CN115572382A - 一种无锑的聚酯熔体及其制备方法 - Google Patents
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- 238000005886 esterification reaction Methods 0.000 claims description 14
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 10
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- MSYNCHLYGJCFFY-UHFFFAOYSA-B 2-hydroxypropane-1,2,3-tricarboxylate;titanium(4+) Chemical compound [Ti+4].[Ti+4].[Ti+4].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O MSYNCHLYGJCFFY-UHFFFAOYSA-B 0.000 claims description 4
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 3
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- 239000003963 antioxidant agent Substances 0.000 claims description 3
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- 229940011182 cobalt acetate Drugs 0.000 claims description 3
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 239000004246 zinc acetate Substances 0.000 claims description 3
- KRXBVZUTZPDWQI-UHFFFAOYSA-N ethane-1,2-diol;titanium Chemical compound [Ti].OCCO KRXBVZUTZPDWQI-UHFFFAOYSA-N 0.000 claims description 2
- -1 titanium isopropyl ester Chemical class 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 3
- 229910052787 antimony Inorganic materials 0.000 abstract description 8
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 3
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- WSXIMVDZMNWNRF-UHFFFAOYSA-N antimony;ethane-1,2-diol Chemical compound [Sb].OCCO WSXIMVDZMNWNRF-UHFFFAOYSA-N 0.000 description 2
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- JVLRYPRBKSMEBF-UHFFFAOYSA-K diacetyloxystibanyl acetate Chemical compound [Sb+3].CC([O-])=O.CC([O-])=O.CC([O-])=O JVLRYPRBKSMEBF-UHFFFAOYSA-K 0.000 description 1
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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Abstract
本发明公开了一种无锑的聚酯熔体及其制备方法。锑含量从220ppm降到检测为0(低于1ppm以下),降低了聚酯聚酯纤维中重金属对人体的伤害。
Description
技术领域
本发明属于纤维制造技术领域,涉及一种无锑的聚酯熔体及其制备方法。
背景技术
聚对苯二甲酸乙二醇酯(PET)具有高弹性模量和断裂强度,回弹性适中,热定型优异,耐热耐光性好以及耐酸碱耐腐蚀性等一系列优良性能,广泛应用于服装、家纺、医药用品等领域。
目前,国内大多数聚酯纤维生产所采用的催化剂为醋酸锑、三氧化二锑、乙二醇锑中的一种或者几种。锑作为一种重金属元素,在自然界中与剧毒的砷共生,长期接触采用含锑聚酯切片制备的饮料瓶及非食品包装材料,会对人类的健康造成严重的威胁。另外,采用锑系催化剂制备的聚酯纤维在印染工艺中,高温会使锑从聚酯纤维中析出,造成工艺水的污染,导致循环工艺水中最终的锑含量超过国家有关的标准。而钛系催化剂以其较高的催化活性、相对适中的价格、对环境友好对人体无害等特点将成为替代锑系的催化剂的最佳选择。
为降低重金属锑对人体的影响,亟需开发一种新的无锑熔体生产工艺。
发明内容
本发明的目的是克服现有技术的不足,提供一种无锑的聚酯熔体及其制备方法。
为了达到上述目的,本发明采用了下列技术方案:
一种无锑的聚酯熔体的制备方法,包括如下步骤:
A、将对苯二甲酸、乙二醇、催化助剂、钛系催化剂按照一定的比例加入浆料混合罐,分别调配成酯化反应需要的浆料;
B、将步骤A中调配好的浆料,按一定的流量加入到酯化一釜,在250℃-270℃的温度,0.05MPa-0.06Mpa绝对压力下,反应60-70分钟;酯化一釜的齐聚物流入酯化二釜,在250℃-270℃的温度下,0.009MPa-0.012MPa压力下反应,反应50-60分钟;
C、将步骤B制得的齐聚物送入缩聚一釜,在270℃-280℃温度,1500Pa-2000Pa绝对压力下,反应时间70-80分钟,得到预聚物;预聚物送入到终缩聚反应釜,在270℃-280℃温度,100Pa-200Pa绝对压力下,反应时间60-70分钟,得到聚酯熔体。
