CN106946714A - 一种二乙基甲苯二胺的合成工艺 - Google Patents
一种二乙基甲苯二胺的合成工艺 Download PDFInfo
- Publication number
- CN106946714A CN106946714A CN201710155403.7A CN201710155403A CN106946714A CN 106946714 A CN106946714 A CN 106946714A CN 201710155403 A CN201710155403 A CN 201710155403A CN 106946714 A CN106946714 A CN 106946714A
- Authority
- CN
- China
- Prior art keywords
- toluene diamine
- diethyl toluene
- autoclave
- toluenediamine
- nitrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- PISLZQACAJMAIO-UHFFFAOYSA-N 2,4-diethyl-6-methylbenzene-1,3-diamine Chemical compound CCC1=CC(C)=C(N)C(CC)=C1N PISLZQACAJMAIO-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000003786 synthesis reaction Methods 0.000 title abstract description 9
- 230000015572 biosynthetic process Effects 0.000 title abstract description 8
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003054 catalyst Substances 0.000 claims abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 18
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 18
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000035484 reaction time Effects 0.000 claims abstract description 5
- 239000005977 Ethylene Substances 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 4
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 claims description 22
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 17
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 11
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 11
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 2
- 150000004696 coordination complex Chemical class 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000002045 lasting effect Effects 0.000 claims 1
- 238000010792 warming Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 239000004411 aluminium Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 239000004970 Chain extender Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- IBOFVQJTBBUKMU-UHFFFAOYSA-N 4,4'-methylene-bis-(2-chloroaniline) Chemical compound C1=C(Cl)C(N)=CC=C1CC1=CC=C(N)C(Cl)=C1 IBOFVQJTBBUKMU-UHFFFAOYSA-N 0.000 description 3
- 241001112258 Moca Species 0.000 description 3
- 238000005804 alkylation reaction Methods 0.000 description 3
- 150000001412 amines Chemical group 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 239000000686 essence Substances 0.000 description 3
- 239000000499 gel Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000001988 toxicity Effects 0.000 description 3
