WO1997046505A1 - Verfahren zur herstellung von isocamphyl-cyclohexanolen - Google Patents
Verfahren zur herstellung von isocamphyl-cyclohexanolen Download PDFInfo
- Publication number
- WO1997046505A1 WO1997046505A1 PCT/EP1997/002870 EP9702870W WO9746505A1 WO 1997046505 A1 WO1997046505 A1 WO 1997046505A1 EP 9702870 W EP9702870 W EP 9702870W WO 9746505 A1 WO9746505 A1 WO 9746505A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- weight
- hydr
- isocamphyl
- hydrogen
- catalysts
- 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.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/17—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
- C07C29/19—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds in six-membered aromatic rings
- C07C29/20—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds in six-membered aromatic rings in a non-condensed rings substituted with hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/36—Systems containing two condensed rings the rings having more than two atoms in common
- C07C2602/42—Systems containing two condensed rings the rings having more than two atoms in common the bicyclo ring system containing seven carbon atoms
Definitions
- the invention relates to a continuous process for the preparation of isocamphyl-cyclohexanols from isocamphyl-guaiacol or isocamphyl-phenol
- Isocamphyl-cyclohexanols are components of the industrially produced sandalwood fragrances, which consist of synthetic mixtures of different terpene cyclohexanoi isomers.
- Industrial sandalwood fragrances replace natural sandalwood oil in soaps, cosmetic articles and perfume compositions
- the isocamphyl-guaiacols can be prepared in a known manner by reacting camphene with guaiacol with the aid of acidic catalysts, for example boron trifluoride and acetic acid, and the isocamphyl-guaiacols are then obtained by hydrogenation of the aromatic nucleus and cleavage of the methoxy group transformed into the isocamphyl-cyclohexanols
- powder catalysts can only be loaded to a limited extent and are difficult to remove from the reaction products, which makes their work-up more difficult.
- the invention thus relates to a continuous process for the preparation of isocamphyl-cyclohexanols from compounds which form the carbon skeleton
- Isocamphyl-guaiacols or isocamphyl-phenols have, by hydrogenation with hydrogen at elevated temperature and elevated pressure, characterized gekenn ⁇ characterized in that unsupported molded bodies are used as catalysts, the by reducing moldings from pressed powders of cobalt, manganese and copper (hydr) oxides and optionally one or more (hydr) oxides of the alkaline earth metals.
- the Co fractions are 40 to 65% by weight and the Mn fractions 10 to 20 (calculated as metal in each case)
- the Cu content 0.1 to 0.5% by weight and optionally the alkaline earth metal content (in the case of several in total) 0.2 to 5% by weight of the total (hydr) oxide powder.
- the remainder to 100 wt .-% is oxygen for the compounds in oxidic form.
- Such a catalyst does not need to contain any (hydr) oxides of the alkaline earth metals; however, it preferably has one
- each of these (hydr) oxides is preferably present in an amount which is not less than 20% and not more than 80% of the stated total range from 0.2 to 5% by weight is.
- magnesium, calcium, strontium and barium are particularly suitable, preferably strontium and barium.
- Powders of oxides or hydroxides of the elements mentioned are used to produce the catalysts.
- Oxide powders of the elements mentioned are preferably used. Such powders are mixed mechanically with one another in such proportions that the above-mentioned weight ratios are established. The remainder to 100% by weight is always the proportion of oxygen, and all percentages by weight are based on the total weight of the oxidic, carrier-free shaped body.
- the mixture of powders is then pressed under high pressure on tabletting or pelletizing machines, graphite and / or adhesives also being used in quantities of 0.5 to 1% by weight, based on the total weight of the powders, to improve the adhesion of the powders pressing powder, can be used.
- Examples of the shape of such compacts are tablets, spheres or cylindrical granules with dimensions of 1 to 10 mm, preferably 3 to 7 mm.
- Tableted moldings can also be provided with an axial through-hole to enlarge the outer surface.
- Such molded bodies have a smooth surface from a macroscopic point of view.
- the pressed molded articles have a high compressive strength on the molded article surface.
- tablets or cylindrical granules have a compressive strength of 200 to 800 N / cm 2 , preferably 250 to 600 N / cm 2, on the flat pressing surfaces when using a flat pressure stamp, and tablets, balls or cylindrical granules, a compressive strength on the curved press surfaces of 50 to 200 N (measured as force), preferably 80 to 140 N when using a knife-shaped pressure sensor, the inner surface of the pressed molded body used is 30 to 200 m 2 / g, preferably 80 to 160 m 2 / g.
- the compressive strength of the support-free molded bodies can be determined in accordance with DIN 50 106.
