Preparation method of low-base-number and high-molecular-weight calcium alkyl benzene sulfonate antirust agent

A technology of calcium alkyl benzene sulfonate and alkyl benzene sulfonic acid is applied in the preparation of calcium sulfonate rust inhibitor, the preparation field of low base value, high molecular weight calcium alkyl benzene sulfonate rust inhibitor, and can solve the problem of preventing Poor rust performance, serious environmental pollution, small molecular weight and other problems, to achieve the effect of ensuring rust resistance and good universality

Inactive Publication Date: 2020-09-01
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing sulfonate antirust agent has a high base value, and it is easy to interact with some acidic components in the lubricating oil, resulting in gelation, precipitation and other phenomena; this makes the product less universal, thus affecting the downstream in the lubricating oil. scope of use;
[0005] The products of existing sulfonate antirust agents have small molecular weight and poor antirust performance;
[0006] The product universality of existing sulfonate antirust agent is poor, thus affecting the scope of downstream use in lubricating oil;
[0007] Barium sulfonate contains heavy metals, so it is highly toxic and causes serious environmental pollution;
[0008] The raw material dinonylnaphthalenesulfonic acid of calcium dinonylnaphthalenesulfonate has a higher cost, resulting in poor economical use.

Method used

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  • Preparation method of low-base-number and high-molecular-weight calcium alkyl benzene sulfonate antirust agent
  • Preparation method of low-base-number and high-molecular-weight calcium alkyl benzene sulfonate antirust agent

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preparation example Construction

[0037] Such as figure 1 Shown, the present invention provides a kind of preparation method of low alkali value, large molecular weight alkylbenzene sulfonate calcium antirust agent, it adopts high molecular weight alkylbenzene sulfonic acid to prepare ultra-low alkali value calcium alkylbenzene sulfonate, prepares The calcium alkylbenzene sulfonate antirust agent has excellent antirust performance, and its alkali value is very low, does not contain heavy metals, has little environmental pollution, and has significant advantages in product economy and universality; including:

[0038] Step 1, adding solvent, base oil, alcohol A, calcium oxide and water into the reaction vessel, and stirring evenly;

[0039] Among them, specifically include:

[0040] Under the condition of protective gas, put the solvent, base oil, alcohol A, calcium oxide and water into the reaction kettle, raise the temperature to 50-60°C, and stir evenly;

[0041] or,

[0042] Under the condition of protec...

example 1

[0061]Take 300kg of solvent, 140kg of base oil, and 50kg of alcohol A into a 1000L reactor, stir for 20min to mix evenly. Finally, 8.5kg of calcium oxide and 10kg of water were added and stirred for 30 minutes. Take 150kg of alkylbenzene sulfonic acid whose carbon chain length is C22-C24, and add it dropwise at a uniform speed within 90-120 minutes, and the temperature is raised to 50-60°C. Then the temperature was raised to 70-75°C, neutralized for 2 hours, and the pH value of the neutralized reaction solution was recorded. After the first stage of neutralization, alcohol and water are removed by flash evaporation, and the temperature is lowered to 50-60°C. Add 50kg of alcohol B, 15kg of water, and 80kg of solvent, raise the temperature to 90-95°C, neutralize for 2 hours, and record the pH value of the neutralization reaction solution. After the second stage of neutralization, alcohol and water are removed by flash evaporation. After the dealcoholization is completed, the ...

example 2

[0063] Take 300kg of solvent, 140kg of base oil, and 50kg of alcohol A into a 1000L reactor, stir for 20min to mix evenly. Finally, 10kg of calcium oxide and 10kg of water were added and stirred for 30 minutes. Take 150kg of alkylbenzene sulfonic acid whose carbon chain length is C22-C24, and add it dropwise at a uniform speed within 90-120 minutes, and the temperature is raised to 50-60°C. Then the temperature was raised to 70-75°C, neutralized for 2 hours, and the pH value of the neutralized reaction solution was recorded. After the first stage of neutralization, alcohol and water are removed by flash evaporation, and the temperature is lowered to 50-60°C. Add 50kg of alcohol B, 15kg of water, and 80kg of solvent, raise the temperature to 90-95°C, neutralize for 2 hours, and record the pH value of the neutralization reaction solution. After the second stage of neutralization, alcohol and water are removed by flash evaporation. After the dealcoholization is completed, the ...

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Abstract

The invention discloses a preparation method of a low-base-number and high-molecular-weight calcium alkyl benzene sulfonate antirust agent, which comprises the following steps: adding a solvent, baseoil, alcohol A, calcium oxide and water into a reaction vessel, and uniformly stirring; dropwise adding alkyl benzene sulfonic acid into the reaction vessel, and after dropwise adding is completed, heating to 70-75 DEG C for a primary neutralization reaction; after the primary neutralization reaction is finished, performing flash evaporation to remove alcohol A and water, and reducing the temperature to 50-60 DEG C; adding alcohol B, water and a solvent into the reaction vessel, heating to 90-95 DEG C, and carrying out a secondary neutralization reaction; and after the secondary neutralizationreaction is finished, carrying out flash evaporation to remove alcohol B and water, carrying out settling separation, centrifuging the upper reaction solution, and carrying out reduced pressure distillation to obtain the calcium alkyl benzene sulfonate product. The molecular weight of the calcium alkyl benzene sulfonate antirust agent is relatively large, so that the antirust property of the calcium alkyl benzene sulfonate antirust agent in lubricating oil is ensured; and due to the ultralow base number of the product, the product is not easy to interact with acidic substances in the system,so that the universality of the product is better.

Description

technical field [0001] The invention belongs to the technical field of antirust agents, and relates to a preparation method of a calcium sulfonate antirust agent, in particular to a preparation method of a low alkali value, high molecular weight alkylbenzene sulfonate calcium antirust agent. Background technique [0002] Sulfonate antirust agent is an important part of various lubricating oils, which is formed by the reaction of sulfonic acid and different alkalis under certain conditions. [0003] At present, the main sulfonate rust inhibitors are barium sulfonate, sodium sulfonate, and calcium dinonylnaphthalene sulfonate; among them, [0004] The existing sulfonate antirust agent has a high base value, and it is easy to interact with some acidic components in the lubricating oil, resulting in gelation, precipitation and other phenomena; this makes the product less universal, thus affecting the downstream in the lubricating oil. scope of use; [0005] The products of exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/31C07C303/32C07C303/44C10M135/10C10M163/00C10N10/04C10N30/12C10N20/04
CPCC07C309/31C07C303/32C07C303/44C10M135/10C10M163/00C10M2219/044C10M2203/10C10M2203/1006
Inventor 张超卜卫元范金凤李学文
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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