Preparation method and use method of modified bentonite environment-friendly formaldehyde removing agent

A technology of bentonite and aldehyde scavenger, used in chemical instruments and methods, aldehyde/ketone condensation polymer adhesives, adhesives, etc., can solve problems such as unsatisfactory physical and chemical properties, and achieve low production cost, simple process, formaldehyde The effect of low release rate

Active Publication Date: 2013-04-03
吕新民
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural bentonite is generally calcium-based bentonite, and its physical and chemical properties are not very ideal. It cannot achieve satisfactory results when applied to the removal of free formaldehyde in urea-formaldehyde. Aldehyde field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the examples, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0024] The preparation method of the modified bentonite environment-friendly aldehyde-removing agent described in the present embodiment is carried out according to the following steps:

[0025] a. Sodiumization of raw materials: According to the weight ratio of calcium bentonite: sodium carbonate = 100:3, weigh calcium bentonite and sodium carbonate respectively, crush the calcium bentonite and pass through a 200-mesh sieve, then add sodium carbonate and mix evenly. Spread the mixture in a dry place, spray 10% of the calcareous bentonite water on the surface of the mixture, mix well, seal it in a sealed tank for 24 hours for sodium reaction, and then air dry naturally.

[0026] b. Mechanical stirring: in par...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a modified bentonite environment-friendly formaldehyde removing agent for removing free formaldehyde in urea-formaldehyde glue. A preparation method of the formaldehyde removing agent comprises the following steps of: in parts by weight, crushing 100 parts of calcium bentonite, screening the crushed calcium bentonite through a 200-mesh sieve, adding 2 to 3.5 parts of sodium carbonate into the screened calcium bentonite, mixing uniformly, spraying water of which the weight accounts for 10 percent of that of the calcium bentonite, fully mixing uniformly, sealing the mixture for 24 hours for sodication reaction, and air-drying naturally; and adding 0.5 to 2.5 parts of hydroxyethyl cellulose, 1.5 to 2.5 parts of ammonia chloride and 2.5 to 5 parts of sodium nitrite into 100 parts of a raw material subjected to sodication, crushing the mixture and stirring for 3 hours to obtain powder, and screening the powder through a 300-mesh sieve to obtain formaldehyde removing powder. A use method of the modified bentonite environment-friendly formaldehyde removing agent comprises the following steps of: in parts by weight, adding 10 parts of water into 10 parts of the formaldehyde removing agent, stirring at a high speed for 40 minutes, adding 10 parts of a suspension of the mixture into 90 parts of the urea-formaldehyde glue, raising the temperature to 50 DEG C, fully stirring for 30 minutes, standing for more than 24 hours, and thus fully adsorbing the formaldehyde in the urea-formaldehyde glue. The modified bentonite environment-friendly formaldehyde removing agent has good adsorption effect on the formaldehyde, and cannot influence the performance of the urea-formaldehyde glue.

Description

technical field [0001] The invention relates to an aldehyde remover for removing free formaldehyde in urea-formaldehyde glue, in particular to a method for preparing and using a modified bentonite environment-friendly aldehyde remover. Background technique [0002] Urea-formaldehyde glue is a low-cost and widely used adhesive, mainly used in the production of wood-based panels. However, the existing urea-formaldehyde glue generally has the disadvantage of high free formaldehyde content, and urea-formaldehyde glue with high free formaldehyde content is the main source of indoor pollution. At present, there are two forms of formaldehyde elimination methods, one is chemical elimination method, and the other is physical elimination method. The chemical elimination method uses various formaldehyde capture agents to destroy the molecular structure of formaldehyde, benzene and other harmful gases, and then gradually removes them, and finally achieves the purpose of removing formal...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01D15/02C09J161/24
Inventor 吕新民杜蛟
Owner 吕新民
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products