Method for decomposing waste urea-formaldehyde resin adhesive

A technology of urea-formaldehyde resin glue and stearic acid, which is applied in chemical instruments and methods, recycling technology, chemical/physical/physicochemical processes, etc., can solve problems such as polluting the environment and difficulty in decomposing waste urea-formaldehyde resin glue, and achieve increased benefits , reduce waste and reduce labor intensity

Active Publication Date: 2020-11-17
SICHUAN HUAXIANG FOREST PROD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that in the process of making and using the existing urea-formaldehyde resin glue, it is easy to cause a large amount of solidified waste urea-formaldehyde resin glue, and the solidified waste urea-formaldehyde resin glue It is difficult to decompose, and discarding the solidified waste urea-formaldehyde resin everywhere will cause environmental pollution. The purpose is to provide a method for decomposing waste urea-formaldehyde resin, which solves the problem that the solidified waste urea-formaldehyde resin is difficult to decompose. Discarding resin glue everywhere will cause environmental pollution

Method used

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  • Method for decomposing waste urea-formaldehyde resin adhesive

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Effect test

Embodiment 1

[0026]A method for decomposing waste urea-formaldehyde resin glue of the present invention includes a treatment agent, the treatment agent includes the following components: acidifying agent, softening agent, penetrating agent, and the acidifying agent includes hexamethylene diamine, ammonium chloride, hexamethylene tetra One or two of amines, the softener includes stearic acid, the penetrant includes one or two of penetrant BX and penetrant T, and the mass fraction ratio of the following components is included: the acidifying agent is 55-65% , The softener is 10-25%, and the penetrating agent is 20-25%.

[0027] The specific implementation of the present invention is as follows: in the production process of the existing urea-formaldehyde resin glue, a large amount of waste urea-formaldehyde resin glue will be produced, and the waste urea-formaldehyde resin glue cannot be put into production and use, but the waste urea-formaldehyde resin glue cannot be directly discharged direc...

Embodiment 2

[0029] Based on embodiment 1, the present invention is a kind of method for decomposing waste urea-formaldehyde resin glue, and the specific realization mode of the present invention is: comprise reactor, and waste urea-formaldehyde resin glue is solidified in reactor, and formaldehyde solution is put into reactor and soaked Waste urea-formaldehyde resin glue, soaking time is 6-8 hours; after soaking, pour the treatment agent into the reaction kettle, the amount of treatment agent is 1-2 packs; then heat the reaction kettle at 70-85°C until the reaction After the reaction in the kettle is completed, no bubbles are generated, and then the temperature is lowered to below 45°C, and then the decomposed product is discharged from the reactor by opening the discharge port of the reactor. The preferred formaldehyde percentage is 37%, and then through the set Formaldehyde is convenient for soaking waste urea-formaldehyde resin glue, and then makes waste urea-formaldehyde resin glue eas...

Embodiment 3

[0031] Based on the above embodiments, the present invention provides a method for decomposing waste urea-formaldehyde resin glue. The specific implementation of the present invention is: comprising a stirring device, adding formaldehyde solution into the stirring device, stirring the formaldehyde solution by starting the stirring device, and then solidifying The waste urea-formaldehyde resin glue is put into the stirring device for soaking, and the soaking time is 6-8 hours; after soaking, the treatment agent is poured into the stirring device, and the amount of the treatment agent is 1-2 packs; then the stirring device is heated up, and the temperature 70-85°C, until no bubbles are generated after the reaction in the stirring device is completed, then lower the temperature to below 45°C, and then discharge the decomposed product from the stirring device by opening the discharge port of the stirring device. The preferred percentage of formaldehyde It is 37%, and then the forma...

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Abstract

The invention discloses a method for decomposing a waste urea-formaldehyde resin adhesive. A treating agent is used in the method. The treating agent comprises the following components: an acidifyingagent, a softening agent and a penetrating agent, wherein the acidifying agent comprises one or two selected from hexanediamine, ammonium chloride and hexamethylenetetramine, the softening agent comprises stearic acid, and the penetrating agent comprises one or two selected from a penetrating agent BX and a penetrating agent T. Specifically, the treating agent comprises the following components inpercentage by mass: 55-65% of the acidifying agent, 10-25% of the softening agent and 20-25% of the penetrating agent. A product obtained after the treating agent decomposes the waste urea-formaldehyde resin adhesive can still be used for preparing the component of the urea-formaldehyde resin adhesive again, so benefits are increased, the waste of the decomposed product is reduced, and the problems that the solidified waste urea-formaldehyde resin adhesive is difficult to decompose and environmental pollution is caused by discarding of the solidified waste urea-formaldehyde resin adhesive everywhere are solved.

Description

technical field [0001] The invention relates to a method, in particular to a method for decomposing waste urea-formaldehyde resin glue. Background technique [0002] A large amount of waste urea-formaldehyde resin will be produced in the production process of the existing urea-formaldehyde resin glue. The waste urea-formaldehyde resin glue cannot be put into production and use, but the waste urea-formaldehyde resin glue cannot be discharged directly, and then the waste urea-formaldehyde resin glue can be put into the reaction In the kettle, but the waste urea-formaldehyde resin glue is easy to solidify after being placed for a period of time, making it difficult to decompose the solidified waste urea-formaldehyde resin glue. After being placed for a period of time, the urea-formaldehyde resin glue will solidify, and the urea-formaldehyde resin glue will be discarded. Glue is difficult to break down. Contents of the invention [0003] The technical problem to be solved by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/28C08J11/26C08J11/16B01J19/18C08L61/24
CPCC08J11/28C08J11/26C08J11/16B01J19/18B01J19/0053B01J19/0066C08J2361/24Y02W30/62
Inventor 崔亮唐亚彬
Owner SICHUAN HUAXIANG FOREST PROD IND
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