WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

C01C　AMMONIA; CYANOGEN; COMPOUNDS THEREOF ({metal hydrides, monoborane, diborane or addition complexes thereof C01B 6/00}; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; azides C01B 21/08; {compounds other than ammonia or cyanogen, containing nitrogen, non-metals and optionally metals C01B 21/082}; metal imides or amides C01B 21/092; nitrites C01B 21/50; {compounds of noble gases C01B 23/0005}; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00)

C01C 1/00 Ammonia; Compounds thereof {(C01C 3/08, C01C 3/14, C01C 3/16, C01C 3/20 take precedence)}

C01C 1/003 ・{Storage or handling of ammonia}

C01C 1/006 ・・{making use of solid ammonia storage materials, e.g. complex ammine salts}

C01C 1/02 ・Preparation, {purification} or separation of ammonia

C01C 1/022 ・・{Preparation of aqueous ammonia solutions, i.e. ammonia water}

C01C 1/024 ・・{Purification}

C01C 1/026 ・・{Preparation of ammonia from inorganic compounds}

C01C 1/028 ・・・{from ammonium sulfate or sulfite}

C01C 1/04 ・・Preparation of ammonia by synthesis {in the gas phase}(preparation or purification of gas mixtures for ammonia synthesis {C01B 3/025})

C01C 1/0405 ・・・{from N2 and H2 in presence of a catalyst}

C01C 1/0411 ・・・・{characterised by the catalyst}

C01C 1/0417 ・・・・{characterised by the synthesis reactor, e.g. arrangement of catalyst beds and heat exchangers in the reactor (arrangement of severaL reactors C01C 1/0405; fixed-bed reactors in general B01J 8/02)}

C01C 1/0423 ・・・・・{Cold wall reactors}

C01C 1/0429 ・・・・・{Fluidized or moving bed reactors}

C01C 1/0435 ・・・・・{Horizontal reactors}

C01C 1/0441 ・・・・・{Reactors with the catalyst arranged in tubes}

C01C 1/0447 ・・・・{Apparatus other than synthesis reactors}

C01C 1/0452 ・・・・・{Heat exchangers}

C01C 1/0458 ・・・・{Separation of NH3 (during purge gas treatment C01C 1/0476)}

C01C 1/0464 ・・・・・{by absorption in liquids, e.g. water}

C01C 1/047 ・・・・・{by condensation}

C01C 1/0476 ・・・・{Purge gas treatment, e.g. for removal of inert gases or recovery of H2}

C01C 1/0482 ・・・・{Process control; Start-up or cooling-down procedures}

C01C 1/0488 ・・・・{Processes integrated with preparations of other compounds, e.g. methanol, urea or with processes for power generation}

C01C 1/0494 ・・・{using plasma or electric discharge}

C01C 1/08 ・・Preparation of ammonia from nitrogenous organic substances

C01C 1/083 ・・・{from molasses (treatment of molasses in general C13J)}

C01C 1/086 ・・・{from urea}

C01C 1/10 ・・Separation of ammonia from ammonia liquors, e.g. gas liquors {(as part of the ammonia synthesis process C01C 1/04)}

C01C 1/12 ・・Separation of ammonia from gases and vapours {(as part of the ammonia synthesis process C01C 1/04)}

C01C 1/14 ・・・Saturators

C01C 1/16 ・Halides of ammonium

C01C 1/162 ・・{Ammonium fluoride}

C01C 1/164 ・・{Ammonium chloride}

C01C 1/166 ・・{Ammonium bromide}

C01C 1/168 ・・{Ammonium iodide}

C01C 1/18 ・Nitrates of ammonium

C01C 1/185 ・・{Preparation}

C01C 1/20 ・Sulfides; Polysulfides

C01C 1/22 ・Sulfites of ammonium

C01C 1/24 ・Sulfates of ammonium (C01C 1/14 takes precedence)