作为优选方式,所述步骤A中,对苯二甲酸和乙二醇的质量比为1:0.44-0.55。
作为优选方式,钛系催化剂为柠檬酸钛、钛酸异丙酯或乙二醇钛中的一种或多种。
作为优选方式,所述步骤A中,所述步骤A中,催化助剂为20ppm~200ppm醋酸钴、5~15ppm醋酸锌,5~10ppm镁铝滑石粉,20~40ppm抗氧剂。
本发明还公开了一种根据上述制备方法制备的聚酯熔体。
本发明具有以下优点:
新无锑聚酯生产工艺的降低了熔体中重金属含量,降低了以乙二醇锑为催化加的聚酯熔体中重金属对人体的伤害。随着人们对健康要求的不断提高,无锑聚酯熔体生产工艺是大势所趋,必将淘汰对人体健康影响大的工艺。从生产测试的结果,此无锑生产工艺对生产成本没有增加。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1:
一种无锑的聚酯熔体的制备方法,包括如下步骤:
对苯二甲酸和乙二醇的质量比为1:0.44~0.55,催化助剂、钛系催化剂(柠檬酸钛、钛酸异丙酯、乙二醇钛)60PPM~80PPM进入浆料混合罐,调配成酯化反应需要的浆料。催化助剂包括醋酸钴(20ppm~200ppm),醋酸锌(5~15ppm),镁铝滑石粉(5~10ppm),抗氧剂AN1425(20~40ppm)。柠檬酸钛、钛酸异丙酯、乙二醇钛质量比为6:2:2。
调配好的浆料,按与产量匹配的流量进入到酯化一釜,在250℃~270℃的高温下,在绝压0.05MPa~0.06Mpa的压力下进行反应,反应时间在60~70分钟,酯化率达到90%。酯化一釜的齐聚物通过重力流入酯化二釜,在250℃~270℃的高温下,压力0.009MPa~0.012MPa下反应,反应时间在50~60分钟,反应率达到96%。
酯化二釜完成后的齐聚物用泵送入缩聚一釜,温度在270℃~280℃,真空在绝压1500Pa~2000Pa的条件下,反应时间70~80分钟,完成第一缩聚反应,得到预聚物,反应率达到99.5%。预聚物通过泵送入到终缩聚反应釜(高粘缩聚釜和低粘缩聚釜),温度在270℃~280℃,真空在绝压100Pa~200Pa的条件下,反应时间60~70分钟,得到熔体,反应率达到99.8%。
实施例2:
外送SGS的产品检测结果Sb含量为0(小于1ppm)。(检测方法:SGS内部方法(GZTCCHEM-TOP-004-09,参考US EPA方法3052:1996),采用ICP-MS进行分析)。
本发明并不局限于前述的具体实施方式。本发明扩展到任何在本说明书中披露的新特征或任何新的组合,以及披露的任一新的方法或过程的步骤或任何新的组合。
Claims (5)
1.一种无锑的聚酯熔体的制备方法,其特征在于,包括如下步骤:
A、将对苯二甲酸、乙二醇、催化助剂、钛系催化剂按照一定的比例加入浆料混合罐,分别调配成酯化反应需要的浆料;
B、将步骤A中调配好的浆料,按一定的流量加入到酯化一釜,在250℃-270℃的温度,0.05MPa-0.06Mpa绝对压力下,反应60-70分钟;酯化一釜的齐聚物流入酯化二釜,在250℃-270℃的温度下,0.009MPa-0.012MPa压力下反应,反应50-60分钟;
C、将步骤B制得的齐聚物送入缩聚一釜,在270℃-280℃温度,1500Pa-2000Pa绝对压力下,反应时间70-80分钟,得到预聚物;预聚物送入到终缩聚反应釜,在270℃-280℃温度,100Pa-200Pa绝对压力下,反应时间60-70分钟,得到聚酯熔体。
2.根据权利要求1所述的一种无锑的复合纺中空聚酯纤维的制备方法,其特征在于:所述步骤A中,对苯二甲酸和乙二醇的质量比为1:0.44-0.55。
3.根据权利要求1所述的一种无锑的复合纺中空聚酯纤维的制备方法,其特征在于:钛系催化剂为柠檬酸钛、钛酸异丙酯或乙二醇钛中的一种或多种。
4.根据权利要求1所述的一种无锑的复合纺中空聚酯纤维的制备方法,其特征在于:所述步骤A中,所述步骤A中,催化助剂为20ppm~200ppm醋酸钴、5~15ppm醋酸锌,5~10ppm镁铝滑石粉,20~40ppm抗氧剂。
5.一种根据权利要求1-4任一所述制备方法制备的聚酯熔体。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102731753A (zh) * | 2012-06-29 | 2012-10-17 | 浙江古纤道新材料股份有限公司 | 一种低重金属含量聚酯切片的生产工艺 |
CN103554452A (zh) * | 2013-11-04 | 2014-02-05 | 中国石油化工股份有限公司 | 环保型无锑膜用聚酯的制备方法 |
CN112724390A (zh) * | 2020-12-29 | 2021-04-30 | 浙江恒逸石化有限公司 | 一种无锑聚酯熔体制备系统及制备无锑聚酯细旦fdy纤维的方法 |
CN113106562A (zh) * | 2021-03-18 | 2021-07-13 | 浙江恒逸石化有限公司 | 一种无锑dty聚酯纤维的制备方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN102731753A (zh) * | 2012-06-29 | 2012-10-17 | 浙江古纤道新材料股份有限公司 | 一种低重金属含量聚酯切片的生产工艺 |
CN103554452A (zh) * | 2013-11-04 | 2014-02-05 | 中国石油化工股份有限公司 | 环保型无锑膜用聚酯的制备方法 |
CN112724390A (zh) * | 2020-12-29 | 2021-04-30 | 浙江恒逸石化有限公司 | 一种无锑聚酯熔体制备系统及制备无锑聚酯细旦fdy纤维的方法 |
CN113106562A (zh) * | 2021-03-18 | 2021-07-13 | 浙江恒逸石化有限公司 | 一种无锑dty聚酯纤维的制备方法 |
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