Preparation method of thermoplastic phenolic resin with high solid content

Abstract

The invention relates to a preparation method of a thermoplastic phenolic resin with high solid content, which is technically characterized by comprising the following steps of: adding phenol in a three-neck flask; heating for a period of time; adding an acidic catalyst A to fully and evenly mix with phenol; adding formaldehyde B to the mixture at 65 DEG C in a mol percentage of 5:4; reacting for 1h; and then, reacting for 3h at 75-85 DEG C to obtain the resin, wherein the volatility of the resin is less than 15 percent at the temperature below 100 DEG C within 2h. The environment-friendly thermoplastic phenolic resin which is prepared from paraformaldehyde by a method of stably reacting to the end by controlling temperature by stages has solid content larger than 80 percent without dewatering sewage containing phenol and aldehyde, is environment-friendly, time-saving, energy-saving and economic.

Description

technical field [0001] The invention relates to a preparation method of a thermoplastic phenolic resin with high solid content, which belongs to the synthesis process in the industrial production process of the thermoplastic phenolic resin. Background technique [0002] The industrialized production of thermoplastic phenolic resin adopts 100 parts of phenol or phenols (100% of content), 26.5-27.5 parts of formaldehyde solution (100% of content), 0.056 parts of hydrochloric acid (100% of content) to synthesize the resin, and then It needs to be dehydrated and then crushed. In the production process, a large amount of phenol-containing wastewater will be produced due to excessive phenol. If it is discharged without treatment, it will cause serious pollution to the environment, and even endanger the survival of humans, animals and plants. There are three types of treatment technologies commonly used in the domestic industry, including physical and chemical methods, chemical me...

AI Technical Summary

Problems solved by technology

The chemical method is more suitable for the needs of industrial production, but this method either needs to put in substances that cause secondary pollution to polycondense with phenols, or cannot recycle the raw material phenol, which is a waste of resources for the environment and producers

Although the biochemical method has high treatment efficiency and is less affected by gas conditions, it occupies a large area and cannot recover raw phenol, so it can only be used in conjunction with secondary treatment to treat phenol-containing wastewater

In addition, some people have used simulation calculations to treat phenol-containing wastewater by heat pump rectification to recover phenol without introducing other substances to cause secondary pollution, but the direct steam heat energy consumed per ton of wastewater is also 26.9kJ

Others have found that manganese-potassium ore is almost completely oxidized and degraded to 100mg / L phenol in water under acidic conditions, but the reaction time is long and the process is complicated

Images