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The story of chestnut extract

items 17 of 38 items
  • wcu_canton-2013.jpg
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  • The Extracting Processes Employed IN PRODUCING CHAMPION EXTRACTS IN the Champion mills the use of large capacity multiple equipment for the extracting processes is an important part of the manufacturing development. In the following pages, from eighteen to twenty-two, are shown reproductions of photographs of the various operations involved in extracting tannin from chestnut wood, in the Champion extract plant. The thirty-six gigantic steam-tight vessels, called autoclaves, operate in a series of six to each group. The extracting of tannin is done by hot water leaching similar to counter current washing. Approximately every forty minutes one autoclave in each series of six is ready to empty its contents of fully rinsed, tannin-free chips of chestnut and to be loaded again with fresh chestnut chips. These chips are cut to a very small size to facilitate the removal of tannin. Chestnut is a coarse grained wood of intermediate hardness. Its fibre structure is somewhat porous and in the pores or ducts separating the fibre the tannin is found. By thorough diffusion of water between the small size chips, efficient extraction of tannin is carried on with a high yield. Concentrated extract is drawn from one autoclave to another through all six in the group and finally is carried out of the last of the six. Each autoclave is rinsed in turn to bring out the full tannin content. The extract liquor is forced from one autoclave to another by air until the full concentrated extract is ready to be pumped out into storage tanks. In this operation a veritable labyrinth of controls and gauges shows the autoclave crew the progress of the leaching. After the extract has been removed from the chips they are dumped from the extractor at the finish of the operation and carried on a conveyor to a pulp mill department in the Champion mills, preparatory to making soft, clean, white wood pulp for paper manufacture. In this combination of the use of a raw material, suitable for two distinctly different industries, paper-making and tanning, is found a basic cycle of operation that is unique. This offers to the Champion mills the opportunity to continue progressive development in the improvement of the quality of their extracts, and to provide accurate technical control and supervision of chemical tests that are possible only because of this combination, which affords large organization facilities. 17
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Object’s are ‘parent’ level descriptions to ‘children’ items, (e.g. a book with pages).