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Deinking agent and synthesis method thereof

A synthesis method and technology of deinking agent, applied in the field of papermaking auxiliaries, can solve the problems of difficulty in capturing fine particles of water-based ink, influence of whiteness of deinked pulp, influence of deinking efficiency, etc., and achieve strong anti-ink redeposition ability. , The effect of good ink capture performance and low ink residue

Active Publication Date: 2017-01-04
威尔(福建)生物有限公司
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Problems solved by technology

A large number of reports believe that in the conventional alkaline deinking process, hydrophilic water-based inks bring great difficulties to waste paper deinking, the main reason is that the ink particles peeled off from the fibers are very small and have a certain degree of hydrophilicity. property, which seriously affects the deinking efficiency
The current mainstream deinking agent is a compound product of anionic and nonionic surfactants. In the process of deinking waste paper sprayed with water-based ink, it is difficult to capture the fine particles of water-based ink, and the deinking pulp Whiteness is severely affected

Method used

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  • Deinking agent and synthesis method thereof
  • Deinking agent and synthesis method thereof
  • Deinking agent and synthesis method thereof

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preparation example Construction

[0023] Concrete, the synthetic method of deinking agent provided by the invention, comprises the following steps:

[0024] (1) Synthesis of enol polyether: Add the initiator unsaturated fatty alcohol into the reaction kettle, add the catalyst potassium hydroxide at the same time, start stirring, heat up to 80-120°C, and remove The weight ratio of moisture to moisture is less than 0.3%, then heat up to 150-170°C, add ethylene oxide, after adding, keep it at 135-165°C for 25-40min, then add propylene oxide, after the reaction is completed, it will be heated at 135-165°C Heat preservation and aging at 165°C for 30-45 minutes to obtain unsaturated enol polyether.

[0025] (2) Synthesis of unsaturated gemini-type quaternary ammonium salt: put dimethylaminoethanol and maleic anhydride into the reaction kettle, add a small amount of catalyst p-toluenesulfonic acid, react at 110-135°C for 2-6 hours, and remove in vacuum The generated moisture yields dimethylaminoethanol maleate. Adj...

Embodiment 1

[0043] 1. Add 10mol of the starter 2-propen-1-ol into the reaction kettle, add 50g of potassium hydroxide catalyst at the same time, start stirring, raise the temperature to about 100°C and vacuumize to about 0.1Mpa, remove the water until the weight ratio of the water is less than 0.1%, then raise the temperature to 160°C, slowly add 200mol of ethylene oxide in batches (about 10mol per batch, weight about 440g), heat and mature for 30min after adding, and then add in batches (about 10mol per batch, weight about 440g) 580g) and 150mol propylene oxide, after the reaction is completed, heat-preserve and mature at 160±5°C for 35min, cool down to below 80°C and adjust the pH to 6-7 with phosphoric acid to obtain prenol polyether.

[0044] 2. Put 20 mol of dimethylaminoethanol and 10 mol of maleic anhydride into the reaction kettle, add 0.01 mol of catalyst p-toluenesulfonic acid, raise the temperature to 125°C, and remove the water generated by the reaction. After reacting for 4 h...

Embodiment 2

[0049] 1. Add 10mol of the starter 9-octadecen-1-ol into the reaction kettle, add 55g of potassium hydroxide catalyst at the same time, start stirring, raise the temperature to 120°C and vacuumize to about 0.1Mpa, remove the water until the weight ratio of the water is less than 0.1%, slowly add 300mol ethylene oxide in batches (about 10mol per batch, about 440g), and after the addition is completed, heat and mature at 140±5°C for 25min, and then add 80mol ethylene oxide in batches (about 10mol per batch, about 580g) Propylene oxide, after the reaction is completed, heat-preserve at 140±5°C for 30 minutes, cool down to 85°C and adjust the pH to 6-7 with phosphoric acid to obtain allyl alcohol polyether.

[0050] 2. Add allyl alcohol polyether and coconut oil prepared in step 1 into the reaction kettle at a molar ratio of 1:0.8 to 1.0, add 0.3mol of p-toluenesulfonic acid as a catalyst, and add 15mol of toluene solvent at the same time , stirring and raising the temperature to ...

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Abstract

The invention relates to a deinking agent and a synthesis method thereof. The deinking agent contains gemini amphoteric polyether, wherein the gemini type amphoteric polyether contains unsaturated gemini type quaternary ammonium salt, a polyether segment and fatty acid. It is ensured that the deinking agent has good permeability by changing different combinations of EO and PO in the gemini amphoteric polyether and the proportion of the unsaturated fatty acid, the unsaturated polyether and the unsaturated gemini type quaternary ammonium salt, bubbles are easy to control in the flotation process, the service life of the bubbles is moderate, the capture ability of ink is strong, oil-resistant ink deposits again, the dirt count is reduced, and the full pulp whiteness of waste paper is improved.

Description

technical field [0001] The invention relates to a papermaking auxiliary agent, in particular to a deinking agent and a synthesis method thereof. Background technique [0002] Waste paper is an important renewable resource and an important raw material for my country's paper industry. The repeated recycling of waste paper and the repeated invasion of fiber cells by inks and dyes have caused a serious decline in the quality of waste paper. With the advancement of science and technology, more and more environmentally friendly water-based inks are used in paper products. A large number of reports believe that in the conventional alkaline deinking process, hydrophilic water-based inks bring great difficulties to waste paper deinking, the main reason is that the ink particles peeled off from the fibers are very small and have a certain degree of hydrophilicity. property, which seriously affects the deinking efficiency. The current mainstream deinking agent is a compound product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04C08F283/06C08F220/06C08F222/22C08F220/64C08G65/26
CPCC08F283/065C08G65/2609C08G65/2648C09D9/04C08F220/06C08F222/22C08F220/64
Inventor 齐文刚邱元进许荣根曾祥庚许贤
Owner 威尔(福建)生物有限公司
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