- the internal surface is determined in accordance with FM Nelson and FT Eggertsen, Analyt Chem 30 (1958), S 1387 to 1390 or according to SJ Gregg and KSW Sing, Adsorption Surface Area and Porosity, Academic Press, London 1982, Chap. 2 + 6
- a mixture of isomeric isocamphylcyclohexanols such as 2-hydroxy-1- (5- ⁇ socamphyl) cyclohexane, 3-hydroxy-1, is formed in the process according to the invention from the isocamphyl-guaiacols or isocamphylphenols used - (5-isocamphyl) cyclohexane, 4-hydroxy-1 - (5-isocamphyl) cyclohexane
- the temperature range for the process according to the invention is 140 to 280 ° C., preferably 180 to 260 ° C. It is at a hydrogen pressure of 20 up to 400 bar, preferably 20 to 350 bar, particularly preferably 100 to 300 bar
- the process according to the invention can be carried out continuously in the trickle phase with the catalysts arranged in the fixed bed, during which
- the hydrogenation reactors can be individual high-pressure tubes made of steel or a steel alloy, which are completely or partially filled with the molded bodies, with the use of the carrier-free molded bodies on trays and in wire baskets for larger tube cross sections or similar internals can also be useful. It is also possible to use high-pressure tube bundles within a common jacket, the individual tubes again being wholly or partially filled with the shaped catalyst bodies
- the compressed, unsupported catalysts are reduced by hydrogen and thus activated. This is basically possible simultaneously with the hydrogenation of the starting material used, although a longer run-in phase is required before the catalysts reach their full activity and thus the highest possible space-time yield occurs It is therefore advantageous to pre-catalyst to reduce the feed with starting material.
- This activating reduction with hydrogen is carried out in the temperature range from 180 to 280 ° C. and in the pressure range from 20 to 300 bar.
- the inert gas such as nitrogen, argon, methane or ethane, is initially used here Air-oxygen is completely removed before the inert gas has a share of 10 to
- the inert gas is preferably nitrogen.
- the proportion of inert gas is then steadily reduced and the inert gas is finally removed completely, so that activation is carried out with pure hydrogen and is reduced The reduction is complete when the catalyst does not
- the catalyst loading is 0.05 to 1.0 kg, preferably 0.1 to 0.5 kg, of starting material per liter of catalyst and hour.
- the isocamphyl-guaiacols or isocamphyl-phenols used can be mixed with a suitable inert solvent, for example aliphatic
- the catalysts used according to the invention have a very long service life, so far 12,000 to 15,000 hours have been observed, in which experiments have been stopped without any discernible decrease in activity
- the isocamphyl-cyclohexanols obtained after the hydrogenation without solvent, the isocamphyl-cyclohexanols obtained, after distillative removal of any low boilers formed, can normally be further processed without further purification process, in the case of hydrogenation with solvent after additional distillation of the solvent, but it is also possible to obtain the isocamphyl-cyclohexanols obtained to separate and concentrate by distillation or with other known physical separation methods Examples
- Powders of molded articles produced from cobalt, manganese and copper oxides filled.
- the cobalt content of the tablets was 54% by weight, the manganese content was 15% by weight and the copper content was 0.2% by weight.
- the tablets With a cylinder height of 5 mm and a diameter of 5 mm, the tablets had a compressive strength of 415 N / cm 2 on the flat cylinder surface and of 120 N on the curved one
- the tablets were first dried in a stream of nitrogen for 6 hours (temperature: max. 200 ° C., quantity - 5 Nm N 2 / h).
- the activation was carried out under a nitrogen pressure of 200 bar at a temperature between 180 and 280 ° C., the nitrogen gradually Hydrogen was mixed in, the proportion of which was initially 10 to 15% by volume.
- the portion of the gas in the gas mixture was reduced more and more until pure hydrogen finally flowed through the reactor.
- the activation was complete as soon as no more water of reaction accumulated in the downstream separator
- the hydrogen pressure in the reactor system was increased to 300 bar. Subsequently, 170 g per hour of a 38% by weight solution of a mixture of isocamphyl-guaiacol, as is obtained in the alkylation of camphene with guaiacol, were cycled in cyclohexanol together with 1.5 Nm 3 of hydrogen under a pressure of 300 bar from above pumped down through the high-pressure pipe, the mixture to be hydrogenated being heated to a temperature of 190 ° C. in an upstream electrically heated heat exchanger before entering the high-pressure pipe
- reaction product leaving the reaction tube was brought to a pressure in a second heat exchanger (water cooler) under 300 bar hydrogen pressure
- the cobalt content of the tablets was 53% by weight, the manganese content was 14% by weight, the barium content was 0.9% by weight and the copper content was 0.2% by weight.
- the tablets had a cylinder height of 5 mm and one
- the tablets were first dried in a stream of nitrogen for 6 hours (temperature-max 200 ° C., amount 5 Nm N 2 / h).
- the activation was carried out under a substance pressure of 200 bar at a temperature between 180 and 280 ° C., the nitrogen gradually becoming hydrogen was added, the proportion of which was initially 10 to 15% by volume.
- the nitrogen content of the gas mixture was reduced more and more within 24 hours until pure hydrogen finally flowed through the reactor. ends as soon as no more water of reaction accumulates in the downstream separator.
- the hydrogen pressure in the reactor system was increased to 300 bar.
