| abstract |
PCT No. PCT/JP90/01609 Sec. 371 Date Aug. 6, 1991 Sec. 102(e) Date Aug. 6, 1991 PCT Filed Dec. 11, 1990 PCT Pub. No. WO91/09154 PCT Pub. Date Jun. 27, 1991.An oxygen scavenger for a boiler water system comprising a starch derivative in which 0.01 to 5% by weight of sulfur- or nitrogen-containing groups, as S or N, are introduced to a starch with DE (dextrose equivalent) of 1% or higher, as well as a method of scavenging dissolved oxygen in a boiler water system by adding the oxygen scavenger for a boiler water system to a boiler water system. |