PET decomposition in supercritical water to recover telephthalic acid
PET在超临界水中分解回收对苯二甲酸
基本信息
- 批准号:07555232
- 负责人:
- 金额:$ 9.09万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:1995
- 资助国家:日本
- 起止时间:1995 至 1996
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
For the development of a new process of PET decomposition in supercritical water to recover telephthalic acid wihch is a raw material for producing PET,some basic studies were conducted. First, mechanism of the reaction was studied by using a tube bomb reactor. Hydrolysis of PET to produce telephthalic acid and ethyleneglycol took place in both sub and supercritical water. In supercritical condition (673 K,40 MPa), PET could be decomposed in 5 min. The yield of telephthalic acid whose purity was 97% reached to 91% at the reaction time of 12.5 min. Reaction temperature influenced signifidantly the PET decomposition. At 573 K,it took around 90 min for the 90% of telephthalic acid recovery. Supercritical condition, the effect of pressure on the reaction was significant. With increasing reaction pressure, char formation could be suppressed. Carbon dioxide production during the PET decomposition which is probably due to the decarboxylation from telephthalic acid, has been also suppressed. Besides this fundamental study for the PET decomposition, development of slurry feeder was also conducted and thus the basis of the continuous reaction has established. We think the process of non catalytic hydrolysis of PET in supercritical water will be a promising method for the chemical recycle, since 1) this require no waste water treatment, 2) purification of terlephthalic acid can be done during the cooling process after the PET hydrolysis.
为了开发超临界水分解PET回收PET原料对苯二甲酸的新工艺,进行了一些基础研究。首先,利用管式炸弹反应器对反应机理进行了研究。PET水解生成对苯二甲酸和乙二醇在亚和超临界水中均可发生。在超临界条件下(673 K,40 MPa), PET可在5 min内分解。在12.5 min的反应条件下,纯度为97%的对苯二甲酸收率可达91%。反应温度对PET的分解有显著影响。在573k时,对苯二甲酸的回收率约为90%,耗时约90 min。在超临界条件下,压力对反应的影响是显著的。随着反应压力的增加,炭的形成受到抑制。PET分解过程中二氧化碳的产生也受到抑制,这可能是由于对苯二甲酸的脱羧作用。除了对PET分解进行基础性研究外,还进行了浆料给料机的研制,为连续化反应奠定了基础。我们认为PET在超临界水中的非催化水解工艺将是一种很有前途的化学回收方法,因为1)不需要处理废水,2)PET水解后的冷却过程可以对对苯二甲酸进行纯化。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
阿尻雅文ら: "超臨界水を反応溶媒とするPETの高速分解・テレフタール酸回収" 化学工学会誌. (1997)
Masafumi Asiri 等人:“使用超临界水作为反应溶剂快速分解 PET 并回收对苯二甲酸”,日本化学工程师学会杂志(1997 年)。
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- 影响因子:0
- 作者:
- 通讯作者:
Tadafumi Adschiri, Osamu Sato and Kunio Arai: ""Recovery of Terephthalic acid by Decomposition of PET in supercritical water"" J.Chem.Eng.jpn. (in press). (1997)
Tadafumi Adschiri、Osamu Sato 和 Kunio Arai:“通过在超临界水中分解 PET 来回收对苯二甲酸”J.Chem.Eng.jpn。
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AZIRI Tadafumi其他文献
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{{ truncateString('AZIRI Tadafumi', 18)}}的其他基金
Cellulose decomposition in supercritical water to recover chemicals
超临界水中的纤维素分解以回收化学品
- 批准号:
07455433 - 财政年份:1995
- 资助金额:
$ 9.09万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
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