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Chemical Compatibility

Metering/Dispensing System — Caustics/Bases

Strong evidence

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Named chemicals

Sodium Hydroxide

What LibertyCES's vendor documentation shows

Cyanide destruction batch process explicitly doses NaOH via precision dosing pump/system to reach pH 11.5 setpoint.

Materials documented for this service

  • PVC/PP dosing skid

Products cited for this service

GF Signet precision dosing systems (cyanide destruction NaOH+chlorine)

Real Specifications

Cyanide destruction Stage 1 pH setpointpH 11.5, held via small NaOH adjustmentsgf-signet-application-solutions.md
Stage 1 ORP oxidation targetORP raised to +450mV via chlorine additiongf-signet-application-solutions.md
Two-Step process oxidation targetOxidation to below 0.1 ppm (cyanide → cyanate)gf-signet-application-solutions.md
Two-Step Stage 2 detention timeUp to 4-hour detention time in modern systems, pH lowered with sulfuric acidgf-signet-application-solutions.md
Post-neutralization bath monitoring target9.5 pH, 450 mV oxidation level maintainedgf-signet-application-solutions.md
Install / Failure Note

GF Signet's own process documentation warns that acid injection must be manually locked out during Stage 1 of batch cyanide destruction — letting pH drop below 11 risks releasing toxic cyanogen chloride gas and stops the cyanide-to-cyanate oxidation from completing properly.

A NaOH dosing skid quoted for cyanide destruction isn't just about hitting a pH number — GF Signet ties the pH 11.5 setpoint directly to a gas-release safety threshold, which means the acid-injection interlock logic matters as much as the pump's turndown ratio.

Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.

FAQ

Is Metering/Dispensing System compatible with Caustics/Bases?

Cyanide destruction batch process explicitly doses NaOH via precision dosing pump/system to reach pH 11.5 setpoint. This is strong evidence.

What materials are documented for Metering/Dispensing System in Caustics/Bases service?

Materials documented for this service: PVC/PP dosing skid. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm with a spec review before final specification.

What specific Caustics/Bases chemicals does this cover?

Named chemicals in this documentation: Sodium Hydroxide.

What products are cited for Metering/Dispensing System in Caustics/Bases service?

Documented examples include GF Signet precision dosing systems (cyanide destruction NaOH+chlorine).

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