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Method for improving performance of high yield pulp
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A high-yield pulp and high-performance technology, applied in the field of pulp and papermaking, can solve problems such as restricting the development of high-yield pulp, and achieve the effects of increasing use value, improving pulp performance, and improving pulp properties
Inactive Publication Date: 2016-08-10
SOUTH CHINA UNIV OF TECH
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However, for some paper grades that require high bonding strength and surface properties, it is difficult to meet the requirements simply by high-yield pulp, which has become a bottleneck restricting the development of high-yield pulp
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[0026] Use a deflagger to properly decompose the slurry so that it can be better dispersed in water.
[0027] (2) Oxygen / laccase / TEMPO oxidation system combined with ultrasonic treatment
[0028] Add a certain amount of buffer to the decomposed slurry, adjust the pH value of the slurry to 3.0, and thicken the slurry to 5%, then add the prepared laccase enzyme solution and TEMPO solution into the mixer, the amount of laccase enzyme solution It is 20L / t absolute dry pulp, the amount of TEMPO is 50kg / absolute dry pulp, mixed evenly and then sent to the reactor, then fed with oxygen, the oxygen pressure is 0.2MPa, treated at 35°C and 500W power ultrasonic conditions for 4h, the treatment After the end, it enters the pulp washing section, and after being washed by a pulp washing machine, it enters the pulp storage tower for subsequent production.
[0035] Use a deflagger to properly decompose the slurry so that it can be better dispersed in water.
[0036] (2) Oxygen / laccase / TEMPO oxidation system combined with ultrasonic treatment
[0037] Add a certain amount of buffer to the decomposed slurry, adjust the pH value of the slurry to 4.5, and the slurry concentration to 8%, then add the prepared laccase enzyme solution and TEMPO solution into the mixer, the amount of laccase enzyme solution It is 80L / t absolute dry pulp, the amount of TEMPO is 25kg / absolute dry pulp, mixed evenly, sent to the reactor, and then fed with oxygen, the oxygen pressure is 0.3MPa, treated at 35°C and 200W power ultrasonic conditions for 12h, the treatment After the end, it enters the pulp washing section, and after being washed by a pulp washing machine, it enters the pulp storage tower for subsequent production.
[0038] Experimental results:
[0039] Table 2 The technical index of the p...
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Abstract
The invention discloses a method for improving the performance of high-yield pulp, which comprises the following steps: (1) using a deflagger to decompose the pulp so that it can be better dispersed in water; (2) decompressing the pulp Add a buffer to the slurry to adjust the pH value of the slurry to 3.0-4.5, then add the prepared laccase and TEMPO solutions into the mixer, mix them uniformly and send them to the reactor, and then pass oxygen into them for treatment under ultrasonic conditions. After the treatment, it enters the pulp washing section. The invention adopts an oxygen / laccase / TEMPO oxidation system combined with an ultrasonic treatment technology to process the high-yield pulp to achieve the purpose of improving the properties of the pulp. Oxygen / laccase / TEMPO oxidation system is a green catalytic oxidationsystem, which can selectively oxidize pulp, improve pulp performance, and increase pulp use value; it has the advantages of simple operation and mild reaction conditions.
Description
technical field [0001] The invention relates to a technology for improving the performance of high-yield pulp, in particular to a method for improving the performance of high-yield pulp by using an oxygen / laccase / TEMPO oxidation system combined with ultrasonic treatment technology, and belongs to the technical field of pulp and papermaking. Background technique [0002] High-yield pulping technology is especially valuable for my country, which is relatively short of wood fiber resources. During the "Twelfth Five-Year Plan" period, high-yield pulp has become one of the important components of papermaking raw materials in my country, and is widely used in various paper types such as cardboard, toilet paper, facial tissue, newsprint, and low-weight coated paper. However, for some paper grades that require high bonding strength and surface properties, it is difficult to meet the requirements simply by high-yield pulp, which has become a bottleneck restricting the development of ...
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