Preparation method of alkylbenzene sulfonic acid organic amine salt

Abstract

The present invention belongs to the field of green environment-friendly surfactants, and specifically relates to a preparation method of an alkylbenzene sulfonic acid organic amine salt. The method is as below: heating a raw material of alkylbenzene sulfonic acid in a preheater to 60-70 DEG C, stirring, then mixing an organic amine liquid with alkylbenzene sulfonic acid by ratio; and introducing the mixture into a reactor bottom distributor for reaction, controlling the reaction temperature at 30-200 DEG C, and reacting under a pressure of 0.01-4.0MPa. the present invention has the advantages that alkyl benzene sulfonic acid with rich inexpensive resources and narrow usage is used as the raw material to reduces the cost of raw materials and develop novel application for alkyl benzene sulfonic acid; the method achieves recycling of the organic amine vapor in a kettle, shortens the reaction time and increases the utilization of raw materials, and belongs to an environment-friendly chemical reaction.

Description

Technical field:

[0001] The invention relates to a preparation method of an organic amine salt of alkylbenzenesulfonic acid, which belongs to the field of green and environment-friendly surfactants. technical background:

[0002] With people's increasing awareness of environmental protection, safety and health, high-efficiency and environmentally-friendly surfactants have become the focus of research, development and application. As a new type of non-toxic neutral surfactant, alkylbenzenesulfonic acid organic amine salt has super strong The ability to remove oil will be more and more widely used in industry and daily life. The raw material of organic amine salt of alkylbenzenesulfonic acid is mainly dodecylbenzenesulfonic acid, and the price is low. Therefore, detergents using dodecylbenzene as raw materials quickly replaced soap, and dodecylbenzenesulfonic acid metal salt soon became the largest organic surfactant in the world. Although the surfactant varieties used at thi...

Examples

Embodiment 1

[0021] Example 1: The raw material dodecylbenzenesulfonic acid is heated by a preheater, the temperature is raised to 60°C, and it is poured into a reaction kettle with a self-priming double cross stirring system through a metering pump, stirred, and the triethylamine liquid is massaged The molar ratio is 1.2:1. It is metered by the metering pump and limitedly enters the distributor at the bottom of the reactor, and evenly enters the reactor. The reaction temperature is controlled at 50-80°C and the reaction is carried out at a pressure of 0.1-0.3MPa. After the organic amine feeding is completed, continue to react for 2 hours, let the organic amine vapor pass through the self-absorption of the stirring shaft, and circulate in the reactor. After the reaction is completed, the organic amine salt of alkylbenzenesulfonic acid is obtained, and a small amount of unreacted The organic amine vapor is recovered by the recovery system, and then participates in the reaction of the next ke...

Embodiment 2

[0022] Embodiment 2: change raw material triethylamine into dibutylamine, other is the same as embodiment 1.

Embodiment 3

[0023] Embodiment 3: change raw material triethylamine into isopropylamine, others are the same as embodiment 1.

Technical field:

[0001] The invention relates to a preparation method of an organic amine salt of alkylbenzenesulfonic acid, which belongs to the field of green and environment-friendly surfactants. technical background:

[0002] With people's increasing awareness of environmental protection, safety and health, high-efficiency and environmentally-friendly surfactants have become the focus of research, development and application. As a new type of non-toxic neutral surfactant, alkylbenzenesulfonic acid organic amine salt has super strong The ability to remove oil will be more and more widely used in industry and daily life. The raw material of organic amine salt of alkylbenzenesulfonic acid is mainly dodecylbenzenesulfonic acid, and the price is low. Therefore, detergents using dodecylbenzene as raw materials quickly replaced soap, and dodecylbenzenesulfonic acid metal salt soon became the largest organic surfactant in the world. Although the surfactant varieties used at thi...

Examples

Embodiment 1

[0021] Example 1: The raw material dodecylbenzenesulfonic acid is heated by a preheater, the temperature is raised to 60°C, and it is poured into a reaction kettle with a self-priming double cross stirring system through a metering pump, stirred, and the triethylamine liquid is massaged The molar ratio is 1.2:1. It is metered by the metering pump and limitedly enters the distributor at the bottom of the reactor, and evenly enters the reactor. The reaction temperature is controlled at 50-80°C and the reaction is carried out at a pressure of 0.1-0.3MPa. After the organic amine feeding is completed, continue to react for 2 hours, let the organic amine vapor pass through the self-absorption of the stirring shaft, and circulate in the reactor. After the reaction is completed, the organic amine salt of alkylbenzenesulfonic acid is obtained, and a small amount of unreacted The organic amine vapor is recovered by the recovery system, and then participates in the reaction of the next ke...

Embodiment 2

[0022] Embodiment 2: change raw material triethylamine into dibutylamine, other is the same as embodiment 1.

Embodiment 3

[0023] Embodiment 3: change raw material triethylamine into isopropylamine, others are the same as embodiment 1.

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