Iodine flakes (99.8 wt% I2) to packing

Activity Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a), GLO: the inventory of 1 kilogram of its reference product, attributional, cut-off.

Calculation maturity: not assessed Design maturity: Concept (research)Not independently reviewediodine-1:iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a:product:IODINEPreliminaryReport a problem with this dataset
Research outputAn inventory from a research design at the design maturity its process states, not verified plant data: check its calculation maturity and review status before use. Background activities are referenced by name only; no background data is included. All caveats

What it is

Unallocated foreground LCI of Iodine from natural brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a), case design, derived from the flowsheet by cheme assess lca.

Reference product
1 kilogram of Iodine flakes (99.8 wt% I2) to packing (1.01325 bar(a), 40 degC, 99.8 % I2 (mass))
Chemical
iodine
CAS
7553-56-2
Code
iodine-1:iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a:product:IODINE
Dataset
iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a version 0.1.0 · UUID eceed654-1910-56de-980c-49c22d79cc8c
Activity UUID
not available (the library assigns none; use the code)
Database
cheme-as-code-atlas-preview-c3ab348 (version preview-c3ab348)
Process
Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)
Geography
GLO · background inputs with a site rule link at the user's site location (default DE)
Time period
2026 · valid until 2031
Technology
iodine from natural iodide brine: acidification with recycled liquors, chlorine oxidation, air blowing-out in a closed air loop, absorption in HI/H2SO4 with SO2, chlorine precipitation, filtration, melting under sulfuric acid, flaking; spent brine neutralised with caustic and reinjected; 1000 t/a · level current
Boundary
gate-to-gate foreground of the plant
Production volume
1,000,000 kg/a (product:IODINE per hour x operation.hours_per_year (8000 h/a))
Classification
ISIC Rev.4 2011 (taxonomy/families.yaml (ISIC Rev.4) of the process's families)
System model
attributional, cut-off (docs/system-model.md, methodology 1.1.0)
Allocation
mass, 100 % of the dataset to this product (rule single-output, from default)
one product: nothing to allocate
Rights
CC-BY-4.0: the ChemE-as-Code process library's own concept design (LICENSE-DATA)

Exchanges per 1 kilogram of Iodine flakes (99.8 wt% I2) to packing

As exported: allocated and scaled to the reference product. Provenance: 9 assumed, 3 calculated. Pedigree scores (1 best, 5 worst): reliability, completeness, temporal correlation, geographical correlation, further technological correlation.

