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    • 2. 发明授权
    • Process for making polyethylene terephthalate
    • 制造聚对苯二甲酸乙二醇酯的方法
    • US08901271B2
    • 2014-12-02
    • US13391432
    • 2010-08-17
    • Munif Al-MunifMummaneni Venkateswara RaoZahir BashirSuresh Padmanabhan
    • Munif Al-MunifMummaneni Venkateswara RaoZahir BashirSuresh Padmanabhan
    • C08G63/00C08G63/85
    • C08G63/85
    • The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 6 mol % comonomer, using a mixed metal catalyst system and comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form PET and EG, wherein the catalyst system substantially consists of 70-160 ppm of Sb-compound, 20-70 ppm of Zn-compound, and 0.5-20 ppm of Ti-glycolate as active components (ppm metal based on PET). With this process that applies reduced amount of metal catalyst components PET can be obtained with high productivity, which polyester shows favorable color and optical clarity, also if recycling of EG is applied within the process.
    • 本发明涉及使用混合金属催化剂体系从乙二醇(EG),纯化对苯二甲酸(PTA)和任选多达6mol%的共聚单体制备聚对苯二甲酸乙二醇酯(PET)的方法,包括以下步骤:a)酯化EG 和PTA以形成对二醇二乙二醇酯和低聚物(DGT),和b)熔融相缩聚DGT以形成PET和EG,其中催化剂体系基本上由70-160ppm的Sb-化合物,20-70ppm的Zn化合物 ,和0.5-20ppm的作为活性成分的Ti-羟乙酸酯(基于PET的ppm金属)。 通过该方法可以减少金属催化剂组分的量,可以以高生产率获得PET,该聚酯显示有利的颜色和光学透明度,以及在该方法中应用EG的再循环。
    • 3. 发明申请
    • PROCESS FOR MAKING POLYETHYLENE TEREPHTHALATE
    • 制备聚乙烯三烯酸的方法
    • US20120161358A1
    • 2012-06-28
    • US13391432
    • 2010-08-17
    • Munif Al-MunifMummaneni Venkateswara RaoZahir BashirSuresh Padmanabhan
    • Munif Al-MunifMummaneni Venkateswara RaoZahir BashirSuresh Padmanabhan
    • C08G63/78C08G63/80B29C71/02C08G63/85
    • C08G63/85
    • The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 6 mol % comonomer, using a mixed metal catalyst system and comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form PET and EG, wherein the catalyst system substantially consists of 70-160 ppm of Sb-compound, 20-70 ppm of Zn-compound, and 0.5-20 ppm of Ti-glycolate as active components (ppm metal based on PET). With this process that applies reduced amount of metal catalyst components PET can be obtained with high productivity, which polyester shows favourable colour and optical clarity, also if recycling of EG is applied within the process.
    • 本发明涉及使用混合金属催化剂体系从乙二醇(EG),纯化对苯二甲酸(PTA)和任选多达6mol%的共聚单体制备聚对苯二甲酸乙二醇酯(PET)的方法,包括以下步骤:a)酯化EG 和PTA以形成对二醇二乙二醇酯和低聚物(DGT),和b)熔融相缩聚DGT以形成PET和EG,其中催化剂体系基本上由70-160ppm的Sb-化合物,20-70ppm的Zn化合物 ,和0.5-20ppm的作为活性成分的Ti-羟乙酸酯(基于PET的ppm金属)。 通过该方法可以减少金属催化剂组分的量,可以以高生产率获得PET,该聚酯显示有利的颜色和光学透明度,以及在该方法中应用EG的再循环。
    • 4. 发明申请
    • PROCESS FOR MAKING POLYETHYLENE TEREPHTHALATE
    • 制备聚乙烯三烯酸的方法
    • US20120071625A1
    • 2012-03-22
    • US13256437
    • 2010-03-10
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • C08G63/183
    • C08G63/82C08G63/83C08G63/866
    • The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 30 mol % comonomer, using a catalyst system essentially consisting of antimony—(Sb), zinc—(Zn) and phosphorous—(P) compounds, comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form polyester and EG1 wherein the Sb- and P-compounds are added in step a) and the Zn-compound is added after step a). With this process PET can be obtained that shows favourable colour and optical clarity, also if recycling of EG is applied in the process, and a relatively low rate of acetaldehyde re-generation during melt-processing.
    • 本发明涉及一种由乙二醇(EG),纯对苯二甲酸(PTA)和任选的至多30mol%共聚单体制备聚对苯二甲酸乙二醇酯(PET)的方法,该催化剂体系主要由锑 - (Sb),锌 - (Zn)和磷 - (P)化合物,包括以下步骤:a)酯化EG和PTA以形成对二醇二乙二醇酯和低聚物(DGT),和b)熔融相缩聚DGT以形成聚酯和EG1,其中Sb-和P - 化合物在步骤a)中加入,并且在步骤a)之后加入Zn化合物。 通过该方法,可以获得显示有利的颜色和光学透明度的PET,以及在该方法中应用EG的再循环以及在熔融加工期间相对较低的乙醛再生速率。
    • 5. 发明授权
    • Process for making polyethylene terephthalate
    • 制造聚对苯二甲酸乙二醇酯的方法
    • US08859713B2
    • 2014-10-14
    • US13256437
    • 2010-03-10
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • Mummaneni Venkateswara RaoMunif Al-MunifZahir Bashir
    • C08G63/00C08G63/82C08G63/02C08G63/86C08G63/83
    • C08G63/82C08G63/83C08G63/866
    • The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 30 mol % comonomer, using a catalyst system essentially consisting of antimony—(Sb), zinc—(Zn) and phosphorous—(P) compounds, comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form polyester and EG1 wherein the Sb- and P-compounds are added in step a) and the Zn-compound is added after step a). With this process PET can be obtained that shows favorable color and optical clarity, also if recycling of EG is applied in the process, and a relatively low rate of acetaldehyde regeneration during melt-processing.
    • 本发明涉及一种由乙二醇(EG),纯对苯二甲酸(PTA)和任选的至多30mol%共聚单体制备聚对苯二甲酸乙二醇酯(PET)的方法,该催化剂体系主要由锑 - (Sb),锌 - (Zn)和磷 - (P)化合物,包括以下步骤:a)酯化EG和PTA以形成对二醇二乙二醇酯和低聚物(DGT),和b)熔融相缩聚DGT以形成聚酯和EG1,其中Sb-和P - 化合物在步骤a)中加入,并且在步骤a)之后加入Zn化合物。 通过该方法,可以获得显示有利的颜色和光学透明度的PET,并且在该方法中应用EG的再循环以及在熔融加工期间相对较低的乙醛再生速率。