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Method for producing and bleaching slasher sizing with oil windmill palm empty fruit fibre

A technology for oil palm and mechanical pulp, which is applied in non-fibrous pulp addition, cellulose raw material pulping, pulp beating/refining methods, etc., can solve the problems of long production cycle, pulping pollution, high production cost, and achieve production cost The effect of reducing and saving wood

Inactive Publication Date: 2009-07-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The pollution of pulping is serious, and the investment and cost to solve the pollution are large;
[0006] 2. The production process is complicated, the construction investment is large, and the production cycle is long;
[0007] 3. The paper yield is low, and the pulping yield is generally 45%-50%;
[0008] 4. High production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for producing bleached mechanical pulp with oil palm empty fruit fiber, comprises the steps:

[0023] The first step is to wash the oil palm empty fruit fiber raw material to remove residual oil and break up the knots, and then wash the raw material to remove sand and dust in the raw material;

[0024] In the second step, after filtering and dehydrating, adding a penetrating agent equivalent to 3% of the mass fraction of the dry raw material to the raw material for pre-soaking treatment, the penetrating agent is composed of 25% sodium hydroxide and 1% hydroxyanthracene The aqueous solution composed of quinones was steamed at a temperature of 90°C for 1.5 hours;

[0025] In the third step, after being extruded and dehydrated by the grinding and dividing machine and pressed into silk, it is sent to the first heat refiner for rough grinding. The mass fraction of the wet material concentration is 30% during refining, and the feed temperature is 70°C. The beating...

Embodiment 2

[0032] The method for producing bleached mechanical pulp with oil palm empty fruit fiber, comprises the steps:

[0033] The first step is to wash the oil palm empty fruit fiber raw material to remove residual oil and break up the knots, and then wash the raw material to remove sand and dust in the raw material;

[0034] In the second step, after filtering and dehydrating, adding a penetrating agent equivalent to 4% of the mass fraction of the dry raw material to the raw material for pre-soaking treatment, the penetrating agent is made of sodium hydroxide and 1% of hydroxyanthracene For the aqueous solution composed of quinones, the temperature was raised to 85°C for steaming, and the steaming time was 2.0 hours;

[0035] In the third step, after being extruded and dehydrated by the grinding and dividing machine and pressed into silk, it is sent to the first thermal refiner for rough grinding. The mass fraction of the wet material concentration is 27% during refining, and the f...

Embodiment 3

[0042]The method for producing bleached mechanical pulp with oil palm empty fruit fiber, comprises the steps:

[0043] The first step is to wash the oil palm empty fruit fiber raw material to remove residual oil and break up the knots, and then wash the raw material to remove sand and dust in the raw material;

[0044] In the second step, after filtering and dehydrating, adding a penetrating agent equivalent to 5% of the mass fraction of the dry raw material to the raw material for pre-soaking treatment, the penetrating agent is composed of 25% sodium hydroxide and 1% hydroxyanthracene The aqueous solution composed of quinones was steamed at a temperature of 80°C for 1.0 hour;

[0045] In the third step, after being extruded and dehydrated by the grinding and dividing machine and pressed into silk, it is sent to the first heat refiner for rough grinding. The mass fraction of the wet material concentration is 25% during refining, and the feed temperature is 80°C. The beating d...

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Abstract

The invention discloses a method for using oil palm hollow fruit fibers for the production of bleaching machine pulp, comprising: step 1, subjecting the oil palm hollow fruit fiber raw material to water scrubbing to remove oil stains, sands and dusts; step 2, adding a penetrant for pre-penetration treatment; step 3, extruding and dehydrating by a polishing splitting machine and pressing to filaments to then feed into a first thermofiner for rough grinding so that the fibers are split into coarse pulp; step 4, watering to dilute the coarse pulp roughly-grinded by the thermofiner in order to sieve out the coarse pulp and screened pulp which are extruded and filtered, respectively; step 5, Introducing the sieved coarse pulp into a second thermofiner for continuous thermal grinding, and mixing the grinded size with the screen pulp by a pulp screen in the fourth step; step 6, watering to dilute the grinded size followed by screening via a screen net, delivering the coarse pulp to the second thermofiner for regrinding, concentrating the screened pulp to prepare for bleaching; step 7, employing a high-concentration high-temperature chlorine-free hydrogen peroxide bleaching method to reach 75%-80%ISO of the whiteness of the bleached pulp, and obtaining the bleaching machine pulp via washing, filter-pressing and drying for the papermaking.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for producing bleached mechanical pulp by using oil palm empty fruit fiber. Background technique [0002] Oil palm fiber mainly comes from the trunk, leaf sheath, empty fruit channel and hollow bark raw materials. The cellulose content in the oil palm fiber raw material is as high as 85%, the lignin content is about 18%, and the ash content is low. High-quality raw materials for papermaking are mostly produced in Southeast Asia. The 2008 Malaysian palm tree harvest was bumper. With good weather and high production, Malaysia's palm oil output may reach a record 17.5 million tons this year, higher than the previous year's 15.8 million tons. According to statistics, there are more than 12 million tons of empty fruit fiber raw materials in Malaysia every year. Except for a small amount of fiberboard production or handicrafts, most of them are la...

Claims

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Application Information

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IPC IPC(8): D21C3/00D21H11/12D21B1/02D21B1/16D21D5/02D21D1/20D21H21/00D21C9/16
Inventor 吴养育边静张永琦孙世忠周宗良郑小鹏罗清
Owner SHAANXI UNIV OF SCI & TECH
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