Patent · US Active

Process and apparatus for preparing purified styrene composition from styrene containing feedstock

US11919853B2 · kind B2 · utility

0Cited by

3References

12Claims

0Family size

Assignee

Sulzer Management AG · CH

Inventors

Rahul Khandelwal · Houston, US
Joseph C. Gentry · Houston, US
Randi W. Wytcherley · Bozeman, US
Kimberly Anderson · Bozeman, US
Meta Naulita-Ellis · Bozeman, US
Claudia Pudack · Zürich, CH
Celine Rioual · Chalampé, FR
Christoph Kirschner · Volketswil, CH
B. Bryant Slimp · Houston, US
Manfred Stepanski · Buchs, CH
Erik Temmel · Basel, CH

Key dates

Filing date	May 7, 2021
Grant date	Mar 5, 2024
Priority date	—
Expiry date	May 7, 2041

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2009/0086
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method for preparing a purified styrene composition is provided. The method includes providing a crude composition and subjecting the crude composition to at least one crystallization step. The crude composition contains 70% by weight or more styrene based on the total weight of the crude composition. The at least one crystallization step comprises at least one of a static crystallization stage and a dynamic crystallization stage. The crude composition contains at least one impurity selected from the group consisting of: color inducing species, oxygenates, sulfur species, alpha-methylstyrene, and mixtures thereof.

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