Preliminary2 exchanges are not yet linked to a background dataset. They count no burden, so the inventory is incomplete: do not read a result from it as complete.
InputAmountUnitProvenancePedigreeLinked to
Raw iodide brine from the wellfield (degassed, de-oiled)
feed:BRINE
Raw iodide brine (S1, 462 t/h, 300 mg/kg iodine as iodide, about 10 wt% NaCl) at the plant battery limit: connect to the operation of a deep brine wellfield (production wells of 2000-4000 m with their lifting power, wellhead degassing and de-oiling, gathering lines), per t of brine delivered, with the iodide, salt and water withdrawn from the formation as resources of that activity. No such open dataset is known; a library utility or brine-field process is the likely home.
From stream S1
3,695kilogramassumed4 4 1 3 3unlinked
unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Chlorine gas 400 kPa(a) (chlor-alkali-1 product CL2)
feed:CL2
Dry chlorine gas at 400 kPa(a) (S2 + S14): connect to the library process chlor-alkali-1 (membrane cells, product CL2 of the same state) once its dataset is published in the Atlas, or else to a market for chlorine, gaseous, from membrane-cell chlor-alkali electrolysis (with its co-product allocation).
From streams S2, S14
0.6144kilogramassumed4 4 1 3 3Atlas (pinned): Chlor-alkali by membrane-cell electrolysis (100 kt/a Cl2, 50 wt-% caustic soda, hydrogen) (Dry chlorine gas to the consumer (400 kPa(a)), GLO)
compatible: grade the input names no chemical only; chlorine (Dry chlorine gas to the consumer (400 kPa(a))) is taken; unit kilogram; system model cutoff (one database); allocation shares (deviation); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Liquid sulfur dioxide (vaporised at the absorber)
feed:SO2
Liquid sulfur dioxide (S11): connect to sulfur dioxide, liquid, production by burning elemental sulfur with air and liquefying the gas (or recovery from a smelter off-gas), at plant. The chemicals registry has no sulfur dioxide slug yet; the sulfur furnace of sulfuric-acid-1 is the nearest library process.
From stream S11
0.2809kilogramassumed4 4 1 3 3unlinked
unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Sulfuric acid 98.5 wt% (sulfuric-acid-1 product ACID)
feed:H2SO4
Sulfuric acid 98.5 wt% (S18) for the iodine melter: connect to the library process sulfuric-acid-1 (sulfur burning, double contact, product ACID 98.5 wt%) once its dataset is published, or else to a market for sulfuric acid.
From stream S18
0.2026kilogramassumed4 4 1 3 3Atlas (pinned): Sulfuric acid from sulfur burning, double contact / double absorption (1000 t/d, 98.5 wt%) (Sulfuric acid 98.5 wt% to storage, GLO)
compatible: grade the input names no chemical only; sulfuric-acid (Sulfuric acid 98.5 wt% to storage) is taken; unit kilogram; system model cutoff (one database); allocation shares (deviation); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Caustic soda 50 wt% (chlor-alkali-1 product NAOH)
feed:NAOH
Caustic soda 50 wt% (S22) for the spent brine neutralisation: connect to the library process chlor-alkali-1 (product NAOH 50 wt%), or else to a market for sodium hydroxide, without water, in 50 % solution state.
From stream S22
1.137kilogramassumed4 4 1 3 3Atlas (pinned): Chlor-alkali by membrane-cell electrolysis (100 kt/a Cl2, 50 wt-% caustic soda, hydrogen) (Sodium hydroxide, Caustic soda 50 wt-% to storage, GLO)
compatible: grade the input names no chemical only; sodium-hydroxide (Sodium hydroxide, Caustic soda 50 wt-% to storage) is taken; unit kilogram; system model cutoff (one database); allocation shares (deviation); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Process water (absorber make-up)
feed:PW
Process water (S12, absorber make-up): connect to a market for water, deionised or decarbonised, per kg (the HI liquor tolerates softened water; quality open).
From stream S12
8.896kilogramassumed4 4 1 3 3market for water, deionised (water, deionised, RoW) in your background (default ecoinvent-3.11-cutoff)
Electric power
feed:POWER
Electricity for the circulation fan K-201, the reinjection pump P-401, the absorbent pump P-202 and the recovery drives (Q1-Q4): connect to a market for electricity, medium voltage, of the site's country.
electricity
From streams Q1, Q2, Q3, Q4
4.793kilowatt hourassumed4 4 1 3 3market for electricity, medium voltage (electricity, medium voltage, DE, site location) in your background (default ecoinvent-3.11-cutoff)
LP steam 450 kPa(a) to the iodine melter (condensate returned)
feed:LPS
LP steam 450 kPa(a) to the iodine melter (Q5, heat delivered): connect to heat from steam in the chemical industry, or to the library process utility-steam-ng-boiler (natural gas boiler) per kWh of steam heat.
steam, LP, 147.65 degC, 4.5 bar(a)
From stream Q5
0.06504kilowatt hourassumed4 4 1 3 3Atlas: heat from steam, per kWh (Atlas unit proxy) (heat from steam, by energy, GLO)
Neutralised spent brine to reinjection into the producing formation
product:SPENT
Neutralised spent brine (S24, 463 t/h at 3100 kPa(a): about 10 wt% NaCl, 0.025 wt% Na2SO4, about 30 mg/kg iodine as I2/iodide): returned to the formation it came from (Oklahoma Geological Survey). Connect to the operation of brine injection wells (the injection pump is in the foreground, P-401); the salts and residual iodine go back underground, not to surface water. If a site discharges instead, its salts become emissions to water and need their own exchanges.
From stream S24
3,704kilogramcalculated3 4 1 3 3Atlas (plant): wastewater to treatment, per kg (Atlas unit proxy) (wastewater, by mass, GLO)
compatible: grade the input names wastewater only; wastewater (Wastewater treated) is taken; unit kilogram; system model cutoff (one database); allocation mass (single-output); boundary plant gate of a site utility: no utility market yet (docs/markets.md)
Cooling water return
product:CW
Heat rejected to the site cooling water system by the flaker X-301 (Q6, 298/308 K): connect to cooling water supply / heat rejection in an evaporative cooling tower, or the library process utility-cooling-tower, per kWh of heat removed.
cold, 25 degC
From stream Q6
0.02248kilowatt hourassumed4 4 1 3 3Atlas (plant): cooling water service, per kWh heat rejected (Atlas screening proxy) (heat rejected to cooling water, GLO)
compatible: grade the input names cooling-water only; cooling-water (Heat rejected to cooling water, 25/35 degC) is taken; unit kilowatt hour; carrier cold, 25 degC from cold, 25 degC; system model cutoff (one database); allocation mass (single-output); boundary plant gate of a site utility: no utility market yet (docs/markets.md)

