Derwent Classification System: Catalysts
| N01-C03 | Other Aluminium compounds not zeolites, aluminosilicates or alumina |
| N06-B03 | Phosphate- or silicophosphate-based molecular sieves |
| N06-C01 | Raney catalysts, alloys e.g. Raney Ni. |
| N06-C02 | Catalytic (coated) electrodes |
| N06-C03 | Catalytic membranes, diaphragms |
| N06-C04 | Homogenous, soluble or liquid phase catalysts |
| N06-C05 | Fixed bed catalyts |
| N06-C06 | Moving, fluidised bed catalysts (attrition resistant) |
| N06-C07 | Nets, meshes, gauzes, frameworks |
| N06-C08 | Bodies or particles with special shape or form |
| N06-E01 | Catalyst preparation, activation, pretreatment |
| N06-E02 | Catalyst regeneration, reactivation |
| N06-E03 | Catalyst recovery (metals, values, ligands) |
| N07-A | General |
| N07-B | Hydrogenation, hydrogenesis, reduction |
| N07-C | Oxidation, dehydrogenation - general or unclassified |
| N07-C01 | Oxidation with O2, air |
| N07-D | Addition/substitution reactions - general or unclassified |
| N07-D01 | Oligomerisation, telomerisation |
| N07-D02 | Addition reactions of CO and/or CO2: general or unclassified |
| N07-D02A | Addition of CO to olefinic bonds: oxo reaction, hydroformylation, etc. |
| N07-D02B | Other addition reactions of CO(2) |
| N07-D03 | Alkylation, arylation, acylation of C-Atoms |
| N07-D04 | Condensation reactions; other C-C chain extension |
| N07-D05 | Hydration, hydroxylation, hydrolysis |
| N07-D06 | Etherification, acetalisation, O- alkylation |
| N07-D07 | Esterification, O- acylation, anhydride formation |
| N07-D08 | Addition of nitrogenous functions - general or unclassified |
| N07-D08A | Amination, N- alkylation |
| N07-D08B | Ammonia-oxidation, ammoxidation |
| N07-D09 | (Hydro)halogenation |
| N07-D10 | Addition of sulphur functions, e.g. sulphonation |
| N07-E | Isomerisation and exchange reactions – general or unclassified |
| N07-E01 | Isomerisation, metathesis, disproportionation of olefinic compounds |
| N07-E02 | Isomerisation reactions of other hydrocarbons; reforming |
| N07-E03 | Transesterification, ether/acetal exchange |
| N07-E04 | Racemisation |
| N07-F01 | Decarboxylation, decarbonylation |
| N07-F02 | Dealkylation, cracking, depolymerisation, other CC bond |
| N07-F03 | De(hydro)halogenation |
| N07-F04 | Ring expansion, contraction cleavage |
| N07-G | Electrocatalytic reactions |
| N07-H | Catalyst use in the reactions of organometallic compounds and metal complexes |
| N07-J | Catalyst use in the reactions of inorganic products |
| N07-K | Other chemical reactions |
| N07-L | Other catalyst applications and uses - unclassified |
| N07-L01 | Purification/waste disposal processes - unclassified |
| N07-L01A | Catalytic combustion/oxidation of waste |
| N07-L01B | Water purification; wastewater treatment |
| N07-L01C | Gas purification; waste gas treatment |
| N07-L01C1 | Engine exhaust treatment |
| N07-L01D | Purification, (hydro)treatment of non-gaseous hydrocarbons |
| N07-L01E | Purification of other substances |
| N07-L02 | Removal/treatment of impurities/compounds - general |
| N07-L02A | Removal/treatment of halogen (compounds) |
| N07-L02B | Removal/treatment of sulphur (compounds) |
| N07-L02C | Removal/treatment of nitrogen (compounds) |
| N07-L02D | Removal/treatment of carbon (compounds) |
| N07-L02E | Removal/treatment of metal (compounds) |
| N07-L02F | Removal/treatment of other impurities/compounds |
| N07-L03 | Other processes/uses; general |
| N07-L03A | Batteries, fuels cells |