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公开(公告)号：US11629016B2
公开(公告)日：2023-04-18
申请号：US17310087
申请日：2020-01-20
摘要： A system for transferring solid particles from a first environment at a first gas pressure to a second environment at a second gas pressure. The system comprises a first rotary valve having an inlet which is in fluid communication with the first environment, a second rotary valve having an outlet which is in fluid communication with the second environment, and an intermediate housing bounding an intermediate channel, of which an inlet is fluidly connected to an outlet of the first rotary valve and of which an outlet is fluidly connected to an inlet of the second rotary valve. The intermediate channel is fluidly connected to a third environment maintained at a third gas pressure. The third gas pressure is higher than both the first gas pressure and the second gas pressure or lower than both the first gas pressure and the second gas pressure.
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公开(公告)号：US11338468B2
公开(公告)日：2022-05-24
申请号：US16702770
申请日：2019-12-04
摘要： The disclosure relates to a method for continuous acetylation of wood elements. The acetylation is conducted with an acetylation medium at a pressure of at least 1.5 barg in a substantially oxygen free environment. Alternatively, the method includes the steps of: (a) feeding wood elements in a substantially oxygen free environment to a continuous acetylation reactor, and (b) treating the wood elements with an acetylation medium in the continuous acetylation reactor under wood acetylation reaction conditions, at a pressure of at least 1.5 barg. The process can acetylate wood elements to a high acetyl content in an efficient way, without compromising on the quality of the material. The acetylated wood elements can be used in the production of medium density fibreboards with superior qualities such as dimensional stability and durability.
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公开(公告)号：US10787412B2
公开(公告)日：2020-09-29
申请号：US15327043
申请日：2015-07-17
摘要： Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves recirculating acetylation fluid recovered from wood acetylation to a unit for the production of acetic anhydride from acetic acid and ketene. The acetic anhydride product stream can, in turn, be directly used as a wood acetylation fluid.
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公开(公告)号：US10550065B2
公开(公告)日：2020-02-04
申请号：US15326681
申请日：2015-07-17
IPC分类号： C07C51/56 , B27K3/34 , B27K3/02 , C08B3/06 , C07C51/44 , C08H8/00 , B27K3/36 , B05D7/06 , B27K3/10
摘要： Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves directly using raw acetic anhydride as obtained in the production thereof from ketene, as a wood acetylation fluid.
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公开(公告)号：US20180079104A1
公开(公告)日：2018-03-22
申请号：US15565310
申请日：2016-04-13
CPC分类号： B27K3/346 , B27K3/0207 , B27K3/0228 , B27K3/0271 , B27K3/0278 , B27K3/08 , B27K5/001 , C08B3/06 , C08H8/00
摘要： The present invention relates to a method for continuous acetylation of wood elements. The acetylation is conducted with an acetylation medium at a pressure of at least 1.5 barg in a substantially oxygen free environment. Alternatively, the method according to the invention comprises the steps of: (a) feeding wood elements in a substantially oxygen free environment to a continuous acetylation reactor, and (b) treating the wood elements with an acetylation medium in the continuous acetylation reactor under wood acetylation reaction conditions, at a pressure of at least 1.5 barg.The process according to the present invention allows to acetylate wood elements to a high acetyl content in a very efficient way, without compromising on the quality of the material. The acetylated wood elements can be used in the production of medium density fibreboards with superior qualities such as dimensional stability and durability.
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公开(公告)号：US10166694B2
公开(公告)日：2019-01-01
申请号：US15327027
申请日：2015-07-17
摘要： Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves recovering acetylation fluid from wood acetylation, and sending this to an acetic anhydride distillation unit belonging to the acetic anhydride production plant.
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公开(公告)号：US20170204043A1
公开(公告)日：2017-07-20
申请号：US15326681
申请日：2015-07-17
摘要： Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves directly using raw acetic anhydride as obtained in the production thereof from ketene, as a wood acetylation fluid.
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公开(公告)号：US20170204042A1
公开(公告)日：2017-07-20
申请号：US15326675
申请日：2015-07-17
CPC分类号： C07C51/46 , B01D3/14 , B01J19/245 , B01J2219/24 , B27K3/346 , C07C51/44 , C07C51/56 , C08B3/06 , C08H8/00 , Y02E50/14 , C07C53/12 , C07C53/08
摘要： Disclosed is the integration of the production of acetic anhydride from ketene, and the acetylation of wood using acetylation fluid comprising acetic acid and acetic anhydride. The invention involves combining acetic acid obtained from distillation of acetylation fluid with a residual aqueous acetic acid stream as obtained from ketene production.
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公开(公告)号：US20220274281A1
公开(公告)日：2022-09-01
申请号：US17652550
申请日：2022-02-25
摘要： The present invention relates to a method for continuous acetylation of wood elements. The acetylation is conducted with an acetylation medium at a pressure of at least 1.5 barg in a substantially oxygen free environment. Alternatively, the method according to the invention comprises the steps of: (a) feeding wood elements in a substantially oxygen free environment to a continuous acetylation reactor, and (b) treating the wood elements with an acetylation medium in the continuous acetylation reactor under wood acetylation reaction conditions, at a pressure of at least 1.5 barg. The process according to the present invention allows to acetylate wood elements to a high acetyl content in a very efficient way, without compromising on the quality of the material. The acetylated wood elements can be used in the production of medium density fibreboards with superior qualities such as dimensional stability and durability.
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公开(公告)号：US20220073289A1
公开(公告)日：2022-03-10
申请号：US17310087
申请日：2020-01-20
IPC分类号： B65G53/46
摘要： A system for transferring solid particles from a first environment at a first gas pressure to a second environment at a second gas pressure. The system comprises a first rotary valve having an inlet which is in fluid communication with the first environment, a second rotary valve having an outlet which is in fluid communication with the second environment, and an intermediate housing bounding an intermediate channel, of which an inlet is fluidly connected to an outlet of the first rotary valve and of which an outlet is fluidly connected to an inlet of the second rotary valve. The intermediate channel is fluidly connected to a third environment maintained at a third gas pressure. The third gas pressure is higher than both the first gas pressure and the second gas pressure or lower than both the first gas pressure and the second gas pressure.
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