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1. 发明专利

AU5109800A Digestion method for pulp 未知
公开(公告)号：AU5109800A
公开(公告)日：2001-01-02
申请号：AU5109800
申请日：2000-06-13
申请人： KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD , ASAHI GLASS CO LTD
发明人： ANDOH TATSUYA , TANAKA JUNJI , WATANABE KEIGO , NANRI YASUNORI , NAKAO MAKOTO
IPC分类号： D21C3/02 , D21C3/22 , D21C3/00
摘要： A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calculated as a standard oxidation-reduction potential (Ea) with a hydrogen ion activity of 1, is within a range of from 0.12 to 0.25V to the standard hydrogen electrode potential. It is thereby possible to cook the lignocellulose material with a low Kappa number and in good yield and at the same time, to reduce the amount of the chemical solution used and to reduce the load on a recovery boiler.

2. 发明专利

AU5109700A Digesting liquor for pulp and method for producing pulp 未知
公开(公告)号：AU5109700A
公开(公告)日：2001-01-02
申请号：AU5109700
申请日：2000-06-13
申请人： KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD , ASAHI GLASS CO LTD
发明人： ANDOH TATSUYA , TANAKA JUNJI , SUMINO TOSHIHIKO , WATANABE KEIGO , NAKAO MAKOTO
IPC分类号： D21C3/02 , D21C3/22 , D21C3/00

3. 发明专利

AU4781400A Process for digesting lignocellulose material 未知
公开(公告)号：AU4781400A
公开(公告)日：2000-12-18
申请号：AU4781400
申请日：2000-05-26
申请人： ASAHI GLASS CO LTD , KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD
发明人： SHIMIZU MASAHIRO , WATANABE KEIGO , ANDOH TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/00 , D21C3/02 , D21C3/22 , D21C3/24 , D21C7/00

4. 发明专利

AU4950200A Method for recovering chemicals in a process of producing pulp by kraft process 未知
公开(公告)号：AU4950200A
公开(公告)日：2000-12-18
申请号：AU4950200
申请日：2000-05-26
申请人： ASAHI GLASS CO LTD , KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD
发明人： NANRI YASUNORI , ANDOH TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/02 , D21C11/00 , D21C11/04

5. 发明专利

AU4781500A Process for digesting lignocellulose material 未知
公开(公告)号：AU4781500A
公开(公告)日：2000-12-18
申请号：AU4781500
申请日：2000-05-26
申请人： ASAHI GLASS CO LTD , KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD
发明人： SHIMIZU MASAHIRO , WATANABE KEIGO , ANDOH TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/00 , D21C3/02 , D21C3/22

6. 发明专利

JP2000336586A COOKING OF LIGNOCELLOSIC MATERIAL 失效
公开(公告)号：JP2000336586A
公开(公告)日：2000-12-05
申请号：JP15075899
申请日：1999-05-28
申请人： JUJO PAPER CO LTD , KAWASAKI KASEI CHEMICALS , ASAHI GLASS CO LTD
发明人： SHIMIZU MASAHIRO , WATABE KEIGO , ANDO TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/00 , D21C3/02 , D21C3/22
摘要： PROBLEM TO BE SOLVED: To reduce the Kappa number at the same effective alkali addition ratio and improve the pulp yield at the same Kappa number in a method for cooking a lignocellulosic material. SOLUTION: This method comprises using hardwood or coniferous chips, adding an alkaline cooking liquor containing a polysulfide sulfur at 3-20 g/L concentration expressed in terms of sulfur content and further the sulfur content in an amount of.45-100 wt.% and an effective alkali in an amount of 45-79 wt.% based on the respective total amounts contained in the alkaline cooking liquor introduced into the cooking system to the top of a digester and further feeding an alkaline cooking liquor containing a quinone compound in an amount of 0.01-1.5 wt.% based on the bone-dry chips to the digester in the continuous cooking method using the one vessel digester comprising a column top zone, an upper cooking zone and a lower cooking zone installed from the top to the bottom in the interior of the digester, a strainer arranged in each zone bottom and capable of discharging a cooking black liquor extracted from at least the one strainer of the respective strainers to the outside of the cooking system.