- 231100000419 toxicity Toxicity 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000029936 alkylation Effects 0.000 description 2
- 150000004982 aromatic amines Chemical class 0.000 description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 230000009267 minimal disease activity Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 150000004998 toluenediamines Chemical class 0.000 description 2
- PBWHJRFXUPLZDS-UHFFFAOYSA-N (1-Ethylpropyl)benzene Chemical compound CCC(CC)C1=CC=CC=C1 PBWHJRFXUPLZDS-UHFFFAOYSA-N 0.000 description 1
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- GTACSIONMHMRPD-UHFFFAOYSA-N 2-[4-[2-(benzenesulfonamido)ethylsulfanyl]-2,6-difluorophenoxy]acetamide Chemical compound C1=C(F)C(OCC(=O)N)=C(F)C=C1SCCNS(=O)(=O)C1=CC=CC=C1 GTACSIONMHMRPD-UHFFFAOYSA-N 0.000 description 1
- 101710130081 Aspergillopepsin-1 Proteins 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 102100031007 Cytosolic non-specific dipeptidase Human genes 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 125000005264 aryl amine group Chemical group 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical group [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002608 ionic liquid Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- LPUQAYUQRXPFSQ-DFWYDOINSA-M monosodium L-glutamate Chemical compound [Na+].[O-]C(=O)[C@@H](N)CCC(O)=O LPUQAYUQRXPFSQ-DFWYDOINSA-M 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 239000004223 monosodium glutamate Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000003495 polar organic solvent Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 239000011240 wet gel Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/68—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
-
- 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
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
-
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明涉及一种二乙基甲苯二胺的合成工艺,采用溶胶凝胶法制备了催化剂CeO2‑CuO/ZnO/Al2O3,按金属原子摩尔比n(甲苯二胺):n(乙烯):n(催化剂)=1.1:2.2:0.05投料,向高压反应釜中通入H2对催化剂进行还原和活化,打入甲苯二胺(TDA),充分搅拌,通入乙烯气体,置换H2,程序升温至220~230℃,维持反应压力3.0 MPa,反应时间3 h。往高压釜中加入适量水,减压蒸馏得到二乙基甲苯二胺(DETDA),通过该方法制得的二乙基甲苯二胺(DETDA)的选择性和收率分别为85.2%、93.7%,纯度为99.1%,品质达到了国家质量标准,是绿色环保的清洁生产工艺。
Description
技术领域
本发明涉及二乙基甲苯二胺的合成工艺,具体指催化剂CeO2-CuO/ZnO/Al2O3催化合成二乙基甲苯二胺工艺,属于化学领域。
背景技术
