SU327801A1
(fr )
1974-08-25
US1971563A
(en )
1934-08-28
Process for manufacture of ammonium phosphates and other salts
GB785561A
(en )
1957-10-30
Regeneration of ammonia-sulphur dioxide cooking acid used in production of wood pulp
US2341887A
(en )
1944-02-15
Cooling of sulphur dioxide gases
US1808465A
(en )
1931-06-02
Production of urea
US1949129A
(en )
1934-02-27
Process for the conversion of the gypsum contained in superphosphate into ammonium sulphate
US1638492A
(en )
1927-08-09
Method for the production of anhydrous sodium bisulphite
US1865303A
(en )
1932-06-28
Production of nitrate of lime
US2861878A
(en )
1958-11-25
Manufacture of complex fertilizers
US1246636A
(en )
1917-11-13
Method of treating phosphate-rock.
ATE25242T1
(de )
1987-02-15
Verfahren zum phlegmatisieren von wasserunloeslichen peroxycarbonsaeuren.
US3421848A
(en )
1969-01-14
Process for the advantageous utilization of so2 and nh3 from the production of nitrogen and phosphatic fertilizers
US1758449A
(en )
1930-05-13
Ammonium-sulphate manufacture
US2047546A
(en )
1936-07-14
Process for making mixed nitric and sulphuric acids
US2014775A
(en )
1935-09-17
Process of preparing sulfite cooking liquor
GB339340A
(en )
1930-12-04
Improvements in and relating to the treatment of phosphate rock and the like
US2793935A
(en )
1957-05-28
Manufacture of sulfuric acid
US1360046A
(en )
1920-11-23
Method of making potassium carbonate
US1760990A
(en )
1930-06-03
Manufacture of concentrated fertilizer material
SU60405A1
(ru )
1941-06-30
Способ получени суперфосфата
ES205545A1
(es )
1953-01-16
UN PROCEDIMIENTO PERFECCIONADO PARA LA FABICACIoN INTENSIVA DE áCIDO SULFuRICO
GB356627A
(en )
1931-09-10
Method of leaching phosphate rock
GB1094539A
(en )
1967-12-13
A new or improved method of manufacturing phosphoric acid
US1662489A
(en )
1928-03-13
Phosphorus material
GB353763A
(en )
1931-07-30
Improvements in and relating to the manufacture of fertilisers