A process for intensifying the roasting of ores in superposed hearth furnaces by recycling the combustion gases
ES235043A1
Improvements in intense tastation ovens for gas stages and reintroduction (Machine-translation by Google Translate, not legally binding)
GB839985A
Electronic oscillator for dielectric heating
GB819786A
An improved method of and apparatus for manufacturing sulphuric acid by the contact process
GB819785A
Improved method of and apparatus for bringing gas and liquid into intimate contact
ES223903A1
A perfect procedure and installation for the obtaining of sulfuric acid by contact (Machine-translation by Google Translate, not legally binding)
ES223863A1
A procedure to put into intimate contact a gas with a liquid, mediate centrifugal washer-vacuum cleaner (Machine-translation by Google Translate, not legally binding)
GB651404A
Improvements in the construction of apparatus for heating gases in contact installations for the catalytic production of various products
GB625125A
Improvements in the construction of roller crushers
