专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 外观设计

USD326714S Endoscope for blood vessel 失效
公开(公告)号：USD326714S
公开(公告)日：1992-06-02
申请号：US451726
申请日：1989-12-15
申请人： Nobuyuki Funakoshi , Tsuruo Hatori , Nobuaki Akui , Tohru Shimizu , Masahiro Kawashima
设计人： Nobuyuki Funakoshi , Tsuruo Hatori , Nobuaki Akui , Tohru Shimizu , Masahiro Kawashima

2. 发明授权

US07173150B2 Process for recovering terephthalic acid from pulverized product of spent polyethylene terephthalate and system for use in such process 失效
标题翻译：从废聚对苯二甲酸乙二醇酯的粉碎产物中回收对苯二甲酸的方法和用于该方法的体系
公开(公告)号：US07173150B2
公开(公告)日：2007-02-06
申请号：US10424042
申请日：2003-04-24
申请人： Jinichi Yazaki , Kozaburo Sakano , Nobuyuki Funakoshi , Kazuho Tanaka
发明人： Jinichi Yazaki , Kozaburo Sakano , Nobuyuki Funakoshi , Kazuho Tanaka
IPC分类号： C07C51/09
CPC分类号： C07C51/43 , C07C51/09 , C07C51/412 , C07C51/47 , C08J11/24 , C08J2367/02 , Y02W30/706 , C07C63/28 , C07C63/26
摘要： This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate. This process comprises (1) a decomposition reaction step where the pulverized products of spent polyethylene terephthalate are continuously subjected to decomposition reaction in ethylene glycol in the presence of alkali, which is equimolar or excessmolar relative to the polyethylene terephthalate, so that salt of terephthalic acid and ethylene glycol can be continuously obtained; (2) a solid-liquid separation, dissolution, impurities-removing step where the ethylene glycol is separated from decomposition reaction slurry of salt of terephthalic acid and ethylene glycol, and the solid salt of terephthalic acid is dissolved into water, while insoluble impurities are removed; (3) a neutralization, crystallization step, where solution of said salt of terephthalic acid is neutralized with acid so that terephthalic acid can be crystallized; (4) a solid-liquid separation, washing stop where slurry of terephthalic acid crystals is subjected to solid-liquid separation so that the terephthalic acid crystals can be obtained and washed; and (5) a drying, pulverization step where the washed terephthalic acid crystals are dried and pulverized.
摘要翻译：本发明提供一种从废聚对苯二甲酸乙二醇酯的粉碎产物中回收对苯二甲酸的方法。该方法包括：（1）分解反应步骤，其中废聚对苯二甲酸乙二醇酯的粉碎产物在相对于聚对苯二甲酸乙二醇酯等摩尔或过量的碱的存在下在乙二醇中连续进行分解反应，使得对苯二甲酸的盐可连续获得乙二醇; （2）从对苯二甲酸和乙二醇盐的分解反应浆液中分离出乙二醇和对苯二甲酸的固体盐的固液分离，溶解，杂质去除步骤溶解在水中，不溶性杂质为删除（3）中和，结晶步骤，其中所述对苯二甲酸盐的溶液用酸中和，使对苯二甲酸可以结晶; （4）固液分离，其中对苯二甲酸晶体的浆液进行固液分离以使得可以获得和洗涤对苯二甲酸晶体的洗涤停止; 和（5）干燥，粉碎步骤，其中将洗涤的对苯二甲酸晶体干燥并粉碎。

3. 发明授权

US06580005B1 Process for recovering terephthalic acid from pulverized product of spent polyethylene terephthalate and system for use in such process 失效
标题翻译：从废聚对苯二甲酸乙二醇酯的粉碎产物中回收对苯二甲酸的方法和用于该方法的体系
公开(公告)号：US06580005B1
公开(公告)日：2003-06-17
申请号：US09721057
申请日：2000-11-22
申请人： Jinichi Yazaki , Kozaburo Sakano , Nobuyuki Funakoshi , Kazuho Tanaka
发明人： Jinichi Yazaki , Kozaburo Sakano , Nobuyuki Funakoshi , Kazuho Tanaka
IPC分类号： C07C5109
CPC分类号： C07C51/43 , C07C51/09 , C07C51/412 , C07C51/47 , C08J11/24 , C08J2367/02 , Y02W30/706 , C07C63/28 , C07C63/26
摘要： This invention provides a process a process for recovering terephthalic acid from pulverized products of spent polyethylene terephthalate. This process comprises (1) a decomposition reaction step where the pulverized products of spent polyethylene terephthalate are continuously subjected to decomposition reaction in ethylene glycol in the presence of alkali, which is equimolar or excessmolar relative to the polyethylene terephthalate, so that salt of terephthalic acid and ethylene glycol can be continuously obtained; (2) a solid-liquid separation, dissolution, impurities-removing step where the ethylene glycol is separated from decomposition reaction slurry of salt of terephthalic acid and ethylene glycol, and the solid salt of terephthalic acid is dissolved into water, while insoluble impurities are removed; (3) a neutralization, crystallization step, where solution of said salt of terephthalic acid is neutralized with acid so that terephthalic acid can be crystallized; (4) a solid-liquid separation, washing step where slurry of terephthalic acid crystals is subjected to solid-liquid separation so that the terephthalic acid crystals can be obtained and washed; and (5) a drying, pulverization step where the washed terephthalic acid crystals are dried and pulverized.
摘要翻译：本发明提供一种从废聚对苯二甲酸乙二醇酯的粉碎产物中回收对苯二甲酸的方法。该方法包括：（1）分解反应步骤，其中废聚对苯二甲酸乙二醇酯的粉碎产物在相对于聚对苯二甲酸乙二醇酯等摩尔或过量的碱的存在下在乙二醇中连续进行分解反应，使得对苯二甲酸的盐可连续获得乙二醇; （2）从对苯二甲酸和乙二醇盐的分解反应浆液中分离出乙二醇和对苯二甲酸的固体盐的固液分离，溶解，杂质去除步骤溶解在水中，不溶性杂质为删除（3）中和，结晶步骤，其中所述对苯二甲酸盐的溶液用酸中和，使对苯二甲酸可以结晶; （4）固液分离洗涤步骤，其中将对苯二甲酸晶体的浆液进行固液分离，以获得和洗涤对苯二甲酸晶体; 和（5）干燥，粉碎步骤，其中将洗涤的对苯二甲酸晶体干燥并粉碎。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式