents according to their different types of surfactants. Among them, sulfonate detergents are the most commonly used and the largest amount of detergents, sulfurized alkyl Phenyl salt detergents are deter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/00
Inventor 冯涛翟月奎袁学军王海峰
Owner PETROCHINA CO LTD
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