CN106674278A - 一种三苯基氧膦废渣中的三苯基膦回收工艺 - Google Patents
一种三苯基氧膦废渣中的三苯基膦回收工艺 Download PDFInfo
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- FIQMHBFVRAXMOP-UHFFFAOYSA-N triphenylphosphane oxide Chemical compound C=1C=CC=CC=1P(C=1C=CC=CC=1)(=O)C1=CC=CC=C1 FIQMHBFVRAXMOP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000002699 waste material Substances 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 19
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- ZDHXKXAHOVTTAH-UHFFFAOYSA-N trichlorosilane Chemical compound Cl[SiH](Cl)Cl ZDHXKXAHOVTTAH-UHFFFAOYSA-N 0.000 claims abstract description 14
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- KWEKXPWNFQBJAY-UHFFFAOYSA-N (dimethyl-$l^{3}-silanyl)oxy-dimethylsilicon Chemical compound C[Si](C)O[Si](C)C KWEKXPWNFQBJAY-UHFFFAOYSA-N 0.000 description 1
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- 239000002253 acid Substances 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
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- QBERHIJABFXGRZ-UHFFFAOYSA-M rhodium;triphenylphosphane;chloride Chemical compound [Cl-].[Rh].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 QBERHIJABFXGRZ-UHFFFAOYSA-M 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/50—Organo-phosphines
- C07F9/5022—Aromatic phosphines (P-C aromatic linkage)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
本发明公开了一种三苯基氧膦废渣中的三苯基膦回收工艺,它将三苯基氧膦废渣、碱、有机溶剂1投入反应釜中,搅拌均匀后升温到60‑70℃,开始滴加三氯氢硅,控制滴加温度在70‑75℃,滴加完成后保温反应至反应完成,将反应液降温至10℃以下滴加水,滴完后升温至15‑25℃反应,过滤,有机层控制60℃以下减压脱溶,脱溶完成后,趁热加入有机溶剂2,搅拌降温至0℃,保温0.8‑1.2小时,放料离心,得到白色的三苯基膦晶体。本发明的工艺步骤更简单、反应条件温和、生产周期短、原料转化率高、成本低,且大大降低了劳动操作与能耗;且其原料转化率高,合成的产品质量好、收率高、后处理方便,适合工业化生产。
Description
技术领域
本发明属于化工废料回收技术领域,具体涉及一种三苯基氧膦废渣中的三苯基膦回收工艺。
背景技术
三苯基膦广泛应用于有机合成中,而且也是重要的化工原料。它是当代石油化工、精细化工生产中所用均相催化剂的重要配体,如烯烃均相催化加氢的威金森催化剂、链烯烃聚合催化剂、线性丁烯加氢重整催化剂、聚脉催化剂、酚的氯化催化剂等。此外,三苯基膦还可作为促进剂,如有机化合物加氢促进剂、环氧树脂硬化促进剂;作热稳定剂,如玻纤增强聚酞胺模塑料的热稳定剂,芳香族聚酷树脂的耐热性改进剂,聚碳酸酷的热稳定剂;作光稳定剂;橡胶抗自氧剂;润滑油(脂)抗氧剂。
