JP7451527B2 - 高純度トリフルオロヨードメタンを生成するためのプロセス - Google Patents
高純度トリフルオロヨードメタンを生成するためのプロセス Download PDFInfo
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Description
等式1: CH3I+XOH→CH3OH+XI、
式中、XIが、ヨウ化カリウム、ヨウ化ナトリウム、又はヨウ化リチウムである。メタノール及びヨウ化アルカリ塩は、塩基性水溶液に容易に可溶性であり、したがってプロセスストリームから容易に除去される。
等式2: CF3I+2XOH→CF2O+XI+XF+H2O
式中、XIが、ヨウ化カリウム、ヨウ化ナトリウム、又はヨウ化リチウムであり、XFが、フッ化カリウム、フッ化ナトリウム、又はフッ化リチウムである。したがって、塩基性水溶液中のアルカリ金属水酸化物の濃度を厳密に制御して、このCF3Iの分解を制限し、精製プロセスにおけるCF3Iの収率を維持する必要がある。
この実施例では、上述の等式1及び2に従った粗CF3Iに対するアルカリ金属水酸化物濃度の影響を実証する。99.88GC面積%のCF3I、0.08GC面積%のCH3I、及び0.04GC面積%の他の有機不純物からなる100gの量の粗出発物質を、室温で6つの150mlシリンダの各々に充填した。6つのシリンダを、粗出発物質で充填する前に排気した。0重量%~20重量%の変動する濃度の水酸化カリウムで、6つの異なる試験溶液を調製した。6つの試験溶液の各々のうちの異なる1つを、50mlの量で6つのシリンダの各々に添加した。試料シリンダの平均圧力は、室温で70psigであった。6つのシリンダを室温で5日間振盪させた。5日間は、典型的なプロセス接触時間よりもはるかに長いが、粗出発物質に対する水酸化カリウムの様々な濃度の相対的な影響の明確な指標を提供するために選択した。
実施例2:粗CF3Iに対するアルカリ金属炭酸塩濃度の影響
実施例3:アルミナを使用した粗CF3Iからの酸不純物及び水の除去
実施例4:粗CF3Iの蒸留
実施例5:粗CF3Iの精製プロセス
態様
本発明は以下の態様を含む。
[1]
トリフルオロヨードメタンを精製するための方法であって、
トリフルオロヨードメタン、有機不純物、及び酸不純物を含むプロセスストリームを提供することと、
前記プロセスストリームを塩基性水溶液と反応させることであって、前記塩基性水溶液が、水、並びにアルカリ金属炭酸塩及びアルカリ金属水酸化物の群から選択される少なくとも1つの塩基を含む、反応させることと、
前記プロセスストリームから前記有機不純物の少なくとも一部を分離することと、を含む、方法。
[2]
前記反応工程において、前記少なくとも1つの塩基が、アルカリ金属炭酸塩を含む、[1]に記載の方法。
[3]
前記塩基性水溶液中の前記アルカリ金属炭酸塩の濃度が、約0.01重量%~約20重量%である、[2]に記載の方法。
[4]
前記アルカリ金属炭酸塩が、炭酸ナトリウムを含む、[2]に記載の方法。
[5]
前記反応工程において、前記少なくとも1つの塩基が、アルカリ金属水酸化物を含む、[1]に記載の方法。
[6]
前記塩基性水溶液中の前記アルカリ金属水酸化物の濃度が、約0.01重量%~約20重量%である、[5]に記載の方法。
[7]
前記反応工程の直後に前記プロセスストリームから前記水の少なくとも一部を除去するための追加の乾燥工程を更に含み、前記反応工程、前記乾燥工程、及び前記分離工程の後の前記プロセスストリームが、少なくとも約99重量%のトリフルオロヨードメタン、約50ppm未満のヨウ化メチル、約100ppm未満の水、及び約20ppm未満の酸不純物を含む、[1]~[6]のいずれか一項に記載の方法。
[8]
トリフルオロヨードメタンを精製するための方法であって、
トリフルオロヨードメタン、有機不純物、及び酸不純物を含むプロセスストリームを提供することと、
前記プロセスストリームを酸反応剤と接触させることと、
前記プロセスストリームから前記有機不純物の少なくとも一部を分離することと、を含む、方法。
[9]
前記酸反応剤が、アルミナ吸着剤を含む、[8]に記載の方法。
[10]
前記接触工程の直後に前記プロセスストリームから前記水の少なくとも一部を除去するための追加の乾燥工程を更に含み、前記接触工程、前記乾燥工程、及び前記分離工程の後の前記プロセスストリームが、少なくとも約99重量%のトリフルオロヨードメタン、約50ppm未満のヨウ化メチル、約100ppm未満の水、及び約20ppm未満の酸不純物を含む、[8]又は[9]のいずれかに記載の方法。
