TUBULAR IRON OXIDE PARTICLES, METHOD FOR PRODUCING SAME, AND ANTIBACTERIAL RED PIGMENT

WIPO Patent Application WO/2021/210212

A1

Provided are: a method for producing tubular iron oxide particles that yields tubular structures in satisfactory proportions while being a simple and convenient process; and the tubular iron particles yielded thereby. Also provided, inter alia, is an antibacterial red pigment that exhibits excellent color and has a high antibacterial performance.　The method for producing tubular iron oxide particles comprises an organic sheath production step for culturing iron-oxidizing bacteria in a culture solution within a vessel of a culture device, to produce an organic sheath on the outer periphery of the bacteria; an iron-containing organic sheath production step for adding at least a trivalent iron compound to the culture solution in which the organic sheath has been produced, and inducing deposition of an iron component, thereby producing an iron-containing organic sheath that contains the iron component; a step for adjusting the pH of the culture solution to 3-4 by adding a pH modifier; a separation step for separating the iron-containing organic sheath from the culture solution; and a heat-treatment step for subjecting the iron-containing organic sheath to a heat treatment to produce at least iron oxide.

TAMURA KATSUNORI (JP)
FUJII TATSUO (JP)
TAKADA JUN (JP)

PCT/JP2020/043974

October 21, 2021

November 26, 2020

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NAT UNIV CORPORATION OKAYAMA UNIV (JP)

C12P1/04; B01J23/88; B01J35/02; C01G49/06; C12N1/00

WO2019123670A1	2019-06-27
WO2011074586A1	2011-06-23

JPH10338526A	1998-12-22
JP2018070441A	2018-05-10
JP2009072702A	2009-04-09

UNIUS PATENT ATTORNEYS OFFICE (JP)

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