Method for converting calcium alkylbenzene sulfonate into sodium alkyl benzene sulfonate

A technology of calcium alkyl benzene sulfonate and sodium alkyl benzene sulfonate, applied in the fields of sulfonate preparation, organic chemistry, etc., can solve the problems such as the inability to effectively remove calcium and calcium alkyl benzene sulfonate, and the inability to remove calcium ions, Achieve the effect of easy separation and purification, easy operation and guaranteed purity

Active Publication Date: 2015-03-04
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing treatment methods, such as the method of adding sodium carbonate for precipitation, due to the particularity of the surfactant part in the detergent, it cannot be combined with the carbonate in the solution to form calcium carbonate precipitation, so it does not Calcium in calcium alkylbenzene sulfonate cannot be effectively removed; and the method of using cation exchange resin cannot effectively remove calcium ions after long-term treatment

Method used

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  • Method for converting calcium alkylbenzene sulfonate into sodium alkyl benzene sulfonate
  • Method for converting calcium alkylbenzene sulfonate into sodium alkyl benzene sulfonate
  • Method for converting calcium alkylbenzene sulfonate into sodium alkyl benzene sulfonate

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Embodiment 1

[0028] The present embodiment provides a kind of method that calcium alkylbenzene sulfonate is converted into sodium alkylbenzene sulfonate, comprising the following steps:

[0029] Place a 500mL single-necked flask in a water bath with a magnetic stirrer and heating function, and successively add 0.7mL of 30% sodium hydroxide solution and 2.38g of calcium alkylbenzenesulfonate into the single-necked flask. Calcium benzenesulfonate is a mixture, its alkyl chain length is C 16 -C 30 (take C 26 The molecular weight of the calcium alkylbenzenesulfonate is used as the average molecular weight of the calcium alkylbenzenesulfonate, and the molar mass is 544.39g / mol), and the stirring is started and carbon dioxide gas is introduced into the single-necked flask at a speed of 10mL / min, and the controlled reaction temperature is 30°C;

[0030] Keep the reaction for 3 hours, it can be seen that there is precipitation in the reaction solution, the pH of the test solution is 8, and the r...

Embodiment 2

[0036] The present embodiment provides a kind of method that calcium alkylbenzene sulfonate is converted into sodium alkylbenzene sulfonate, comprising the following steps:

[0037] Place a 500mL single-necked flask in a water bath with a magnetic stirrer and a heating function, and add 1.2mL of 10% sodium hydroxide solution and 0.65g of calcium alkylbenzenesulfonate into the single-necked flask. Calcium sulfonate is a mixture with an alkyl chain length of C 16 -C 30 (take C 26 The molecular weight of the calcium alkylbenzenesulfonate is used as the average molecular weight of the calcium alkylbenzenesulfonate, and the molar mass is 544.39g / mol), and the stirring is started and carbon dioxide gas is passed into the single-necked flask at a speed of 30mL / min, and the controlled reaction temperature is 60°C;

[0038] Keep the reaction for 2 hours, it can be seen that there is precipitation in the reaction solution, the pH of the test solution is 7, and the reaction is stopped;...

Embodiment 3

[0044] The present embodiment provides a kind of method that calcium alkylbenzene sulfonate is converted into sodium alkylbenzene sulfonate, comprising the following steps:

[0045] Place a 500mL single-necked flask in a water bath with a magnetic stirrer and a heating function, and add 0.76mL of 25% sodium hydroxide solution and 1.3g of calcium alkylbenzenesulfonate into the single-necked flask. Calcium sulfonate is a mixture with an alkyl chain length of C 16 -C 30 (take C 26The molecular weight of the calcium alkylbenzenesulfonate is the average molecular weight of the calcium alkylbenzenesulfonate, and the molar mass is 544.39g / mol), and the stirring is started and carbon dioxide gas is introduced at a speed of 15mL / min, and the controlled reaction temperature is 50°C;

[0046] Keep the reaction for 2.5 hours, it can be seen that there is precipitation in the reaction solution, the pH of the test solution is 8, and the reaction is stopped;

[0047] After cooling, use a ...

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Abstract

The invention provides a method for converting calcium alkylbenzene sulfonate into sodium alkyl benzene sulfonate. The method comprises the following steps: dispersing calcium alkylbenzene sulfonate in a sodium hydroxide solution, wherein a molar ratio of calcium alkylbenzene sulfonate to sodium hydroxide is 1:(1.2-2.5); heating the solution to 30-60 DEG C, introducing CO2 gas into the solution under the stirring condition, stopping the reaction when the pH value is 7-8, thus obtaining the reaction solution, cooling the reaction solution, performing filtering treatment, removing the precipitate so as to obtain the filtrate, evaporating the solvent out of the filtrate, thereby obtaining the sodium alkyl benzene sulfonate. The method provided by the invention is easy to operate and high in calcium removal efficiency and is beneficial to the subsequent analysis on alkylbenzene sulfonate.

Description

technical field [0001] The invention provides a method for converting calcium alkylbenzene sulfonate into sodium alkylbenzene sulfonate, belonging to the technical field of sodium alkylbenzene sulfonate preparation. Background technique [0002] Detergent is a common additive in lubricating oil products. It is a kind of spherical substance composed of surfactants and inorganic salts wrapped in them. According to the type of surfactants, it is divided into sulfonate and sulfurized alkylphenate. And salicylate detergents, among them, sulfonate detergents are the most commonly used and the largest amount of detergents. [0003] The surfactant in the detergent has a great influence on the performance of lubricating oil products, especially in marine lubricating oil products, the surfactant part in the sulfonate detergent determines the anti-rust performance, anti-emulsification performance and distribution of the product. water performance. [0004] At present, the analysis of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C309/31
CPCC07C303/32C07C309/31
Inventor 冯涛翟月奎于军
Owner PETROCHINA CO LTD
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