7. 发明专利

JP2000336589A METHOD FOR RECOVERING CHEMICAL AGENT IN PROCESS FOR PRODUCING KRAFT METHOD PULP 失效
公开(公告)号：JP2000336589A
公开(公告)日：2000-12-05
申请号：JP15035499
申请日：1999-05-28
申请人： JUJO PAPER CO LTD , KAWASAKI KASEI CHEMICALS , ASAHI GLASS CO LTD
发明人： WATABE KEIGO , NANRI YASUTOKU , SAKAI KAZUAKI , ANDO TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/02 , D21C11/00 , D21C11/04
摘要： PROBLEM TO BE SOLVED: To close a process for producing kraft pulp, improve the yield of the pulp, and decrease problems on enviromnents as much as possible, in the process for producing the kraft pulp. SOLUTION: This method for recovering a chemical agent in a process for producing kraft method pulp comprises electrolyzing by an electrolytic oxidation method a Na2S-containing alkaline solution flowing in a process for producing the kraft method pulp, adding the solution generated on the anode side and containing polysulfide sulfur in a concentration of >=6 g/L as such or after converted into a causticization product, before the chips do not reach the highest temperature, adding a NaOH solution generated on the cathode side in at least one process between a time when the chips reach the highest temperature and the final bleaching process, recovering one or more chemical agents from a process containing at least NaOH among chemical agents discharged between a cooking process and the final bleaching process, and then reusing the recovered chemical agent.

8. 发明专利

JP2000336587A COOKING OF LIGNOCELLOSIC MATERIAL 失效
公开(公告)号：JP2000336587A
公开(公告)日：2000-12-05
申请号：JP15078299
申请日：1999-05-28
申请人： JUJO PAPER CO LTD , KAWASAKI KASEI CHEMICALS , ASAHI GLASS CO LTD
发明人： SHIMIZU MASAHIRO , WATABE KEIGO , ANDO TATSUYA , NAKAO MAKOTO
IPC分类号： D21C3/00 , D21C3/02 , D21C3/22 , D21C3/24 , D21C7/00
摘要： PROBLEM TO BE SOLVED: To reduce the Kappa number at the same effective alkali addition ratio and improve the pulp yield at the same Kappa number in a method for cooking a lignocellulosic material. SOLUTION: This method comprises using hardwood or coniferous chips, adding an alkaline cooking liquor containing a polysulfide sulfur at 3-20 g/L concentration expressed in terms of sulfur content and further the sulfur content in an amount of 45-100 wt.% and an effective alkali in an amount of 45-79 wt.% based on the respective total amounts contained in the alkaline cooking liquor introduced into the cooking system to the top of a permeating vessel and further feeding an alkaline cooking liquor containing a quinone compound in a specific amount based on the bone-dry chips to the permeating vessel or the bottom of an upper cooking zone in the continuous cooking method using two vessel digesting devices comprising the permeating vessel installed in front of a digester and a column top zone, the upper cooking zone and a lower cooking zone installed from the top to the bottom in the interior of the digester, a strainer arranged in each zone bottom and capable of discharging a cooking black liquor extracted from at least the one strainer of the respective strainers to the outside of the cooking system.

9. 发明专利

CA2374913C METHOD FOR RECOVERING CHEMICALS IN A PROCESS OF PRODUCING KRAFT PULP 未知
公开(公告)号：CA2374913C
公开(公告)日：2009-07-21
申请号：CA2374913
申请日：2000-05-26
申请人： KAWASAKI KASEI CHEMICALS , JUJO PAPER CO LTD
发明人： NANRI YASUNORI , WATANABE KEIGO , ANDOH TATSUYA , NAKAO MAKOTO , SAKAI KAZUAKI
IPC分类号： D21C3/02 , D21C9/10 , D21C11/00 , D21C11/04
摘要： In a process for producing kraft pulp, the process is made closed, the yield of pulp is improved and environmental problems are minimized. An alkaline solution containing Na2S which flows in a process of producing kraft pulp, is electrolyzed by an electrolytic oxidation method; a liquid which is formed at an anode side and contains a polysulfide type sulfur in an amount of 6 g/9 or more, is added, as it is or after being causticized, to the process before a chip has the maximum temperature, and a NaOH solution formed at a cathode side, is added to at least one step of the process after the chip has the maximum temperature till a final bleaching stage; and at least chemicals in the step wherein NaOH is added, among chemicals discharged in all steps from a cooking step till the final bleaching stage, are recovered and reused.

10. 发明专利

CA2374780C COOKING METHOD FOR PULP 未知
公开(公告)号：CA2374780C
公开(公告)日：2008-09-16
申请号：CA2374780
申请日：2000-06-13
申请人： JUJO PAPER CO LTD , KAWASAKI KASEI CHEMICALS
发明人： ANDOH TATSUYA , TANAKA JUNJI , WATANABE KEIGO , NAKAO MAKOTO , NANRI YASUNORI
IPC分类号： D21C3/02 , D21C3/22
摘要： A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calculated as a standard oxidation-reduction potential (Ea) with a hydroxyl ion activity of 1, is within a range of from 0.12 to 0.25V to the standard hydrogen electrode potential. It is thereby possible to cook the lignocellulose material with a low Kappa number and in good yield and at the same time, to reduce the amount of the chemical solution used and to reduce the load on a recovery boiler.

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