DE2118369C3 - Verfahren zur Herstellung von N-Arylhydroxylaminen - Google Patents
Verfahren zur Herstellung von N-ArylhydroxylaminenInfo
- Publication number
- DE2118369C3 DE2118369C3 DE2118369A DE2118369A DE2118369C3 DE 2118369 C3 DE2118369 C3 DE 2118369C3 DE 2118369 A DE2118369 A DE 2118369A DE 2118369 A DE2118369 A DE 2118369A DE 2118369 C3 DE2118369 C3 DE 2118369C3
- Authority
- DE
- Germany
- Prior art keywords
- dmso
- catalyst
- hydrogen
- hydrogenation
- aromatic nitro
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 title claims description 15
- 230000008569 process Effects 0.000 title claims description 7
- 238000002360 preparation method Methods 0.000 title claims description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 79
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 24
- 229910052739 hydrogen Inorganic materials 0.000 claims description 24
- 239000001257 hydrogen Substances 0.000 claims description 24
- 239000003054 catalyst Substances 0.000 claims description 21
- -1 aromatic nitro compound Chemical class 0.000 claims description 19
- 229910052697 platinum Inorganic materials 0.000 claims description 17
- 230000009467 reduction Effects 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 10
- 239000012298 atmosphere Substances 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- JUWSSMXCCAMYGX-UHFFFAOYSA-N gold platinum Chemical compound [Pt].[Au] JUWSSMXCCAMYGX-UHFFFAOYSA-N 0.000 claims 1
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 20
- 238000005984 hydrogenation reaction Methods 0.000 description 17
- 239000000047 product Substances 0.000 description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 238000010521 absorption reaction Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 8
- 235000019441 ethanol Nutrition 0.000 description 8
- CKRZKMFTZCFYGB-UHFFFAOYSA-N N-phenylhydroxylamine Chemical class ONC1=CC=CC=C1 CKRZKMFTZCFYGB-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000007792 addition Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 150000005181 nitrobenzenes Chemical class 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000543 intermediate Substances 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical class NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 150000001448 anilines Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HFZKOYWDLDYELC-UHFFFAOYSA-N 1,2-dimethyl-4-nitrobenzene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1C HFZKOYWDLDYELC-UHFFFAOYSA-N 0.000 description 1
- FRPQAVXDUWMFCK-UHFFFAOYSA-N 1-(3-nitrophenyl)ethanol Chemical compound CC(O)C1=CC=CC([N+]([O-])=O)=C1 FRPQAVXDUWMFCK-UHFFFAOYSA-N 0.000 description 1
- ARKIFHPFTHVKDT-UHFFFAOYSA-N 1-(3-nitrophenyl)ethanone Chemical compound CC(=O)C1=CC=CC([N+]([O-])=O)=C1 ARKIFHPFTHVKDT-UHFFFAOYSA-N 0.000 description 1
- KMAQZIILEGKYQZ-UHFFFAOYSA-N 1-chloro-3-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1 KMAQZIILEGKYQZ-UHFFFAOYSA-N 0.000 description 1
- ASXDLWJNLAXOEA-UHFFFAOYSA-N 1-chloro-5-nitronaphthalene Chemical compound C1=CC=C2C([N+](=O)[O-])=CC=CC2=C1Cl ASXDLWJNLAXOEA-UHFFFAOYSA-N 0.000 description 1
- YFZHODLXYNDBSM-UHFFFAOYSA-N 1-ethenyl-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(C=C)C=C1 YFZHODLXYNDBSM-UHFFFAOYSA-N 0.000 description 1
- LFOLBPDHVGDKGJ-UHFFFAOYSA-N 1-ethoxy-3-nitrobenzene Chemical compound CCOC1=CC=CC([N+]([O-])=O)=C1 LFOLBPDHVGDKGJ-UHFFFAOYSA-N 0.000 description 1
- WFQDTOYDVUWQMS-UHFFFAOYSA-N 1-fluoro-4-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(F)C=C1 WFQDTOYDVUWQMS-UHFFFAOYSA-N 0.000 description 1