胺类扩链剂有脂肪族胺与芳香族胺两类,3,3'-二氯-4,4'-二氨基二苯甲烷(MOCA)曾占据芳香族胺扩链剂主导地位,尽管所得产品拥有较好的力学性能,最新临床发现,3,3'-二氯-4,4'-二氨基二苯甲烷(MOCA)具有一定的致癌性,有损人们的身心健康,欧美一些国家已经严格限制其使用,开发新型的环保芳胺扩链剂逐渐成为现代化工行业紧迫任务。
二乙基甲苯二胺(DETDA) 呈淡黄色至琥珀色透明粘稠液体,稍有氨味,微溶于水,溶于醇、醚、酮等极性有机溶剂,与聚醚、聚酯多元醇相容性好。
二乙基甲苯二胺(DETDA)粘度低,分散均匀,化学活性较高,可以直接使用做扩链剂,反应较彻底,综合考察未发现对人身健康有损害,是理想的3,3'-二氯-4,4'-二氨基二苯甲烷(MOCA) 替代品。二乙基甲苯二胺(DETDA) 具有脱模时间短、初始强度高、制品耐水解、耐热等优点,主要用于固化剂、扩链剂、聚氨酯原料、胺类催化剂、润滑剂、工业油脂的抗氧剂、化学合成中间体。
传统的二乙基甲苯二胺(DETDA) 合成方法:甲苯二胺(TDA)和乙烯为原料,在催化剂的存在条件下,高温高压发生烷基化反应,经精制而成。伴随以二乙基甲苯二胺(DETDA)在聚脲弹性体、聚乙烯、聚氨酯制品的需求量逐年快速递增,选择新型催化剂,提高二乙基甲苯二胺(DETDA) 的选择性和收率,节能降耗,生产工艺的改进和反应条件的优化,逐渐变得越来越重要了。
合成二乙基甲苯二胺(DETDA) 催化剂主要包括:铝粉、三氯化铝、烷基化铝、铝锌合金-三氯化铝混合体系、铝锌合金-三氯化铝-烷基化铝混合体系。铝粉催化活性偏低;三氯化铝反应中容易结焦;烷基化铝如三乙基化铝价格昂贵,毒性很强;尽管催化体系不断改进,合成二乙基甲苯二胺(DETDA)工艺仍然受到高温高压的苛刻反应条件,反应时间偏长,生产成本偏高等局限。采用碱性离子液体催化合成二乙基甲苯二胺(DETDA),样品的精制和分离存在一定问题,未见工业化应用的报道。
铜系催化剂如CuO/ZnO/Al2O3具有高催化活性和选择性,稀土铈离子拥有未满态的4f 电子层结构,由此产生十分丰富的电子能级,离子半径偏大等特点,适量铈离子掺杂于催化剂,犹如添加“工业味精”一样,会产生较多的新催化活性中心,引起人们很大的研究兴趣。
发明内容
本发明的目的在于:首先,采用溶胶凝胶法制备了CeO2-CuO/ZnO/Al2O3,应用于DETDA的合成,DETDA的选择性和收率分别为85.2%、93.7%,纯度为99.1%,达到了国家产品质量标准。本发明克服了传统合成DETDA铝系催化催化活性偏低、容易结焦、价格昂贵、毒性很强等缺点180 ℃,工艺方案综合效益评估发现,3% CeO2掺杂量的CeO2-CuO/ZnO/Al2O3催化活性最高。
本发明的目的是这样实现的:
在80 ℃恒温水浴条件下,按照摩尔比n(硝酸铜):n(硝酸锌):n(硝酸铝):n(硝酸铈)= 1.1:2.2:1.0:0.05,配制硝酸铜、硝酸锌、硝酸铝、硝酸铈的水溶液,搅拌0.5 h,按照摩尔比n(柠檬酸):n(硝酸铜+硝酸锌+硝酸铝+硝酸铈)=1.2:1逐滴加入柠檬酸溶液,形成金属络合物溶胶,恒温搅拌5 h,生成凝胶;
将上述的凝胶在100℃恒温干燥箱中干燥8 h,得到干凝胶,研磨后,将其置于焙烧炉中,加热2 h程序升温至550 ℃,恒温8 h,自然冷却到室温,制得CeO2-CuO/ZnO/Al2O3;
按照摩尔比n(甲苯二胺):n(乙烯):n(催化剂)=1.1:2.2:0.05,向高压反应釜2中加入10.0 Kg催化剂CeO2-CuO/ZnO/Al2O3,通过稳压阀和单向调节阀通入N2试压至3.0 MPa,30 min内压力不下降即系统密闭性符合要求,通过打料泵3,向高压反应釜2中投入244.3 Kg甲苯二胺(TDA)。
高压反应釜2程序升温至180 ℃,充分搅拌30 min。切换H2至3.0 MPa,恒温2 h,对催化剂充分还原。乙烯经压缩后进入高压反应釜2,置换H2,程序升温至220~230 ℃,持续补充乙烯,维持反应压力3.0 MPa,反应时间3 h。
向高压反应釜2中加入100 Kg水,加入水的质量是催化剂CeO2-CuO/ZnO/Al2O3的10倍,高压反应釜2中的混合物料打到中转罐5,再经精馏进料泵14打入到精馏塔6内,保持精馏塔6内的真空度0.98 MPa和温度198℃条件下,精馏塔6减压蒸馏得到二乙基甲苯二胺(DETDA)。
精馏塔6产生的甲苯二胺(TDA)蒸汽通过塔顶全凝器10的冷凝后进入到塔顶储罐12中,塔顶储罐12中的甲苯二胺(TDA)通过循环泵13打入甲苯二胺储罐4,用以循环利用,甲苯二胺(TDA)冷凝液通过塔顶回流泵11,进入精馏塔的塔顶储罐12中。
精馏塔6底部产品二乙基甲苯二胺(DETDA)经再沸器8的纯化分离后输送至塔底产品储罐9中。部分塔底部气相二乙基甲苯二胺(DETDA),经过再沸器8,塔底回流泵7,重新回到精馏塔6底部,用以确保精馏塔的气相回流。
高压反应釜2通入氮气(N2)试压至3.0 MPa,保压时间不少于30min。
与现有技术相比,本发明具有如下优点:
1. 采用CeO2-CuO/ZnO/Al2O3,还原温度为180 ℃,比传统温度降低了20 ℃左右,反应条件相对温和,容易控制,可操作性强。
2. 采用CeO2-CuO/ZnO/Al2O3,可以有效克服铝系催化剂容易结焦,活性低,价格高,毒性大等缺点,是绿色环保的清洁生产工艺。
3.二乙基甲苯二胺(DETDA)的选择性和收率分别为85.2%、93.7%,纯度为99.1%,DETDA品质达到了国家质量标准,该工艺路线切实可行。
四、附图说明
图1是催化合成二乙基甲苯二胺工艺流程简图
图2是二乙基甲苯二胺(DETDA)的1HNMR谱图
五、具体实施方式
