substance

Di-tert-butyl dicarbonate

Formula: C10H18O5
CAS: 24424-99-5
InChIKey: DYHSDKLCOJIUFX-UHFFFAOYSA-N

Show in the process graph →

Made by

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

Used by

No process in the Atlas uses this yet.

When a process with this chemical is added to the library, it appears here.

Takes part in

2KTBC+COCl₂givesC₁₀H₁₈O₅+CO₂+2ClKProduct · Phosgenation of potassium tert-butyl carbonate to di-tert-butyl dicarbonate (amine-catalysed, net) · one process

Routes compared

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

Per 1 kg of Di-tert-butyl dicarbonate: 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
Di-tert-butyl dicarbonate by semi-batch carbonation and phosgenation of potassium tert-butoxide (500 t/a)Batch plant: potassium tert-butoxide suspended in recovered hexane with DABCO at 278 K, CO2 dosed (2 h) then phosgene gas (4 h) in one glass-lined semi-batch, CO2 and isobutene vented as they form, the slurry degassed; the hexane stripped at 15 and 1 kPa(a) and recycled; the Boc2O melt washed with warm water; vacuum distillation at 0.13 kPa(a) from a liquid-paraffin heel; the vents to a caustic scrubber and a thermal oxidiser; 655.71 kg per batch, 762.5 batches a year on a dedicated train	flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2026	Electric power: 0.424 kWh LP steam 350 kPa(a) (the tempered and hot-water circuits): 1.21 kWh	Potassium tert-butoxide (merchant solid): 1.15 kg n-Hexane make-up (merchant): 0.113 kg DABCO catalyst (merchant): 0.0138 kg Carbon dioxide gas (merchant): 0.587 kg Liquid phosgene (phosgene-1): 0.497 kg Liquid paraffin make-up (merchant white oil): 0.0303 kg Process water (wash, scrubber make-up): 4.18 kg Caustic soda 50 wt% (chlor-alkali-1): 0.164 kg Nitrogen for inerting R-101, sweeping the degassing, purging the phosgene line, breaking the vacuums and blanketing the tanks: 0.24 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.