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During polypropylene production, the feedstock propylene contains trace impurities such as S, SO₂, CO, H₂O, and As. These impurities readily reduce catalyst activity and may even cause catalyst poisoning and deactivation, disrupting normal production. Particularly with the development and application of high-efficiency catalysts in the polypropylene industry, stricter requirements have been imposed on the arsenic content in propylene feedstock. Levels below 30 ppb are necessary to prevent catalyst poisoning. Therefore, arsenic removal agents are required to eliminate arsenic impurities from the propylene feedstock to protect the polymerization catalyst. RAs998, a novel copper-based arsenic removal agent, is primarily used to remove trace arsenic from liquid-phase propylene in polypropylene production. It can also be applied to other olefin feedstocks, offering excellent arsenic removal efficiency, high capacity, and ease of use. Its overall performance matches that of imported German catalysts. Arsenic Removal Principle of RAs998: Arsenic trihydride (AsH₃) in liquid propylene reacts with copper oxide to form copper arsenide, elemental arsenic, and new copper-arsenic alloys, thereby achieving the removal of AsH₃ from the feedstock.

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