精对苯二甲酸产品和方法标准的研究进展
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摘要
精对苯二甲酸(PTA)是一种重要的化工原料,主要用于生产聚对苯二甲酸乙二醇酯(PET)及后续产品,如纤维、瓶片、薄膜以及工程塑料,其质量品质和标准对下游聚酯产品稳定生产和性能具有重要影响,受到行业越来越多的关注。本文概述了国内工业用PTA技术标准的发展历程,介绍了PTA行业标准的现状、主要技术内容以及存在的问题,重点解析了PTA国家标准包括1项产品标准、7项配套方法标准的研究背景,与行业标准相比所作的重要技术调整和技术水平的提升;介绍了PTA国际标准化研究的进展,特别是近年来由中国石化主导制定的7项PTA系列ASTM标准取得的突破性成果;在此基础上,对未来PTA标准技术的研究进行了思考,提出了加强微量杂质控制、关注影响高端聚酯产品质量控制指标等建议。
Pure terephthalic acid(PTA)is an important chemical raw material mainly for the production of polyethylene terephthalate(PET,referred to as polyester)and subsequent products such as fiber,bottle,film and engineering plastics.The quality and standard of PTA are the critical factors of the stable production and performance of the downstream polyester products,which have received more and more attentions from the industry.This essay reviews the development of China technical standards for PTA,covering the current status,technical content and existing problems.The research background of national standards for PTA with a product and seven supporting methods is analyzed as well as the adjustment of key technology and the promotion of technical level in comparison with industry standards.The progress of the international standardization research on PTA, especially the breakthrough of the seven series ASTM standards for PTA developed under the leading efforts of SINOPEC in recent years is also introduced.On the above foundations,the future investigation on the PTA standard technology is considered,and some suggestions are put forward to strengthen the control of trace impurities and focus the quality control indexes of high-end polyester products.
Pure terephthalic acid(PTA)is an important chemical raw material mainly for the production of polyethylene terephthalate(PET,referred to as polyester)and subsequent products such as fiber,bottle,film and engineering plastics.The quality and standard of PTA are the critical factors of the stable production and performance of the downstream polyester products,which have received more and more attentions from the industry.This essay reviews the development of China technical standards for PTA,covering the current status,technical content and existing problems.The research background of national standards for PTA with a product and seven supporting methods is analyzed as well as the adjustment of key technology and the promotion of technical level in comparison with industry standards.The progress of the international standardization research on PTA, especially the breakthrough of the seven series ASTM standards for PTA developed under the leading efforts of SINOPEC in recent years is also introduced.On the above foundations,the future investigation on the PTA standard technology is considered,and some suggestions are put forward to strengthen the control of trace impurities and focus the quality control indexes of high-end polyester products.
引文
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