Preparation method of composite calcium sulfonate antirust agent

A technology of composite calcium sulfonate and rust inhibitor, applied in lubricating compositions, petroleum industry and other directions, can solve the problems of poor use economy and high cost of dinonylnaphthalene sulfonic acid, achieve low production cost, high product yield, good compatibility
CN113249162APending Publication Date: 2021-08-13XINXIANG 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
2021-08-13

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Abstract

The invention discloses a preparation method of a composite calcium sulfonate antirust agent, which comprises the following steps: adding an organic solvent, base oil, alcohol, calcium oxide and water into a reaction kettle, and heating to 55-60 DEG C; then, adding alkyl benzene sulfonic acid into the reaction kettle in a constant-speed dropwise adding manner, and carrying out primary neutralization reaction; continuously dropwise adding one or more of carboxylic acid, anhydride, salicylic acid and alkylphenol into the reaction kettle at a constant speed, adding water and calcium oxide, heating to 75-80 DEG C, and carrying out secondary neutralization reaction; after the neutralization reaction is finished, removing alcohol and water through flash evaporation, and cooling materials to the room temperature for settling separation; and centrifuging the organic phase on the upper layer, and desolventizing by reduced pressure evaporation to obtain the composite calcium sulfonate antirust agent. The prepared composite calcium sulfonate antirust agent has high sulfonic acid proportion, and the antirust property of the composite calcium sulfonate antirust agent in lubricating oil is guaranteed; the product is compounded, so that the compatibility of the product in the lubricating oil is better, the product is not easy to interact with other components in the system, and the universality of the product is better.
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Description

technical field

[0001] The invention relates to the technical field of antirust agents, in particular to a preparation method of a composite calcium sulfonate antirust agent. Background technique

[0002] Sulfonate rust inhibitor is an important part of various lubricating oils, which is produced by the neutralization reaction of sulfonic acid and alkali under certain conditions.

[0003] Currently commonly used sulfonate rust inhibitors mainly include barium sulfonate, sodium sulfonate and calcium dinonyl naphthalene sulfonate:

[0004] Barium sulfonate contains heavy metals, so it is highly toxic and causes serious environmental pollution;

[0005] Sodium sulfonate has strong hydrophilicity and good emulsifying ability, so it is seldom used alone as an anti-rust additive and needs to be used in combination with other corrosion inhibitors;

[0006] The cost of dinonylnaphthalenesulfonic acid required for the preparation of calcium dinonylnaphthalenesulfonate is relatively...

Claims

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