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Deacidifying agent based on alkyl ketene dimer modified nano-magnesia and preparation method of deacidifying agent

A technology of alkyl ketene dimer and nano-magnesium oxide, which is applied in the post-treatment of waste paper, etc., can solve the problems of poor dispersion and achieve the effects of mild reaction conditions, cost reduction and high efficiency

Active Publication Date: 2019-10-11
HUBEI TAIDEANXIN INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the very small polarity of fluoroalkanes, the dispersion of magnesium hydroxide, magnesium oxide and other substances in them is extremely poor, so improving the dispersibility of deacidification substances in organic solvents is a key factor to improve the efficiency of deacidification agents

Method used

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  • Deacidifying agent based on alkyl ketene dimer modified nano-magnesia and preparation method of deacidifying agent
  • Deacidifying agent based on alkyl ketene dimer modified nano-magnesia and preparation method of deacidifying agent
  • Deacidifying agent based on alkyl ketene dimer modified nano-magnesia and preparation method of deacidifying agent

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Heat 2g of alkyl ketene dimer to 110°C to melt completely, then add 1.5g of nano-magnesium oxide and stir at this temperature for 30min. After the reaction is completed, filter with suction, wash the filter cake repeatedly with a total of about 100 mL of hot ethanol at a temperature of 75°C, and finally dry the filter cake in a vacuum at 35°C for 24 hours to obtain modified nano-magnesium oxide.

[0023] 800g of perfluoroheptane and 16g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 1.5g of dried modified nano-magnesium oxide into the mixed solvent, transfer the obtained mixture to a homogenizer, homogenize it for 8 minutes under the condition of 8000r / min, and then sonicate it for 30 minutes, which is the deacidification agent.

Embodiment 2

[0025] Heat 2.5g of alkyl ketene dimer to 110°C to make it melt completely, then add 2.5g of nano-magnesium oxide and stir at this temperature for 30min. After the reaction is completed, filter with suction, wash the filter cake repeatedly with a total of about 120 mL of hot ethanol at a temperature of 75°C, and finally dry the filter cake in a vacuum at 35°C for 24 hours to obtain modified nano-magnesium oxide.

[0026] 1615g of perfluoroheptane and 35g of petroleum ether were mixed and stirred uniformly to obtain a mixed solvent. Add 2.5g of dried modified nano magnesium oxide into the mixed solvent, transfer the resulting mixture to a homogenizer, homogenize it at 8000r / min for 8min, and then sonicate it for 30min to obtain a deacidifying agent.

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Abstract

The invention relates to a deacidifying agent based on alkyl ketene dimer modified nano-magnesia and a preparation method of the deacidifying agent. Firstly, nano-magnesia is added into a molten alkylketene dimer and modified, and secondly, the modified nano-magnesia is dispersed in perfluoroheptane and petroleum ether mixed solvents to obtain the target deacidifying agent. According to the deacidifying agent, raw materials are easily obtained, reaction conditions are mild, the preparation and use method is simple and convenient, and the deacidifying agent is less in dosage, high in efficiency and good and uniform in deacidifying effect.

Description

technical field [0001] The invention relates to the technical field of book file processing and chemical composition, in particular to a paper deacidifier based on alkyl ketene dimer modified nano magnesium oxide and a preparation method thereof. Background technique [0002] At present, there are tens of thousands of precious books, calligraphy and paintings, newspapers, archives and other cultural heritage preserved in various libraries, museums, and archives in my country, most of which are written and printed by handmade paper or mechanical paper. to make. With the passage of time, paper documents will gradually appear yellowing, mildew, pulverization and chipping, which are mainly caused by the acidification of paper. The deterioration of paper materials is manifested as discoloration macroscopically, and the structure is broken (decreased mechanical strength) microscopically. [0003] Cellulose is the main component of paper. It is quite stable under neutral and weakl...

Claims

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Application Information

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IPC IPC(8): D21H25/18
CPCD21H25/18
Inventor 张涛
Owner HUBEI TAIDEANXIN INFORMATION TECH CO LTD
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