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Deinking agent and deinking agent composition

A deinking agent and compound technology, which is applied in the field of deinking agent and deinking agent composition, can solve the problems of poor deinking effect, color tone and taste deterioration, and achieve good operability, low flammability, and high brightness Effect

Inactive Publication Date: 2008-04-09
LION CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on storage conditions, hydrolysis reactions can occur, resulting in deterioration in color tone and taste, and in some cases, poorer deinking effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5 and comparative example 1-3

[0066] Using the deinking agents shown in Table 1, biodegradability tests and various deinking performance evaluations can be performed. The evaluation method is as follows:

[0067] (1) Biodegradability test

[0068] According to the MITI test method (OECE test guideline 301C), the biodegradability test was carried out under the following conditions:

[0069] (Test Conditions)

[0070] Sample concentration: 30-100ppm

[0071] Activated sludge concentration: 30-100ppm

[0072] Test temperature: 25°C

[0073] Test period: 28 days

[0074] (evaluate)

[0075] After many days of measuring BOD (biochemical oxygen demand), and use BOD value and TOD value (total oxygen demand) according to the following formula to calculate the degree of biodegradation. The results are shown in Table 2.

[0076] Biodegradation (%)=100×(BOD / TOD)

[0077] ○: The degree of biodegradation is equal to or greater than 60%

[0078] △: The degree of biodegradation is equal to or greater than 40% a...

Embodiment 6-14

[0099] The deinking agent (90 parts by weight) shown in Table 3 was separately mixed with equal parts of water (10 parts by weight) to prepare a deinking agent composition with a pH value of 7.

[0100] For each deinking agent composition obtained in this way, in addition to the weight of the waste paper raw material, the concentration of the deinking agent composition added in the waste paper raw material is 0.3wt%, according to a method similar to Example 1 The deinking performance was evaluated. The results are shown in Table 4.

[0101] table 3

[0102] Deinking agent

Example 6

C 17 h 33 COO(10EO)CH 3

Example 7

C 17 h 33 COO(12EO / 2PO)CH 3

Example 8

C 17 h 33 COO(12EO)CH 3

Example 9

C 17 h 33 COO(12EO / 2PO)C 2 h 5

Example 10

C 17 h 33 COO(10EO / 2PO)H

Example 11

C 17 h 33 COO(15EO)CH 3

Example 12

C 21 h 43 COO(8EO / 3PO)H

Example 13

Palm o...

Embodiment 15-21 and comparative example 4-6

[0107] The deinking agents shown in Table 5 were separately mixed with equal parts of water to prepare a deinking agent composition with a pH value of 7.

[0108] For each of the deinking agent compositions thus obtained, the stability after being maintained at pH 7 at 5°C for 1 month was confirmed, and evaluated according to the following criteria. The results are shown in Table 5.

[0109] ◯: Remains as a homogeneous solution at 5°C and exhibits fluidity.

[0110] Δ: Partially precipitated and solidified at 5°C.

[0111] ×: Completely cured at 5°C, or gelled at room temperature.

[0112] table 5

[0113] Deinking agent

[0114] As shown in Table 5, when the ratio of deinking agent / water in Examples 15-21 is within the range given by the present invention, compared with the compositions of Comparative Examples, they exhibit much superior stability after many days.

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PUM

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Abstract

A deinking agent which comprises a compound having a C7-23 aliphatic hydrocarbon group, an oxyethylene group, and an oxypropylene group and / or oxybutylene group and having a degree of biodegradation of 60% or higher and an average molecular weight of 1,500 or lower. This deinking agent has satisfactory biodegradability and is reduced in the burden to be imposed on the environment. It provides satisfactory handleability because a moderate froth amount is maintained during the treatment. With the deinking agent, a high-quality regenerated pulp having a high whiteness and a low residual ink content can be obtained.

Description

technical field [0001] The present invention relates to a deinking agent and a deinking agent composition, in particular to a deinking agent and a deinking agent composition suitable for obtaining recycled pulp from printed waste paper such as newsprint and magazines. Background technique [0002] Printed waste paper such as newsprint and magazines has been used for many years for recycled pulp and reused as raw material for papermaking. In recent years, recycling of printed waste paper has become more important from the viewpoint of effective utilization of natural resources and protection of the environment, and the field of application of recycled pulp has expanded. [0003] When recycling printed waste paper, these waste papers are usually treated by mixing with the addition of alkaline agents such as caustic soda, sodium carbonate or sodium silicate, the addition of bleaching agents such as hydrogen peroxide or sodium hypochlorite, and the addition of chelating agents ...

Claims

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Application Information

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IPC IPC(8): D21C5/02
CPCD21C5/027Y02W30/64
Inventor 角井寿雄吉田浩介山崎敦金谷昭范坂井哲也竹居光彦
Owner LION CORP