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Silicon oil paper dissociation agent and dissociation process thereof

A technology of silicone oil paper and dissociating agent, which is applied in papermaking, paper recycling, waste paper processing, etc., to achieve the effect of simple process and reduced papermaking cost

Inactive Publication Date: 2011-07-06
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicone oil paper occupies a certain proportion of the waste paper recovered in the market, and there are some special silicone oil papers, which contain a certain amount of dry and wet strength agents. Decomposition process, because this kind of waste paper is difficult to wet, high strength, not easy to break into pulp, the yield of pulp is less than 10%, the traditional high-temperature cooking method is used for processing, because the fiber degradation is serious during the cooking process, the yield is average It is about 80%, and a large amount of waste liquid is produced, about 5m3 per ton of pulp, and the COD content is as high as 30000-50000mg / l, which brings serious pollution to the environment
[0003] The Chinese patent application with the patent application number 200810015583.X discloses a dry and wet strength paper dissociation agent, including 63-77% water, 23- 37% of surfactants and inorganic substances, this patent mainly relies on penetrants with strong swelling and penetrating effects to solve the problem of difficult wetting, and does not involve the dissociation of silicone oil paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Tween 60 0.05%,

[0030] Sodium dodecylbenzenesulfonate 0.1%,

[0031] The balance is water.

[0032] Example 2:

[0033] A kind of silicone oil paper dissociating agent, is made up of the raw material of following percentage by weight:

[0034] h 2 o 2 3%,

Embodiment 2

[0036] Tween 60 0.1%,

[0037] Sodium dodecylbenzenesulfonate 0.3%,

[0038] The balance is water.

[0039] Example 3:

[0040] The bottom paper of pharmaceutical labels on the market is silicone oil paper, which is a very good fiber raw material and has very good dry and wet strength. The bottom layer is mainly coated with PVA, and the main component of the top coat is silicone oil. It's hard to break it. Some factories adopt ball steaming method for treatment, but the pulp yield is low and a large amount of waste liquid is produced, which increases the cost of pulping and wastewater treatment.

[0041] This waste silicon oil paper adopts dissociating agent of the present invention to adopt following dissociation process to process,

Embodiment 3

[0043] (2) Dewater and wash the slurry with an oblique spiral. The dehydrated and washed slurry was diluted to a concentration of 3wt%, and then refined. The waste water obtained by dehydration and washing is put into the hydraulic pulper for reuse after the impurities are removed in the shallow air flotation tank.

[0044] Example 4:

[0045] The drug label bottom paper is treated with the following dissociation process using the dissociation agent of the present invention,

[0046] (1) Add water, drug label backing paper and the dissociating agent obtained in Example 2 into the hydropulper, the concentration of the drug label backing paper is 15wt%, and the amount of dissociating agent is 35kg / ton of drug label backing paper. Use steam to heat and soak at 80-95°C for 120 minutes to obtain slurry;

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PUM

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Abstract

The invention relates to the technical field of waste paper recycling, in particular to a silicon oil paper dissociation agent and a dissociation process thereof. The silicon oil paper dissociation agent consists of the following raw materials in percentage by weight: 1 to 3 percent of H2O2, 0.05 to 0.1 percent of fatty alcohol-polyoxyethylene ether, 0.05 to 0.1 percent of Tween 60, 0.1 to 0.3 percent of sodium dodecyl benzene sulfonate and the balance of water. The dissociation process comprises the following steps of: adding the water, silicon oil paper and the dissociation agent into an aquapulper, soaking at the temperature of between 80 and 95 DEG C for 60 to 120 minutes to obtain pulp, and dehydrating and washing the pulp, wherein the concentration of the silicon oil paper is 5 to 15 weight percent, and 12 to 35kg of dissociation agent is used for each ton of silicon oil paper. The silicon oil paper is treated by the dissociation agent and the process, the process is simple, waste water is not generated in the process, and the used chemical is clean and environmental-friendly; and the pulp can be used as an ingredient of high-grade paper such as toilet paper, coating base paper and the like, is used for replacing imported bleached softwood or hardwood pulp, and can greatly reduce papermaking cost.

Description

technical field [0001] The invention relates to the technical field of waste paper recycling, in particular to a dissociating agent for silicone oil paper, and also relates to a process for dissociating silicon oil paper using the dissociating agent. Background technique [0002] Waste paper is an important renewable resource, and its recycling has good economic and social benefits. Generally speaking, one ton of waste paper can produce 500-900 kg of paper, saving 2-4 cubic meters of wood. It is getting more and more attention from all walks of life. Silicone oil paper occupies a certain proportion of the waste paper recovered in the market, and there are some special silicone oil papers, which contain a certain amount of dry and wet strength agents. Decomposition process, because this kind of waste paper is difficult to wet, high strength, not easy to break into pulp, the yield of pulp is less than 10%, the traditional high-temperature cooking method is used for processi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/00D21C5/02
CPCY02W30/64
Inventor 吴朝军赵传山李书平于冬梅杨延昭朱青
Owner QILU UNIV OF TECH