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Polyether surfactant as deinking agent of waste paper and its preparation method

A surfactant and waste paper deinking technology, applied in chemical instruments and methods, fat/resin/pitch/wax removal of pulp, washing/replacing pulp treatment liquid, etc., can solve the problem of high price and achieve enhanced compatibility , Efficient and environmentally friendly recycling, good deinking effect

Inactive Publication Date: 2007-08-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the high-efficiency and low-pollution deinking agents in China rely on imports. Although imported deinking agents have excellent effects, their prices are relatively high. Therefore, the localization of high-end deinking agents has become a very important research topic in recent years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Add propylene oxide and the initiator monofunctional fatty alcohol into the reactor according to the ratio of 4:0.5 (mass ratio), and add 0.01 alkali at the same time;

[0024] 2) vacuumize the inside of the reactor, and carry out the polymerization reaction at 100°C;

[0025] 3) After the first step reaction is completed, the reactor is evacuated again, and 3 parts (mass ratio) of ethylene oxide are added, and the polymerization reaction is carried out at 70° C.;

[0026] 4) After the second step reaction is completed, the product is taken out, and neutralized with acetic acid at 30°C until neutral;

[0027] 5) The product is proportional, 0.3% polyether and 1% NaOH; 2% NaSiO 3 ; 1% of 30% concentration of H 2 o 2 (vs. dry pulp), deinking is performed.

Embodiment 2

[0029] 1) Add propylene oxide and initiator monofunctional aliphatic alcohol to the reactor according to the ratio of 2:0.5 (mass ratio), and add 0.005 alkali initiator at the same time;

[0030] 2) vacuumize the inside of the reactor, and carry out the polymerization reaction at 100°C;

[0031] 3) After the first step reaction is completed, the reactor is evacuated again, and 6 parts (mass ratio) of ethylene oxide are added, and the polymerization reaction is carried out at 70° C.;

[0032] 4) After the second step reaction is completed, the product is taken out, and neutralized with acetic acid at 30°C until neutral;

[0033] 5) The above products, according to the ratio of 0.3% and 1% NaOH; 2% NaSiO 3 ;1% of 30%H 2 o 2 (vs. dry pulp), deinking is performed.

Embodiment 3

[0035] 1) Add propylene oxide and initiator monofunctional aliphatic alcohol to the reactor according to the ratio of 2:0.5 (mass ratio), and add 0.005 alkali initiator at the same time;

[0036] 2) Vacuumize the inside of the reactor, and carry out the polymerization reaction at 110°C;

[0037] 3) After the first step reaction is completed, the reactor is evacuated again, and 7 parts (mass ratio) of ethylene oxide are added, and the polymerization reaction is carried out at 70° C.;

[0038] 4) After the second step reaction is completed, the product is taken out, and neutralized with acetic acid at 30°C until neutral;

[0039] 5) The above products, according to the ratio of 0.3% and 1% NaOH; 2% NaSiO 3 ;1% of 30%H 2 o 2 (vs. dry pulp), deinking is performed.

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PUM

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Abstract

The invention discloses a polyether surfactant as wastepaper deinking agent and preparation method. Its chemical structure general formula as follows: R-(PO)n-(EO)m, among it R group is fatty alcohol start agent, m and n represents the polymerization degree of EO and PO in macromolecules respectively, n ranges 8-26 and m ranged 4-35. Preparation method steps as follows: 1) adding 3-20 wt% epoxypropane and 1- 3 wt % start agent mono-functional aliphatic alcohol into autoclave, while adding 0.1-0.2 wt% initiator; 2) evacuating the reactor and reacting the first step polymerization reaction under 70 ~ 120 DEG C; 3) after completing the first step reaction, evacuating the reactor again, adding 4~30 wt% epoxyethane under 50 ~ 100 degree C and reacting the second polymerization reaction; 4) after completing the first step reaction, taking-up the final product and neutralizing with acid until neutral under 20 ~ 60 degree C. The invention process is simple, efficient and environment-friendly, and has good characteristics such as less use, wide range of application and good deinking results, etc.

Description

technical field [0001] The invention relates to a polyether surfactant used as a waste paper deinking agent and a preparation method thereof. Background technique [0002] With the enhancement of public awareness of environmental protection and the shortage of natural resources, recycling waste paper as secondary fiber can effectively protect forest resources, reduce environmental pollution, reduce papermaking costs and improve the international competitiveness of the papermaking industry. According to statistics, using waste paper as a renewable resource can save water by 50%, save energy by 60-70%, reduce air pollution by 60-70%, reduce biological oxygen consumption by 40%, and reduce suspended solids in sewage by 25%. Therefore, increasing the recycling and reuse ratio of waste paper is a key factor for the future development of the paper industry. [0003] my country is a country that is extremely short of wood fiber raw materials. The forest coverage rate is only 13.2%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/42D21C9/02D21C9/08C09K23/42
Inventor 李宝芳徐昱罗英武
Owner ZHEJIANG UNIV
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