- 180 g per hour of a 38% by weight solution of a mixture of isocamphyl-guaiacols, as is obtained in the alkylation of camphene with guaiacol were cycled in cyclohexanol together with 1.5 Nm 3 of hydrogen under a pressure of 300 bar from above pumped down through the high-pressure pipe, the mixture to be hydrogenated being heated to a temperature of 210 ° C. in an upstream electrically heated heat exchanger before entering the high-pressure pipe.
- reaction product leaving the reaction tube was cooled to a temperature> 60 ° C. in a second heat exchanger (water cooler) under 300 bar hydrogen pressure and separated from the excess hydrogen in a gas separator, which was returned to the reaction system.
- a second heat exchanger water cooler
- the reaction product was examined under normal pressure using UV spectroscopy.
- the catalyst was unchanged after a running time of 4,026 hours.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10500220A JP2000511552A (ja) | 1996-06-03 | 1997-06-03 | イソカンフィルシクロヘキサノール類の製法 |
| CA002256511A CA2256511A1 (en) | 1996-06-03 | 1997-06-03 | Process for producing isocamphyl cyclohexanoles |
| EP97927114A EP0906259B1 (de) | 1996-06-03 | 1997-06-03 | Verfahren zur herstellung von isocamphyl-cyclohexanolen |
| US09/194,635 US6031140A (en) | 1996-06-03 | 1997-06-03 | Process for producing isocamphyl cyclohexanoles |
| DE59703237T DE59703237D1 (de) | 1996-06-03 | 1997-06-03 | Verfahren zur herstellung von isocamphyl-cyclohexanolen |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19622187.0 | 1996-06-03 | ||
| DE19622187A DE19622187A1 (de) | 1996-06-03 | 1996-06-03 | Verfahren zur Herstellung von Isocamphyl-cyclohexanolen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1997046505A1 true WO1997046505A1 (de) | 1997-12-11 |
Family
ID=7795977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/002870 Ceased WO1997046505A1 (de) | 1996-06-03 | 1997-06-03 | Verfahren zur herstellung von isocamphyl-cyclohexanolen |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6031140A (de) |
| EP (1) | EP0906259B1 (de) |
| JP (1) | JP2000511552A (de) |
| CA (1) | CA2256511A1 (de) |
| DE (2) | DE19622187A1 (de) |
| WO (1) | WO1997046505A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2947545B1 (fr) | 2009-07-03 | 2011-06-10 | Aet Group | Procede continu d'hydrogenation de composes aromatiques |
| CN113244944B (zh) * | 2021-06-16 | 2022-09-27 | 青岛理工大学 | 一种苯酚加氢制环己醇的Co基催化剂及其应用方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014944A (en) * | 1976-03-01 | 1977-03-29 | International Flavors & Fragrances Inc. | Process and product produced by said process |
| DE2921139A1 (de) * | 1979-05-25 | 1980-12-04 | Haarmann & Reimer Gmbh | Ethylether des isocamphyl-guajakols, verfahren zu ihrer herstellung und ihre verwendung zur herstellung von 3- eckige klammer auf isocamphyl-(5) eckige klammer zu -cyclohexanol |
-
1996
- 1996-06-03 DE DE19622187A patent/DE19622187A1/de not_active Withdrawn
-
1997
- 1997-06-03 JP JP10500220A patent/JP2000511552A/ja active Pending
- 1997-06-03 CA CA002256511A patent/CA2256511A1/en not_active Abandoned
- 1997-06-03 WO PCT/EP1997/002870 patent/WO1997046505A1/de not_active Ceased
- 1997-06-03 EP EP97927114A patent/EP0906259B1/de not_active Expired - Lifetime
- 1997-06-03 DE DE59703237T patent/DE59703237D1/de not_active Expired - Fee Related
- 1997-06-03 US US09/194,635 patent/US6031140A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4014944A (en) * | 1976-03-01 | 1977-03-29 | International Flavors & Fragrances Inc. | Process and product produced by said process |
| DE2921139A1 (de) * | 1979-05-25 | 1980-12-04 | Haarmann & Reimer Gmbh | Ethylether des isocamphyl-guajakols, verfahren zu ihrer herstellung und ihre verwendung zur herstellung von 3- eckige klammer auf isocamphyl-(5) eckige klammer zu -cyclohexanol |
Non-Patent Citations (2)
| Title |
|---|
| CHEMICAL ABSTRACTS, vol. 51, no. 21, 10 November 1957, Columbus, Ohio, US; abstract no. 17107c, L.A. KHELFITS, ET AL.: "Industrial method for the manufacture of santalidol" XP002038808 * |
| MASOLBOINO-ZHIROVAYA PROM., vol. 23, no. 6, 1957, pages 35 - 38 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0906259B1 (de) | 2001-03-28 |
| DE59703237D1 (de) | 2001-05-03 |
| JP2000511552A (ja) | 2000-09-05 |
| CA2256511A1 (en) | 1997-12-11 |
| DE19622187A1 (de) | 1997-12-04 |
| EP0906259A1 (de) | 1999-04-07 |
| US6031140A (en) | 2000-02-29 |
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