Process and device for continuously producing powdery sodium alpha-olefin sulfonate

Abstract

The invention relates to a manufacturing process of a powdery surfactant, and aims at providing a process and a device for continuously producing powdery sodium alpha-olefin sulfonate. The productionprocess and the preparation device need to have the characteristics of simple process equipment, energy saving, environment protection and high production efficiency; the obtained powdery sodium alpha-lefin sulfonate active substance has high content and low sultone residue. The process is characterized in that the process for continuously producing the powdery sodium alpha-olefin sulfonate comprises the following steps of (1) sulfonated and aged vinyl sulphonate, caustic soda flakes and neutralized recycled materials enter a neutralizer according to a certain flow rate to be neutralized; (2)the neutralized materials are conveyed through a neutralization conveying pump; one part of the materials are used as recycled materials to be used and enter the neutralizer after being heated by a heater; the other part of materials pass through a back pressure valve and are conveyed from the bottom by a hydrolysis conveying pump to enter a hydrolysis column with a stirrer; meanwhile, a path of high-pressure steam is introduced from the bottom of the hydrolysis column.

Description

technical field [0001] The invention relates to a manufacturing process of powdery surfactant, in particular to a manufacturing process of powdery sodium α-alkenyl sulfonate. technical background [0002] Sodium α-alkenyl sulfonate (AOS) is an anionic surfactant with high foaming and good hydrolytic stability. It has excellent resistance to hard water, low toxicity, mildness, low irritation and good biodegradability. Especially when used in phosphorus-free detergents, it can not only maintain good washing ability, but also has good compatibility with enzyme preparations, and powder (granule) products are not easy to stick and have good fluidity. It can be used in phosphorus-free washing powder, liquid detergent, soap, personal care products, etc., and can be used in textile, printing and dyeing, petroleum, building materials and other industrial fields. [0003] The production process of AOS has been developed relatively maturely. In the production of AOS, sulfur trioxide ...

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Problems solved by technology

[0005] The more advanced drying process of foreign AOS products is the turbulent drying process of Chemithon Company of the United States and the vacuum scraping film drying process of Ballestra Company of Italy. , large energy consumption and other disadvantages

CN101445472 discloses a technology for preparing powdered AOS by direct neutralization and hydrolysis of solid base and alkenyl sulfonate, but the process fails to completely solve the mass transfer problem in the state of high-viscosity material in the late stage of reaction, and requires a relatively excessive amount of solid base to improve Hydrolysis rate, lower product content obtained

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