China Amines Co., Limited

An initial fill and a routine makeup order may both call for N-methyldiethanolamine (MDEA, CAS 105-59-9), but they start from different information. For an initial fill, purchasing works from the commissioning specification. For makeup, it works from the solvent already in the system and the quantity the plant needs to replenish.

Initial fill starts with the commissioning specification

Confirm the approved solvent grade, the total working solution required and the concentration specified by the process team. In the RFQ, state whether the supplier should quote concentrated MDEA for on-site preparation or a premixed solution. Give the quantity on an as-delivered basis and include the date the solvent must be available at the plant. If deliveries need to arrive in stages, list the required quantity and receiving window for each shipment.

Makeup starts with the solvent already in service

For a routine top-up, ask the operations team to confirm the approved makeup grade and required quantity. The circulating solvent concentration and the concentration of the delivered makeup product are separate figures. If the unit uses an activated formulation, include the approved grade reference so the supplier can identify the right product.

Flag a planned partial replacement in the RFQ

A planned partial replacement may require a larger quantity and a narrower delivery window than routine makeup. Give the supplier the total replacement quantity, requested delivery sequence and batch documentation requirements. Ask the process team to confirm the replacement specification against the existing solvent inventory before issuing the order.

Request an MDEA quotation

Tell China Amines Co., Limited whether the order is for an initial fill, routine makeup or partial replacement. Include the approved grade, as-delivered concentration and quantity, preferred packaging, destination port and required delivery date. Share any batch COA requirements so we can check the documentation alongside the quotation.

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