- RJKGJBPXVHTNJL-UHFFFAOYSA-N 1-nitronaphthalene Chemical compound C1=CC=C2C([N+](=O)[O-])=CC=CC2=C1 RJKGJBPXVHTNJL-UHFFFAOYSA-N 0.000 description 1
- RMBFBMJGBANMMK-UHFFFAOYSA-N 2,4-dinitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O RMBFBMJGBANMMK-UHFFFAOYSA-N 0.000 description 1
- PXNJGLAVKOXITN-UHFFFAOYSA-N 2-(4-nitrophenyl)acetonitrile Chemical compound [O-][N+](=O)C1=CC=C(CC#N)C=C1 PXNJGLAVKOXITN-UHFFFAOYSA-N 0.000 description 1
- IKMXRUOZUUKSON-UHFFFAOYSA-N 2-(4-nitrophenyl)ethanol Chemical compound OCCC1=CC=C([N+]([O-])=O)C=C1 IKMXRUOZUUKSON-UHFFFAOYSA-N 0.000 description 1
- CFBYEGUGFPZCNF-UHFFFAOYSA-N 2-nitroanisole Chemical compound COC1=CC=CC=C1[N+]([O-])=O CFBYEGUGFPZCNF-UHFFFAOYSA-N 0.000 description 1
- XAWCLWKTUKMCMO-UHFFFAOYSA-N 2-nitroethylbenzene Chemical compound [O-][N+](=O)CCC1=CC=CC=C1 XAWCLWKTUKMCMO-UHFFFAOYSA-N 0.000 description 1
- KDKCEPVMXOUFJD-UHFFFAOYSA-N 3-methyl-5-nitrophenol Chemical compound CC1=CC(O)=CC([N+]([O-])=O)=C1 KDKCEPVMXOUFJD-UHFFFAOYSA-N 0.000 description 1
- RUSAWEHOGCWOPG-UHFFFAOYSA-N 3-nitrobenzonitrile Chemical compound [O-][N+](=O)C1=CC=CC(C#N)=C1 RUSAWEHOGCWOPG-UHFFFAOYSA-N 0.000 description 1
- ZXVONLUNISGICL-UHFFFAOYSA-N 4,6-dinitro-o-cresol Chemical group CC1=CC([N+]([O-])=O)=CC([N+]([O-])=O)=C1O ZXVONLUNISGICL-UHFFFAOYSA-N 0.000 description 1
- TYMLOMAKGOJONV-UHFFFAOYSA-N 4-nitroaniline Chemical compound NC1=CC=C([N+]([O-])=O)C=C1 TYMLOMAKGOJONV-UHFFFAOYSA-N 0.000 description 1
- JKTYGPATCNUWKN-UHFFFAOYSA-N 4-nitrobenzyl alcohol Chemical compound OCC1=CC=C([N+]([O-])=O)C=C1 JKTYGPATCNUWKN-UHFFFAOYSA-N 0.000 description 1
- BTJIUGUIPKRLHP-UHFFFAOYSA-N 4-nitrophenol Chemical compound OC1=CC=C([N+]([O-])=O)C=C1 BTJIUGUIPKRLHP-UHFFFAOYSA-N 0.000 description 1
- ZPTVNYMJQHSSEA-UHFFFAOYSA-N 4-nitrotoluene Chemical compound CC1=CC=C([N+]([O-])=O)C=C1 ZPTVNYMJQHSSEA-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- GDEBSAWXIHEMNF-UHFFFAOYSA-O cupferron Chemical compound [NH4+].O=NN([O-])C1=CC=CC=C1 GDEBSAWXIHEMNF-UHFFFAOYSA-O 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002443 hydroxylamines Chemical class 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- WHEWNUKTGUEMKA-UHFFFAOYSA-N n-(4-ethylphenyl)hydroxylamine Chemical compound CCC1=CC=C(NO)C=C1 WHEWNUKTGUEMKA-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 150000003058 platinum compounds Chemical class 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D261/00—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings
- C07D261/02—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings
- C07D261/04—Heterocyclic compounds containing 1,2-oxazole or hydrogenated 1,2-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2905570A | 1970-04-16 | 1970-04-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2118369A1 DE2118369A1 (de) | 1971-10-28 |
| DE2118369B2 DE2118369B2 (de) | 1980-02-28 |
| DE2118369C3 true DE2118369C3 (de) | 1980-10-30 |
Family
ID=21846966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2118369A Expired DE2118369C3 (de) | 1970-04-16 | 1971-04-15 | Verfahren zur Herstellung von N-Arylhydroxylaminen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3694509A (enExample) |
| JP (1) | JPS5346828B1 (enExample) |
| CA (1) | CA987680A (enExample) |
| DE (1) | DE2118369C3 (enExample) |
| FR (1) | FR2089692A5 (enExample) |
| GB (1) | GB1320270A (enExample) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3903167A (en) * | 1971-03-04 | 1975-09-02 | Texaco Inc | Homogeneous ruthenium catalysts useful in the selective reduction of nitroaromatics to amines |
| US3906045A (en) * | 1971-03-04 | 1975-09-16 | Texaco Inc | Homogeneous ruthenium catalysts useful in the selective reduction of nitroaromatics to amines |