C01C 1/242 ・・Preparation from ammonia and sulfuric acid or sulfur trioxide

C01C 1/244 ・・Preparation by double decomposition of ammonium salts with sulfates

C01C 1/245 ・・Preparation from compounds containing nitrogen and sulfur

C01C 1/246 ・・・from sulfur-containing ammonium compounds

C01C 1/247 ・・・・by oxidation with free oxygen

C01C 1/248 ・・Preventing coalescing or controlling form or size of the crystals

C01C 1/249 ・・Deacidifying {or drying} the crystals

C01C 1/26 ・Carbonates or bicarbonates of ammonium

C01C 1/28 ・Methods of preparing ammonium salts in general

C01C 3/00 Cyanogen; Compounds thereof

C01C 3/001 ・{Preparation by decomposing nitrogen-containing organic compounds, e.g. molasse waste or urea (by distillation of carbamates C01C 3/02, C01C 3/08, C01C 3/14, C01C 3/16; by decomposing formamide or ammonium formate C01C 3/0204)}

C01C 3/002 ・{Synthesis of metal cyanides or metal cyanamides from elementary nitrogen and carbides}

C01C 3/003 ・{Cyanogen}

C01C 3/004 ・{Halogenides of cyanogen}

C01C 3/005 ・{Thiocyanogen}

C01C 3/006 ・{Sulfurdicyanide}

C01C 3/007 ・{Ammonium cyanide}

C01C 3/008 ・{Cyanazide}

C01C 3/02 ・Preparation, {separation or purification} of hydrogen cyanide {(C01C 3/001 takes precedence)}

C01C 3/0204 ・・{from formamide or from ammonium formate}

C01C 3/0208 ・・{Preparation in gaseous phase}

C01C 3/0212 ・・・{from hydrocarbons and ammonia in the presence of oxygen, e.g. the Andrussow-process}

C01C 3/0216 ・・・・{characterised by the catalyst used}

C01C 3/022 ・・・・{Apparatus therefor}

C01C 3/0225 ・・・・・{characterised by the synthesis reactor}

C01C 3/0229 ・・・{from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process}

C01C 3/0233 ・・・・{making use of fluidised beds, e.g. the Shawinigan-process}

C01C 3/0237 ・・・{from carbon monoxide and ammonia}

C01C 3/0241 ・・・{from alcohols or aldehydes}

C01C 3/0245 ・・・{from organic nitriles, e.g. acetonitrile}

C01C 3/025 ・・・{by using a plasma}

C01C 3/0254 ・・{from cyanates or from thiocyanates}

C01C 3/0258 ・・{from cyanamides or derivatives thereof}

C01C 3/0262 ・・{from cyanides}

C01C 3/0266 ・・・{from simple alkali or alkaline earth metal cyanides}

C01C 3/027 ・・・・{Alkali metal cyanides}

C01C 3/0275 ・・・・{Alkaline earth metal cyanides}

C01C 3/0279 ・・・{from ammonium cyanide}

C01C 3/0283 ・・・{from simple or complex cyanides of the noble metals}

C01C 3/0287 ・・・{from simple or complex cyanides of other transition metals, e.g. from iron cyanides}

C01C 3/0291 ・・・{from simple or complex cyanides of other metals}

C01C 3/0295 ・・{Purification}

C01C 3/04 ・・Separation from gases

C01C 3/06 ・Stabilisation of hydrogen cyanide

C01C 3/08 ・Simple or complex cyanides of metals {(C01C 3/001, C01C 3/002 take precedence)}

C01C 3/10 ・・Simple alkali metal cyanides

C01C 3/11 ・・Complex cyanides

C01C 3/12 ・・Simple or complex iron cyanides

C01C 3/14 ・Cyanic {or isocyanic} acid; Salts thereof {(C01C 3/001 takes precedence)}

C01C 3/145 ・・{Isocyanic acid; Salts thereof}

C01C 3/16 ・Cyanamide; Salts thereof ({C01C 3/001, C01C 3/002 takes precedence}; dicyandiamide C07C 279/28)

C01C 3/18 ・・Calcium cyanamide

C01C 3/20 ・Thiocyanic acid; Salts thereof {(C01C 3/001 takes precedence)}