US20230174379A1
(en )
2023-06-08
Process and device for recovering phosphorus from sewage sludge
BE441409A
(instruction )
EP0097163A1
(en )
1984-01-04
Process for the recovery of oil from shale
CN101903504B
(zh )
2013-06-12
燃烧方法
US4396432A
(en )
1983-08-02
Process for converting coal to gaseous fuel with production of Portland cement as a by-product
RU2422538C2
(ru )
2011-06-27
Способ металлургической многоцелевой газификации твердого топлива
FR2797628A1
(fr )
2001-02-23
Methode de production d'un clinker de ciment portland en utilisant une chaudiere a lit fluidise en circulation
US2141768A
(en )
1938-12-27
Manufacture of carbon bisulphide
FR2496125A1
(fr )
1982-06-18
Procede de recuperation d'un metal a partir d'une matiere contenant un sulfure dudit metal
US690502A
(en )
1902-01-07
Method of making hydrogen sulfid.
US1842230A
(en )
1932-01-19
Recovery of sulphur from roaster gases
US635911A
(en )
1899-10-31
Process of improving quality and increasing quantity of illuminating coal-gas.
US66785A
(en )
1867-07-16
boynton
BE368260A
(instruction )
US1315811A
(en )
1919-09-09
Canada
BE382429A
(instruction )
US1364838A
(en )
1921-01-04
District
US1079788A
(en )
1913-11-25
Ore-reducing process.
BE355190A
(instruction )
US721617A
(en )
1903-02-24
Method of purifying blast-furnace gases.
BE433499A
(instruction )
GB443008A
(en )
1936-02-19
Improvements in methods of producing sulphur by the reduction of sulphur dioxide
PL50330B1
(instruction )
1965-10-15
BE444489A
(instruction )
BE495733A
(instruction )