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LIP type nonionic surfactant, preparation method and applications thereof

A non-ionic surface and active agent technology, applied in the direction of chemical paint/ink remover, coating, etc., to achieve the effect of good appearance, strong capture and emulsification ability, and high whiteness

Active Publication Date: 2015-12-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few studies on polymer deinking agents at present.

Method used

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  • LIP type nonionic surfactant, preparation method and applications thereof
  • LIP type nonionic surfactant, preparation method and applications thereof
  • LIP type nonionic surfactant, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) First add 2mol of isophorone diisocyanate (IPDI) into the reactor, and heat to 50°C at a stirring speed of 200r / min;

[0040] 2) Then slowly add 1 mol of lauric acid diethanolamide (LDEA) into the reactor at a drop rate of 6d / min at a stirring speed of 400r / min, and add 10mL of chloroform for viscosity reduction, and continue to Stir and keep warm for 60 minutes;

[0041] 3) Add 2mol PEG-400 into the reactor quickly within 5s at a stirring speed of 200r / min, continue to react at a reaction temperature of 60°C for 90min until the end of the reaction, and then cool down to room temperature to obtain a LIP type nonionic Surfactant (n=9 in molecular formula).

[0042] The LIP type nonionic surfactant prepared in Example 1 is used alone as a deinking agent for waste paper deinking, and is denoted as LIP-1.

Embodiment 2

[0044] 1) First add 2mol of isophorone diisocyanate (IPDI) into the reactor, and heat to 55°C at a stirring speed of 250r / min;

[0045] 2) Then slowly add 1 mol of lauric acid diethanolamide (LDEA) into the reactor at a drop rate of 10d / min at a stirring speed of 450r / min, and add 12mL of chloroform for viscosity reduction, and continue to Stir and keep warm for 90min;

[0046] 3) Add 2mol PEG-600 into the reactor quickly within 20s at a stirring speed of 250r / min, continue the reaction at a reaction temperature of 70°C for 120min until the end of the reaction, and then lower it to room temperature to obtain a LIP type nonionic Surfactant.

[0047] The LIP type nonionic surfactant prepared in Example 2 is used alone as a deinking agent for waste paper deinking, and is denoted as LIP-2.

[0048] The molecular structural formula of LIP-2 is shown in formula (1),

[0049]

[0050] where n=13.

[0051] IR and 1 H-NMR analysis

[0052] 1. The infrared spectrum of LIP-2

...

Embodiment 3

[0057] 1) First add 2mol of isophorone diisocyanate (IPDI) into the reactor, and heat to 55°C at a stirring speed of 300r / min;

[0058] 2) Then at a stirring speed of 500r / min, slowly add 1 mol of lauric acid diethanolamide into the reactor at a dropping speed of 6d / min, and add 15mL of chloroform to reduce the viscosity, continue to stir and keep warm after the dropping Reaction 120min;

[0059] 3) Add 2mol PEG-600 into the reactor quickly within 5s at a stirring speed of 300r / min, continue the reaction at a reaction temperature of 90°C for 150min until the end of the reaction, and then lower it to room temperature to obtain a LIP-type nonionic Surfactant.

[0060] The LIP type nonionic surfactant prepared in Example 3 is used alone as a deinking agent for waste paper deinking, and is denoted as LIP-3.

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Abstract

The invention provides an LIP type nonionic surfactant, a preparation method and applications thereof. The chemical formula of the surfactant is represented in the description. The preparation method comprises the following steps: adding IPDI into a reactor, heating to a temperature of 50 to 70 DEG C under stirring, dropwise adding LDEA into the reactor under stirring, keeping on stirring, maintaining the temperature for 60 to 150 minutes to keep on carrying out reactions; then adding PEG under stirring, and keeping on performing reactions for 90 to 180 minutes at a temperature of 60 to 90 DEG C so as to obtain the LIP type nonionic surfactant. The preparation technology is simple, the raw materials are easily-available, and the reactions are easy to control. Compared with the micromolecular surfactant in the market, the prepared LIP type nonionic surfactant has a longer molecular chain and a stronger performance on dispersing, capturing, and washing printing ink; so the surfactant can be used as a deinking agent or be compounded to produce a deinking agent, which can be used to deink waste paper. The deinking effect is good, the regenerated paper has a high white degree, the residual ink is little, and thus the nonionic surfactant has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of waste paper deinking, relates to a surfactant that can be used for waste paper deinking, in particular to a LIP type nonionic surfactant and its preparation method and application. Background technique [0002] With the shortage of papermaking raw materials and increasingly stringent environmental protection requirements, secondary fiber has become an important source of fiber in the pulp and paper industry. The utilization of secondary fibers can save resources, reduce energy consumption, reduce environmental pollution, save costs, and obtain good economic and social benefits. Deinking of waste paper is an important way of secondary utilization of waste paper, and its key technology is the research and development of deinking agent. [0003] At present, most of the waste paper deinking agents used in China are low-molecular surfactants and their compound products, or products imported from abroad. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04C08G18/75C08G18/32C08G18/66C08G18/48
Inventor 张昌辉韩文会焦雅兰
Owner SHAANXI UNIV OF SCI & TECH
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