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公开(公告)号：US11643777B2
公开(公告)日：2023-05-09
申请号：US17003352
申请日：2020-08-26
发明人： Xingxiang Ji , Zhongjian Tian , Guihua Yang , Gaojin Lv , Wei Wei , Jiachuan Chen
CPC分类号： D21C9/1057 , D21C1/02 , D21C9/1042 , D21C9/153 , D21C9/163 , D21H11/04
摘要： The present application relates to a method for preparing dissolving pulp by TCF bleaching of poplar KP, including: preparing poplar KP by pre-hydrolysis kraft process with poplar as a raw material, and OZQP bleaching of the poplar KP to obtain dissolving pulp, wherein O denotes oxygen delignification, Z denotes ozone bleaching, Q denotes chelating treatment, and P denotes hydrogen peroxide bleaching. The dissolving pulp prepared by the same exhibits that all indexes can meet the requirements of excellent products in dissolving pulp industry standard (QB/T4898-2015), and most of the indexes are far superior to those of excellent products, and thus it can completely replace imported dissolving pulp.
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公开(公告)号：US11624154B2
公开(公告)日：2023-04-11
申请号：US16954275
申请日：2019-04-29
发明人： Jiachuan Chen , Xingxiang Ji , Guihua Yang , Zhongjian Tian , Ruiming Wang , Yuqian Guo
摘要： A method for preparing unbleached biomechanical pulp from straw. A straw is used as a raw material, which is treated with alkaline biological enzymes, heated with hot alkali steam, refined, and washed. The mechanical pulp prepared by the method of the present invention has significantly improved ring-crush strength, can be used to prepare corrugated paper or cardboard paper, and can significantly improve the compressive strength of the carton.
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公开(公告)号：US11834784B2
公开(公告)日：2023-12-05
申请号：US17561347
申请日：2021-12-23
发明人： Xingxiang Ji , Jiachuan Chen , Zhongjian Tian , Ruiming Wang , Dongxing Wang , Yu Liu
摘要： The present disclosure relates to a method for preparing an unbleached biomechanical pulp and fully utilizing by-products by treating wheat straws with heat steam in synergy with biological enzymes, which belongs to the technical field of papermaking technology and waste comprehensive utilization. The present disclosure provides a method for preparing an unbleached biomechanical pulp by treating whole wheat straws with heat steam in synergy with biological enzymes, where the prepared high-strength biomechanical pulp can meet the requirements of producing unbleached packaging paper and paper-based materials. At the same time, the by-products are recycled to prepare a biomass compound fertilizer, which turns solid waste into treasure and realizes the high-value full utilization of wheat straw. Therefore, the method in the present disclosure is simple, green, clean and efficient, which has good practical application value and broad application prospects.
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公开(公告)号：US11566376B2
公开(公告)日：2023-01-31
申请号：US16772509
申请日：2019-04-29
发明人： Xingxiang Ji , Ruiming Wang , Zhongjian Tian , Jiachuan Chen , Guihua Yang , Yuqian Guo
摘要： A method for preparing unbleached biomechanical pulp from straw. Straw is used as a raw material, which is firstly pre-treated with hot water and hot steam, added with a small amount of alkali, and then softened by saturation with hot water, enzymatically treated by adding alkaline biological enzymes, refined, and washed. This method has the advantage that the whole production process does not need alkali recovery, thereby avoiding environmental pollution from the source. This technology conforms to the national industrial policy of resource conservation, economic recycling, energy saving and emission reduction. The present invention overcomes the problems of difficulty in recovering the alkali wastewater accompanying straw pulp and serious pollution in the prior art. This is of great significance for the industrial production of straw pulp and the development of the paper industry.
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