A kind of continuous separation and purification method of oleic acid amide

Abstract

The invention discloses a method for continuously separating and purifying high-purity oleamide. Industrialized continuous application of separation and purification of oleamide products is realized by a short-path molecular distillation technology and through a set of procedures of first-stage falling film flash, second-stage rotary film fractionation and third-stage short-path molecular distillation; low-boiling-point substances which influence color, odor and melting point of the products and high-boiling-point substances with high viscosity and deep color in the synthesized products are separated and removed successfully; the product purity (total amide content) is high and more than 98.5 percent, the color is good (less than 100 Hazen), the melting point is high (73.9 to 75.1 DEG C), and quality indexes are remarkably increased; and four SGM type shielding pump conveying pumps (PS1-PS4) are adopted, so the vacuum leakage problem of material input and output during continuous operation of the device is solved and continuous and stable operation of the device is guaranteed. The method has the advantages that the separation effect is good; the product yield is obviously increased and the product quality is obviously improved; continuous automatic industrialized stable production is realized; operation convenience and stability are realized; environmental pollution is avoided; and the production cost is low.

Description

technical field [0001] The invention relates to a method for separating and purifying fatty acid amides fine chemicals, in particular to a method for continuously separating and purifying high-purity oleic acid amide. Background technique [0002] Oleic acid amide (CASNO: 301-02-01) is a non-ionic surfactant with excellent performance, and also a very important high-efficiency slip agent in polymer materials such as rubber and plastics, which can reduce the viscosity of films (sheets) and other products. The dynamic and static friction coefficient of the surface can reduce friction, increase the smoothness and smooth feel of the product surface, reduce processing energy consumption, solve the static electricity hazard caused by friction during high-speed extrusion or automatic, high-speed packaging operations, and effectively prevent film cracks Inter-adhesion, as well as to prevent the sticking with the packaged goods, improve the efficiency of packaging operations. Widely...

AI Technical Summary

Problems solved by technology

The traditional solvent crystallization purification process requires solvent dissolution, activated carbon decolorization, hot filtration, cooling crystallization, further filtration, drying, solvent recovery and other processes. There are many processes, long process, poor operating environment, high labor intensity, small scale and high yield Low cost, high cost; In addition: the separation and purification method of oleic acid amide reported in the magazine "Fine Chemical Industry" (2005.NO.2.P54-55) is a batch operation process, and it has a great influence on product color, smell, melting point It is difficult to completely separate the low boilers, and the product yield is still low

[0004] The above two separation and purification processes have great uncertainty, it is difficult to achieve continuous automation, large-scale and stable production, and there are many environmental and safety hazards

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