| 摘要 |
<p>The present invention relates to a composition comprising primarily stannous chloride, the composition being free flowing in the solid-state and being a particulate form of stannous chloride in which particles comprising a stannous chloride core are coated with a layer comprising stannous oxide and optionally stannous hydroxy chloride, stannic oxide, metastannic acid and metastannate of stannous oxide or mixtures thereof. The composition was found to remain free flowing over a period of six months in contrast to untreated stannous chloride otherwise treated identically, which caked and did not flow freely after one month. The composition may be produced by providing stannous chloride in particulate form, heating it to between 100 and 200 degrees C, and exposing it to a limited amount of atmospheric air over a period of 1 to 6 hours, to an extent such that the stannous chloride is reacted to form the coating species to the extent of forming less than 2% by weight of the particles.</p> |
