Patent · US Active

Process for preparing dialkyl 1,4-cyclohexanedicarboxylates

US11845849B2 · kind B2 · utility

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19Claims

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Assignee

Evonik Operations GmbH · DE

Inventors

Johannes Kraft · Niederkassel, DE
Lena Altmann · Recklinghausen, DE
Johan Anton · Dorsten, DE
Michael Grass · Bend, US
Thomas Schneider · Frederick, US

Key dates

Filing date	Jul 26, 2021
Grant date	Dec 19, 2023
Priority date	—
Expiry date	Feb 3, 2042

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/582
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process prepares dialkyl 1,4-cyclohexanedicarboxylates by ring hydrogenation of the corresponding dialkyl terephthalate having a CO value of less than 0.3 mg KOH/g. The dialkyl 1,4-cyclohexanedicarboxylates thus produced can be used as plasticizers or as a component of a plasticizer composition for plastics, in particular PVC.

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