公开(公告)号：US20220402029A1

公开(公告)日：2022-12-22

申请号：US17777196

申请日：2020-11-10

Applicant: NISSHIN ENGINEERING INC.

Inventor： Shu WATANABE ,  Shiori SUEYASU ,  Keitaro NAKAMURA

IPC: B22F9/08 ,  C09C3/08 ,  C09C1/62 ,  B22F1/14

Abstract: Provided is a fine particle production apparatus and a fine particle production method capable of easily obtaining surface treated fine particles. The fine particle production apparatus produces fine particles using feedstock by means of a gas-phase process. The apparatus includes a treatment section configured to transform the feedstock into a mixture in a gas phase state by means of the gas-phase process, a feedstock supply section configured to supply the feedstock to the treatment section, a cooling section configured to cool the mixture in a gas phase state in the treatment section using a quenching gas containing an inert gas, and a supply section configured to supply a surface treating agent to fine particle bodies in a temperature region in which the surface treating agent is not denatured, the fine particle bodies being produced by cooling the mixture in the gas phase state with the quenching gas.

公开(公告)号：US20220402025A1

公开(公告)日：2022-12-22

申请号：US17777459

申请日：2020-09-29

Applicant: NISSHIN ENGINEERING INC.

Inventor： Shu WATANABE ,  Shiori SUEYASU ,  Keitaro NAKAMURA

IPC: B22F1/102 ,  B82Y30/00 ,  B82Y40/00 ,  B22F1/054 ,  B22F9/02

Abstract: Fine particles that can be sintered and grow to 100 nm or larger without oxidation even when retained at a baking temperature in an oxygen-containing atmosphere and that can suppress oxidation in a long-term preservation in the air or other oxygen-containing atmospheres, a method of producing the fine particles, and a method of producing fine particles that can suppress oxidation in a collecting process after the production of the fine particles. A fine particle production method for producing fine particles using feedstock powder by means of a gas-phase process includes a step of producing fine particle bodies by converting the feedstock powder into a mixture in a gas phase state using a gas-phase process and cooling the mixture in a gas phase state with a quenching gas containing an inert gas and a hydrocarbon gas having 4 or less carbon atoms, and a step of supplying an organic acid to the produced fine particle bodies.