Phenolic resin and preparation method thereof

Abstract

The invention discloses phenolic resin and a preparation method thereof, belonging to the preparation of resin. The raw materials of the phenolic resin comprise phenol, formaldehyde, paraformaldehyde and the like. The preparation method utilizes the characteristic of low water content of the paraformaldehyde to control the moisture of a phenolic resin finished product by controlling the proportion and the reaction level of the formaldehyde and the paraformaldehyde in the synthesis process of the phenolic resin so as to achieve the purpose of no need of dehydration in the process of preparing the phenolic resin. The invention has the benefits of not only realizing the zero emission of the waste water containing phenol, and eliminating the problem of the environmental pollution of the waste water containing the phenol, but also realizing energy conservation and reducing the emission of greenhouse gases, and further realizing the double win of the economic benefit and the social benefit.

Description

Technical field [0001] The invention relates to a method for preparing resin. Specifically, it is a phenolic resin and its preparation method. Background technique [0002] In the 21st century, China's economy has achieved rapid development, but with the rapid economic development, environmental pollution problems have become more and more serious. The country pays more and more attention to environmental protection. The traditional phenolic resin preparation method is used to prepare phenolic resin. During the production process, a large amount of industrial phenol-containing wastewater is produced. Industrial phenol-containing wastewater is one of the most important harmful wastewaters in my country's water pollution control. Among them, the phenolic resin production wastewater contains high concentration of organic matter such as phenol, aldehyde and resin, which has the characteristics of high organic matter concentration and high toxicity. The processing procedure for this ...

AI Technical Summary

Problems solved by technology

In the traditional preparation method of phenolic resin, because formaldehyde contains a large amount of water, the water in the semi-finished product seriously exceeds the standard, so dehydration operation has to be carried out in the later stage of preparation of phenolic resin. Due to the characteristic of heat curing of phenolic resin, only negative Pressure dehydration, heat tracing is required in the dehydration process, and the exhaust gas emission of fuel increases the greenhouse effect