substance
Calcium carbonate
Precipitated calcium carbonate (e.g. the lime of the nitrophosphate CNTH conversion). Limestone rock is the mixture limestone.
- Formula
- CCaO3
- CAS
- 471-34-1
- InChIKey
- VTYYLEPIZMXCLO-UHFFFAOYSA-L
- ChEBI
- CHEBI:3311
Made by
- NPK 15-15-15 by the nitrophosphate (ODDA) route, with CNTH conversion to ammonium nitrate and limeCo-productConcept · not reviewed
Used by
When a process with this chemical is added to the library, it appears here.
Takes part in
- CCaO3givesCaO+CO2Reactant · Lime mud calcination (biogenic carbonate carbon) · 2 processes
- Na2CO3+CaH2O2givesCCaO3+2NaOHProduct · Causticizing · one process
- CaSO4+Na2CO3givesCCaO3+Na2SO4Product · Calcium removal with soda ash · one process
Routes compared
One route in the Atlas makes Calcium carbonate: nothing to compare yet. A comparison appears when a second route is added.
Per 1 kg of Calcium carbonate: 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 |
|---|---|---|---|---|---|---|---|
| NPK 15-15-15 by the nitrophosphate (ODDA) route, with CNTH conversion to ammonium nitrate and limenitrophosphate (ODDA) process: digestion in about 60 % HNO3, cooling crystallisation of calcium nitrate tetrahydrate, ammoniation of the nitrophosphoric acid, spherodiser or drum granulation; the mixed-acid route and CN fertiliser instead of conversion are not modelled | Tier 0 (stoichiometric)Design maturity: Concept (research)Not independently reviewedDataset review: unreviewed | RER, 2002 | a co-product of a multi-output dataset (product:npk, product:ammonium-nitrate besides it): its share needs the allocation of the LCI database build | 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.