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公开(公告)号：US20220205176A1
公开(公告)日：2022-06-30
申请号：US17561158
申请日：2021-12-23
发明人： Zhongjian TIAN , Xingxiang JI , Dongxing WANG , Wenjia HAN , Hao MA , Xuejun SHAO
IPC分类号： D21C5/00 , C12P1/00 , D21C1/02 , D21C1/06 , D21D1/30 , D21C11/10 , D21C11/00 , D21H11/12 , C05F7/02
摘要： The disclosure relates to a method for preparing unbleached biomechanical pulp by hot steam and biological enzyme treatment and full utilization of by-products thereof, and belongs to the technical field of papermaking technology and comprehensive utilization of waste. The present disclosure proposes a method for preparing high-strength unbleached biomechanical pulp, using whole wheat straw as a raw material, by using hot water in coordination with an alkaline biological enzyme to treat whole wheat straw, thereby meeting the requirements for the production of unbleached linerboard and paper-based materials, and recycling by-products thereof to prepare biomass compound fertilizers, which creates wealth from solid waste and realizes the high-value full utilization of wheat straw. The preparation method of the disclosure is simple, green, clean and efficient, and has good practical application value and broad application prospects.
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2.发明申请公开(公告)号：US20210062419A1
公开(公告)日：2021-03-04
申请号：US17002598
申请日：2020-08-25
发明人： Zhongjian TIAN , Xingxiang JI , Jiachuan CHEN , Guihua YANG , Wei WEI , Wenjia HAN
摘要： The application relates to a method for preparing dissolving pulp by totally chlorine-free bleaching of poplar kraft pulp, including: preparing poplar kraft pulp by pre-hydrolysis kraft process with poplar as raw material; ZOQP bleaching of poplar kraft pulp to obtain dissolving pulp, wherein Z denotes ozone bleaching, O denotes oxy delignification, Q denotes chelation treatment, and P denotes hydrogen peroxide bleaching. In this way, washing and bleaching wastewater can be recycled in entire preparation process described above, achieving “zero” discharge. The dissolving pulp prepared by the method has no residual toxic substances, and exhibits that all indexes exceed the requirements of qualified products in dissolving pulp industry standard (QB/T 4898-2015), and most of indexes meet those of excellent products; thus, it can replace imported dissolving pulp. The use of the method significantly solved the problems of large pollution in the production and shortage of raw materials for viscose fibers.
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公开(公告)号：US20220205177A1
公开(公告)日：2022-06-30
申请号：US17561237
申请日：2021-12-23
发明人： Xingxiang JI , Ruiming WANG , Zhongjian TIAN , Jiachuan CHEN , Guihua YANG , Gaojin LV
IPC分类号： D21C5/00 , C12P1/00 , D21B1/06 , D21C1/02 , D21C1/06 , D21D1/20 , D21C9/02 , D21C11/10 , D21C11/00 , D21H11/12 , C05F7/02
摘要： The disclosure belongs to the technical field of papermaking technology and waste comprehensive utilization, and specifically relates to a method for preparing biomechanical unbleached pulp from wheat straw and full utilization of by-products thereof. In the present disclosure, wheat straw is used as raw materials for pulping, and treated by hot water, then a trace of KOH is added, the temperature of the wheat straw after heat saturation and softening is adjusted, alkaline compound enzymes is added for biological treatment, and refining of wheat straw is performed at last. The mechanical pulp meets the production requirements for unbleached packaging paper and paper-based materials, meanwhile, the by-products are recycled to prepare a biomass compound fertilizer, turning solid waste into treasures, and realizing a high value full utilization of wheat straw. Thus a good practical application value and a broad application prospect are performed.
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公开(公告)号：US20210054566A1
公开(公告)日：2021-02-25
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：US20230349098A1
公开(公告)日：2023-11-02
申请号：US18014129
申请日：2021-08-05
发明人： Jiachuan CHEN , Guihua YANG , Kai ZHANG , Zhongjian TIAN , Xingxiang JI , Gaojin LYU , Qichao GAO
CPC分类号： D21C9/153 , D21C9/1057 , D21C9/163 , D21C9/14 , D21H11/04
摘要： The present disclosure belongs to the technical field of papermaking, and specifically relates to a short-sequence ECF bleaching process X/Z/D-EOP-D or X/D/Z-EOP-D for kraft wood pulp, comprising the following steps: (1) sequential bleaching (X/Z/D or X/D/Z): subjecting an oxygen delignified wood pulp to X/Z/D1 or X/D1/Z sequential bleaching to prepare a semi-bleached pulp; (2) reinforced alkaline extraction treatment (EOP): performing hydrogen peroxide and oxygen enhanced alkaline extraction treatment on the pulp after sequential bleaching to further dissolve the residual lignin in the pulp; (3) supplemental bleaching (D): performing a chlorine dioxide supplemental bleaching on the pulp after the enhanced alkaline extraction treatment to obtain a fully bleached pulp (88% ISO).
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公开(公告)号：US20220205178A1
公开(公告)日：2022-06-30
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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7.发明申请公开(公告)号：US20220205179A1
公开(公告)日：2022-06-30
申请号：US17561482
申请日：2021-12-23
发明人： Zhongjian TIAN , Ruiming WANG , Xingxiang JI , Yinkai GE , Jiachuan CHEN , Guihua YANG , Hao MA
摘要： The present disclosure relates to a method for preparing an unbleached biomechanical pulp from straws and full utilization of by-products, which belongs to the technical field of papermaking technology and waste comprehensive utilization. In the present disclosure, straw as raw material for pulping is treated with steam, then a small amount of KOH is added, the straw is softened by hydrothermal saturation, then the temperature of the straw is adjusted, alkaline compound enzymes are added for biological treatment, and finally the straw is refined, where the prepared mechanical 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 biomass compound fertilizer, which turns solid waste into treasure and realizes the high-value full utilization of wheat straw. Therefore, it has good practical application value and broad application prospects.
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公开(公告)号：US20210062420A1
公开(公告)日：2021-03-04
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
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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