1. 控制柜、2. 高压发应釜、3. 甲苯二胺打料泵、4. 甲苯二胺储罐、5. 中转罐、6.精馏塔、7. 塔底回流泵、8. 再沸器、9.塔底产品储罐、10. 塔顶全凝器、11.塔顶回流泵、12.塔顶储罐、13.甲苯二胺循环泵、14.精馏进料泵
结合图1~2,本发明的一种催化合成二乙基甲苯二胺工艺,在80 ℃恒温水浴条件下,配制硝酸铜、硝酸锌、硝酸铝、硝酸铈的水溶液,按照摩尔比n(硝酸铜):n(硝酸锌):n(硝酸铝):n(硝酸铈)=1:1:2:0.06,即硝酸铜、硝酸锌、硝酸铝、硝酸铈的摩尔比为1:1:2:0.06,溶液呈蓝色,充分搅拌0.5 h,然后按照摩尔比n(柠檬酸):n(硝酸铜+硝酸锌+硝酸铝+硝酸铈) =1.2:1,即柠檬酸与硝酸铜加硝酸锌加硝酸铝加硝酸铈的摩尔比为1.2:1,逐滴加入一定浓度、体积的柠檬酸溶液,形成金属络合物溶胶,恒温搅拌5 h,生成粘稠状的湿凝胶。将上述的凝胶在100℃恒温干燥箱中干燥8h,得到黑色蓬松状的干凝胶,充分研磨后,将其置于焙烧炉中,程序升温2 h至550℃,恒温8h,自然冷却到室温,制得CeO2-CuO/ZnO/Al2O3,备用。
按照摩尔比n(甲苯二胺):n(乙烯):n(催化剂)=1.1:2.2:0.05,即甲苯二胺、乙烯、催化剂CeO2-CuO/ZnO/Al2O3的摩尔比为1.1:2.2:0.05,在高压釜2中加入10.0 Kg催化剂CeO2-CuO/ZnO/Al2O3,通过稳压阀和单向调节阀通入N2试压至3.0 MPa,30 min内压力不下降即系统密闭性符合要求,通过打料泵3,在1000L 高压反应釜2中投入244.3 Kg 甲苯二胺(TDA)。
通过控制柜1程序升温至180 ℃,充分搅拌30 min。切换H2至3.0 MPa,恒温2 h,对催化剂充分还原。乙烯经压缩后进入高压釜2,置换H2,程序升温至220~230 ℃,反应开始时,系统压力有明显降低现象,持续补充乙烯,维持反应压力3.0 MPa,反应时间3 h。
往高压反应釜2中加入100.0 Kg水,高压反应釜2中的混合物料打到中转罐5,再经精馏进料泵14打入到精馏塔6内,保持精馏塔6内的真空度0.98 MPa和温度198℃条件下,精馏塔6减压蒸馏得到二乙基甲苯二胺(DETDA)。精馏塔6产生的甲苯二胺(TDA)蒸汽通过塔顶全凝器10的冷凝后进入到塔顶储罐12中,塔顶储罐12中的甲苯二胺(TDA)通过循环泵13打入甲苯二胺储罐4,用以循环利用,部分甲苯二胺(TDA)冷凝液通过塔顶回流泵11,进入精馏塔的顶部,确保了精馏塔6的液相回流。精馏塔6底部产品二乙基甲苯二胺(DETDA)经再沸器8的纯化分离后输送至塔底产品储罐9中。部分塔底部气相二乙基甲苯二胺(DETDA),经过再沸器8, 塔底回流泵7,重新回到精馏塔6底部,确保精馏塔的气相回流。精馏塔的液相回流和气相回流,是精馏塔6完成精馏操作的必要条件,选择合适的回流比,进料物系得到完全分离,进而达到精馏操作的目的和要求,计算二乙基甲苯二胺(DETDA)的选择性和收率分别为85.2%、93.7%,适当高效液相色谱条件下,检测二乙基甲苯二胺(DETDA)纯度为99.1%,达到了国家产品质量标准。对CeO2-CuO/ZnO/Al2O3的工艺方案进行综合效益评估发现,3%CeO2掺杂量的CeO2-CuO/ZnO/Al2O3催化活性最高。
采用核磁共振波谱仪对样品二乙基甲苯二胺(DETDA)检测,推断出二乙基甲苯二胺(DETDA) 的氢原子的数目为18,和分子式C11H18N2 相吻合。
Claims (4)
1.一种催化合成二乙基甲苯二胺工艺,步骤如下:
在80 ℃恒温水浴条件下,按照摩尔比n(硝酸铜):n(硝酸锌):n(硝酸铝):n(硝酸铈)= 1.1:2.2:1.0:0.05,配制硝酸铜、硝酸锌、硝酸铝、硝酸铈的水溶液,搅拌0.5 h,按照摩尔比n(柠檬酸):n(硝酸铜+硝酸锌+硝酸铝+硝酸铈)=1.2:1逐滴加入柠檬酸溶液,形成金属络合物溶胶,恒温搅拌5 h,生成凝胶;
将上述的凝胶在100 ℃恒温干燥箱中干燥8 h,得到干凝胶,研磨后,将其置于焙烧炉中,加热2 h程序升温至550 ℃,恒温8 h,自然冷却到室温,制得CeO2-CuO/ZnO/Al2O3;
按照摩尔比n(甲苯二胺):n(乙烯):n(催化剂)=1.1:2.2:0.05,向高压反应釜(2)中加入催化剂CeO2-CuO/ZnO/Al2O3,通过稳压阀和单向调节阀通入N2试压至3.0 MPa,30 min内压力不下降即系统密闭性符合要求,通过打料泵(3),向高压反应釜(2)中投入甲苯二胺(TDA),高压反应釜(2)升温至180 ℃,充分搅拌30 min;2. 切换H2至3.0 MPa,恒温2 h, 对催化剂还原;乙烯经压缩后进入高压反应釜2,置换H2,程序升温至220~230℃,持续补充乙烯,维持反应压力3.0 MPa,反应时间3 h;
向高压反应釜(2)中加入10倍催化剂CeO2-CuO/ZnO/Al2O3质量的水,高压反应釜(2)中的混合物料打到中转罐(5),再经精馏进料泵(14)打入到精馏塔(6)内,保持精馏塔(6)内的真空度0.98 MPa和温度198 ℃条件下,精馏塔(6)减压蒸馏得到二乙基甲苯二胺(DETDA)。
2.如权利要求1所述的一种催化合成二乙基甲苯二胺工艺,其特征在于:精馏塔(6)产生的甲苯二胺(TDA)蒸汽通过塔顶全凝器(10)的冷凝后进入到塔顶储罐(12)中,塔顶储罐(12)中的甲苯二胺(TDA)通过循环泵(13)打入甲苯二胺储罐(4),用以循环利用,甲苯二胺(TDA)冷凝液通过塔顶回流泵(11),进入精馏塔的塔顶储罐(12)中。
