Method for preparing overbased synthesized heavy alkyl benzene calcium sulfonate

The technology of calcium heavy alkyl benzene sulfonate and heavy alkyl benzene sulfonic acid is applied in the field of lubricating oil and lubricating grease, which can solve the problem of anti-foaming performance, high temperature thermal stability and cleaning performance, oil solubility and susceptibility to oil products, etc. Problems such as poor effect, excessive precipitation, and high product viscosity can ensure the quality and performance, improve the reaction efficiency, and maintain strong alkali value.

Active Publication Date: 2009-10-07
LIAONING BODA CHEM
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Problems solved by technology

The main raw material for the domestic industrialized two-step production of ultra-high base value synthetic heavy alkylbenzene sulfonate calcium heavy alkylbenzene sulfonic acid is the high boiling product after the extraction of C10-C14 alkylbenzene, which is the heavy component above C14. , and remove the products before C18 and after C24 by distillation and separation to obtain heavy alkylbenzene between C18 and C24, and then undergo membrane or mist sulfonation to produce ultra-high base value synthetic heavy alkylbenzene sulfonic acid As the main material of calcium, add a single solvent butanol or 80-180°C gasoline or 120# solvent oil or 180# solvent oil, add alkaline earth metal halides, add calcium hydroxide or calcium oxide for neutralization reaction, after the reaction , carry out desolvation and low volatile matter operation, then lower the temperature, then add the above-mentioned single solvent, alkaline earth metal halide and dodecylphenol, then put in calcium hydroxide or calcium oxide, pass into carbon dioxide to carry out carbonation reaction, when the total alkali When the value rea

Method used

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  • Method for preparing overbased synthesized heavy alkyl benzene calcium sulfonate

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example 1

[0030]In a container with an electric stirrer, condensation dehydrator and thermometer, add 2060g of a mixture of synthetic heavy alkylbenzene sulfonic acid and base oil. The base oil in this example is Class I base oil 350SN, of which 1260g of base oil, synthetic 787.5g of heavy alkylbenzenesulfonic acid, add 165g of mixed solvent, the mixed solvent in this example is 80-180°C distillation range gasoline and butanol, of which 80-180°C distillation range gasoline 82.5g, butanol 82.5g, add alkaline earth 41.2g of metal halides, calcium chloride was selected in this example; 100g of mixed alkaline calcifications were added, including 91g of calcium hydroxide and 9g of calcium oxide; the above materials were neutralized for 1 hour at 40°C, and after the reaction was finished, the Desolvation and low volatile matter operation are carried out under normal pressure or negative pressure. When the temperature reaches 135°C, add 30g of diatomite filter aid to filter, and return all the...

example 2

[0032] In a container with an electric stirrer, condensation dehydrator and thermometer, add 2060g of a mixture of synthetic heavy alkylbenzene sulfonic acid and base oil. The base oil in this example is Group II oil 150BS, of which 150BS is 1124g of synthetic Heavy alkylbenzene sulfonic acid 936g, add mixed solvent 250g, this example selects mixed solvent to be 120# solvent oil and butanol, the weight of 120# solvent oil and butanol is each 125g, adds alkaline earth metal halide 82.5g, this example The choice is magnesium chloride; add 100g of mixed alkaline calcification, including 50g of calcium hydroxide and 50g of calcium oxide; neutralize the above materials for 1 hour at 60°C, and desolventize under normal or negative pressure after the reaction and low volatile operation. When the temperature reaches 150°C, add 35g of diatomite filter aid to filter, return all the normal salt products after filtration to the three-necked bottle, cool down to 60°C, and add 250g of mixed...

example 3

[0034] In a container with electric stirrer, condensation dehydrator and thermometer, add 2060g of a mixture of synthetic heavy alkylbenzene sulfonic acid and base oil. In this example, the type III base oil PAO-8, 915g, heavy alkyl Benzenesulfonic acid is 1145g, add mixed solvent 310g, this example chooses mixed solvent to be isopropanol 155g, xylene 155g; Alkaline earth metal halide 124g, what this example chose is zinc chloride; Add mixed alkaline calcification 100g, wherein Calcium hydroxide 9g, calcium oxide 91g; the above materials were neutralized at 80°C for 1 hour, and after the reaction was completed, desolvation and low volatile content operations were performed under normal or negative pressure. When the temperature reaches 160°C, add 40g of diatomaceous earth, filter the filter aid to obtain the synthetic heavy alkylbenzenesulfonate calcium normal salt, put all the filtered normal salt back into the three-necked bottle, cool down to 60°C, add the mixed Solvent 310...

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Abstract

A method for preparing overbased synthesized heavy alkyl benzene calcium sulfonate comprises the steps of adding synthesized heavy alkyl benzene sulfonate, base oil, component solvent, alkaline-earth metals halide and mixed alkaline calcium compound to a container and carrying out neutralization reaction for 1 hour at the temperature of 40 DEG C; carrying out operations of desolventizing and low-volatilisation at normal or negative pressure after the reaction is over; adding super cell for filtering when the temperature reaches 135 DEG C; totally returning normal salt products obtained by filtering to the 3-mouth flask; adding the component solvent, component accelerant and the mixed alkaline calcium compound when the temperature decreases to 60 DEG C; controlling the reaction temperature to be between 30 DEG C and 40 DEG C and introducing carbon dioxide at flow velocity of 20g/minute for carbonatation reaction; and carrying out desolventizing on carbonated compound at normal pressure and adding filter aid for filtering to obtain the finished product. When applied to industrial oil, the obtained product has extreme pressure property and protective property to metal surface; and when applied to calcium sulfonate complex grease, the obtained product has excellent conversion property, better water resisting property, high-temperature resisting property and rigid operation environment resisting property, thus reducing contamination to environment.

Description

technical field [0001] The invention relates to a method for preparing calcium heavy alkylbenzene sulfonate synthesized with ultra-high base value. The product is widely used in the industries of industrial lubricating oil, internal combustion engine oil and lubricating grease, and belongs to the field of lubricating oil and lubricating grease. Background technique [0002] Ultra-high base value synthetic heavy alkylbenzene sulfonate calcium, as a detergent in lubricating oil additives, is the most widely used among many metal detergents. It is compounded with dispersants in internal combustion engine oils, and the total amount accounts for the entire composite agent. More than 50% of the total amount, adding it to oil products can effectively neutralize the acidic substances produced by oxidation of high-temperature oil products. It has alkali value retention and can improve the cleanliness and dispersibility of lubricating oil, washing and dispersing pistons , Piston rings...

Claims

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Application Information

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IPC IPC(8): C07C303/32C07C309/31C10M135/10C10N30/04C10N30/06C10N30/18C10N30/12C10N40/25
Inventor 刘明关新军曹宇
Owner LIAONING BODA CHEM
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