substance

Isobutene (2-methylpropene)

Formula: C4H8
CAS: 115-11-7
InChIKey: VQTUBCCKSQIDNK-UHFFFAOYSA-N
ChEBI: CHEBI:43907

Show in the process graph →

Made by

Isobutene by MTBE cracking (50 kt/a, gas-phase cleavage)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

2C₄H₈givesC₈H₁₆Reactant · one process
C₅H₁₂Oin equilibrium withC₄H₈+CH₄OProduct · one process

Routes compared

One route in the Atlas makes Isobutene (2-methylpropene): nothing to compare yet. A comparison appears when a second route is added.

Per 1 kg of Isobutene (2-methylpropene): 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
Isobutene by MTBE cracking (50 kt/a, gas-phase cleavage)gas-phase MTBE cracking over an acidic silica-alumina type catalyst, heated multitubular reactor 553 K / 0.9 MPa, conversion 0.90 per pass with MTBE recycle, water wash, drying/DME column, methanol recovery; 50 kt/a isobutene, concept design	flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2026	Electric power: 0.00733 kWh Fired heat from natural gas (superheater and reactor heating): 0.351 kWh MP steam 1500 kPa(a): 0.322 kWh LP steam 450 kPa(a): 0.36 kWh	Fresh MTBE (boundary feed from an MTBE unit or terminal): 1.59 kg Demineralised make-up water (wash-water loop): 0.0071 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.