Process for Producing Fiber Pulp Utilizing Bamboo and Pulp Produced Using the Same

a technology of fiber pulp and bamboo, which is applied in the direction of pulping with inorganic bases, pretreatment with water/steam, building rescue, etc., can solve the problems of increasing the emissions of greenhouse gases, increasing the cost of pulp production, so as to achieve low environmental pollution and high pulp production yield

a technology of fiber pulp and bamboo, which is applied in the direction of pulping with inorganic bases, pretreatment with water/steam, building rescue, etc., can solve the problems of increasing the emissions of greenhouse gases, increasing the cost of pulp production, so as to achieve low environmental pollution and high pulp production yield

US20080295982A1Inactive Publication Date: 2008-12-04LEE KWON HYOK +1
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  • Process for Producing Fiber Pulp Utilizing Bamboo and Pulp Produced Using the Same
  • Process for Producing Fiber Pulp Utilizing Bamboo and Pulp Produced Using the Same
  • Process for Producing Fiber Pulp Utilizing Bamboo and Pulp Produced Using the Same

Examples

Experimental program
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example 1

[0118]A Myanmar bamboo was split to a width of about 2 mm and then cut to a length of 15-25 mm. The cut material was screened through a 60-mesh screen to remove contaminants and small bamboo fragments, followed by washing.

[0119]400 g (on a oven-dry weight-basis) of the washed bamboo was placed in a digester into which water was added to make a liquor ratio of 6:1. Then, a stainless weight is laid on the bamboo such that the bamboo could be sufficiently immersed in water.

[0120]After the digester was covered with a lid and screwed, the bamboo was subjected to prehydrolysis at 170° C. for 90 minutes.

[0121]After completion of the prehydrolysis, the content within the digester was washed and then placed again into the digester, into which 16% active alkali (calculated as Na2O) and 0.1% anthraquinone were added so as to adjust the liquor ratio to 4:1. Then, the bamboo was cooked at 170° C. for 120 minutes.

[0122]The cooked pulp was washed and subjected to a four-stage bleaching of DEDD, an...

example 2

[0123]The treatment of bamboo and most of conditions were the same as in Example 1, but the prehydrolysis and bleaching conditions were as follows:

[0124]The liquor ratio in the prehydrolysis Was adjusted to 4:1, and the prehydrolysis was conducted at 170° C. for 100 minutes.

[0125]The cooked and washed pulp was subjected to a four-stage bleaching of DEDP, and the properties of the resulting pulp are shown in Table 2 below.

TABLE 2Results of prehydrolysis and pulping tests of bambooYield of pulp before bleaching37.8Kappa number*9.8Yield of pulp after bleaching36.2Brightness (% ISO)86.2Alpha-cellulose95.4Viscosity (cps)5.1Degree of polymerization821

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Abstract

Disclosed is a process for producing pulp utilizing bamboo, comprising finely cutting the bamboo into short segments and subjecting the cut bamboo to screening and washing processes to thereby produce dissolving pulp capable of achieving reduced consumption of chemical agents used during pre-hydrolysis and pulping processes and case of reaction, and having superior quality and high yield. Further, provided are also a process for producing fiber (dissolving) pulp utilizing bamboo, capable of preventing generation of dioxin by bleaching the pulp via ECF or TCF bleaching, and a pulp produced using the same.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for producing fiber pulp using bamboos, and more particularly to a method for producing good-quality fiber (dissolving) pulp using bamboos, which comprises longitudinally splitting the bamboo, transversely cutting the split bamboo to short lengths, dissolving hemicellulose from the cut material by prehydrolysis, and bleaching the prehydrolyzed material with a bleaching agent causing low environmental pollution, and thus has a high pulp production yield and does not emit environmental pollutants such as dioxin, as well as pulp produced thereby.[0002]Generally, papermaking and dissolving pulps are recognized to be produced using wood.[0003]As used herein, the term “dissolving pulp” refers to fiber pulp that can be used later to produce fibers.[0004]In other words, because the dissolving pulps consist mostly of wood pulps, and producing pulp as the raw material of paper while conserving forests due to the lack of wood resou...

Claims

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Application Information

Patent Timeline
04 Dec 2008
Publication
US20080295982A1
IPC
D21C9/02
CPC
D21C1/02; D21C1/04; D21C3/02; D21C3/222; D21C5/00; D21C9/10; E06C9/02; A62B1/20
Inventors
LEE, KWON-HYOK; WON, JONG-MYOUNG