Elementary flows

FlowDirectionCompartmentAmountUnitProvenancePedigree
Carbon dioxide, fossil
349b29d1-3e58-4c66-98b9-9d1a076efd2e
From stream S7
emissionair0.3253kilogramcalculated3 4 1 3 3
Iodine
446d8fe4-fde6-4640-bc23-f04a663bbc04
From stream S7
emissionair2.546e-4kilogramcalculated3 4 1 3 3

The streams are the plant's own flows: an amount here is allocated and per 1 kilogram of Iodine flakes (99.8 wt% I2) to packing, so it differs from the stream's flow, and it can sum several streams.

Where these numbers come from: each exchange names its source above; the dataset is processes/iodine-1/lca/dataset.yaml in library version c3ab348.

Used by

No other activity of this database links to it.

How good it is

Review
Not reviewed: no LCI review record yet
Data quality
DQR 2.33 · PEF-style DQR 2.5
TeR 3 · GeR 3 · TiR 1 · P 3 · C 4 · weakest TeR · primary data 0 %
Mass and carbon closure
Assessed (lca/manifest.json balance, tolerance 5 %: design maturity concept (sourced screening))
  • lci-carbon-origin: closed
  • lci-element-balance: closed
  • lci-mass-balance: closed
Change report
Not available: this build has no change report against an earlier release.

KPI benchmark positions

Not available: no benchmarked KPI for this dataset.

How to use it

Downloads

A file with this activity alone is not available: each file above is the whole database, and the line under it says how to find this activity there.

import bw2data as bd
from cheme_as_code_lci import install

bd.projects.set_current("my-project")   # holds your licensed background + biosphere3
install("cheme-as-code-atlas-preview-c3ab348.xlsx", background="ecoinvent-3.11-cutoff", location="DE")
activity = bd.get_activity(("cheme-as-code-atlas-preview-c3ab348", "iodine-1:iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a:product:IODINE"))

While any exchange of the database has no mapping, install() writes nothing and only lists the unlinked exchanges. So the last line finds no activity until the gaps are mapped: the download section gives the ways to use the database now.

How to cite

Iodine flakes (99.8 wt% I2) to packing, from Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a) (dataset iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a 0.1.0), ChemE-as-Code Process Atlas LCI database preview-c3ab348, activity iodine-1:iodine-from-natural-brine-by-chlorine-oxidation-air-blowing-out-and-so2-absorption-1000-t-a:product:IODINE. Cite the Process Atlas paper (in preparation, 2026), by Artur M. Schweidtmann and Jana M. Weber, and the ChemE-as-Code Process Atlas LCI database version preview-c3ab348.

DOI: none yet (the Process Atlas paper is in preparation)

For the data, cite the Process Atlas paper; for the platform that builds and checks it, the ChemE-as-Code paper.

Schweidtmann, A. M. & Weber, J. M. (2026, in preparation). Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title).

BibTeX
@unpublished{schweidtmann_process_atlas,
  author = {Schweidtmann, Artur M. and Weber, Jana M.},
  title = {{Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title)}},
  year = {2026},
  url = {https://atlas.cheme-as-code.org},
  note = {in preparation}
}

Schweidtmann, A. M. (2026, in preparation). ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title).

BibTeX
@unpublished{schweidtmann_cheme_as_code,
  author = {Schweidtmann, Artur M.},
  title = {{ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title)}},
  year = {2026},
  url = {https://cheme-as-code.org},
  note = {in preparation}
}