CN103031017B - Neutral deinking agent for waste newspaper and waste book and periodical paper, preparation method and deinking method - Google Patents
Neutral deinking agent for waste newspaper and waste book and periodical paper, preparation method and deinking method Download PDFInfo
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Abstract
The invention discloses a neutral deinking agent for waste newspaper and waste book and periodical paper. The neutral deinking agent comprises the following components in certain parts by weight: sodium stearate, sodium dodecyl sulfate, alkyl polyoxyethylene ether, fatty alcohol-polyoxyethylene ether and water. A preparation method of the neutral deinking agent comprises the steps of weighing the components, adding the weighed water into a reaction kettle, adding sodium stearate, stirring until sodium stearate is completely dissolved, adding the other components, keeping on stirring, standing, cooling naturally, and obtaining the neutral deinking agent. A deinking method comprises the steps of cutting the waste newspaper and the waste book and periodical paper into pieces, mixing uniformly, putting in a container, adding the neutral deinking agent, diluting with hot water, and conducting heat preservation, breaking and floatation in sequence. With the adoption of the deinking agent for the waste newspaper and the waste book and periodical paper, the problems of high corrosivity and environmental pollution caused by an alkaline deinking agent used in the prior art are solved, and the deinking agent is good in deinking effect. The preparation method of the deinking agent is simple in technology, and easy to realize. The deinking method is good in deinking effect, environment- friendly, and energy-saving.
Description
Original bill application number: 201110231468.8
The original bill applying date: on August 12nd, 2011
Original bill denomination of invention: " old and useless newspaper-post consumer printing paper neutral deinking agent, preparation method and de-inking method "
Technical field
The invention belongs to discarded printing material cycling and reutilization technical field, be specifically related to a kind of old and useless newspaper-post consumer printing paper neutral deinking agent, also relate to the preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, and use the de-inking method of this old and useless newspaper-post consumer printing paper neutral deinking agent.
Background technology
Old and useless newspaper and post consumer printing paper are two kinds of main waste paper that domestic Deinking Pulp production line uses, the main wastepaper as raw material of the annual import of Ye Shi China.As 288.77 ten thousand tons of import waste newsprint in 2003 and post consumer printing papers, account for 31.31% of imported waste paper total amount then.According to Chinese papermaking association statistics, 2009,4,610,000 tons, China's consumer news paper, consumed 1,497 ten thousand tons of uncoated writing and printing papers.These paper are after printing and using, and major part becomes waste paper.As a rule, old and useless newspaper is highly suitable for the raw material of manufacturing paper with pulp as newsprint in reel again after deinking, is widely used in addition manufacture paper with pulp paper for daily use and general cultural paper.Post consumer printing paper mainly comprises that waste and old magazine, printing color do not contain or only contain the waste and old books and periodicals of a small amount of mechanical pulp etc., also be one of wastepaper as raw material that in Secondary Fiber Recycling, usage quantity is larger, this type of waste paper is after deinking is processed, remove color and ink, can be used as manufacturing paper with pulp of Corrugating Base Paper, glazed paper, cultural information paper using etc., also can produce cardboard and copy joining of newsprinting paper as producing.
In recent years, national paper pulp total quantity consumed is along with the growth of paper and production amount is increase trend.In paper pulp structure, non-wood pulp ratio continues to be obvious downtrending, and paper waste amplification strengthens, and is supporting the adjustment of paper pulp structure.2,305 ten thousand tons of China's paper waste consumptions in 2004, wherein 1,230 ten thousand tons of imported waste paper amounts; To 2009, national paper waste consumption reached 4,939 ten thousand tons, accounted for 62% of paper pulp total amount consumed, wherein 2,200 ten thousand tons, imported waste paper slurry.Obviously, waste paper resource by papermaking material structure from now in occupation of consequence more and more.Waste paper is as one of important source material of paper making pulps from now on, take correct measure improve its reclamation rate to current paper-making industry and environment protection all tool be of great significance.
1) can greatly save vegetable fibre resource, reduce the felling to forest, preserve the ecological environment.Often utilize one ton of paper pulp, be equivalent to save 3～5m
3timber, 1.2 tons of standard coals, 600 degree electricity, 100m
3water, 300Kg industrial chemicals, and reduce by 75% atmospheric pollution, 35% water pollutes, and saves 3m
3refuse landfill space, abroad waste paper is reclaimed and is referred to as " the 4th kind of forest " in city.