3.如权利要求2所述的一种催化合成二乙基甲苯二胺工艺,其特征在于:精馏塔(6)底部产品二乙基甲苯二胺(DETDA)经再沸器(8)的纯化分离后输送至塔底产品储罐(9)中;部分塔底部气相二乙基甲苯二胺(DETDA),经过再沸器(8),塔底回流泵(7),重新回到精馏塔(6)底部,用以确保精馏塔的气相回流。
4.如权利要求1所述的一种催化合成二乙基甲苯二胺工艺,其特征在于:高压反应釜2通入氮气(N2)试压至3.0 MPa,保压时间不少于30 min。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710155403.7A CN106946714B (zh) | 2017-03-16 | 2017-03-16 | 一种二乙基甲苯二胺的合成工艺 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710155403.7A CN106946714B (zh) | 2017-03-16 | 2017-03-16 | 一种二乙基甲苯二胺的合成工艺 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106946714A true CN106946714A (zh) | 2017-07-14 |
CN106946714B CN106946714B (zh) | 2022-03-22 |
Family
ID=59472503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201710155403.7A Expired - Fee Related CN106946714B (zh) | 2017-03-16 | 2017-03-16 | 一种二乙基甲苯二胺的合成工艺 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106946714B (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108727201A (zh) * | 2018-04-24 | 2018-11-02 | 东营海瑞宝新材料有限公司 | 一种基于纳米氧化锌催化剂的二乙基甲苯二胺合成方法 |
CN116239477A (zh) * | 2023-05-11 | 2023-06-09 | 东营海瑞宝新材料有限公司 | 基于碳纳米管铝载体催化剂的二乙基甲苯二胺生产工艺 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4456541A (en) * | 1981-04-24 | 1984-06-26 | Ethyl Corporation | Antioxidant diamine |
US4760185A (en) * | 1984-01-28 | 1988-07-26 | Bayer Aktiengesellschaft | Process for the ortho-alkylation of optionally alkyl-substituted m-phenylenediamines |
US4973759A (en) * | 1988-10-07 | 1990-11-27 | Bayer Aktiengesellschaft | Process for the isolation of alkylated aromatic amines |
US5072047A (en) * | 1989-10-10 | 1991-12-10 | The Dow Chemical Company | Ortho-alkylation of aromatic amines |
US5124483A (en) * | 1989-10-10 | 1992-06-23 | The Dow Chemical Company | Ortho-alkylation of aromatic amines |
JPH05201934A (ja) * | 1992-01-27 | 1993-08-10 | Ihara Chem Ind Co Ltd | m‐フェニレンジアミン類のオルトアルキル化方法 |
CN1161956A (zh) * | 1996-04-11 | 1997-10-15 | 化学工业部黎明化工研究院 | 邻烷基芳香二胺的制备方法 |
CN102603540A (zh) * | 2012-03-14 | 2012-07-25 | 大连理工大学 | 一种二乙基二氨基甲苯的制备方法 |
CN103691442A (zh) * | 2013-12-03 | 2014-04-02 | 辽宁石油化工大学 | 一种合成气制异丁醇催化剂及其制备方法 |
-
2017
- 2017-03-16 CN CN201710155403.7A patent/CN106946714B/zh not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4456541A (en) * | 1981-04-24 | 1984-06-26 | Ethyl Corporation | Antioxidant diamine |
US4760185A (en) * | 1984-01-28 | 1988-07-26 | Bayer Aktiengesellschaft | Process for the ortho-alkylation of optionally alkyl-substituted m-phenylenediamines |
