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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

Pending Publication Date: 2021-08-13
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The cost of dinonylnaphthalenesulfonic acid required for the preparation of calcium dinonylnaphthalenesulfonate is relatively high, resulting in poor economical use;

Method used

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  • Preparation method of composite calcium sulfonate antirust agent
  • Preparation method of composite calcium sulfonate antirust agent
  • Preparation method of composite calcium sulfonate antirust agent

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preparation example Construction

[0035] Such as figure 1 Shown, the invention provides a kind of preparation method of composite calcium sulfonate antirust agent, comprising:

[0036] Step 1. Under the condition of protective gas, add organic solvent, base oil, alcohol, calcium oxide and water into the reaction kettle, and raise the temperature to 55-60°C; then, add the alkylbenzene sulfonic acid by dropping at a constant speed In the reaction kettle, carry out a neutralization reaction; after reacting for 2 hours, use a pH meter to accurately measure the pH value of the reaction solution, so that the pH is controlled at >10;

[0037] in,

[0038] Preferably add organic solvent, base oil and alcohol to the reaction kettle first, stir and mix evenly, then add calcium oxide and water to the reaction kettle;

[0039] Preferred organic solvents include one or more of benzene, toluene, xylene, 120# solvent, 200# solvent, sherwood oil, n-hexane and n-heptane;

[0040] Preferred base oils include one or more of 1...

Embodiment 1

[0059] The present invention provides a kind of preparation method of composite calcium sulfonate antirust agent, comprising:

[0060] 1) Put 300kg of organic solvent, 140kg of base oil, and 50kg of alcohol into a 1000L reactor, stir for 20 minutes to mix evenly; then put in 10kg of calcium oxide, 10kg of water, and stir for 30 minutes; take 75kg of carbon chain length C18-C24 alkylbenzene The sulfonic acid was added dropwise at a uniform speed within 60-90min, and the temperature was raised to 55-60°C; the neutralization reaction was 2h, and the pH value of the neutralization reaction solution was recorded.

[0061] 2), after the first stage of neutralization, add 50kg of alkyl salicylic acid with a carbon chain length of C22-C24, 10kg of oleic acid, 10kg of maleic anhydride, 5kg of dodecylphenol, 5kg of water, and 2kg of calcium oxide in sequence. Raise the temperature to 75-80°C, neutralize for 2 hours, and record the pH value of the neutralization reaction solution.

[00...

Embodiment 2

[0065] The present invention provides a kind of preparation method of composite calcium sulfonate antirust agent, comprising:

[0066] 1) Put 300kg of organic solvent, 140kg of base oil, and 50kg of alcohol into a 1000L reactor, stir for 20 minutes to mix evenly; then put in 10kg of calcium oxide, 10kg of water, and stir for 30 minutes; take 75kg of carbon chain length C22~C24 alkylbenzene The sulfonic acid was added dropwise at a uniform speed within 60-90min, and the temperature was raised to 55-60°C; the neutralization reaction was 2h, and the pH value of the neutralization reaction solution was recorded.

[0067] 2), after the first stage of neutralization, add 50kg of alkyl salicylic acid with a carbon chain length of C22-C24, 10kg of oleic acid, 10kg of maleic anhydride, 5kg of dodecylphenol, 5kg of water, and 2kg of calcium oxide in sequence. Raise the temperature to 75-80°C, neutralize for 2 hours, and record the pH value of the neutralization reaction solution.

[00...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N30/12
CPCC10M169/045C10M2203/1006C10M2219/044C10M2207/144C10M2207/126C10M2207/027
Inventor 张超卜卫元王龙龙范金凤李学文
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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