substance

Potassium tert-butoxide

Formula: C4H9KO
CAS: 865-47-4
InChIKey: LPNYRYFBWFDTMA-UHFFFAOYSA-N

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Made by

Potassium tert-butoxide from potassium and dry tert-butanol, semi-batch with alcohol strip and vacuum drying (1000 t/a)Main productConcept · not reviewed

Used by

Di-tert-butyl dicarbonate by semi-batch carbonation and phosgenation of potassium tert-butoxide (500 t/a)FeedstockConcept · not reviewed

Takes part in

2K+2C₄H₁₀Ogives2C₄H₉KO+H₂Product · Potassium with tert-butanol to potassium tert-butoxide and hydrogen · one process
C₄H₉KO+CO₂givesKTBCReactant · Carbonation of potassium tert-butoxide · one process

Routes compared

One route in the Atlas makes Potassium tert-butoxide: nothing to compare yet. A comparison appears when a second route is added.

Per 1 kg of Potassium tert-butoxide: inventory from each route's LCI dataset, unallocated; footprints per the functional unit of their own LCA.

Route	Tier, design maturity, review status	Geography, year	Energy	Feedstocks	Key emissions	Footprint	Comparability
Potassium tert-butoxide from potassium and dry tert-butanol, semi-batch with alcohol strip and vacuum drying (1000 t/a)Batch plant: molten potassium dosed over 3 h into 8.6 mol of dry tert-butanol per mol at 348 K (semi-batch), the hydrogen vented as it forms through a vent condenser at 308 K to the flare; the alkoxide solution stripped at atmospheric pressure in a batch still down to the 1:1 solvate and the paste vacuum-dried at 433 K in a paddle dryer on MP steam; the alcohol recycled (0.5 % purged); the make-up, tert-butanol of the azeotrope grade, dried on a vapour-phase 3A molecular sieve; 831.6 kg per batch, 1202 batches a year on a dedicated train	flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2026	Electric power: 0.325 kWh LP steam 350 kPa(a) (R-101 heat-up, the still, the potassium melter, the sieve's evaporator, tank heating): 1.19 kWh MP steam 1000 kPa(a) (the dryer DR-101): 0.357 kWh	Potassium metal (merchant): 0.348 kg tert-Butanol, azeotrope grade, the alcohol contained (tert-butanol-1): 0.734 kg Water of the azeotrope grade (with the tert-butanol of tert-butanol-1): 0.0979 kg Nitrogen for inerting R-101, blanketing C-101 and the tanks, pressing the potassium, the dryer's bleed and vacuum breaks and the vent header's purge: 0.115 kg	none	no footprint	–

ISO 14044 requires a critical review (by a panel of interested parties, ISO/TS 14071) of a comparative assertion intended to be disclosed to the public. These routes are listed side by side for screening; a statement that one is better than another needs that review. None of these routes has had such a review.