Method for the hydrogenation of organic compounds in the presence of co and a fixed catalyst bed which contains monolithic shaped catalyst body
A monolithic catalyst and shaped body technology, applied in the preparation of organic compounds, catalyst activation/preparation, organic chemistry, etc.
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[0045] 1. A process for the hydrogenation of a hydrogenatable organic compound in at least one reactor comprising a fixed bed of catalyst comprising or consisting of a monolithic shaped catalyst body comprising at least one catalyst selected from the group consisting of The first element of Ni, Fe, Co, Cu, Cr, Pt, Ag, Au, Pd, Mn, Re, Ru, Rh and Ir, where the CO content in the gas phase in the reactor during hydrogenation is 0.1-10 000 ppm by volume and wherein the catalyst fixed bed comprises catalyst shaped bodies having pores and / or channels, and wherein in any section in a plane normal to the flow direction through the catalyst fixed bed at least 90% of the pores and channels, more Preferably at least 98% of the pores and channels have an area not exceeding 3mm 2 .
[0046] 2. The method according to embodiment 1, wherein the hydrogenatable organic compound is selected from the group having at least one carbon-carbon double bond, carbon-nitrogen double bond, carbon-oxygen ...
Embodiment 1
[0232] Example 1: Hydrogenation of 4-isobutylacetophenone to 1-(4'-isobutylphenyl)ethanol
[0233] A wire mesh in plain weave form (mesh size 0.18 mm and wire diameter 0.112 mm) consisting of aluminum-containing ferritic chromium steel alloyed with yttrium and hafnium and having material number 1.4767 was heat treated in air at 1000° C. for 5 Hour. The carrier screen thus pretreated was then coated with 110 mg copper / m2 (based on the screen area) in an electron beam deposition system. The coated gauze was heated in a muffle furnace at 400°C under air for 0.5 hours to form the catalyst. The catalyst gauze thus produced was used to form monoliths. For this purpose, a part of the wire web is corrugated by means of spiked rollers. The corrugated wire mesh is combined with smooth fabric strips and coiled. This results in a one-piece shaped body that is secured by spot welding. The coil has a diameter of 2.5 cm and a length of 20 cm. The catalyst was reduced for 1 hour at 180°...
Embodiment 2
[0238] Example 2: Hydrogenation of butyne-1,4-diol
[0239] The shaped nickel-aluminum catalyst bodies used in the application examples were prepared on the basis of the examples for the preparation of catalyst foams presented in EP 2 764 916 A1.
[0240] Option a):
[0241] 0.5 g of polyvinylpyrrolidone (molecular weight: 40 000 g / mol) was dissolved in 29.5 g of demineralized water and 20 g of aluminum powder (particle size 75 μm) were added. The resulting mixture was then stirred to obtain a homogeneous suspension. A nickel foam with an average pore size of 580 μm, a thickness of 1.9 mm and a basis weight of 1000 g / m2 was then introduced into the suspension and again vigorously stirred. The foam thus applied was placed on a paper towel and the excess suspension was carefully wiped off. The thus coated foam was heated to 300°C at a heating rate of 5°C / min in a rotary kiln, then kept at 300°C for 30 min under isothermal conditions, further heated to 600°C at 5°C / min, held und...
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Abstract
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