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Surfactant for wastepaper deinking, and preparation method thereof

A surfactant and waste paper deinking technology, which is applied in chemical paint/ink remover, processed waste paper, papermaking, etc., can solve problems such as residues and affecting pulp deinking effect, and achieve good deinking effect

Active Publication Date: 2015-02-25
ANHUI LEVEKING BIOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surfactant in the deinking agent plays the role of wetting, penetrating, emulsifying and dispersing the fiber and ink, but the surfactant in the existing deinking agent is difficult to capture the ink particles with a small particle size, so that a large number of particles Ink particles with very small diameters remain in the pulp, seriously affecting the deinking effect of the pulp

Method used

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  • Surfactant for wastepaper deinking, and preparation method thereof
  • Surfactant for wastepaper deinking, and preparation method thereof
  • Surfactant for wastepaper deinking, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a 1000-liter reactor, add 932 kilograms of octanol polyoxyethylene ether (fatty alcohol polyoxyethylene ether, R=8, n=20), 68 kilograms of phthalic anhydride in sequence, and at a temperature of 105° C. Stir at a stirring speed of 150 rpm for 60 minutes to make it evenly mixed; then add 3 kg of p-toluenesulfonic acid and stir for 10 minutes at a stirring speed of 150 rpm, p-toluenesulfonic acid catalyzes octanol polyoxygen Esterification reaction of vinyl ether (fatty alcohol polyoxyethylene ether, R=8, n=20) and phthalic anhydride; vacuumize, while raising the temperature to 180°C, and stirring at a stirring speed of 150 rpm for 6 hour; finally cooled to room temperature and left to stand to obtain the surfactant, which was a colorless liquid.

Embodiment 2

[0023] In a 1000-liter reactor, add 984 kilograms of lauryl alcohol polyoxyethylene ether (fatty alcohol polyoxyethylene ether, R=12, n=100), 16 kilograms of phthalic anhydride in sequence, at a temperature of 105 ° C Down, stir 60 minutes with the stirring speed of 120 revs / min, make it mix evenly; Add 1.5 kilograms of benzenesulfonic acid again, stir 10 minutes with the stirring speed of 120 revs / min, benzenesulfonic acid catalyzes octanol polyoxyethylene ether ( Esterification reaction of fatty alcohol polyoxyethylene ether, R=12, n=100) and phthalic anhydride; vacuumize, heat up to 180°C simultaneously, and stir for 6 hours at a stirring speed of 120 rpm; finally Cool to room temperature and stand still to obtain the surfactant, which is in the form of light yellow solid.

Embodiment 3

[0025] In a 1000-liter reactor, add 990 kilograms of lauryl alcohol polyoxyethylene ether (fatty alcohol polyoxyethylene ether, R=12, n=150), 10 kilograms of phthalic anhydride in sequence, at a temperature of 105 ° C Next, stir at a stirring speed of 150 rpm for 60 minutes to make it evenly mixed; then add 1 kg of sulfamic acid and stir for 10 minutes at a stirring speed of 150 rpm. Esterification reaction of vinyl ether (fatty alcohol polyoxyethylene ether, R=12, n=150) and phthalic anhydride; vacuumize, while raising the temperature to 180°C, and stirring at a stirring speed of 150 rpm for 6 hour; finally cooled to room temperature and left to stand to obtain the surfactant, which was in the form of a pale yellow solid.

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Abstract

The invention discloses a surfactant for wastepaper deinking, and a preparation method thereof. The surfactant is non-ionic surfactant and has a compound with a structure shown as a formula (1). The preparation method comprises the steps of adding 93.2-99.2 parts by weight of fatty alcohol-polyoxyethylene ether and 0.8-6.8 parts by weight of phthalic anhydride in a reaction kettle; stirring for at least 30 minutes at a temperature higher than or equal to 60 DEG C and at a stirring speed of 100-150 rounds per minute; adding 0.03-3% of a catalyst based on a total amount of the fatty alcohol-polyoxyethylene ether and the phthalic anhydride; stirring for at least 2 minutes at the stirring speed of 100-150 rounds per minute; stirring for at least 6 hours in a vacuum state at a temperature higher than or equal to 180 DEG C and at the stirring speed of 100-150 rounds per minute; and cooling to a room temperature to obtain the surfactant. The surfactant provided by the invention can capture ink particles with extremely small particle size in a paper pulp, and has a good deinking effect.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a surfactant used for deinking waste paper and a preparation method thereof. Background technique [0002] Waste paper deinking technology is an important link in the papermaking process of waste paper. Deinking agent is an indispensable and important raw material. Its deinking effect not only determines the final performance of paper, but also determines the contribution to low carbon, environmental protection and energy saving. degree. Deinking agents include chemical deinking agents and biological enzyme deinking agents. Compared with chemical deinking agents, biological enzyme deinking agents have the characteristics of high efficiency, rapidity, energy saving and environmental protection. Chinese invention patent ZL200410052468.1 discloses a new lipase waste paper deinking process, mainly lipase, combined with one or more of cellulase, xylanase, amylase and pectinase, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D9/04D21C5/02C08G65/00
CPCY02W30/64
Inventor 郭宏涛王剑英张清辉胡关键赖广才
Owner ANHUI LEVEKING BIOTECH CO LTD