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1. 发明授权

US06323302B1 Carbonic acid diester, aromatic polycarbonate and facilities, and preparation thereof 有权
标题翻译：碳酸二酯，芳族聚碳酸酯和设备及其制备
公开(公告)号：US06323302B1
公开(公告)日：2001-11-27
申请号：US09445824
申请日：1999-12-14
申请人： Katsushi Sasaki , Wataru Funakoshi , Toru Sawaki , Masumi Hirata , Hiroaki Kaneko , Masanori Abe , Masasi Simonaru , Hidemi Takemoto , Jyuhou Matsuo , Yoshiki Matsuoka
发明人： Katsushi Sasaki , Wataru Funakoshi , Toru Sawaki , Masumi Hirata , Hiroaki Kaneko , Masanori Abe , Masasi Simonaru , Hidemi Takemoto , Jyuhou Matsuo , Yoshiki Matsuoka
IPC分类号： C08G6400
CPC分类号： C08G64/307
摘要： Aromatic polycarbonate having a reduced discoloration and improved heat stability, hue, etc. is provided by keeping a pressure in a raw material melting vessel and the linear velocity of a gas in a transporting piping in a specific range, keeping the concentration of a nitrogen-containing basic compound in a specific range, recycling a byproduct containing specific amounts of impurities, suppressing the amounts of a nitrogen-containing basic compound, metallic elements and a silicic acid derivative in the carbonic acid diester at specific values or less, prescribing the material quality of the reaction facilities, and/or forming an oxide layer at the inner wall surfaces of the reaction facilities.
摘要翻译：通过将原料熔融容器中的压力和输送管道中的气体的线速度保持在特定范围来提供具有减少变色和改善的热稳定性，色相等的芳族聚碳酸酯，保持氮气浓度，含有特定范围的碱性化合物，回收含有特定量的杂质的副产物，抑制碳酸二酯中的含氮碱性化合物，金属元素和硅酸衍生物的量在特定值以下，规定材料质量的反应设备，和/或在反应设备的内壁表面形成氧化物层。

2. 发明授权

US06265524B1 Process for the preparation of aromatic polycarbonate 失效
标题翻译：芳香族聚碳酸酯的制备方法
公开(公告)号：US06265524B1
公开(公告)日：2001-07-24
申请号：US09424318
申请日：1999-11-22
申请人： Hidemi Takemoto , Toru Sawaki , Katsushi Sasaki
发明人： Hidemi Takemoto , Toru Sawaki , Katsushi Sasaki
IPC分类号： C08G6400
CPC分类号： C08G64/307 , C07C68/00 , C07C69/96
摘要： A process for producing an aromatic polycarbonate through an ester interchange reaction between an aromatic carbonic acid diester and an aromatic dihydroxy compound, wherein the aromatic carbonic acid diester is obtained through the decarbonylation reaction of an aromatic oxalic acid diester represented by the following general formula (1): wherein two Ar's are the same or different aromatic hydrocarbon groups having 6 to 14 carbon atoms, and has a hydrolyzable halogen content of 5 ppm or less. According to the present invention, an aromatic polycarbonate having a high molecular weight and excellent color can be easily produced without impairing ester interchange reactivity for the production of the aromatic polycarbonate by using an aromatic carbonic acid diester obtained through the decarbonylation of an aromatic oxalic acid diester and controlling the amount of hydrolyzable halogen contained in the aromatic carbonic acid diester to a value smaller than a predetermined value.
摘要翻译：通过芳族碳酸二酯和芳族二羟基化合物之间的酯交换反应制备芳族聚碳酸酯的方法，其中芳族碳酸二酯通过由以下通式（1）表示的芳族草酸二酯的脱羰反应获得）：其中两个Ar是相同或不同的具有6至14个碳原子的芳族烃基，并且具有5ppm或更低的可水解卤素含量。根据本发明，具有高分子量和优异颜色的芳族聚碳酸酯可以通过使用通过芳香族草酸二酯的脱羰获得的芳香族碳酸二酯和将芳香族碳酸二酯中含有的可水解卤素的量控制在较小的值，可以容易地制造而不损害用于制备芳族聚碳酸酯的酯交换反应性超过预定值。

3. 发明授权

US06525171B2 Process for producing a polycarbonate and method of cleaning a production unit 有权
公开(公告)号：US06525171B2
公开(公告)日：2003-02-25
申请号：US09969582
申请日：2001-10-04
申请人： Hidemi Takemoto , Toru Sawaki , Katsushi Sasaki , Keiichi Kaneko
发明人： Hidemi Takemoto , Toru Sawaki , Katsushi Sasaki , Keiichi Kaneko
IPC分类号： C08F600
CPC分类号： C08G85/008 , C08G64/205 , C08G64/307
摘要： A method of cleaning the aromatic polycarbonate production unit with a carbonic acid diaryl ester at a temperature of 200 to 350° C. in an inert gas atmosphere.

4. 发明授权

US06605686B2 Method for producing an aromatic polycarbonate and method of keeping raw materials thereof 失效
标题翻译：芳香族聚碳酸酯的制造方法及其原料的保存方法
公开(公告)号：US06605686B2
公开(公告)日：2003-08-12
申请号：US10088141
申请日：2002-03-15
申请人： Hidemi Takemoto , Toru Sawaki , Keiichi Kaneko , Katsushi Sasaki
发明人： Hidemi Takemoto , Toru Sawaki , Keiichi Kaneko , Katsushi Sasaki
IPC分类号： C08G6400
CPC分类号： C08G64/307
摘要： An aromatic polycarbonate having excellent color is obtained by keeping an aromatic dihydroxy compound and a carbonic acid diester which are raw materials for the production of an aromatic polycarbonate in consideration of the influences of storage atmosphere, temperature, temperature difference from a storage tank and residence time.
摘要翻译：考虑到储存气氛，温度，与储罐的温度差和停留时间的影响，保留作为芳香族聚碳酸酯的制造原料的芳香族二羟基化合物和碳酸二酯，得到颜色优异的芳香族聚碳酸酯。

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