What is the purpose of pre-washing in low-temperature methanol washing?

2016-05-11View Original

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What is the purpose of pre-washing in low-temperature methanol washing?

Reply #22016-05-11

1. Reduce the moisture content of methanol to prevent equipment corrosion

Reply #32016-05-11

1. Reduce the methanol-water content to prevent corrosion of equipment and pipelines. 2. Remove NH3/HCN

Reply #42016-05-11

Does the pre-washing mentioned by the poster refer to ammonia washing? Ammonia in the raw gas is removed, as its presence in the system can lead to the formation of crystals that block the pipes.

Reply #52016-05-11

1. Set up a pre-washing section to remove impurities such as NH3 and HCN from the feed gas. 2. Pre-washing and regeneration (extraction and distillation): Removal of naphtha and other substances carried in the feed gas, thereby regenerating methanol and recovering it, to obtain naphtha product.

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