CN108579808B - 一种用于合成四氢呋喃-3-甲醛的复合催化剂及使用其合成四氢呋喃-3-甲醛的方法 - Google Patents
一种用于合成四氢呋喃-3-甲醛的复合催化剂及使用其合成四氢呋喃-3-甲醛的方法 Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 70
- GSUBXIVOZXWGKF-UHFFFAOYSA-N oxolane-3-carbaldehyde Chemical compound O=CC1CCOC1 GSUBXIVOZXWGKF-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 13
- -1 Iron compound Chemical class 0.000 claims abstract description 14
- 239000010941 cobalt Substances 0.000 claims abstract description 12
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 11
- 150000004714 phosphonium salts Chemical group 0.000 claims abstract description 7
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- ARGCQEVBJHPOGB-UHFFFAOYSA-N 2,5-dihydrofuran Chemical compound C1OCC=C1 ARGCQEVBJHPOGB-UHFFFAOYSA-N 0.000 claims description 54
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 34
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 31
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims description 29
- 239000001257 hydrogen Substances 0.000 claims description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 12
- 238000004821 distillation Methods 0.000 claims description 11
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 8
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 7
- 150000002506 iron compounds Chemical class 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 6
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 claims description 2
- 229910021577 Iron(II) chloride Inorganic materials 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 2
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(III) nitrate Inorganic materials [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 125000003944 tolyl group Chemical group 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 abstract description 13
- 229910052703 rhodium Inorganic materials 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 12
- 238000007037 hydroformylation reaction Methods 0.000 description 10
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 8
- 229910017147 Fe(CO)5 Inorganic materials 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 4
- 239000003446 ligand Substances 0.000 description 4
- NHGXDBSUJJNIRV-UHFFFAOYSA-M tetrabutylammonium chloride Chemical compound [Cl-].CCCC[N+](CCCC)(CCCC)CCCC NHGXDBSUJJNIRV-UHFFFAOYSA-M 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000003426 co-catalyst Substances 0.000 description 2
- 150000001868 cobalt Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- WPWHSFAFEBZWBB-UHFFFAOYSA-N 1-butyl radical Chemical compound [CH2]CCC WPWHSFAFEBZWBB-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- OVUFERFKGZMJHQ-UHFFFAOYSA-N cobalt;phosphanylidenemethanone Chemical compound [Co].O=C=P OVUFERFKGZMJHQ-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013110 organic ligand Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明公开了一种用于合成四氢呋喃‑3‑甲醛的复合催化剂,包括钴簇化合物RCCo3(CO)9、铁化合物以及季铵盐R1 3R2NCl或季膦盐R1 3R2PCl。本发明还公开了使用该复合催化剂合成四氢呋喃‑3‑甲醛的方法。本发明既克服了传统钴基催化剂必须在高温高压下才能进行的缺点,反应条件温和,又解决了羰基铑催化剂价格昂贵的问题。
Description
技术领域
本发明涉及化学合成技术领域,具体涉及一种用于合成四氢呋喃-3-甲醛的复合催化剂,以及利用该催化剂合成四氢呋喃-3-甲醛的方法。
背景技术
烯烃氢甲酰化反应是合成有机中间体醛的重要途径,随着四氢呋喃-3-甲醛用途的不断扩大,2,5-二氢呋喃氢甲酰化合成四氢呋喃-3-甲醛的意义也愈加重大。催化剂是氢甲酰化技术路线的关键,主要有钴基催化剂和铑基催化剂两类,钴基催化剂活性不高、反应条件苛刻;铑基催化剂虽然价格昂贵,但活性高、反应条件温和,是研究的热点。
1938年Otto Roelen在研究F-T合成时,发现在Co催化剂和加热加压的条件下,乙烯和一氧化碳、氢气可以反应生成丙醛,这引起了研究者的极大兴趣。研究者对Co催化剂进行了全面研究,开发了第一代氢甲酰化催化剂,即羰基钴催化剂[HCo(CO)4],并于40年代后期应用与工业生产,目前仍占很大比重。由于钴基催化剂的有效成分HCo(CO)4容易分解,需要维持较高的合成气压力(20-30MPa),因此这种催化反应方法又称“高压钴法”。在这种情况下,必须在较高温度下才能保证适当的反应速率,致使工业生产条件异常苛刻,随着配位化学的迅速发展,有机配体开始应用于氢甲酰化催化剂中,有机膦配体被引入以显著降低反应压力。如羰基钴-膦配合物催化剂中的膦配体主要是三烷基膦,其中最著名的是以三正丁基膦为配体[HCo(CO)3P(n-C4H9)3]。但这种改性后的钴体系也会带来一些新问题,如活性下降、加氢副反应活性增大。
20世纪50年代中期,研究者发现在氢甲酰化反应中Rh的催化活性远远高于Co,未修饰的羰基铑催化剂的氢甲酰化活性是钴的102-104倍,Rh也是目前发现的活性最高的金属,且其配合物稳定性好,操作条件温和,加氢活性低,但是得到的产物的正异构比非常低,且铑为贵金属,世界范围储量仅为778t,加上其它领域(如高附加值的手性合成)对铑的需求量也在日益增加。由此带来的成本上的劣势远远超过了铑催化剂在催化活性上的优势,使得其很长一段时间没有工业化应用。因此,积极开发非贵金属催化剂在烯烃氢甲酰化反应中具有重要意义。
发明内容
本发明的目的在于克服现有技术的缺陷,提供一种用于合成四氢呋喃-3-甲醛的复合催化剂,既克服了传统贵金属催化剂存在的成本高、反应条件苛刻的问题,又提高了反应收率和选择性。
为了实现上述目的,本发明采取的技术方案如下:
一种用于合成四氢呋喃-3-甲醛的复合催化剂,包括钴簇化合物RCCo3(CO)9、铁化合物以及季铵盐R1 3R2NCl或季膦盐R1 3R2PCl,其中铁化合物选自Fe(OAc)2、Fe(OAc)3、FeCl2、FeCl3、Fe(NO3)3、FeSO4、R1 4NFeCo3(CO)12或Fe(CO)5中的任意一种,R选自H、F、Cl、Br、甲基、乙基、甲苯基以及苯基,R1选自C1-C4的烷基,R2选自C1-C18的链状烷基。
优选地,所述复合催化剂中,以质量比计,RCCo3(CO)9:铁化合物:R1 3R2NCl或R1 3R2PCl=1-8:1-6:1-8。
本发明还提供利用上述复合催化剂合成四氢呋喃-3-甲醛的方法:在所述复合催化剂存在下,向2,5-二氢呋喃中通入氢气及一氧化碳,加热反应,反应结束后,通过蒸馏的方式得到四氢呋喃-3-甲醛。
优选地,所述复合催化剂中RCCo3(CO)9的用量为2,5-二氢呋喃质量的1-10%;铁化合物的用量为2,5-二氢呋喃质量的1-8%;季铵盐R1 3R2NCl或季膦盐R1 3R2PCl的用量为2,5-二氢呋喃质量的1-10%。
优选地,所述氢气与一氧化碳的摩尔比为1:1-1:2。
优选地,所述2,5-二氢呋喃溶解在溶剂中,所述溶剂选自甲苯、二氯甲烷、四氢呋喃、甲基叔丁基醚及丁醚;所述溶剂的用量为2,5-二氢呋喃摩尔量的0-10倍,且溶剂中含水质量分数为0.1-0.3%。
优选地,所述反应温度控制在50-120℃。
优选地,所述反应压力控制在1.0-6.0MPa。
优选地,所述反应时间为3-50h。
氢甲酰化反应的工业生产过程中,催化体系的选择决定了整体工艺的性能和技术先进性。传统的钴基催化剂的有效成分HCo(CO)4容易分解,需要维持较高的合成气压力(20-30MPa),致使工业生产条件异常苛刻,随着配位化学的迅速发展,有机膦配体被引入以显著降低反应压力。但这种改性后的钴体系也会带来一些新问题,如活性下降、加氢副反应活性增大。羰基铑催化剂的氢甲酰化活性虽然高,但铑为贵金属,世界范围储量仅为778t,加上其它领域(如高附加值的手性合成)对铑的需求量也在日益增加。由此带来的成本上的劣势远远超过了铑催化剂在催化活性上的优势,使得其很长一段时间没有工业化应用。
本发明采用钴簇化合物RCCo3(CO)9、铁化合物以及季铵盐R1 3R2NCl或季膦盐R1 3R2PCl组成的复合催化剂,既克服了传统钴基催化剂必须在高温高压下才能进行的缺点,反应条件温和,又解决了羰基铑催化剂价格昂贵的问题。
本发明利用RCCo3(CO)9、铁化合物以及季铵盐R1 3R2NCl或季膦盐R1 3R2PCl三种催化剂的的协同效应,对催化剂的活性和选择性产生显著影响,所得产品收率和选择性明显高于单一催化剂的使用效果。
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
1L高压釜内加入2,5-二氢呋喃150g,加入四氢呋喃308g(含水质量分数为0.1%),加入催化剂HCCo3(CO)9 1.5g、Fe(CO)51.5g及四丁基氯化铵12g,通入氢气置换反应釜内空气后,再通入氢气0.5MPa,一氧化碳0.5MPa,加热至60℃,反应50h。反应结束后常压蒸出溶剂四氢呋喃回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率90.6%。剩余催化剂回收套用。
实施例2
1L高压釜内加入2,5-二氢呋喃150g,加入四氢呋喃308g(含水质量分数为0.3%),加入催化剂HCCo3(CO)9 12g、Fe(CO)5 9g及四丁基氯化铵1.5g,通入氢气置换反应釜内空气后,再通入氢气2.0MPa,一氧化碳4.0MPa,加热至120℃,反应3h。反应结束后常压蒸出溶剂四氢呋喃回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率89.2%。剩余催化剂回收套用。
实施例3
2L高压釜内加入2,5-二氢呋喃150g、甲基叔丁基醚1508g(含水质量分数为0.1%),加入催化剂ClCCo3(CO)9 6g、Fe(OAc)2 6g及十二烷基三甲基氯化铵4.5g,通入氢气置换釜内空气后,再通入氢气1.5MPa,一氧化碳1.5MPa,加热至80℃,反应40h。反应结束后常压蒸出溶剂甲基叔丁基醚回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度97%,收率93.3%。剩余催化剂回收套用。
实施例4
1L高压釜内加入2,5-二氢呋喃150g、二氯甲烷364g(含水质量分数为0.2%),加入催化剂CH3CCo3(CO)9 4.5g、FeCl3 3g及三甲基丁基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.5MPa,一氧化碳1.5MPa,加热至100℃,反应30h。反应结束后常压蒸出溶剂二氯甲烷回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率90.4%。剩余催化剂回收套用。
实施例5
1L高压釜内加入2,5-二氢呋喃150g、二氯甲烷364g(含水质量分数为0.2%),加入催化剂CH3CCo3(CO)9 4.5g、FeCl3 3g及三甲基丁基氯化膦3g,通入氢气置换釜内空气后,再通入氢气3.0MPa,一氧化碳3.0MPa,加热至100℃,反应30h。反应结束后常压蒸出溶剂二氯甲烷回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率92.3%。剩余催化剂回收套用。
实施例6
1L高压釜内加入2,5-二氢呋喃150g、甲苯394g(含水质量分数为0.1%),加入催化剂PhCCo3(CO)9 3g、Fe(CO)5 4.5g及四丙基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.0MPa,一氧化碳1.0MPa,加热至90℃,反应45h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度97%,收率93.6%,再减压蒸馏蒸出溶剂甲苯回收套用。剩余催化剂回收套用。
实施例7
1L高压釜内加入2,5-二氢呋喃150g、甲苯394g(含水质量分数为0.1%),加入催化剂PhCCo3(CO)9 3g、Fe(CO)5 4.5g及四丙基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.0MPa,一氧化碳1.0MPa,加热至90℃,反应10h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度97%,收率87.8%,再减压蒸馏蒸出溶剂甲苯回收套用。剩余催化剂回收套用。
