Production process for performing oxyalkylation on alkynol

Abstract

The invention relates to a production process for performing oxyalkylation on alkynol. The invention aims to provide an alkynol oxyalkylation production process, in which the reaction condition is mild and the reaction process can be controlled. According to the technical scheme, the production process comprises the following steps of: adding preheated alkynol into a reaction kettle, adding a catalyst, and stirring uniformly at constant temperature; adding one or more alkylene oxides into the reaction kettle, controlling the temperature and the pressure of the reaction kettle to be within a certain range in the alkylene oxide adding process, keeping constant temperature for a period of time after adding the alkylene oxides, and neutralizing; and distilling under reduced pressure to remove water and light components from materials thus obtaining the product. According to the production process, the reaction condition is mild, high-pressure equipment is not needed, and complete controllability in a production process is achieved; the reaction temperature is low, so the strongly alkaline component contained in the catalyst component can improve the catalytic efficiency and does not cause side reaction such as alkynol cracking; the reaction temperature is low, so the alkylene oxide with low boiling point is not gasified during reaction to increase the pressure, and the safety is improved; and the production efficiency is improved, the product has high purity and energy is saved.

Description

technical field [0001] The invention relates to a production process for the alkoxylation of acetylenic alcohols. Background technique [0002] Alkynyl alcohols are a class of fine chemical products widely used in many fields. From the perspective of molecular structure, alkynyl alcohol contains alkynyl group, polar group hydroxyl group and non-polar group aliphatic carbon chain. This structure determines that alkynyl alcohol compounds have many excellent properties, such as surface active properties. [0003] However, due to the small volume of the hydrophilic group (hydroxyl group) of acetylenic alcohols, the hydrophilicity of acetylenic alcohols is poor, which limits its application in the water-based field. Under the trend of environmental protection, modifying acetylenic alcohols to make them have good hydrophilicity can make acetylenic alcohols more widely used and more environmentally friendly. [0004] There are many methods for the modification of acetylenic alcoh...

AI Technical Summary

Problems solved by technology

[0006] The high pressure method requires high pressure, which is dangerous to the operator, and has high requirements for the reaction vessel, that is, the production cost also increases accordingly; and because the volume of the pressure vessel is limited, the high pressure method cannot add more rings at one time. Oxyalkylene, when more alkylene oxide needs to be added, it needs to be added step by step in multiple steps

The solvent method, however, has low production efficiency, requires a large amount of heat when the solvent is evaporated, and needs to add evaporation equipment in the process flow, which consumes energy and time; in addition, the product will have residual organic solvents, making the prepared alkyne The purity of alcohol alkoxylation products is not high, so it cannot be applied in some fields