Powdery s,s-ethylenediamine-n,n′-disuccinic acid iron complex and process for producing the same
AssigneeMitsubishi Rayon Co., Ltd.
InventorsShigeho Tanaka, Hiroyasu Banba, Kiyonobu Niwa
Life of this patent
Estimating the term…
Abstract
There is provided a powdery S,S-EDDS iron complex improved in its caking property. An S,S-ethylenediamine-N,N′-disuccinic acid iron complex, which is crystalline and has an average particle diameter of from 10 to 1000 μm and a water content of not more than 7% by weight, a powdery S,S-ethylene-N,N′-disuccinic acid (S,S-EDDS) iron complex having a compressive strength of not more than 1 kg/cm2, the compressive strength being measured according to JIS A 1108 after a lapse of 2 months under conditions of a temperature of 50° C. and a load of 300 g/cm2, and a process for producing the same.
Claims19
A powdery S,S-ethylenediamine-N,N′-disuccinic acid iron complex, which is crystalline and has an average particle diameter ranging from 10 to 1000 μm and a water content of not more than 5% by weight.
A powdery S,S-ethylenediamine-N,N′-disuccinic acid iron complex, which has a compressive strength of not more than 1 kg/cm2, the compressive strength being measured according to JIS A 1108 after a lapse of 2 months under conditions of a temperature of 50° C. and a load of 300 g/cm2.
The photographic treatment agent claimed in claim 12, wherein said photographic treatment agent is a photographic bleaching agent.
Dependencies are inferred from the claim text.