| US3897499A (en) * | 1971-10-08 | 1975-07-29 | Degussa | Hydrogenation of chloronitrobenzenes using noble metal catalysts treated with a sulfoxide and a hydrazine |
| US3927101A (en) * | 1973-05-29 | 1975-12-16 | Rhone Poulenc Sa | Process for the preparation of hydroxylamines by hydrogenation of aromatic nitro derivatives |
| FR2252337B1 (enExample) * | 1973-11-26 | 1976-10-01 | Rhone Poulenc Ind | |
| ZA83304B (en) * | 1982-01-29 | 1983-10-26 | Mallinckrodt Inc | Process for the preparation of arylhydroxylamines |
| US4415753A (en) * | 1982-01-29 | 1983-11-15 | Mallinckrodt, Inc. | Process for preparing p-aminophenol and alkyl substituted p-aminophenol |
| US4571437A (en) * | 1982-01-29 | 1986-02-18 | Mallinckrodt, Inc. | Process for preparing p-aminophenol and alkyl substituted p-aminophenol |
| US4375559A (en) * | 1982-07-15 | 1983-03-01 | Air Products And Chemicals, Inc. | Process for the production of hydrazoaromatics using a multi-phase system |
| US4627436A (en) * | 1984-03-01 | 1986-12-09 | Innoventions Biomedical Inc. | Angioplasty catheter and method for use thereof |
| US4723030A (en) * | 1985-08-05 | 1988-02-02 | General Electric Company | Moderated reduction reactions for producing arylhydroxylamines |
| JP2975480B2 (ja) * | 1992-06-08 | 1999-11-10 | シャープ株式会社 | 加熱式記録装置 |
| HRP940123A2 (en) * | 1994-02-21 | 1997-04-30 | Sour Pliva | New hydroxylamines with hypoglycemic activity |
| DE19610571A1 (de) * | 1996-03-18 | 1997-09-25 | Basf Ag | Verfahren und Zwischenprodukte zur Herstellung von Pyridyl-4-Fluoranilinen |
| DE19753462A1 (de) | 1997-12-02 | 1999-06-10 | Consortium Elektrochem Ind | Verfahren zur Herstellung organischer Hydroxylamine |
| US7017161B1 (en) | 1999-10-11 | 2006-03-21 | Dictaphone Corporation | System and method for interfacing a radiology information system to a central dictation system |
| EP1593668A4 (en) * | 2003-02-14 | 2007-07-11 | Wako Pure Chem Ind Ltd | METHOD FOR PRODUCING A HYDROXYLAMINE COMPOUND USING A PLATINATE CATALYST IMMOBILIZED ON AN ION EXCHANGE RESIN |
| JP5425619B2 (ja) * | 2007-03-27 | 2014-02-26 | 和光純薬工業株式会社 | アリールヒドロキシルアミンの製造法 |
| CN104098485A (zh) * | 2014-05-26 | 2014-10-15 | 张家港威胜生物医药有限公司 | 一种邻氨基苯羟胺的制备方法 |
| US10377720B2 (en) | 2015-05-14 | 2019-08-13 | Adama Makhteshim Ltd. | Process for preparing a hydroxylamine pyrazole compound |
| CN114471540B (zh) * | 2022-02-22 | 2023-08-08 | 北京化工大学 | 一种亚纳米Pt选择性加氢催化剂、制备方法及其应用 |
| CN118988370B (zh) * | 2024-08-06 | 2025-04-01 | 厦门嘉氢科技有限公司 | 一种应用于硝基选择性加氢制羟胺催化剂的制备工艺及其应用 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2894036A (en) * | 1956-02-06 | 1959-07-07 | Gen Aniline & Film Corp | Catalytic reduction of aromatic polynitro compounds |
| US3491151A (en) * | 1967-07-11 | 1970-01-20 | Polaroid Corp | Preparation of alkylated hydroxylamines |
-
1970
- 1970-04-16 US US29055A patent/US3694509A/en not_active Expired - Lifetime
-
1971
- 1971-04-14 CA CA110,305A patent/CA987680A/en not_active Expired
- 1971-04-15 FR FR7113304A patent/FR2089692A5/fr not_active Expired
- 1971-04-15 DE DE2118369A patent/DE2118369C3/de not_active Expired
- 1971-04-15 JP JP2423671A patent/JPS5346828B1/ja active Pending
- 1971-04-19 GB GB2714871*A patent/GB1320270A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA987680A (en) | 1976-04-20 |
| US3694509A (en) | 1972-09-26 |
| DE2118369B2 (de) | 1980-02-28 |
| JPS5346828B1 (enExample) | 1978-12-16 |
| GB1320270A (en) | 1973-06-13 |
| FR2089692A5 (enExample) | 1972-01-07 |
| DE2118369A1 (de) | 1971-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| OI | Miscellaneous see part 1 | ||
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |