Inventor

NAKAI OSAMU

JP33 patents

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

NAKAI OSAMU

SUMITOMO METAL MINING CO

Separation method for zinc sulfide

Operation method for dezincification plant

Method for adding starting material slurry and sulfuric acid to autoclave in high pressure acid leaching process and autoclave

Autoclave apparatus used during high-pressure acid leaching process

Ore slurry production method and metal refining method

Hydrometallurgical process for a nickel oxide ore

Method for producing nickel sulfide and hydrometallurgical method for nickel oxide ore

Processing device and processing method for hydrogen-sulphide-containing barren solution

Method for effluent treatment in smelting of nickel oxide ore

Ore slurry pre-treatment method and ore slurry manufacturing method

Chromium-containing water treatment method

Dezincification plant, method for operating dezincification plant, and hydrometallurgical method for nickel oxide ore

Neutralization method and neutralization plant

Plant for manufacturing hydrogen sulfide gas and method for exhausting hydrogen sulfide gas

Hydrogen sulfide gas production plant and method for recovering and using waste hydrogen sulfide gas

Hydrogen sulfide gas production plant system and method for recovering and using hydrogen sulfide gas

Method for operating flash vessel

Method for shortening operation shutdown time of high pressure acid leach equipment in a hydrometallurgical process

Flash vessel and method for operating same

Sulfuric acid adding facility and operation method therefor

Slurry-transporting facility and slurry transportation control method

KUBOTA LTD

Butterfly valve

Rotary valve

Method of mounting valve seats in a butterfly valve

MITSUI HIROYUKI

Liquid storage apparatus and method of controlling the pressure in the same

Method of producing ore slurry

Method for recovering chromite, and method for wet smelting of nickel oxide ore

TOYO TIRE & RUBBER CO

Bolt press fit apparatus

System for drawing outer cylinder of rubber bush

KOBAYASHI HIROSHI

Method for producing raw material for ferronickel smelting from low grade nickel oxide ore

Method for a treatment for wastewater containing aluminum, magnesium, and manganese

MATSUBARA SATOSHI

Nickel recovery loss reduction method, hydrometallurgical method for nickel oxidized ore, and sulfuration treatment system

NAKAI OSAMU

Hydrometallurgical plant of nickel laterite ore and operation method thereof