PROCESS FOR DRYING A NATURAL RUBBER
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United States of America Patent
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Oct 8, 2020
app pub date -
May 30, 2017
filing date -
May 31, 2016
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Abstract
A process for drying a natural rubber starting from a wet natural rubber coagulum is provided. In a first step, the wet natural rubber coagulum is compressed at a temperature ranging from 185° C. to 210° C., then in a second step subjected to a flash adiabatic expansion at a differential pressure of at least 100 bar. Optionally supplemented by convective drying or by repeating the first and second steps, the process leads to a dry natural rubber having a nitrogen content of at most 0.3%.
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