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Synthesis method of calcium-magnesium salicylate composite detergent

A compound detergent and synthesis method technology, applied in the direction of chemical instruments and methods, preparation of organic compounds, additives, etc., to achieve the effect of improving performance, good stability, thermal oxidation stability and high temperature detergency

Inactive Publication Date: 2015-04-08
QINGDAO BAIZHONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other metal detergents (sulfonate, alkylphenate), salicylate has excellent acid neutralization ability, high temperature detergency, anti-oxidation stability and hydrolysis stability; the raw material of sulfonate is easy to obtain, It is the most used type of detergent at present. Although salicylate and sulfonate are often used in the form of compounding in the actual application process, co-precipitation will occur during the blending process of different detergents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of synthetic method of calcium magnesium salicylate composite detergent, described method comprises the following steps:

[0019] (1) Add 60 parts of alkyl salicylic acid and 180 parts of solvent xylene into a three-necked flask equipped with a stirrer, reflux condenser, water separator and thermometer, add 3 parts of calcium oxide, 15 parts of methanol, 2 parts of accelerator urea, after the temperature rises to 68-78°C, carry out normal salt synthesis reaction for 1 hour;

[0020] (2) After the normal salt reaction, lower the temperature to 60°C, add 1-25 parts of magnesium oxide and mix for 20 minutes, when the reaction temperature drops to 40°C, add 10 parts of distilled water, 5 parts of ammonia water and 2 parts of accelerator ammonium carbonate Among them, water and ammonia water are evenly added within 20 minutes, and carbon dioxide is introduced at a rate of 120mL·min-1 at the same time, and the carbonation reaction is carried out for 3 hours, and the re...

Embodiment 2

[0023] A kind of synthetic method of calcium magnesium salicylate composite detergent, described method comprises the following steps:

[0024] (1) Add 85 parts of alkyl salicylic acid and 200 parts of solvent xylene into a three-necked flask equipped with a stirrer, reflux condenser, water separator and thermometer, add 10 parts of calcium oxide, 25 parts of methanol, Accelerator urea 10 parts, after the temperature rises to 68-78 ℃, carry out normal salt synthesis reaction for 1 hour;

[0025] (2) After the normal salt reaction, lower the temperature to 60°C, add 1-25 parts of magnesium oxide and mix for 20 minutes, when the reaction temperature drops to 40°C, add 15 parts of distilled water, 10 parts of ammonia water and 10 parts of accelerator ammonium carbonate Among them, water and ammonia water are evenly added within 20 minutes, and carbon dioxide is introduced at a rate of 120mL·min-1 at the same time, and the carbonation reaction is carried out for 3 hours, and the r...

Embodiment 3

[0028] A kind of synthetic method of calcium magnesium salicylate composite detergent, described method comprises the following steps:

[0029] (1) Add 75 parts of alkyl salicylic acid and 190 parts of solvent xylene into a three-necked flask equipped with a stirrer, reflux condenser, water separator and thermometer, add 8 parts of calcium oxide, 20 parts of methanol, 8 parts of accelerator urea, after the temperature rises to 68-78°C, carry out normal salt synthesis reaction for 1 hour;

[0030] (2) After the normal salt reaction, lower the temperature to 60°C, add 1-25 parts of magnesium oxide and mix for 20 minutes, when the reaction temperature drops to 40°C, add 12 parts of distilled water, 8 parts of ammonia water and 2 parts of accelerator ammonium carbonate -10 parts, in which water and ammonia water are uniformly added within 20 minutes, and carbon dioxide is introduced at a rate of 120mL·min-1 at the same time, and the carbonation reaction is carried out for 3 hours,...

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Abstract

The invention discloses a synthesis method of a calcium-magnesium salicylate composite detergent in the field of lubricant additives. The method comprises the following steps: adding alkyl salicylic acid and solvent xylene in a reaction container, adding calcium oxide, accelerant, auxiliary promoter and the like in a stirring state, and carrying out a neutralization reaction when a reaction temperature rises to the temperature needed by the neutralization reaction; after the neutralization reaction is ended, adding magnesium oxide, water, ammonia water, auxiliary promoter and the like, charging carbon dioxide and carrying out a carbonation reaction; after the carbonation reaction is ended, carrying out product post-treatment to obtain a lubricant detergent product. The method disclosed by the invention achieves the following beneficial effects: the alkali number of the calcium-magnesium salicylate composite detergent prepared by the method is greater than 400mg KOH / g, the thermal oxidation stability and the high-temperature detergency of lubricant oil are obviously improved, the dispersibility and the wear resistance of the lubricant oil are improved to a certain extent, and the product stability is great.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, in particular to a method for synthesizing a calcium-magnesium salicylate composite detergent. background [0002] Lubricating oil detergent is one of the five major additives of modern lubricating oil (detergent, dispersant, antioxidant, extreme pressure and anti-wear agent, viscosity index improver). The development of horsepower and high power, as well as the increasing requirements of users for oil change intervals, have put forward higher requirements for the performance of lubricating oil. In order to meet these requirements of lubricating oil, it is necessary to add various types of additives to the lubricating base oil. Lubricating oil detergent is an additive developed to improve the acid neutralization ability and cleaning and dispersing function of lubricating oil. [0003] Salicylate is an important class of metal detergents for lubricating oil. In recent years, magnesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/41C07C65/10C10M129/54C10N30/04C10N30/06C10N30/10C10N30/12
CPCC07C51/412C10M129/54C10M2207/262C10N2030/04C10N2030/06C10N2030/10C10N2030/12C07C65/10C10N2010/04
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
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