US4973759A (en) * | 1988-10-07 | 1990-11-27 | Bayer Aktiengesellschaft | Process for the isolation of alkylated aromatic amines |
US5072047A (en) * | 1989-10-10 | 1991-12-10 | The Dow Chemical Company | Ortho-alkylation of aromatic amines |
US5124483A (en) * | 1989-10-10 | 1992-06-23 | The Dow Chemical Company | Ortho-alkylation of aromatic amines |
JPH05201934A (ja) * | 1992-01-27 | 1993-08-10 | Ihara Chem Ind Co Ltd | m‐フェニレンジアミン類のオルトアルキル化方法 |
CN1161956A (zh) * | 1996-04-11 | 1997-10-15 | 化学工业部黎明化工研究院 | 邻烷基芳香二胺的制备方法 |
CN102603540A (zh) * | 2012-03-14 | 2012-07-25 | 大连理工大学 | 一种二乙基二氨基甲苯的制备方法 |
CN103691442A (zh) * | 2013-12-03 | 2014-04-02 | 辽宁石油化工大学 | 一种合成气制异丁醇催化剂及其制备方法 |
Non-Patent Citations (1)
Title |
---|
XINWEN GUO等: "Synthesis of Diethyl Toluene Diamine by Zeolite-Catalyzed Ethylation of 2,4-Toluene Diamine", 《IND. ENG. CHEM. RES.》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108727201A (zh) * | 2018-04-24 | 2018-11-02 | 东营海瑞宝新材料有限公司 | 一种基于纳米氧化锌催化剂的二乙基甲苯二胺合成方法 |
CN116239477A (zh) * | 2023-05-11 | 2023-06-09 | 东营海瑞宝新材料有限公司 | 基于碳纳米管铝载体催化剂的二乙基甲苯二胺生产工艺 |
Also Published As
Publication number | Publication date |
---|---|
CN106946714B (zh) | 2022-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106552661B (zh) | 一种氮掺杂碳材料负载钴催化剂及利用其催化加氢还原胺化制备胺类化合物的方法 | |
CN104693038A (zh) | 一种以丙二醇和液氨为原料制备丙二胺的方法及其装置 | |
CN104693037B (zh) | 一种以异丙醇胺和液氨为原料制备1,2‑丙二胺的方法及其装置 | |
CN109748805B (zh) | 液氨法生产异丙醇胺的方法 | |
CN101497572B (zh) | 一种基于反应-分离耦合生产叔丁胺的方法 | |
CN101100433A (zh) | 含微量水低纯三乙醇胺生产工艺方法 | |
CN203033918U (zh) | 一种由合成气间接生产乙醇的工艺系统 | |
CN113024351B (zh) | 一种异丙醇的生产方法 | |
CN105237456A (zh) | 一种吡咯烷酮类产品的生产方法 | |
CN106946714A (zh) | 一种二乙基甲苯二胺的合成工艺 | |
CN111747828A (zh) | 一种乙二醇单丙基醚的制备方法及系统 | |
CN109748804B (zh) | 异丙醇胺的生产方法 | |
CN110218151A (zh) | 一种塔釜闪蒸式热泵反应精馏制备丙酸丙酯的装置和方法 | |
CN102408396A (zh) | 一种叔碳酸缩水甘油酯的制备方法 | |
CN104387340B (zh) | 一种制备n‑甲基哌嗪及其催化剂的方法 | |
CN101684065A (zh) | 一种高效节能的连续化生产二氢月桂烯醇的工艺 | |
CN112876371B (zh) | 能同时生产双(二甲氨基乙基)醚和四甲基乙二胺的方法 | |
CN104447350A (zh) | 一种制备十四碳二元胺及长碳链尼龙pa1414的方法 | |
CN104383949B (zh) | 一种环戊酮合成用催化剂及其制备方法以及在环戊酮合成中的应用 | |
CN104193606A (zh) | 一种合成气制丙酮的工艺 | |
CN104262173B (zh) | 一种由二甘醇低压法合成二甘醇胺的方法 | |
CN107673952A (zh) | 利用生物甘油制备1,2‑丙二醇及正丙醇的方法 | |
CN104230676A (zh) | 一种甲缩醛的制备工艺 | |
CN102850299B (zh) | 一种(甲基)丙烯酸缩水甘油酯的制备方法 | |
CN106366055A (zh) | 一种制备四氢糠醇乙醚的工艺 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220322 |
|
CF01 | Termination of patent right due to non-payment of annual fee |