Method for preparing eupatorium adenophorum spreng bleached paper pulp by use of OD1EpD2 process
A technology of E. japonica and pulp, which is applied in the directions of pulping with inorganic alkali, pulp bleaching, post-treatment of cellulose pulp, etc., can solve the problem of high whiteness and damage of bleached pulp, and the inability of E. japonica to produce high brightness. pulp and other issues
Active Publication Date: 2014-10-01
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING +1
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[0006] The purpose of the present invention is to provide a method for using OD 1 EpD 2 A method for producing bleached paper pulp of Eupatorium adenophorum. This method realizes the resource utilization of Eupatorium adenophorum. The method has the advantages of high whiteness of bleached pulp, high viscosity of pulp after bleaching, and can be used to prepare paper with higher whiteness , to achieve the purpose of turning harm into wealth, and can effectively solve the current defect that Eupatorium adenophorum cannot produce high-brightness pulp
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[0024] like figure 1 As shown, one adopts OD 1 EpD 2 The method for making Eupatorium adenophorum bleached paper pulp comprises the following steps (the amount of each raw material involved in the embodiment is calculated with absolute dry raw material quality):
[0025] Step 1: drying the whole plant of Eupatorium adenophorum, removing leaves, cutting into 25mm-long pieces, soaking in water at a temperature of 25-80°C for 12-36 hours, peeling after soaking;
[0026] Step 2, add NaOH, NaOH in tablet 2 The medicinal solution made of S and water is put into an electric heating pressure cooker for cooking. Calculated based on the mass of absolute dry raw materials, the amount of NaOH added is 15-22%. 2 The amount of S added is 12-18%, the liquid ratio is 1:3-4, the temperature is raised from room temperature to 150-190°C, the heating time is 90-120 minutes, the temperature is kept at the highest temperature for 90-120 minutes, and the entire cooking time is 180-240 minutes; ...
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The invention discloses a method for preparing eupatorium adenophorum spreng bleached paper pulp by use of OD1EpD2 process. The method comprises the following steps: step 1, preparing the sulfate unbleached pulp of the eupatorium adenophorum spreng; step 2, putting the sulfate unbleached pulp of the eupatorium adenophorum spreng into a high-pressure reaction kettle, and introducing oxygen to perform oxygen delignification treatment on the pulp; step 3, adding ClO2 to the pulp after the oxygen delignification treatment for bleaching, and washing the blanched pulp with clear water until the pulp is neutral; step 4, adding NaOH and H2O2 to the pulp for alkali extraction, and after terminating the reaction, washing the pulp with clear water until the pulp is neutral; step 5, adding ClO2 to the pulp for bleaching, and washing the blanched pulp with clear water until the pulp is neutral, thereby obtaining the eupatorium adenophorum spreng bleached pulp. The method is applicable to industrial large-scale production, and the obtained bleached pulp is relatively high in whiteness and viscosity, and thus can be used for making high-whiteness and high strength paper in combination with other pulps.
Description
technical field [0001] The invention belongs to the technical field of pulping and papermaking, in particular to a 1 EpD 2 Process for making bleached pulp from Eupatorium adenophorum. Background technique [0002] Eupatorium adenophorum Spreng is a typical alien invasive species, mainly distributed in Yunnan, Guizhou, Sichuan, Chongqing, Guangxi, Hubei and Tibet. Since it invaded our country, it has brought serious threats to our country's agriculture, ecology and environment. It is known that the spreading speed of Eupatorium adenophorum can reach 60 km / year, and has already encroached on a large amount of farmland and forest land. Its hazards include: the whole plant is poisonous, endangering the production of agriculture, forestry and animal husbandry, etc.; the soil fertility is reduced, the land is degraded, and the crop yield is greatly reduced, which can cause a reduction in grain production; the branches and leaves are poisonous, endangering people and other anim...
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IPC IPC(8): D21C9/147D21C9/14D21C9/16D21C3/02D21B1/02
Inventor 管秀琼吴半农杨红霞刘建容柳启文高洪霞刘春谭宗华
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING