CN116272984A - 一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂及其制备方法与应用 - Google Patents
一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂及其制备方法与应用 Download PDFInfo
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- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 title claims abstract description 76
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000003054 catalyst Substances 0.000 title claims abstract description 49
- 238000002360 preparation method Methods 0.000 title abstract description 19
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000006356 dehydrogenation reaction Methods 0.000 claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 8
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 7
- 230000003197 catalytic effect Effects 0.000 claims abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 34
- 239000001257 hydrogen Substances 0.000 claims description 34
- 229910052739 hydrogen Inorganic materials 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 31
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 28
- 238000000227 grinding Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 claims description 16
- 239000012018 catalyst precursor Substances 0.000 claims description 16
- 230000009467 reduction Effects 0.000 claims description 14
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 10
- 229910017604 nitric acid Inorganic materials 0.000 claims description 10
- 239000012266 salt solution Substances 0.000 claims description 10
- 239000002041 carbon nanotube Substances 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 6
- 229910052734 helium Inorganic materials 0.000 claims description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 4
- -1 silver ions Chemical class 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate group Chemical group [N+](=O)([O-])[O-] NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 3
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 abstract description 2
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 4
- 239000005751 Copper oxide Substances 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 229910000431 copper oxide Inorganic materials 0.000 description 4
- 229910052746 lanthanum Inorganic materials 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 229910000420 cerium oxide Inorganic materials 0.000 description 3
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 229910001414 potassium ion Inorganic materials 0.000 description 3
- 235000010333 potassium nitrate Nutrition 0.000 description 3
- 239000004323 potassium nitrate Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 229910017813 Cu—Cr Inorganic materials 0.000 description 2
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 description 2
- 231100000956 nontoxicity Toxicity 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017773 Cu-Zn-Al Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 229910003120 Zn-Ce Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000000543 intermediate Chemical class 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- CZMAIROVPAYCMU-UHFFFAOYSA-N lanthanum(3+) Chemical compound [La+3] CZMAIROVPAYCMU-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
- B01J21/185—Carbon nanotubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
- B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/688—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with manganese, technetium or rhenium
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- B01J35/617—
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- B01J35/618—
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/26—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/32—Oxygen atoms
- C07D307/33—Oxygen atoms in position 2, the oxygen atom being in its keto or unsubstituted enol form
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
Abstract
本发明公开一种催化1,4‑丁二醇脱氢制备γ‑丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分3‑8%,助剂0.5‑3%;所述活性组分为Ag,所述助剂为K、La中的至少一种;所述载体为碳载体和金属氧化物载体的混合物;所述金属氧化物载体为MgO、CaO、MnO、CeO2中的任意一种。同时,本发明还公开所述催化剂的制备方法及其应用。本发明提供的催化剂制备方法简单、制备过程环境友好、无毒,用于丁二醇脱氢制备γ‑丁内酯时,原料转化率高,目标产物选择性高,催化剂催化活性高。
Description
技术领域
本发明属于γ-丁内酯制备技术领域,具体涉及一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂及其制备方法与应用。
背景技术
γ-丁内酯是一类重要的有机化合物和中间体,它及其衍生物广泛应用于石油化工、纺织、医药、农药和香料等工业领域。随着精细化工、制药和可降解塑料产业的迅猛发展,近年来γ-丁内酯的需求量逐年上升。γ-丁内酯的合成方法主要有顺酐加氢法和1,4-丁二醇脱氢法,后者因其在原料和产品分离等方面的优势,成为工业上γ-丁内酯的主流生产方法。1,4-丁二醇脱氢法制备γ-丁内酯常见催化剂体系有:有Cu-Cr系催化剂、Cu-Zn系催化剂,以及K、La等碱金属或碱土金属为助剂改性的上述催化剂。其中,Cu-Cr系催化剂是开发最早的催化剂,具有寿命长、稳定性好的优点,但Cr毒性强,污染大。近几年,Cu-Zn系催化剂受到越来越多的关注。
中国专利CN103044367A公开了一种1 ,4-丁二醇脱氢制γ-丁内酯催化剂,首先采用共沉淀法制备Cu-Zn-Al混合氧化物,再负载K或Li助剂。该催化剂中氧化铜质量百分含量为37-52%,1 ,4-丁二醇的转化率达到98%,γ-丁内酯选择性达99%。CN1562473A采用碱性沉淀剂沉淀法制备了Cu-Zn-Ce催化剂,其中氧化铜质量百分含量为48-55%,1 ,4-丁二醇的转化率可达98%,γ-丁内酯选择性接近95%。以上Cu-Zn系催化剂制备方法较繁琐,氧化铜含量均较高。氧化铜含量高易引发活性金属Cu团聚,进而带来目标产物收率降低等问题。
因此需要开发一种制备方式简单,活性高、活性组分含量低、无毒无污染的1 ,4-丁二醇脱氢制γ-丁内酯催化剂。
发明内容
针对现有技术的缺陷,本发明提供一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂及其制备方法与应用,制备过程环保无毒,催化活性好。
一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分3-8%,助剂0.5-3%;所述活性组分为Ag,所述助剂为K、La中的至少一种;所述载体为碳载体和金属氧化物载体的混合物;所述金属氧化物载体为MgO、CaO 、MnO、CeO2中的任意一种。
优选地,所述碳载体在载体中质量占比为50-85%。
优选地,所述碳载体为活性炭、碳纳米管、石墨烯中的任意一种。
优选地,所述碳载体的比表面积大于200m2/g。
所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,包括以下步骤:
(1)将碳载体加入硝酸溶液中,在70-150℃下加热回流3-14h,过滤,用去离子水洗涤至中性,烘干干燥,研磨,然后与金属氧化物载体研磨混合,得到载体;
(2)配制硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后烘干干燥,焙烧,研磨,得到负载银离子的催化剂前体;
(3)将助剂对应的盐溶于水中,得到助剂的盐溶液,将所述负载银离子的催化剂前体加入助剂的盐溶液中,室温下搅拌至干,然后烘干干燥,焙烧,研磨,压片至20-60目,即可。
优选地,所述助剂对应的盐为硝酸盐、氯化盐或者醋酸盐;所述硝酸银溶液中银离子的浓度为0.5-1mol/L;所述助剂的盐溶液中,助剂的离子浓度为0.1-0.5 mol/L。
优选地,步骤(1)所述硝酸溶液的浓度为5-10 mol/L;碳载体与硝酸溶液的比例为1g:(10-20)mL。
优选地,所述烘干干燥为在60-100℃下烘干8-12h;所述焙烧为在250-350℃下焙烧3-5h。
一种催化1,4-丁二醇脱氢制备γ-丁内酯的方法:将催化剂装填入固定床反应器,通入第一含氢气体进行还原活化,然后调至反应温度180-250℃,切入第二含氢气体,1,4-丁二醇液体以1-4h-1的空速经100-180℃汽化后用所述第二含氢气体带入固定床反应器,在常压至0.5MPa下进行脱氢反应,脱氢反应时氢醇摩尔比为5-20;
其中,所述催化剂为权利要求1所述催化剂;
所述第一含氢气体为100%的氢气、或者由体积占比≥5%的氢气和余量的第一平衡气组成,所述第一平衡气为氮气、氦气或氩气;
所述第二含氢气体为100%的氢气、或者由体积占比≥60%的氢气和余量的第二平衡气组成,所述第二平衡气为氮气、氦气或氩气。
优选地,所述还原活化的条件为:还原温度190-260℃,还原时间3-8h,还原压力为常压,第一含氢气体的空速为500-5000h-1。
本发明的优点:
(1)本发明提供的催化剂制备方法简单、制备过程环境友好、无毒;
(2)本发明提供的催化剂,用于丁二醇脱氢制备γ-丁内酯时,原料转化率高,目标产物选择性高,催化剂催化活性高。
具体实施方式
实施例1
1. 一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分3%,助剂3%;所述活性组分为Ag,所述助剂为K;所述载体为质量比为85:15的活性炭(AC)和氧化镁(MgO)的混合物;所述活性炭在载体中质量占比为85%;所述活性炭的比表面积为1060m2/g。
2. 所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,包括以下步骤:
(1)按照1g:20mL的比例将活性炭加入5mol/L的硝酸溶液中,在150℃下加热回流3h,过滤,用去离子水洗涤至中性,60℃烘干干燥12h,研磨,然后与氧化镁研磨混合,得到载体;
(2)配制银离子浓度为0.5mol/L的硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后60℃烘干干燥12h,250℃下焙烧5h,研磨,得到负载银离子的催化剂前体;
(3)将硝酸钾溶于水中,得到钾离子浓度为0.5mol/L的硝酸钾溶液,将所述负载银离子的催化剂前体加入硝酸钾溶液中,室温下搅拌至干,然后60℃烘干干燥12h,250℃下焙烧5h,研磨,压片至20-40目,即可。
实施例2
1. 一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分8%,助剂0.5%;所述活性组分为Ag,所述助剂为La;所述载体为质量比为1:1的石墨烯(Graphene)和氧化锰(MnO)的混合物;所述石墨烯的比表面积为740m2/g。
2. 所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,包括以下步骤:
(1)按照1g:10mL的比例将石墨烯加入10 mol/L的硝酸溶液中,在70℃下加热回流14h,过滤,用去离子水洗涤至中性,100℃烘干干燥8h,研磨,然后与氧化锰研磨混合,得到载体;
(2)配制银离子浓度为1.0mol/L的硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后100℃烘干干燥8h,350℃下焙烧3h,研磨,得到负载银离子的催化剂前体;
(3)将硝酸镧溶于水中,得到镧离子浓度为0.1mol/L的硝酸镧溶液,将所述负载银离子的催化剂前体加入硝酸镧溶液中,室温下搅拌至干,然后100℃烘干干燥8h,350℃下焙烧3h,研磨,压片至40-60目,即可。
实施例3
1. 一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分5%,助剂1.2%;所述活性组分为Ag,所述助剂为等质量比的K和La;所述载体为质量比为65:35的碳纳米管(CNTs)和氧化钙(CaO)的混合物;所述碳纳米管的比表面积为280m2/g。
2. 所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,包括以下步骤:
(1)按照1g:15mL的比例将碳纳米管加入8mol/L的硝酸溶液中,在140℃下加热回流10h,过滤,用去离子水洗涤至中性,80℃烘干干燥10h,研磨,然后与氧化钙研磨混合,得到载体;
(2)配制银离子浓度为0.6mol/L的硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后80℃烘干干燥10h,350℃下焙烧3h,研磨,得到负载银离子的催化剂前体;
(3)将氯化钾和氯化镧溶于水中,得到钾离子浓镧离子总浓度为0.3mol/L的助剂盐溶液,将所述负载银离子的催化剂前体加入助剂盐溶液中,室温下搅拌至干,然后80℃烘干干燥10h,350℃下焙烧3h,研磨,压片至20-60目,即可。
实施例4
1. 一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分6.5%,助剂2.5%;所述活性组分为Ag,所述助剂为等质量比的K和La;所述载体为质量比为80:20的碳纳米管(CNTs)和氧化铈(CeO2)的混合物;所述碳纳米管的比表面积为250m2/g。
2. 所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,包括以下步骤:
(1)按照1g:20mL的比例将碳纳米管加入6mol/L的硝酸溶液中,在150℃下加热回流8h,过滤,用去离子水洗涤至中性,75℃烘干干燥12h,研磨,然后与氧化铈研磨混合,得到载体;
(2)配制银离子浓度为0.85mol/L的硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后75℃烘干干燥12h,350℃下焙烧3h,研磨,得到负载银离子的催化剂前体;
(3)将氯化钾和氯化镧溶于水中,得到钾离子浓镧离子总浓度为0.3mol/L的助剂盐溶液,将所述负载银离子的催化剂前体加入助剂盐溶液中,室温下搅拌至干,然后75℃烘干干燥12h,350℃下焙烧3h,研磨,压片至40-60目,即可。
实施例5
采用本发明提供的催化剂催化1,4-丁二醇脱氢制备γ-丁内酯的方法,将催化剂装填入固定床反应器,通入第一含氢气体进行还原活化,然后调至反应温度180-250℃,切入第二含氢气体,1,4-丁二醇液体以1-4h-1的空速经100-180℃汽化后用所述第二含氢气体带入固定床反应器,在常压至0.5MPa下进行脱氢反应,脱氢反应时氢醇摩尔比为5-20;
其中,所述第一含氢气体为100%的氢气、或者由体积占比≥5%的氢气和余量的第一平衡气组成,所述第一平衡气为氮气、氦气或氩气;
所述第二含氢气体为100%的氢气、或者由体积占比≥60%的氢气和余量的第二平衡气组成,所述第二平衡气为氮气、氦气或氩气;
所述还原活化的条件为:还原温度190-260℃,还原时间3-8h,还原压力为常压,第一含氢气体的空速为500-5000h-1;
反应2h后气相色谱在线分析产物,第一含氢气体的空速均为5000h-1,其他反应条件和反应结果见表1。
表1 反应条件和反应结果
Claims (10)
1.一种催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,其特征在于:所述催化剂由活性组分、助剂和载体组成;以占所述载体的重量比计,活性组分和助剂的含量分别如下:活性组分3-8%,助剂0.5-3%;所述活性组分为Ag,所述助剂为K、La中的至少一种;所述载体为碳载体和金属氧化物载体的混合物;所述金属氧化物载体为MgO、CaO 、MnO、CeO2 中的任意一种。
2.根据权利要求1所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,其特征在于:所述碳载体在载体中质量占比为50-85%。
3.根据权利要求2所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,其特征在于:所述碳载体为活性炭、碳纳米管、石墨烯中的任意一种。
4.根据权利要求3所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂,其特征在于:所述碳载体的比表面积大于200m2/g。
5.权利要求1所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,其特征在于:包括以下步骤:
(1)将碳载体加入硝酸溶液中,在70-150℃下加热回流3-14h,过滤,用去离子水洗涤至中性,烘干干燥,研磨,然后与金属氧化物载体研磨混合,得到载体;
(2)配制硝酸银溶液,将所述载体加入硝酸银溶液中,室温下搅拌至干,然后烘干干燥,焙烧,研磨,得到负载银离子的催化剂前体;
(3)将助剂对应的盐溶于水中,得到助剂的盐溶液,将所述负载银离子的催化剂前体加入助剂的盐溶液中,室温下搅拌至干,然后烘干干燥,焙烧,研磨,压片至20-60目,即可。
6.根据权利要求5所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,其特征在于:所述助剂对应的盐为硝酸盐、氯化盐或者醋酸盐;所述硝酸银溶液中银离子的浓度为0.5-1mol/L;所述助剂的盐溶液中,助剂的离子浓度为0.1-0.5 mol/L。
7.根据权利要求5所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,其特征在于:步骤(1)所述硝酸溶液的浓度为5-10 mol/L;碳载体与硝酸溶液的比例为1g:(10-20)mL。
8.根据权利要求5所述催化1,4-丁二醇脱氢制备γ-丁内酯的催化剂的制备方法,其特征在于:所述烘干干燥为在60-100℃下烘干8-12h;所述焙烧为在250-350℃下焙烧3-5h。
9.一种催化1,4-丁二醇脱氢制备γ-丁内酯的方法,其特征在于:将催化剂装填入固定床反应器,通入第一含氢气体进行还原活化,然后调至反应温度180-250℃,切入第二含氢气体,1,4-丁二醇液体以1-4h-1的空速经100-180℃汽化后用所述第二含氢气体带入固定床反应器,在常压至0.5MPa下进行脱氢反应,脱氢反应时氢醇摩尔比为5-20;
其中,所述催化剂为权利要求1所述催化剂;
所述第一含氢气体为100%的氢气、或者由体积占比≥5%的氢气和余量的第一平衡气组成,所述第一平衡气为氮气、氦气或氩气;
所述第二含氢气体为100%的氢气、或者由体积占比≥60%的氢气和余量的第二平衡气组成,所述第二平衡气为氮气、氦气或氩气。
10.根据权利要求9所述一种催化1,4-丁二醇脱氢制备γ-丁内酯的方法,其特征在于:所述还原活化的条件为:还原温度190-260℃,还原时间3-8h,还原压力为常压,第一含氢气体的空速为500-5000h-1。
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