Patent · US Active

Method for processing liquefied waste polymers

US11952544B2 · kind B2 · utility

0Cited by

12References

17Claims

0Family size

Assignee

NESTE OYJ · FI

Inventors

Heikki Aaltonen · Nakkila, FI
Antti Ojala · Ludwigshafen, DE
Ville PAASIKALLIO · Porvoo, FI
Antti Kurkijärvi · Porvoo, FI

Key dates

Filing date	Oct 28, 2021
Grant date	Apr 9, 2024
Priority date	—
Expiry date	Oct 28, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10G2300/1003
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The present disclosure relates to methods for processing liquefied waste polymers containing diolefins and naphtha. Hydrotreatment A of the diolefins produces a diolefin depleted LWP feed which is separated by distillation B to give rise to one or more distillates containing at least a naphtha fraction, an optional middle fraction and a distillation bottom. Hydroprocessing C of the naphtha fraction gives rise to hydrogenated naphtha fraction which is suitable as a feed for a steam cracker D. The distillation bottom and the middle fraction can mixed with crude oil and used in oil refinerery since they are predominantly free from diolefins.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.