spent acid

The lime neutralization process raises the pH of the spent acid.

Spent acid goes to storage and periodically removed.

By recuperation of the spent acid, a closed acid loop is established.

Approx 10-12 tonnes of spent acid per week was taken by a licensed liquid wastes contractor.

Waste elemental mercury, spent acids and bases may be collected separately for recycling.

Access to a suitable plant is required for the supply of fresh acid and the disposition of spent acid.

These plants combust spent acid with natural gas, refinery gas, fuel oil or other fuel sources.

Such solutions are designated "spent acid," especially when the hydrochloric acid is not completely consumed:

Used acid is often recycled using a spent acid regeneration (SAR) plant.

Alternatively it is possible to install a WSA Process unit to regenerate the spent acid.

Recoveries from these intervals included spent acid, gel, completion fluid, gas cut oil and small amounts of oil but no formation fluid.

Spent Acid - the residue from the sulphuric-acid treatment of petroleum lubricants; also known as sludge assay or waste acid.

Solid superacid catalysts alleviate the need to dispose of spent acids, thus providing a significant environmental advantage over dissolved acids.

It is possible to combine spent acid regeneration with disposal of hydrogen sulfide by using the hydrogen sulfide as a fuel.

Bleacher Batch Process: Spent Acid Recovery:

Description (8 digit) Continuous Process: Spent Acid Recovery:

Fe + 2 HCl FeCl + H The spent acid requires treatment before its disposal.

Atmospheric air is blown into the hot, spent acid, oxidizing ferrous ions to insoluble hydrated iron oxide FeO(OH) (goethite) which precipitates out of solution.

Acetone Distillation and Recovery Continuous Process: Spent Acid Recovery Continuous Process:

The WSA process can also be used for production of sulfuric acid from sulfur burning or for regeneration of the spent acid from e.g. alkylation plants.

The spent acid has long been reused as iron(II) chloride (also known as ferrous chloride) solutions, but high heavy-metal levels in the pickling liquor have decreased this practice.

Acid Recovery from Spent Acid and Electrolytes via Continuous Ion Exchange Dennis R.S. EPD Congr.

The spent acid is degassed in an acid blowdown drum, waste water pH is adjusted and acid vent streams are neutralized with caustic in a scrubber before being flared.

Potential uses include sulfuric acid plants, spent acid recovery plants, sulfide ore smelters, sulfur recovery units, flue gas desulfurization units, pulp mills, and SO2 production, storage, and transportation.

SAR plants are common additions to metal smelting plants, oil refineries, and other industries where sulfuric acid is consumed in bulk, as operating a SAR plant is much cheaper than the recurring costs of spent acid disposal and new acid purchases.