Inventor

DUYVESTEYN WILLEM P C

US60 patents

⚠️ This page may combine multiple inventors who share the name “DUYVESTEYN WILLEM P C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DUYVESTEYN WILLEM P C

BHP MINERALS INT INC

Heap leaching of nickel containing ore

Method for recovering nickel from high magnesium-containing Ni-Fe-Mg lateritic ore

Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands

Recovery of base materials from geothermal brines

Process for organic acid bioleaching of ore

Biochemical treatment of bitumen froth tailings

Recovery of metals from ore

Resin-in-pulp method for recovery of nickel and cobalt

Hydrometallurgical process for producing zinc oxide

Recovery of nickel from bioleach solution

Recovery platinum group metals from oxides ores

Boron recovery from geothermal brines

Lithium metatungstate

Hydrometallurgical processing of lead materials using fluotitanate

AMAX INC

Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materials

Two-stage leaching process for steel plant dusts

Process for metal recovery from steel plant dust

Zinc recovery from steel plant dusts and other zinciferous materials

Recycling of steel plant dusts to steel furnaces

Acid leaching of nickeliferous oxide ores with minimized scaling

Leaching nickeliferous oxide ores

Electrogalvanizing utilizing primary and secondary zinc sources

MARATHON OIL CANADA CORP

Oxidation of asphaltenes

Processing asphaltene-containing tailings

Method for obtaining bitumen from tar sands

System and method of separating bitumen from tar sands

Biodiesel production and use in oil sands processing

Separation of tailings that include asphaltenes

Nozzle reactor and method of use

SCANDIUM INT MINING CORPORATION

Systems and methodologies for direct acid leaching of scandium-bearing ores

Solvent extraction of scandium from leach solutions

Recovery of critical metals from SX-EW copper raffinate and other solutions derived from leaching ores with sulfuric acid

Process for the preparation of high purity alumina

Systems and processes for recovering scandium values from laterite ores

Extraction of scandium values from copper leach solutions

DUYVESTEYN WILLEM P C

Treatment of copper sulfide concentrates

Dry, stackable tailings and methods for producing the same

Oxidation of asphaltenes

Nozzle reactor and method of use

Dry, stackable tailings and methods for producing the same

SCANDIUM INT MINING CORP

Countercurrent process for recovering high purity copper sulfate values from low grade ores

Byproduct scandium recovery from low grade primary metal oxide ores

Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applications

Method for recovering scandium values from leach solutions

ALTAIR NANOMATERIALS INC

Processing aqueous titanium chloride solutions to ultrafine titanium dioxide

Processing aqueous titanium solutions to titanium dioxide pigment

Processing titaniferous ore to titanium dioxide pigment

UNIV UTAH RES FOUND

Fragmentation of heavy hydrocarbons using an ozone-containing fragmentation fluid

EXTRACTIVE METALLURGY CONSULTANCY LLC

Extraction of lithium from mudstone and sequestration of carbon dioxide

BHP UTAH INTERNATIONAL CORP

Lithium metatungstate