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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, high product viscosity, etc., can ensure the quality and performance, improve the reaction efficiency, and maintain strong alkali value.

Active Publication Date: 2012-03-28
LIAONING BODA CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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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-C24, and then through 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 reaches 150mgKOH / g-200mgKOH / g, remove the solvent, add filter aid to filter, cool down the material, repeat the above carbonation reaction, after the carbonation reaction is completed, remove the solvent, add filter aid to filter to obtain ultra-high alkali Value synthetic heavy alkylbenzene sulfonate calcium products, due to the use of a single solvent, a single accelerator and a single calcium hydroxide or calcium oxide as reactants, the ultra-high base value synthetic heavy alkylbenzene sulfonic acid produced by the current production process conditions The total base value of calcium products is 385-395mgKOH / g, and its anti-foaming performance, high temperature thermal stability, detergency, oil solubility and susceptibility to oil are poor, which is far from meeting the needs of improving oil quality, energy saving and environmental protection etc., the product produced by this method has high viscosity, high turbidity, and a lot of sedimentation, which is easy to cause scratches on the engine block, resulting in poor air tightness of the block and shortening the service life of the engine

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  • Method for preparing overbased synthesized heavy alkyl benzene calcium sulfonate

Examples

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example 1

[0029]Example 1: Add 2060g of a mixture of synthetic heavy alkylbenzene sulfonic acid and base oil into a container with an electric stirrer, condensation dehydrator and a thermometer. The base oil in this example is Class I base oil 350SN, where the base oil 1260g, synthesize 787.5g of heavy alkylbenzene sulfonic acid, add 165g of mixed solvent, the mixed solvent used in this example is 80-180°C distillation range gasoline and butanol, of which 80-180°C distillation range gasoline is 82.5g, butanol is 82.5g , adding 41.2g of alkaline earth 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 the reaction After the end, 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...

example 2

[0030] Example 2: Add 2060g of a mixture of synthetic heavy alkylbenzene sulfonic acid and base oil into a container with an electric stirrer, condensation dehydrator and a thermometer. The base oil in this example is Group II oil 150BS, of which the base oil is 150BS 1124g, synthesize 936g of heavy alkylbenzenesulfonic acid, 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 respectively 125g, adds alkaline earth metal halide 82.5g In this example, magnesium chloride was selected; 100g of mixed alkaline calcification was added, including 50g of calcium hydroxide and 50g of calcium oxide; Carry out solvent removal and low volatile content 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 container, cool down to 60°C and add 250g of mixed solvent. In this example, 120# solvent oil and Butan...

example 3

[0031] Example 3: In the container with electric stirrer and condensation dehydrator and thermometer, add the mixture of the synthetic heavy alkylbenzene sulfonic acid of 2060g and base oil, what this example selects is III type base oil PAO-8, 915g, Sulfonic acid is 1145g, add mixed solvent 310g, this example selects mixed solvent to be isopropanol 155g, xylene 155g; Alkaline earth metal halide 124g, what this example selects is zinc chloride; Add mixed alkaline calcium compound 100g, wherein hydrogen Calcium oxide 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 diatomite filter aid to filter to obtain the synthetic calcium normal salt of heavy alkylbenzenesulfonate, put all the filtered normal salt back into the container, cool down to 60°C, and add the mixed solve...

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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 temperatureto 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 pressureand 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

[0001] Technical field [0002] 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 [0003] 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 , Pisto...

Claims

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Application Information

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