Method for producing alkanolamide by taking crude oil as raw material

Abstract

The invention relates to a method for producing alkanolamide by taking crude oil as a raw material, which has the characteristics that the method is simple to operate and can effectively reduce the crude oil consumption and waste water output. The method adopts the technical scheme that the method for producing the alkanolamide by taking the crude oil as the raw material comprises the following steps that A, the crude oil is directly decolorized; B, a given amount of alkanolamine is added according to the fatty acid content in the decolorized crude oil, the alkanolamine and the crude oil are stirred for 10-120 min and heated to 30-80 DEG C, and the addition weight of the alkanolamine is 1-10 times the weight of fatty acid in the crude oil; C: amine degradation products are separated, amine soap is obtained at the lower layer, and essential oil with a lower acid value is obtained at the upper layer; D: the essential oil at the upper layer reacts with the alkanolamine and catalyst according to a glyceride process at a low temperature to produce the alkanolamide; and E: the amine soap at the lower layer reacts at a high temperature according to a fatty acid process, and continues to react at a low temperature after the catalyst is added to obtain the alkanolamide.

Description

technical field [0001] The invention relates to an oil refining process in the production of alkanolamides, which is suitable for the technical field of oil production alkanolamides. Background technique [0002] Alkanolamides (i.e. fatty acid alkanolamides) have excellent foam increasing, foam stabilizing, thickening, decontamination and emulsifying properties, and have a certain antistatic ability and rust resistance, so they can be used as foam accelerators, foam stabilizers, etc. Agents, antirust agents, antistatic agents and dispersants, etc., especially its non-toxic, harmless and high biodegradation rate, can be widely used in detergents, cosmetics, plastics, textile auxiliaries, metal cleaning and processing, etc. In the industrial field, it is a nonionic surfactant with large domestic production and consumption. [0003] According to the different raw materials used, the current industrial production of fatty acid alkanolamides is generally made of coconut oil, pal...

AI Technical Summary

Problems solved by technology

[0008] 1) During alkali refining, oil will be hydrolyzed, saponified or soap will be contained in the lower layer, resulting in material loss;

[0009] 2) The alkali refining wastewater produced by the neutralization of crude oil with dilute alkali is alkaline, and generally needs to be added to the acid neutralization before entering the sewage treatment system; the wastewater contains some organic substances, and the COD of the sewage is above 10000mg / L; the alkali refining layer contains Fatty acid sodium and free alkali generally need to be washed with dilute brine, and waste water will be generated during washing; therefore, the total amount of waste water produced by this method is relatively large, the treatment pressure is high, and it is easy to pollute the environment

[0010] 3) The soapstock water produced during the deacidification process of crude oil alkali refining is mainly composed of soap base, water and some oil, which is complicated to handle and causes secondary pollution at the same time