Make useful polyols from UK waste carbon

A compact output record—not a disclosure of prompts, private sources, or proprietary method mechanics.

Meaningful baseline

The initial investigation already covered waste-PET routes, controlled-family polyurethane recovery, waste-oil conversion, selective finishing, downstream response, and economic boundaries.

Actual incremental contribution

The completed investigation developed closer photopolymer-related evidence, stronger measurement controls, and more explicit decisions about where purification or isolation might matter.

Reported lineage

A3 / B-02a kept whole-oil conversion and selected-family separation available as conditional routes. S-06 then restricted fractionation to cases where whole-oil endpoint control could not repair variability.

Specific disputed proposition

S-06 treated successful whole-oil endpoint control as sufficient reason to exclude a broader fractionation comparison.

Exact Challenge effect

C1-R3 supplied the economic counterexample: whole-oil conversion could work technically yet cost more to correct downstream. C2-OIL preferred the narrower trigger but did not eliminate that counterexample. Final restored the broader comparison without treating either review as a vote or claiming a profitable route.

Retained Residue

A rejected universal cleanup claim still leaves stream-specific membrane tests, earlier separation options, lot genealogy, and diagnostic use after preventive diversion is no longer possible.

Reconsideration conditions

The local decision requires whole-feed composition, accepted function, recovery, reagent use, product loss, downstream response, and total processing economics for the actual feed.

Proposed next discriminator · untested

For one characterized feed, compare whole-oil endpoint control with selected-family separation while measuring yield, wanted-material loss, downstream cure behavior, reagent and recovery burden, and total processing cost.