By Shigeo Nishimura
ISBN-10: 0471396982
ISBN-13: 9780471396987
The main accomplished reference within the box, guide of Heterogeneous Catalytic Hydrogenation for natural Synthesis presents man made chemists and chemical engineers in advantageous chemical compounds and prescribed drugs with particular experimental guidance for heterogeneous catalytic hydrogenation. prepared through sensible teams for prepared reference and that includes certain examples of 1000s of reactions, this guide covers hydrogenations of alkenes, alkynes, aldehydes and ketones, nitriles, imines, nitro and nitroso compounds, carboxylic acids and esters, and fragrant and heterocyclic compounds. additionally, insurance comprises the practise of amines via reductive alkylation and the hydrogenolysis of quite a few compounds. Examples of hydrogenation of practical teams and response pathways are illustrated with various equations and schemes.
Practitioners will enjoy the plenitude of experimental info given for many of the reactions chosen, together with quantities of reagents and catalysts, response temperatures, hydrogen pressures, and response occasions. they'll additionally locate valuable the multiple hundred tables integrated through the publication detailing the results of key components governing expense and selectivity, akin to compound constitution, the character of catalysts and helps, and the character of solvents. Researchers will enjoy the introductory chapters masking an array of hydrogenation catalysts, together with nickel, cobalt, copper, iron, platinum team metals, rhenium, and different oxide and sulfide catalysts, in addition to reactors and response stipulations.
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Additional resources for Handbook of Heterogeneous Catalytic Hydrogenation for Organic Synthesis
Sample text
The chloropalladic acid solution is transferred to a 150-ml beaker with 45 ml of distilled water. 5 by slow addition of aqueous 3M sodium hydroxide. The solution is diluted to approximately 100 ml and placed in a 200- or 250-ml three-necked, round-bottomed flask equipped with a mechanical stirrer and a thermometer. Precipitated calcium carbonate (18 g) is added. The well-stirred suspension is heated to 75–85°C and held 38 HYDROGENATION CATALYSTS at this temperature until all the palladium has precipitated, as indicated by loss of color from the solution; this takes about 15 min.
It is fully washed free of alkali with absolute alcohol and stored under alcohol. 68 g (2 g of Fe) of ferric chloride hexahydrate (FeCl3 ⋅ 6H2O). The mixture is then well stirred with a glass rod. Soon a vigorous exothermic reaction starts, but subsides within about 10 s. To complete the reaction, the mixture is stirred until the color of the ferric ion disappears. 5 PLATINUM GROUP METAL CATALYSTS 29 ml of cold water, and then the washing is removed by filtration or decantation. The precipitated iron is then digested in 330 g of 15% acetic acid with occasional stirring at 60–70°C for about 20–25 min.
26). As in the preparation of N-4 Raney Ni, the Raney Co–Al alloys can be leached to the desired extents without difficulty by developing in the presence of bayerite and a small amount of alkali. 4 and Fig. 1), while the surface area became largest around 80% degree of development. 5 MPa H2 in cyclohexane, while the Raney Ni was several times more active than the Raney Co in the hydrogenation of cyclohexanone in t-butyl alcohol at 40°C and atmospheric hydrogen pressure (see Fig. 1). 100 In this procedure 200 g of 200–300-mesh Raney Co alloy (46% Co) is added in small portions to a solution of 240 g of sodium hydroxide in 960 ml of distilled water; 50 ml of ethanol is added to reduce frothing.
Handbook of Heterogeneous Catalytic Hydrogenation for Organic Synthesis by Shigeo Nishimura
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