2) save investment, reduce costs.With waste paper pulp-making, 20%～30% of investment Zhi Xu same size factory.
3) alleviate environmental pollution.Use secondary stock and use compared with plant material, the pollution of environment is much smaller, the disposal of three wastes of paper waste is simultaneously easier than chemical pulp, completely can qualified discharge, therefore use waste paper to have great improvement to environmental protection of enterprise.
4) save energy, reduces energy consumption.Compare with chemical method, mechanical process and chemical-mechanical pulping, the waste paper pulp-making technological process of production is simpler, and energy consumption is lower.Produce 1 ton of pulp from ONP and save the energy of 75% left and right than producing 1 ton of ground wood pulp, produce 1 ton high whiteness Deinking Pulp and produce 1 ton of chemical pulp conserve energy more than 50%.
At present, China's deinking industry adopts alkaline deinking method mostly, adopt alkaline deinking agent, at a certain temperature by paper waste being carried out to the processes such as slaking, deinking, dispersion, size degradation, under alkalescence effect, pass through Action of Surfactant, by ink particle and fiber separation, and then to Deinking Pulp dilute, flotation, washing or flotation add the operations such as washing, finally obtains Deinking Pulp.Alkalescence deinking process comparative maturity, Deinking Efficiency is also higher, but alkaline deinking also exists shortcomings.One of them shortcoming is exactly that the strong basicity deinking wastewater COD forming after deinking is higher because this de-inking method carries out under strong basicity environment, and wastewater treatment difficulty is strengthened.If the not treated occurring in nature that is discharged into, will cause huge pollution to ecotope, seriously run counter to the scientific development idea such as " energy-saving and emission-reduction " and " environmental protection "; Moreover, because the strong basicity of deinking process also easily makes paper pulp occur " alkaline blackening " problem in deinking process, affect pulp brightness.
Summary of the invention
The object of this invention is to provide a kind of old and useless newspaper-post consumer printing paper neutral deinking agent, avoided prior art to use alkaline deinking agent and the corrodibility that produces is large, the problem of contaminate environment, and deinking efficiency is good.
Another object of the present invention is that the preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent is provided.
The present invention also provides the de-inking method that uses this old and useless newspaper-post consumer printing paper neutral deinking agent.
The first technical scheme of the present invention is, a kind of old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water.
The second technical scheme of the present invention is that a kind of preparation method of old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take following component: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 60 DEG C～75 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min ± 10; Stirring velocity is down to 50r/min ± 10, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 30min～50min, leave standstill, naturally cooling, to obtain final product.
The 3rd technical scheme of the present invention is that a kind of de-inking method that uses old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into fragment, after evenly mixing, put into container;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 0.5%～1.5% described in step 1, it is 8%～10% that heating water is diluted to pulp density,
Wherein, described old and useless newspaper-post consumer printing paper neutral deinking agent is according to parts by weight, composed of the following components: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water;
Step 3, container is placed in to thermostat water bath, at the temperature of 45 DEG C～60 DEG C, insulation 30min～45min, take out, being diluted with water to pulp density is 5%～6%, uses slurry disintegrator size degradation, it is 0.6%～1.2% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
In step 1, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3.
In step 2, the hot water temperature that uses is 50 DEG C ± 2.
In step 3, the size degradation time is 30s～60s, and flotation time is 5min～8min.
The beneficial effect of old and useless newspaper-post consumer printing paper neutral deinking agent of the present invention is: avoided in conventional alkaline deinking process, because of problems such as the deinking wastewater alkalescence strong (pH value is in 12 left and right conventionally), the corrodibility that use strong basicity pharmaceutical chemicals to cause as sodium hydroxide etc. are large, big for environment pollution.Meanwhile, also greatly reduce the intractability of deinking wastewater, all have very important realistic meaning in the field such as energy-saving and emission-reduction and environmental protection.This old and useless newspaper-post consumer printing paper neutral deinking agent is widely used in the deinking of old and useless newspaper-post consumer printing paper, is particularly useful for ink setting mode and mainly relies on the deinking of permeating dry waste and old papery class printed matter.
The preparation method of old and useless newspaper-post consumer printing paper neutral deinking agent of the present invention, technique is simple, easily realizes.
The present invention uses the de-inking method of old and useless newspaper-post consumer printing paper neutral deinking agent, and deinking efficiency is good, environmental protection and energy saving, and deinking wastewater pollution load is low.
Embodiment
Old and useless newspaper-post consumer printing paper neutral deinking agent of the present invention, according to parts by weight, composed of the following components: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water.
Wherein, sodium lauryl sulphate belongs to anion surfactant, soluble in water, compatibleness is good again with negatively charged ion, nonionic, there is good emulsifying, foaming, infiltration, decontamination and dispersing property, energy rapid osmotic, to the bonding interface of ink and fiber, slackens bonding force between the two, makes ink particle contribute to separate from fiber.
Alkylphenol polyoxyethylene, i.e. OP-10, is nonionogenic tenside, it makes to remove the ink energy rapid dispersion getting off in water, when being convenient to follow-up mechanical size degradation, flotation and cleaning, removes removing the ink getting off.
Fatty alcohol-polyoxyethylene ether belongs to nonionogenic tenside equally, its water-soluble and good stability, surface tension is lower, wettability is good, emulsifying property is good, can obviously improve deinking effect, fatty alcohol-polyoxyethylene ether or a kind of good trapping agent, contribute to improve waste paper floatation and ink removing efficiency simultaneously.
Sodium stearate has good soil release performance, contributes to control the foam in deinking process simultaneously.
The preparation method of old and useless newspaper-post consumer printing paper neutral deinking agent of the present invention, comprises the following steps:
Step 1, according to parts by weight, take following component: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 60 DEG C～75 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min ± 10; Stirring velocity is down to 50r/min ± 10, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 30min～50min, leave standstill, naturally cooling, to obtain final product.
The present invention uses the de-inking method of old and useless newspaper-post consumer printing paper neutral deinking agent, it is characterized in that, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into fragment, after evenly mixing, put into container;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 0.5%～1.5% described in step 1, it is 8%～10% that heating water is diluted to pulp density, and pulp density is now Deinking Pulp insulation concentration;
Step 3, container is placed in to thermostat water bath, at the temperature of 45 DEG C～60 DEG C, insulation 30min～45min, takes out, and being diluted with water to pulp density is 5%～6%, and pulp density is now Deinking Pulp size degradation concentration; Use slurry disintegrator size degradation, it is 0.6%～1.2% that paper pulp after size degradation is diluted with water to pulp density, and pulp density is now floatation concentration; Use flotation machine flotation, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 1
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 10 parts of sodium stearate, 20 parts of sodium lauryl sulphate, 30 parts of alkylphenol polyoxyethylene, 20 parts of fatty alcohol-polyoxyethylene ether, 20 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 65 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min; Stirring velocity is down to 50r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 30min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample A of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample A, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 1.0% described in step 1, it is 8% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 50 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 45 DEG C, insulation 40min, take out, being diluted with water to pulp density is 5%, uses slurry disintegrator size degradation, and it is 0.6% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 30s, and flotation time is 6min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 2
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 10 parts of sodium stearate, 15 parts of sodium lauryl sulphate, 35 parts of alkylphenol polyoxyethylene, 20 parts of fatty alcohol-polyoxyethylene ether, 20 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 65 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 90r/min; Stirring velocity is down to 50r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 40min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample B of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample B, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 0.8% described in step 1, it is 10% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 48 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 50 DEG C, insulation 45min, take out, being diluted with water to pulp density is 5%, uses slurry disintegrator size degradation, and it is 1.0% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 40s, and flotation time is 5min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 3
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 15 parts of sodium stearate, 17 parts of sodium lauryl sulphate, 25 parts of alkylphenol polyoxyethylene, 23 parts of fatty alcohol-polyoxyethylene ether, 20 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 70 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 95r/min; Stirring velocity is down to 40r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 40min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample C of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample C, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 0.6% described in step 1, it is 8% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 52 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 50 DEG C, insulation 30min, take out, being diluted with water to pulp density is 5%, uses slurry disintegrator size degradation, and it is 0.8% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 40s, and flotation time is 5min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 4
