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
CN111606830AInactive Publication Date: 2020-09-01XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
Publication Date
2020-09-01
Estimated Expiration
Not applicable · inactive patent

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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.
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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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