实施例8
1L高压釜内加入2,5-二氢呋喃150g、二氯甲烷364g(含水质量分数为0.2%),加入催化剂CH3CCo3(CO)9 4.5g、FeCl3 3g及三甲基丁基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.5MPa,一氧化碳1.5MPa,加热至120℃,反应30h。反应结束后常压蒸出溶剂二氯甲烷回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率92.4%。剩余催化剂回收套用。
实施例9
1L高压釜内加入2,5-二氢呋喃150g、二氯甲烷364g(含水质量分数为0.2%),加入催化剂CH3CCo3(CO)9 7.5g、FeCl3 4.5g及三甲基丁基氯化膦4.5g,通入氢气置换釜内空气后,再通入氢气1.5MPa,一氧化碳1.5MPa,加热至100℃,反应30h。反应结束后常压蒸出溶剂二氯甲烷回收套用,再减压蒸馏蒸出产品四氢呋喃-3-甲醛,纯度98%,收率93.6%。剩余催化剂回收套用。
实施例10
250mL高压釜内加入2,5-二氢呋喃150g,加入催化剂CH3CCo3(CO)94.5g、FeCl3 3g及三甲基丁基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.5MPa,一氧化碳1.5MPa,加热至120℃,反应30h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度96%,收率89.7%。剩余催化剂回收套用。
对比例1
1L高压釜内加入2,5-二氢呋喃150g、甲苯394g(含水质量分数为0.1%),加入催化剂PhCCo3(CO)9 11g,通入氢气置换釜内空气后,再通入氢气1.0MPa,一氧化碳1.0MPa,加热至90℃,反应10h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度94%,收率72%,再减压蒸馏蒸出溶剂甲苯回收套用。剩余催化剂回收套用。
对比例2
1L高压釜内加入2,5-二氢呋喃150g、甲苯394g(含水质量分数为0.1%),加入催化剂PhCCo3(CO)9 3g、Fe(CO)5 4.5g,通入氢气置换釜内空气后,再通入氢气1.0MPa,一氧化碳1.0MPa,加热至90℃,反应10h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度93%,收率78.9%,再减压蒸馏蒸出溶剂甲苯回收套用。剩余催化剂回收套用。
对比例3
1L高压釜内加入2,5-二氢呋喃150g、甲苯394g(含水质量分数为0.1%),加入催化剂PhCCo3(CO)9 3g、四丙基氯化膦3g,通入氢气置换釜内空气后,再通入氢气1.0MPa,一氧化碳1.0MPa,加热至90℃,反应10h。反应结束后常压蒸出产品四氢呋喃-3-甲醛,纯度95%,收率81.2%,再减压蒸馏蒸出溶剂甲苯回收套用。剩余催化剂回收套用。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换或改进等,均应包含在本发明的保护范围之内。
Claims (9)
1.一种用于合成四氢呋喃-3-甲醛的复合催化剂,其特征在于:所述复合催化剂用于催化2,5-二氢呋喃合成四氢呋喃-3-甲醛,所述复合催化剂包括钴簇化合物RCCo3(CO)9、铁化合物以及季铵盐R1 3R2NCl或季膦盐R1 3R2PCl,其中铁化合物选自Fe(OAc)2、Fe(OAc)3、FeCl2、FeCl3、Fe(NO3)3、FeSO4、R1 4NFeCo3(CO)12或Fe(CO)5中的任意一种,R选自H、F、Cl、Br、甲基、乙基、甲苯基以及苯基,R1选自C1-C4的烷基,R2选自C1-C18的链状烷基。
2.如权利要求1所述的复合催化剂,其特征在于:所述复合催化剂中,以质量比计,RCCo3(CO)9:铁化合物:R1 3R2NCl或R1 3R2PCl=1-8:1-6:1-8。
3.利用权利要求1或2所述的复合催化剂合成四氢呋喃-3-甲醛的方法,其特征在于:在所述复合催化剂存在下,向2,5-二氢呋喃中通入氢气及一氧化碳,加热反应,反应结束后,通过蒸馏的方式得到四氢呋喃-3-甲醛。
4.如权利要求3所述的方法,其特征在于:所述复合催化剂中RCCo3(CO)9的用量为2,5-二氢呋喃质量的1-10%;铁化合物的用量为2,5-二氢呋喃质量的1-8%;季铵盐R1 3R2NCl或季膦盐R1 3R2PCl的用量为2,5-二氢呋喃质量的1-10%。
5.如权利要求3所述的方法,其特征在于:所述氢气与一氧化碳的摩尔比为1:1-1:2。
6.如权利要求3所述的方法,其特征在于:所述2,5-二氢呋喃溶解在溶剂中,所述溶剂选自甲苯、二氯甲烷、四氢呋喃、甲基叔丁基醚及丁醚;所述溶剂的用量为2,5-二氢呋喃摩尔量的0-10倍,且溶剂中含水质量分数为0.1-0.3%。
7.如权利要求3所述的方法,其特征在于:所述反应温度控制在50-120℃。
8.如权利要求3所述的方法,其特征在于:所述反应压力控制在1.0-6.0MPa。
9.如权利要求3所述的方法,其特征在于:所述反应时间为3-50h。
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