据文献报道[Kuroboshi M,Tetrahedron,2011,67:5825-5831],三苯基膦的合成方法主要有以下几种:(1)Grignard试剂法,以溴苯和金属镁反应先形成Grignard试剂,再与三氯化磷偶联获得;(2)Friedel-Crafts法,以三氯化磷和苯和硫磺在无水三氯化铝的催化下发生Friedel-Crafts反应生成硫代三苯基膦,再以铁粉或锌粉高温200 ℃左右还原得三苯基膦;(3)金属钠法,氯苯和金属钠为原料,先反应生成苯基钠中间体,再立即与三氯化磷反应生成三苯基膦;(4)是以三苯基氧膦为原料电解还原法获得三苯基膦。Grignard试剂法和Friedel-Crafts法成本高,生产周期长。现在主流工艺采用金属钠法,虽然操作可靠,污染轻,但安全隐患大,危险性高。三苯基氧膦还原法是基于三苯基膦再生技术的合成方法,因此具有明显的工业应用价值,经济效益明显。文献[Thasan,R. Indian Pat.,2002DE00793,2007-4-27]以乙腈,苯为溶剂经电化学还原三苯基氧膦,收率只为71%,且能耗较高。文献[Berthod,M.Synlett, 2007,1545-1548]以1,1,3,3-四甲基二硅氧烷,钛酸异丙酯进行还原,收率100%,但所用试剂价格昂贵,成本高,不适用于大规模工业生产。专利[US4249023]以光气与三苯基氧膦反应制备出二氯三苯基膦三氧甲烷络合物,再高压以氢气还原,收率80%,需要用要剧毒化合物及高压反应,工业生产同样存在较大安全隐患。
发明内容
本发明的目的是针对工业上Wittig、Staudinger反应以及 Ph3PCl2在转化醇为氯代烃的过程中反应产生的三苯基氧膦固废,该类固废纯度较低,提纯需消耗大量溶剂且回收率较低,提纯后的三苯基氧膦工业用途较少,大部分也需还原为三苯基膦,本发明可实现直接将纯度较低的三苯基氧膦一步法还原为三苯基膦,纯度大于99%,可直接作为商品三苯基膦出售。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于将三苯基氧膦废渣、碱、有机溶剂1投入反应釜中,搅拌均匀后升温到60-70℃,开始滴加三氯氢硅,控制滴加温度在70-75℃,滴加完成后保温反应至取样检测三苯基氧膦反应完成,将反应液降温至10℃以下,并控制温度10℃以下开始滴加水,滴完后升温至15-25℃反应,过滤除去不溶物,有机层控制60℃以下减压脱溶,脱溶完成后,趁热加入有机溶剂2,搅拌降温至0℃,保温0.8-1.2小时,放料离心,得到白色的三苯基膦晶体,收率≥85%,HPLC≥99%。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于碱、三氯氢硅和三苯基氧膦的投料摩尔比为1.4~1.6: 1.4~1.6:1。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于有机溶剂1为正己烷、环己烷、正庚烷、苯、甲苯或二甲苯中的任意一种,优选为甲苯和二甲苯。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于有机溶剂2为甲醇、乙醇、正丙醇、异丙醇、正丁醇、异丁醇中的任意一种,优选为甲醇和乙醇。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于三苯基氧膦废渣水份含量小于0.5%,HPLC纯度大于80%。
所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于碱为碳酸钾、碳酸钠、吡啶、N,N-二甲基苯胺、二异丙基乙胺、或三乙胺中的任意一种,优选为二异丙基乙胺和三乙胺。本发明的合成方程式如下:
,
其中,I为三苯基氧膦;II的碱为有机碱或无机碱;III为三氯氢硅。
通过采用上述技术,与现有技术相比,本发明的有益效果如下:
本发明以三苯基氧膦废渣为原料,无需分离提纯,一步反应即可将其转化为纯度99%以上的三苯基膦,收率大于85%,与现有的电解法以及光气-红磷还原法相比,本发明工艺步骤更简单、反应条件温和、生产周期短、原料转化率高、成本低,且大大降低了劳动操作与能耗;而且本发明原料转化率高,合成的产品质量好、收率高、后处理方便,适合工业化生产。
具体实施方式
以下所述仅为本发明的较佳实施例,并不因此而限定本发明的保护范围。
实施例1:将三苯基氧膦废渣(27.8g)和三乙胺(15.2g,0.15mol)和120mL甲苯投入反应釜中;搅拌均匀后,升温至65℃,开始滴加三氯氢硅(20.3g,0.15mol),滴加温度控制70-75℃,1小时左右滴完;滴完后保温2小时,取样检测原料反应完全后降温至10℃以下;控制温度10℃以下滴加100ml水水解过量的三氯氢硅,水解完成后升温至20℃保温0.5小时,静置0.5小时分层,过滤除去不溶物,有机层控制60℃以内减压脱溶,不出液后趁热加入25ml甲醇,降温至0℃,过滤结晶,母液留待套用;烘干得白色的三苯基膦晶体22.8g,收率86.9%,HPLC含量99.2%。
