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Method for preparing paper tube adhesive through utilizing high-concentration printing, dyeing and desizing wastewater

A desizing wastewater, high-concentration technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problem of high operating costs, and achieve low cost, obvious social and environmental benefits, and good economic benefits. Effect

Active Publication Date: 2015-03-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Membrane method treats desizing wastewater, and the COD removal rate can reach 60-90%. For most printing and dyeing enterprises, it is still a headache

Method used

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  • Method for preparing paper tube adhesive through utilizing high-concentration printing, dyeing and desizing wastewater
  • Method for preparing paper tube adhesive through utilizing high-concentration printing, dyeing and desizing wastewater
  • Method for preparing paper tube adhesive through utilizing high-concentration printing, dyeing and desizing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Process flow chart of the present invention sees figure 1 ,Specific steps are as follows:

[0029] A. 1000ml of high-concentration desizing wastewater (embroidered cloth desizing wastewater from a printing and dyeing factory in Shaoxing), the measured PVA content is 3.80wt% (polymerization degree is 1700), pour it into a 2L three-necked flask, and add it to the wastewater 42.0 g of PVA raw materials with consistent PVA polymerization degree make the solution PVA content about 8.0wt%.

[0030] B. Add 260g kaolin and 9g defoamer (purchased from Nanjing Huaxing Defoamer Co., Ltd., model XPK-20, polysiloxane type defoamer), and add 1mol / L HCl solution to adjust the pH value of the solution to 2.0, and then heat the solution to 95°C and stir with a stirrer at a stirring speed of 100r / min, so that PVA, kaolin and other substances are completely dissolved.

[0031] C. After the PVA and kaolin are completely dissolved, adjust the heating device to control the temperature of t...

Embodiment 2

[0033] The reaction conditions are the same as in Example 1, except that the reaction time after C adds formaldehyde is 20min, and other operations and conditions are the same as in Example 1.

Embodiment 3

[0035] The reaction conditions are the same as in Example 1, except that the reaction time after C adds formaldehyde is 30min, and other operations and conditions are the same as in Example 1.

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Abstract

The invention provides a method for preparing a paper tube adhesive through utilizing high-concentration printing, dyeing and desizing wastewater. The method comprises the following steps: determining the PVA content in the high-concentration printing, dyeing and desizing wastewater, adding a proper amount of a PVA raw material into the wastewater according to the determined PVA content to make the PVA content in an obtained solution reach 7.0-10.0wt%, adding kaolin and an antifoaming agent, heating the above obtained solution under stirring to 85-95DEG C for completely dissolving the raw material, controlling the temperature in a range of 80-85DEG C, adding formaldehyde, reacting for a certain time, adding an aldehyde removing agent for a reaction, naturally cooling to 40DEG C, and discharging to obtain the paper tube adhesive. The method realizes the zero emission of desizing wastewater, realizes the waste recycle by utilizing the PVA raw material in the desizing wastewater to prepare the paper tube adhesive, can be widely used I the treatment of the high-concentration printing, dyeing and desizing wastewater, and has obvious social and environmental benefits; and compared with other paper tube adhesives, the paper tube adhesive prepared through the method has the advantages of decrease of the cost by about 30%, and good economic benefit.

Description

(1) Technical field [0001] The invention relates to a method for preparing paper tube glue by using high-concentration printing and dyeing desizing wastewater, which belongs to the resource utilization of PVA in high-concentration printing and dyeing and desizing wastewater. (2) Background technology [0002] Textile industrial wastewater mainly comes from the dyeing and finishing process, including desizing, scouring, bleaching, mercerizing, dyeing, printing and finishing. Desizing wastewater generally accounts for about 10-20% of the total wastewater. The wastewater is alkaline, with a pH value of about 12. The main component is polyvinyl alcohol (PVA) (polymerization degree between 1700-1750) slurry, while Due to different processes and different fabrics, the PVA content in desizing wastewater varies greatly. The PVA content is generally 1-3%, and the PVA content in high-concentration desizing wastewater can reach 4-5%. L, its COD load can account for 50% of the total am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/14C09J11/04C08F16/06C08F8/28
Inventor 王军良胡建军林春绵梅益柔
Owner ZHEJIANG UNIV OF TECH