Production process for preparing alkanol amide based on crude oil as raw material

Abstract

The invention relates to a synthesis method for preparing alkanol amide based on crude oil as a raw material, aiming at providing a synthesis method for preparing the alkanol amide, wherein the method has a reasonable process, is simple to operate and the loss of the crude oil can be effectively. The technical scheme successively comprises the following steps: A, directly decoloring the crude oil; B, calculating the total feed quantity of alkanol amide, wherein the weight ratio of crude oil to alkanol amide is 1: (0.2-1.0); C, mixing 1-10% of decolored crude oil and 3-50% of alkanol amide and then carrying out a reaction on the mixture for 1-24 hours at the temperature of 100-180 DEG C under the pressure of 0.009-0.015MPa; D, cooling the reacted material to 50-100 DEG C, adding the balance of alkanol amide and a proper amount of catalyst, continuing to react for 1-10 hours at the constant pressure of 0.010-0.009 MPa; and E, insulating until the index meets the requirement so as to obtain the qualified alkanol amide product.

Description

technical field [0001] The invention relates to a synthesis method for preparing alkanolamides by using crude oil as a raw material, and belongs to the technical field of synthesis of amide compounds in organic chemistry. Background technique [0002] Alkanolamide compounds have strong hydrolysis resistance due to the presence of amide bonds in their molecules, and have low toxicity, good biodegradability, no skin irritation, and excellent foam enhancement, foam stabilization, thickening, decontamination and emulsification, etc. It is an excellent non-ionic surfactant and an intermediate for further synthesis of other surfactants. Therefore, it can be used as a foam accelerator, foam stabilizer, antirust agent, antistatic agent and dispersant, etc., and can be widely used in industrial fields such as detergents, cosmetics, plastics, textile auxiliaries, metal cleaning and processing. [0003] Alkanolamides have the general formula RCONH x (C n h 2n Oh) y (x=0,1; y=1,2; ...

AI Technical Summary

Problems solved by technology

[0014] 1) During alkali refining, oil will be hydrolyzed, saponified or soap will be contained in the lower layer, resulting in material loss;

[0015] 2) The crude oil is neutralized by dilute alkali to produce alkali refining wastewater which is alkaline, and generally needs to be neutralized with acid before entering the sewage treatment system, which contains some organic substances, and the sewage COD is above 10000 mg / L; the alkali refining oil layer contains fatty acid sodium , Free alkali is generally washed with dilute brine, and waste water will be generated during washing, which will pollute the environment

The amount of waste water is large, and the treatment pressure is very high;

[0016] 3) Soapstock water is produced during the alkali refining and deacidification process of crude oil, and its main components are soap base, water and some oil, which is complicated to handle and causes secondary pollution at the same time;

[0017] 4) The oil after static stratification needs to be vacuum dehydrated, which increases energy consumption