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 10 parts of sodium stearate, 15 parts of sodium lauryl sulphate, 25 parts of alkylphenol polyoxyethylene, 30 parts of fatty alcohol-polyoxyethylene ether, 20 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 70 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min; Stirring velocity is down to 45r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 50min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample D of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample D, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 0.5% described in step 1, it is 10% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 50 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 60 DEG C, insulation 40min, take out, being diluted with water to pulp density is 6%, uses slurry disintegrator size degradation, and it is 1.0% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 50s, and flotation time is 6min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 5
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 12 parts of sodium stearate, 15 parts of sodium lauryl sulphate, 25 parts of alkylphenol polyoxyethylene, 25 parts of fatty alcohol-polyoxyethylene ether, 23 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 60 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min; Stirring velocity is down to 55r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 50min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample E of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample E, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 1.5% described in step 1, it is 10% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 50 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 60 DEG C, insulation 45min, take out, being diluted with water to pulp density is 6%, uses slurry disintegrator size degradation, and it is 1.2% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 60s, and flotation time is 8min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
Embodiment 6
Old and useless newspaper-post consumer printing paper neutral deinking agent, according to parts by weight, composed of the following components: 10 parts of sodium stearate, 15 parts of sodium lauryl sulphate, 25 parts of alkylphenol polyoxyethylene, 20 parts of fatty alcohol-polyoxyethylene ether, 30 parts, water.
The preparation method of this old and useless newspaper-post consumer printing paper neutral deinking agent, comprises the following steps:
Step 1, according to parts by weight, take above-mentioned each component;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 60 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 110r/min; Stirring velocity is down to 60r/min, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 30min, leave standstill, naturally cooling, obtains old and useless newspaper-post consumer printing paper neutral deinking agent sample F of the present invention.
The de-inking method that uses above-mentioned this old and useless newspaper-post consumer printing paper neutral deinking agent sample F, comprises the following steps:
Step 1, old and useless newspaper and post consumer printing paper are all cut into the fragment of 1cm × 1cm, after evenly mixing, put into container, wherein, the weight ratio of old and useless newspaper and post consumer printing paper is 7:3;
Step 2, in container, add the old and useless newspaper-post consumer printing paper neutral deinking agent that accounts for old and useless newspaper and post consumer printing paper gross weight 1.5% described in step 1, it is 9% that heating water is diluted to pulp density, and wherein, the hot water temperature that uses is 50 DEG C;
Step 3, container is placed in to thermostat water bath, at the temperature of 60 DEG C, insulation 40min, take out, being diluted with water to pulp density is 5%, uses slurry disintegrator size degradation, and it is 1.0% that paper pulp after size degradation is diluted with water to pulp density, use flotation machine flotation, wherein, the size degradation time is 60s, and flotation time is 6min, pour paper pulp after flotation the washing of into slurry bag, complete deinking process.
By as shown in the table to the de-inking method of old and useless newspaper-post consumer printing paper neutral deinking agent in above-described embodiment and the deinking efficiency of existing conventional alkaline deinking method contrast situation:
As can be seen from the above table, aspect deinking efficiency, the deinking efficiency of old and useless newspaper-post consumer printing paper neutral deinking agent of the present invention is close with conventional alkaline deinking effect, and after deinking, pulp brightness improves 10%, and ink particle decreasing ratio can reach more than 90%.
Claims (1)
1. a preparation method for old and useless newspaper-post consumer printing paper neutral deinking agent, is characterized in that, comprises the following steps:
Step 1, according to parts by weight, take following component: 10～15 parts of sodium stearate, 15～20 parts of sodium lauryl sulphate, 25～35 parts of alkylphenol polyoxyethylene, 20～30 parts of fatty alcohol-polyoxyethylene ether, 20～30 parts, water;
Step 2, the water that step 1 is taken are poured in reactor, are heated to, after 60 DEG C～75 DEG C, add sodium stearate, are stirred to completely and dissolve with the speed of 100r/min ± 10; Stirring velocity is down to 50r/min ± 10, adds successively sodium lauryl sulphate, alkylphenol polyoxyethylene and fatty alcohol-polyoxyethylene ether, after fully dissolving, continue to stir 30min～50min, leave standstill, naturally cooling, to obtain final product.
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