实施例2:将三苯基氧膦废渣(27.8g)和二异丙基乙胺(18.1g,0.14mol)和120mL二甲苯投入反应釜中;搅拌均匀后,升温至65℃,开始滴加三氯氢硅(18.9g,0.14mol),滴加温度控制70-75℃,1小时左右滴完;滴完后保温2小时,取样检测原料反应完全后降温至10℃以下;控制温度10℃以下滴加100ml水水解过量的三氯氢硅,水解完成后升温至20℃保温0.5小时,静置0.5小时分层,过滤除去不溶物,有机层控制60℃以内减压脱溶,不出液后趁热加入25ml乙醇,降温至0℃,过滤结晶,母液留待套用;烘干得白色的三苯基膦晶体21.2g,收率80.8%,HPLC含量99.3%。
实施例3:将三苯基氧膦废渣(27.8g)和碳酸钠(15.9g,0.15mol)和120 mL正己烷投入反应釜中;搅拌均匀后,升温至65℃,开始滴加三氯氢硅(21.7g,0.16mol),滴加温度控制70-75℃,1小时左右滴完;滴完后保温2小时,取样检测原料反应完全后降温至10℃以下;控制温度10℃以下滴加100ml水水解过量的三氯氢硅,水解完成后升温至20℃保温0.5小时,静置0.5小时分层,过滤除去不溶物,有机层控制60℃以内减压脱溶,不出液后趁热加入25ml乙醇,降温至0℃,过滤结晶,母液留待套用;烘干得白色的三苯基膦晶体18.4g,收率70.2%,HPLC含量99.1%。
实施例4:将三苯基氧膦废渣(27.8g)和三乙胺(16.2g,0.16mol)和120mL二甲苯投入反应釜中;搅拌均匀后,升温至65℃,开始滴加三氯氢硅(21.7g,0.16mol),滴加温度控制70-75℃,1小时左右滴完;滴完后保温2小时,取样检测原料反应完全后降温至10℃以下;控制温度10℃以下滴加100ml水水解过量的三氯氢硅,水解完成后升温至20℃保温0.5小时,静置0.5小时分层,过滤除去不溶物,有机层控制60℃以内减压脱溶,不出液后趁热加入25ml甲醇,降温至0℃,过滤结晶,母液留待套用;烘干得白色的三苯基膦晶体23.0g,收率87.7%,HPLC含量99.5%。
使用本发明回收三苯基膦,工艺步骤更简单、反应条件温和、生产周期短、原料转化率高、成本低,且大大降低了劳动操作与能耗;而且本发明原料转化率高,回收的产品质量好、收率高、后处理方便,适合工业化生产。
Claims (6)
1.一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于将三苯基氧膦废渣、碱、有机溶剂1投入反应釜中,搅拌均匀后升温到60-70℃,开始滴加三氯氢硅,控制滴加温度在70-75℃,滴加完成后保温反应至取样检测三苯基氧膦反应完成,将反应液降温至10℃以下,并控制温度10℃以下开始滴加水,滴完后升温至15-25℃反应,过滤除去不溶物,有机层控制60℃以下减压脱溶,脱溶完成后,趁热加入有机溶剂2,搅拌降温至0℃,保温0.8-1.2小时,放料离心,得到白色的三苯基膦晶体,收率≥85%,HPLC≥99%。
2.根据权利要求1所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于碱、三氯氢硅和三苯基氧膦的投料摩尔比为1.4~1.6: 1.4~1.6:1。
3.根据权利要求1所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于有机溶剂1为正己烷、环己烷、正庚烷、苯、甲苯或二甲苯中的任意一种,优选为甲苯和二甲苯。
4.根据权利要求1所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于有机溶剂2为甲醇、乙醇、正丙醇、异丙醇、正丁醇、异丁醇中的任意一种,优选为甲醇和乙醇。
5.根据权利要求1所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于三苯基氧膦废渣水份含量小于0.5%,HPLC纯度大于80%。
6.根据权利要求1所述的一种三苯基氧膦废渣中的三苯基膦回收工艺,其特征在于碱为碳酸钾、碳酸钠、吡啶、N,N-二甲基苯胺、二异丙基乙胺、或三乙胺中的任意一种,优选为二异丙基乙胺和三乙胺。
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CN111514150A (zh) * | 2020-05-22 | 2020-08-11 | 清华大学 | Tppo在抑制fpp导致的细胞死亡及相应再灌注损伤中的应用 |
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