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Precious metal catalysts
We have long been specialized in hydrogenation technology, and the development and production of precious metal catalysts for use in reactions began in the 1950s, and we have succeeded in their industrialization. The precious metal catalysts we manufacture are powdered activated carbon loaded with precious metals such as palladium and platinum, and are used in all kinds of hydrogenation reactions, from pharmaceutical and agrochemical intermediates to specialty chemicals. We also customize catalysts according to the customer's conditions of use and offer contract synthesis services such as hydrogenation reactions using our own industrial facilities. Based on our catalyst preparation technology and hydrogenation know-how accumulated over many years, we can propose the most suitable catalysts and provide consultation on effective catalyst usage.
Palladium Charcoal（Pd/C, Pd on activated carbon）
Pd/C (Pd on activated carbon) is a typical precious metal catalyst with high catalytic activity and is used in far greater quantities and in far more industrial applications than other precious metal catalysts. They are used in a wide range of reactions and in almost all reduction reactions, and are important catalysts in organic synthesis. Characteristic reactions include reduction of alkynes, olefins, and nitro groups, hydrogenation of halogens, and high hydrogenation resolution.
We began research and development of Pd catalysts in the 1950s, and as a result of many years of improvement and applied research, we have come to manufacture and sell the highly active Pd carbon catalysts that we use today.
| Type | Metal Content | Characteristics | Recommended Reaction |
|---|---|---|---|
| M | 5%, 10% | General hydrogenation catalyst. Highly active in a wide range of reactions. |
Nitro, Olefin, Aldehyde, Dehalogenation |
| PH | 5%, 7.5% | It is highly active in many reactions. It is mainly used for debenzylation, nucleic reduction, and hydrogenation of olefins and nitro groups. |
Debenzylation, Aromatic nucleus, Nitro, Olefin |
| AD | 5% | Catalyst with excellent filtration properties. Highly alkaline type, effective for hydrogenation of imine and phenol to cyclohexanone. | Imine, Aromatic nucleus, Olefin, Dehalogenation |
| 10% | Highly washed, low-alkali type catalyst. Effective for nuclear reduction. | Aromatic nucleus | |
| MA | 10% | Neutral to slightly acidic type catalysts. Suitable for reactions on the acidic side and used in nuclear reduction and hydrogenation dehydration reactions. | Aromatic nucleus, Hydrogenolysis |
| EA | 5% | Neutral to slightly acidic, egg-shelled supported type catalyst. Suitable for reactions on the acidic side, and effective for nuclear reduction, hydrogenation dehydration, etc. | Aromatic nucleus, Hydrogenolysis, Nitro, Olefin |
| EB | 5% | Egg-shelled supported catalysts. Especially good for debenzylation and hydrogenation of aldehydes. | Debenzylation, Aldehyde, Nitro, Olefin |
| LA | 5% | Improved EA-type catalyst. Weakly acidic, effective for hydrogenation of nitro groups and olefins under low temperature and low pressure conditions. | Nitro, Olefin, Debenzyloxicalbonation |
| LB | 5% | Improved EB-type catalyst. Weakly basic, effective for hydrogenation and debenzylation of nitro groups and olefins under low temperature and low pressure conditions. | Nitro,Olefin, Debenzylation |
| F | 10% | Special high-purity type with very low amounts of Na, Ca, and Mg in the catalyst. Effective for processes that require purification of byproduct salts. | Aromatic nucleus, olefin, hydrogenolysis |
| Palladium hydroxide Charcoal | 20% | Unreduced type catalyst, also known as Pearlman catalyst. Mainly used for debenzylation reactions. In some cases, hydrogenation can be performed at lower temperatures and pressures than with reduced palladium carbon. | Debenzylation |
Others Catalysts（Pd/C, Pt/C, Ru/C, Rh/C）
| Metals | Type | Metals Content | Characteristics | Characteristics |
|---|---|---|---|---|
| Pd | B | 5% | Palladium on activated carbon catalyst modified by a bismuth compound, which is Pb-free and thus environmentally friendly, and can be used as a substitute for Rindler's catalyst in selective alkyne to alkene reduction reactions. | Selective hydrogenation (Alkynes → Alkenes) |
| Pt | ー | 2%, 5% | General platinum on activated carbon catalyst. It is used for olefin, nitro, aldehyde, ketone, imine, oxime, and aromatic hydrogenation reactions, etc. Unlike palladium catalyst, hydrogenolysis of benzyl compounds such as de-benzylation reaction is unlikely to occur. | Olefin, Nitro, Aldehyde, Ketone, Imine, Oxime, Aromatics nucleus |
| Pt | Sulfur Modified | 3% | Pt catalyst modified by organosulfur compounds. Effective for hydrogenation of nitro groups and olefins with inhibited dehalogenation. | Selective hydrogenation (Non-dehalogenation) |
| Ru | SD | 5% | Characterized by its ability to reduce aromatics, olefins, ketones, carboxylic acids, and esters. Effective for hydrogenation of aliphatic aldehydes and sugars. | Aromatics nucleus, Carbonic acid, Ester |
| Rh | K | 5% | Effective in hydrogenation of nitro groups, oximes, and olefins. Can also be used for the nuclear reduction of heterocyclic compounds such as pyridine. | Nitro, Oxime, Olefin, Aromatics nucleus (Heterocyclic compounds) |
| Rh | N | 5% | Neutral to weakly acidic type catalyst, mainly used for hydrogenation of aromatics. | Nitro, Oxime, Olefin, Aromatics nucleus (Aromatic hydrocarbons) |
Related Products and Information
Flow Reaction Catalysts
We are developing a new precious metal catalyst for flow reaction to reduce pressure loss by utilizing our technology and experience in hydrogenation reaction and catalyst preparation. These catalysts are made by loading precious metals such as palladium and platinum onto particle-size-adjusted or spherical activated carbon, and are as effective for all hydrogenation reactions as conventional powder catalysts used in batch reactions.
Raney Brand of Catalysts
We currently sell W. R. Grace's RANEY® catalysts as a trading company, which catalysts are widely used in various fields such as fine chemicals, foods, oils and fats, and petrochemicals for dehalogenation and dehydrogenation as well as hydrogenation reactions.
