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  2. Bosch-Meiser process - Wikipedia

    en.wikipedia.org/wiki/Bosch-Meiser_process

    Urea plant using ammonium carbamate briquettes, Fixed Nitrogen Research Laboratory, ca. 1930 Carl Bosch, 1927. The Bosch–Meiser process is an industrial process, which was patented in 1922 [1] and named after its discoverers, the German chemists Carl Bosch and Wilhelm Meiser [2] for the large-scale manufacturing of urea, a valuable nitrogenous chemical.

  3. Stamicarbon - Wikipedia

    en.wikipedia.org/wiki/Stamicarbon

    Urea. Although urea has a number of industrial uses, these are dwarfed by the scale of its use as a nitrogen fertilizer.Urea has the highest nitrogen content (46 wt-%) of all the recognized solid nitrogen fertilizer materials and, from the early 1950s onwards, its use has continually increased, progressively displacing both ammonium sulphate, which was formerly the dominant product, and a ...

  4. Urea - Wikipedia

    en.wikipedia.org/wiki/Urea

    The structure of the molecule of urea is O=C(−NH 2) 2.The urea molecule is planar when in a solid crystal because of sp 2 hybridization of the N orbitals. [8] [9] It is non-planar with C 2 symmetry when in the gas phase [10] or in aqueous solution, [9] with C–N–H and H–N–H bond angles that are intermediate between the trigonal planar angle of 120° and the tetrahedral angle of 109.5°.

  5. Fertilizer - Wikipedia

    en.wikipedia.org/wiki/Fertilizer

    The radioactive content of the fertilizers varies considerably and depends both on their concentrations in the parent mineral and on the fertilizer production process. [ 94 ] [ 101 ] Uranium-238 concentrations can range from 7 to 100 pCi/g (picocuries per gram) in phosphate rock [ 102 ] and from 1 to 67 pCi/g in phosphate fertilizers.

  6. Petronas Fertiliser Kedah - Wikipedia

    en.wikipedia.org/wiki/Petronas_Fertiliser_Kedah

    Petronas Chemicals Fertiliser Kedah Sdn Bhd (PCF(K)SB) is a Malaysian urea production company and a wholly owned subsidiary of Petronas, located in Kuala Muda District, Kedah. The company is involved in petrochemical manufacturing, mainly producing granular urea for use in local and foreign agricultural industries.

  7. Urea extraction crystallization - Wikipedia

    en.wikipedia.org/wiki/Urea_extraction...

    The urea extraction crystallization is a process for separating linear paraffins (n-paraffins, n-alkanes) from hydrocarbon mixtures through the formation of urea-n-paraffin-clathrates. The process is primarily used to lower the pour point of petroleum products, by-products of the process are n-paraffins in high purity.

  8. Selective non-catalytic reduction - Wikipedia

    en.wikipedia.org/wiki/Selective_non-catalytic...

    Selective non-catalytic reduction (SNCR) is a method to lessen nitrogen oxide emissions in conventional power plants that burn biomass, waste and coal.The process involves injecting either ammonia or urea into the firebox of the boiler at a location where the flue gas is between 1,400 and 2,000 °F (760 and 1,090 °C) to react with the nitrogen oxides formed in the combustion process.

  9. Urea-formaldehyde - Wikipedia

    en.wikipedia.org/wiki/Urea-formaldehyde

    Urea-formaldehyde (UF), also known as urea-methanal, so named for its common synthesis pathway and overall structure, [1] is a nontransparent thermosetting resin or polymer. It is produced from urea and formaldehyde. These resins are used in adhesives, plywood, particle board, medium-density fibreboard (MDF), and molded objects.