Claims (9)
- トリフルオロヨードメタンを精製するための方法であって、
トリフルオロヨードメタン、有機不純物、及び酸不純物を含むプロセスストリームを提供することと、
前記プロセスストリームを塩基性水溶液と反応させることであって、前記塩基性水溶液が、水、並びにアルカリ金属炭酸塩及びアルカリ金属水酸化物の群から選択される少なくとも1つの塩基を含む、反応させることと、
前記プロセスストリームから前記有機不純物の少なくとも一部を分離することと、を含み、
塩基性水溶液の総重量の百分率としてのアルカリ金属炭酸塩の濃度は、0.5重量%~5重量%であり、塩基性水溶液の総重量の百分率としてのアルカリ金属水酸化物の濃度は、0.01重量%~5重量%である、方法。 - 前記反応工程において、前記少なくとも1つの塩基が、アルカリ金属炭酸塩を含む、請求項1に記載の方法。
- 前記塩基性水溶液中の前記アルカリ金属炭酸塩の濃度が、0.5重量%~5重量%である、請求項2に記載の方法。
- 前記アルカリ金属炭酸塩が、炭酸ナトリウムを含む、請求項1~3のいずれかに記載の方法。
- 前記反応工程において、前記少なくとも1つの塩基が、アルカリ金属水酸化物を含む、請求項1に記載の方法。
- 前記塩基性水溶液中の前記アルカリ金属水酸化物の濃度が、0.01重量%~5重量%である、請求項5に記載の方法。
- 前記塩基性水溶液中の前記アルカリ金属水酸化物の濃度が、0.5重量%~5重量%である、請求項6に記載の方法。
- 前記反応工程の直後に前記プロセスストリームから前記水の少なくとも一部を除去するための追加の乾燥工程を更に含み、前記反応工程、前記乾燥工程、及び前記分離工程の後の前記プロセスストリームが、少なくとも99重量%のトリフルオロヨードメタン、50ppm未満のヨウ化メチル、100ppm未満の水、及び20ppm未満の酸不純物を含む、請求項1~7のいずれかに記載の方法。
- 請求項1~8のいずれかに記載の方法に従ってトリフルオロヨードメタンを精製する工程を含む、トリフルオロヨードメタンを製造する方法。
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US11453631B2 (en) * | 2020-10-14 | 2022-09-27 | Honeywell International Inc. | Methods for removal HI/I2/HI3 from trifluoroacetyl iodide (TFAI) feedstock and pyrolysis reactor effluent |
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JP2008179602A (ja) | 2006-10-16 | 2008-08-07 | Honeywell Internatl Inc | トリフルオロヨードメタンとペンタフルオロヨードエタンを製造するための触媒プロモーター |
CN108675914A (zh) | 2018-06-19 | 2018-10-19 | 宇极(廊坊)新材料有限公司 | 一种制备高纯三氟碘甲烷的方法 |
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KR100535788B1 (ko) * | 2002-11-20 | 2005-12-09 | 김규성 | 트리플루오르요오드메탄의 제조방법 및 그 장치와 촉매 |
US8058486B2 (en) | 2004-04-29 | 2011-11-15 | Honeywell International Inc. | Integrated process to produce 2,3,3,3-tetrafluoropropene |
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US20200172457A1 (en) | 2020-06-04 |
US10941091B2 (en) | 2021-03-09 |
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WO2020117745A1 (en) | 2020-06-11 |
EP3891114A1 (en) | 2021-10-13 |
CN113286774B (zh) | 2024-10-29 |
MX2021006220A (es) | 2021-08-11 |
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