Preparation method of novel isopropanolamine

Abstract

The invention provides a preparation method of novel isopropanolamine. The preparation method comprises the following steps: (1) preparing a catalyst; (2) preparing diethanol amine; (3) synthesizing diethanolisopropanolamine. In the method, liquid ammonia, ethylene oxide and propylene oxide are taken as raw materials, and the diethanolisopropanolamine is synthesized in two steps; when the liquid ammonia and the ethylene oxide are used for synthesizing the diethanol amine, a molecular sieve catalyst is adopted, so that the generation of triethanolamine is inhibited effectively, the production of monoethanolamine is reduced by increasing the molar ratio of ethylene oxide to the liquid ammonia, the yield of the diethanol amine is increased, and the yield of the diethanolisopropanolamine is increased. Since byproducts in a final product are all alcohol amine substances which can be used directly in the production of a cement grinding aid, thereby simplifying the production process and lowering the production cost.

Description

Technical field [0001] The invention belongs to the field of organic synthesis, and specifically relates to a method for preparing a novel isopropanolamine. Background technique [0002] Alcoholamines are an important class of organic compounds. With their unique structure and charge distribution, they are usually used as surfactants and are widely used in various fields such as chemical raw materials, pigments, medicine, and building materials. my country achieved industrial production in the 1960s. Diethanol monoisopropanolamine is one of many alcohol amines, which was designed and developed in the 1940s and 1950s. With the application of dendrimers in the biomedical field from simple drug delivery carriers to complex medical imaging, the important raw material for its synthesis, diethanol monoisopropanolamine, has attracted attention. As a surfactant, diethanol monoisopropanolamine has excellent grinding aids and improves the early strength of cement. It has been prominent i...

AI Technical Summary

Problems solved by technology

Patent CN103224453A uses water as a solvent, and uses propylene oxide and diethanolamine as raw materials to prepare diethanol monoisopropanolamine. The defect of this method is that the alkylamine is relatively high, and excessive propylene oxide is difficult to recycle. At the same time, excessive epoxy Propane will accelerate the formation of by-products, and the presence of solvent water makes propylene oxide partially hydrolyzed, reducing the utilization rate of propylene oxide

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