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US2617860A
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Air ionizing device for air conditioning purposes
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US2681432A
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Device for producing high-tension currents of low current intensity
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GB644264A
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Improvements in or relating to apparatus for improving the biological properties of air in rooms
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US2526178A
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Arrangement for improving the biological properties of air in rooms
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GB539932A
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Process for the preparation of ammonium nitrate and installation for carrying out this process
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ES146172A1
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A procedure with the corresponding installation for the preservation of nitrous gases, especially from the combustion of ammonia in nitric acid.
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GB505620A
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Absorption apparatus for the working up of the nitrous gases of the ammonia combustion to nitric acid
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ES139241A1
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A procedure to obtain nitric acid of high concentration, starting from diluted nitric acid.
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DE657192C
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Production of highly concentrated nitric acid from diluted nitric acid
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ES131410A1
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A procedure for the recovery of compression work in the manufacture of nitric acid under pressure.
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ES129893A1
|
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A procedure to obtain mechanical work in a thermal machine, using the latent energy of chemical substances.
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ES129738A1
|
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A process for neutralizing calcium nitrate acidic lye in the manufacture of lime nitrate.
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GB419805A
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A method of obtaining mechanical work in heat engines by utilising the latent energy of chemical substances
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DE622726C
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Process for the complete or almost complete recovery of the compression work in the production of nitric acid under pressure
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GB333477A
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Improvements in and relating to the production of materials containing phosphorus and nitrogen suitable for use as fertilisers
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