Method for preparing spherical anion surfactant

Abstract

The invention provides a method for preparing a spherical anion surfactant with little pollution, low forming temperature, short time and good physicochemical property. The method comprises the stepsof adopting a granulating process of extruding and rolling to mix anion surfactant main material and auxiliary granulating material, conveying the mixture into an extruder consisting of a screw feeder, an extruding cylinder and a mesh plate, and processing the mixture to prepare round bar-shaped materials with different lengths; conveying the round bar-shaped materials into a rolling granulator; cutting the round bar-shaped materials into the short cylindrical material grains with consistent lengths by breaking teeth on a rotating centrifugal rotary table of the rolling granulator, subsequently kneading all materials into spherical grains under the cooperation of the centrifugal rotary table, the grains, the granulator walls and the gas among the granulator walls, subsequently drying and cooling the spherical grains to obtain the spherical anion surfactant with the solid content of 95-99.5% by weight percentage. The method is applicable to the production of surfactant.

Description

technical field [0001] The invention relates to a manufacturing method of a spherical anionic surfactant product. The product can be used in civil and industrial cleaning agents, foaming agents for building materials and other products. Background technique [0002] In addition to being supplied in liquid form with a certain concentration (containing ~35% or ~70% active matter), anionic surfactants are also available in the form of powder (fine irregular particles), granules (slightly larger irregular particles), tablets, etc. It is supplied in solid form such as shape or needle (round bar) shape. Previously, solid form anionic surfactants were manufactured by: [0003] The low-concentration slurry with a water content of 60-70% (weight) is used as a raw material, and is prepared by a high-tower spray-drying method. Such as, Japanese patent: JP 55-69698, JP 53-39037, Chinese patent: the disclosed manufacturing method of ZL00131365.7; Prepared by spray drying. Such as Ja...

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to solve the problem that the existing anionic surfactant production methods cannot produce spherical anionic surfactants with easy-to-control particle size, uniform particle size, and suitable particle density and strength, which leads to difficulty in dissolving the anionic surfactant and making it difficult to produce and use. The problem of polluting the environment, and solving the problem that the existing production method has high granulation pressure and high drying temperature, which is not suitable for the manufacture of heat-sensitive anionic surfactants, and the problem that the existing production method has a risk of thermal decomposition of the product due to the high calorific value , provide a kind of manufacture method of spherical anionic surfactant of the present invention for this reason, this method can realize dust-free in the whole process of product manufacture and use, has eliminated pollution and improved working condition; The product spherical shape that this method manufactures The particle strength is suitable, easy to dissolve and not easy to pulverize; this method has short molding time and low temperature, which eliminates the risk of decomposition of heat-sensitive materials