Method for preparing high-alkali value (TBN300) synthesized calcium alkyl benzene sulfonate

A technology of calcium alkyl benzene sulfonate and alkyl benzene sulfonic acid is applied in the preparation of sulfonic acid, lubricating composition, additives, etc., and can solve the problems of high production cost and product price, poor product anti-foaming, poor product quality, etc. , to achieve the effect of low production and processing cost, good foam resistance and low cost

Active Publication Date: 2008-12-10
JINZHOU DPF TH CHEM CO LTD
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Problems solved by technology

Although the "one-step" process solves the problems of backward technology, complex operation, long production cycle, low product yield, poor product quality and poor pe

Method used

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  • Method for preparing high-alkali value (TBN300) synthesized calcium alkyl benzene sulfonate

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Example Embodiment

[0022] Example 1

[0023]The process is: mix the mixed acid of long-chain linear alkylbenzene sulfonic acid and high-boiler heavy alkylbenzene sulfonic acid with calcium oxide and / or calcium hydroxide, low-carbon alcohol, alkaline earth metal halide, polyisobutenyl The mixture of succinic anhydride, alkaline earth metal alkylphenol and diluent oil is neutralized at 40°C in the presence of alkanes, aromatic hydrocarbons or low-carbon alcohols with a boiling point higher than 80°C as a solvent, and then carbon dioxide is introduced The carbonation reaction was carried out at a temperature of 40°C. The carbonation reaction is completed once, that is, calcium oxide and / or calcium hydroxide is added at one time, and carbon dioxide is introduced at a rate of 0.1L / min. The molar ratio of the amount of carbon dioxide introduced to the total amount of calcium oxide and / or calcium hydroxide 0.72:1 until the end of the carbonation reaction. Then heat up to 140°C to remove solvents and ...

Example Embodiment

[0026] Example 2

[0027] The process is: mix the mixed acid of long-chain linear alkylbenzene sulfonic acid and high-boiler heavy alkylbenzene sulfonic acid with calcium oxide and / or calcium hydroxide, low-carbon alcohol, nitrate, polyisobutenyl butane The mixture of acid anhydride, alkaline earth metal alkyl phenate and diluent oil is neutralized at 80°C in the presence of alkanes, aromatic hydrocarbons or low-carbon alcohols with a boiling point higher than 80°C as a solvent, and carbon dioxide is introduced into the The carbonation reaction was carried out at a temperature of 60°C. The carbonation reaction is carried out in three times, that is, calcium oxide and / or calcium hydroxide is added in three times, and carbon dioxide is introduced in three times at a rate of 2.5L / min. The amount of carbon dioxide introduced is the same as that of calcium oxide and / or calcium hydroxide. The molar ratio of the total amount is 0.90:1 until the carbonation reaction ends. Then heat ...

Example Embodiment

[0030] Example 3

[0031] The process is: mix the mixed acid of long-chain linear alkylbenzene sulfonic acid and high-boiler heavy alkylbenzene sulfonic acid with calcium oxide and / or calcium hydroxide, low-carbon alcohol, alkaline earth metal halide, polyisobutenyl The mixture of succinic anhydride, alkaline earth metal alkylphenol and diluent oil is neutralized at 60°C in the presence of alkanes, aromatic hydrocarbons or low-carbon alcohols with a boiling point higher than 80°C as a solvent, and then carbon dioxide is introduced The carbonation reaction was carried out at a temperature of 50°C. The carbonation reaction is carried out twice, that is, calcium oxide and / or calcium hydroxide is added in two times, and carbon dioxide is introduced in two times at a rate of 1L / min. The amount of carbon dioxide introduced is equal to the total amount of calcium oxide and / or calcium hydroxide. The molar ratio of the amounts was 0.80:1 until the carbonation reaction was completed. ...

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Abstract

The invention provides a method for preparing high base number (TBN300) synthetic calcium alkyl-benzene sulfonate. The method comprises the following steps of: adopting a mixed acid of long-chain linear alkyl-benzene sulfonic acid and high-boiling heavy alkyl-benzene sulfonic acid, calcium oxide and/or calcium hydroxide, low-carbon alcohol, alkaline-earth metal halide or nitrate, and a mixture ofpolyisobutylene succinic anhydride and alkaline-earth metal alkylphenol or alkaline-earth metal alkylphenate for a neutralization reaction in the presence of a solvent and cutback oil at a temperature of between 40 and 80 DEG C; then, passing through carbon dioxide to a product of the neutralization reaction at a temperature of between 40 and 60 DEG C for a carbonation reaction; and refining the product to produce high base number synthetic alkyl-benzene sulfonate with a total base number (TBN) of 300mgKOH/g. The product is divided into high-base number (TBN300) synthetic alkyl-benzene sulfonate containing chlorine and high-base number (TBN400) synthetic alkyl-benzene sulfonate without the chlorine. The method has the advantages of simple process, low cost, high yield and excellent economical efficiency; the product has the advantages of low viscosity, small turbidity, easy filtration, excellent high-temperature detergency, excellent anti-foaming property and excellent heat storage stability; and when the product is used to prepare lubricant, the comprehensive performance of the lubricant can be improved, the service life of an engine can be prolonged, and environmental pollution can be reduced.

Description

technical field [0001] The invention relates to a preparation method for synthesizing calcium alkylbenzene sulfonate with high alkali value (TBN300). Background technique [0002] High base number (TBN 300) synthetic calcium alkylbenzene sulfonate is a kind of lubricating oil additive. It is the most widely used and used lubricating oil detergent. It is the main additive component for preparing medium and high-grade internal combustion engine oil. Adding it to the oil can effectively neutralize the acidic substances produced by the corrosion of the machine parts and the oxidation of the oil; compounded with other additives, it can improve the detergency and dispersibility of the lubricating oil, disperse and wash the crankcase Sludge, paint film and soot, remove the deposits formed on the surface of the engine and keep it clean, prolong the service life of the engine and reduce environmental pollution. [0003] At present, there are two types of methods for preparing calciu...

Claims

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Application Information

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IPC IPC(8): C07C309/30C07C309/62C07C303/22C10M135/10C10N30/04
Inventor 魏奇
Owner JINZHOU DPF TH CHEM CO LTD
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