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Chematur

The two procedures primarily used for continuous nitration are the semicontinuous method developed by Bofors-Nobel Chematur of Sweden and the continuous method of Hercules Powder Co. in the United States. The latter process, which uses a multiple cascade system for nitration and a continuous wringing operation, increases safety, reduces the personnel involved, provides a substantial reduction in pollutants, and increases the uniformity of the product. The cellulose is automatically and continuously fed into the first of a series of pots at a controlled rate. It falls into the slurry of acid and nitrocellulose and is submerged immediately by a turbine-type agitator. The acid is deflvered to the pots from tanks at a rate controlled by appropriate instmmentation based on the desired acid to cellulose ratio. The slurry flows successively by gravity from the first to the last of the nitration vessels through under- and overflow weirs to ensure adequate retention time during nitration. The overflow from the last pot is fully nitrated cellulose. [Pg.14]

D. G. Klim a, personal communication, Chematur Engiaeeriag, Kadskoga, Sweden, 1993. [Pg.37]

Diagram of a System of Nitrators and Separators in the Chematur Method of... [Pg.12]

The Swedish-Norwegian continuous process and the Hercules process are discussed below Swedish-Norwegian Chematur and Norsk Spraengstoffindustri Continuous Process This process, patented in Sweden in 1953 (Ref 42), employes stepwise nitration of mono- and/or di-nitrotoluene to trinitrotoluene in a series of counter-current units, each unit consisting of a nitrator and a separator... [Pg.234]

Biostil A continous fermentation process for making ethanol. Developed by Chematur Engineering AB, Sweden. [Pg.40]

Polyad [Polymer adsorbent] Also written POLYAD. A family of processes for removing volatile organic compounds from air streams by continuous adsorption on an adsorbent and desorption with hot air. Several adsorbents are used, depending on the sorbate, including a macroporous polymer ( Bonopore ). Used for control of emissions and for solvent recovery. COMBI-AD is a variant for simultaneously removing several solvents, using two different adsorbents. Developed and offered by Chematur Engineering, Sweden. Twelve units had been installed, in several countries, by 1995. [Pg.213]

Weatherly, Inc./Chematur Engineering Supercritical Water Oxidation Abstract... [Pg.1123]

Weatherly, Inc., developed the supercritical water oxidation (SCWO) system to treat liquid organic wastes. In February, 1999, Chematur Engineering acquired the exclusive rights to the... [Pg.1123]

The plant is built to be very flexible and to have the possibility to handle different wastes, including sludges and dispersed solids. Chematur has a licence on Japan, Shinko-Pantec Kobe. This company has built a large plant, 1.3 m3/h, to treat of sewage sludge. [Pg.523]

The treatment cost is also heavily dependent on the capital cost. Chematur has evaluated the treatment-cost for the Aqua Critox process as between 36 /Ton, for fine chemicals wastewater (3.6 MT/h), and 96 /Ton, for industrial sludges (1 MT/h). For de- inking sludge the treatment cost could be as low as 9 /Ton after the income from recovered paper filler is deducted. [Pg.524]

Serious consideration was given to the continuous manuf of TNT in the USA in 1953 (Ref 2). The known European continuous processes, seven in all, were studied and compared, and the Bofors Norell process was selected as clearly the best. This procedure entailed nitric acid crystn for purification of the crude TNT, as discussed below under Purification . A second study group again compared available continuous processes in 1967 (Ref 6). They selected the Swedish Nobel-Chematur Process as modified by Canadian Industries Ltd, using Na sulfite for the purification step. After still further modification, three lines based on this concept were installed at Radford AAP, and operation was... [Pg.730]

Chematur Engineering AB, Karlskoga, Sweden, has acquired the exclusive worldwide rights to Eco Waste SCWO technologies and the process is demonstrated under the trade name Aqua Critox. [Pg.155]

Swedish-Norwegian Chematur and Norsk SpraengstofTindustri method... [Pg.371]

Fig. 91. Diagram of a system of nitrators (N) and separators (S) in the Chematur method of continuous manufacture of TNT [22],... Fig. 91. Diagram of a system of nitrators (N) and separators (S) in the Chematur method of continuous manufacture of TNT [22],...
Aqua Critox A plug-flow SCWO system for destroying organic wastes in water. Developed by Chematur Engineering in Sweden and first installed in Johnson Matthey s Brimsdown, UK, plant... [Pg.22]

Technologies (acquired by Chematur 1999) Chemical USA N-containing hydrocarbons, ISOOkgh ... [Pg.209]

Chematur AquaCritox process (pilot scale) Sweden N-containing wastes, 250kgh 1998... [Pg.209]

Bofors-Chematur continuous method Low temperature process for TNT manufacture Manufacture of TNT in the US. A. during World War II One-stage Nitration of toluene Two-stage process of nitration Three-stage process Direct nitration process Purification of crude TNT Soda-ash process Ammoniacal sellite process Alkaline sellite method... [Pg.6]

Structure of cellulose polymer and determination of molecular weight Pyrolysis of nitrocellulose Thcrmochemical properties of nitrocellulose Mixed esters nitrates and sulphates Stabilization of nitrocellulose Knccht compound Manufacture of nitrocellulose Semi-continuous methodof Bofors-Nobel-Chematur Drying of nitrocellulose Safety in the manufacture of nitrocellulose Starch nitrates (nitrosiarch)... [Pg.8]

BOFORS NOBEL-CHEMATUR METHOD OF NITRATING BENZE.NE AND TOLUENE TO MONONITRO PRODUCTS (FIG 20l 32 ... [Pg.87]

The following is the material balance given by Bofors-Nobel-Chematur I Table... [Pg.87]


See other pages where Chematur is mentioned: [Pg.18]    [Pg.34]    [Pg.34]    [Pg.1553]    [Pg.234]    [Pg.236]    [Pg.236]    [Pg.238]    [Pg.270]    [Pg.64]    [Pg.165]    [Pg.523]    [Pg.420]    [Pg.154]    [Pg.393]    [Pg.647]    [Pg.1375]    [Pg.237]    [Pg.237]    [Pg.239]    [Pg.271]    [Pg.87]   
See also in sourсe #XX -- [ Pg.371 , Pg.374 , Pg.375 ]




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Swedish-Norwegian Chematur and Norsk

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