Patent · US Active

Method for controlling the process for making isocyanates

US10227294B2 · kind B2 · utility

0Cited by

1References

15Claims

0Family size

Assignee

HUNTSMAN INTERNATIONAL LLC · US

Inventors

Peter Muller · Leverkusen, DE
Robert Henry Carr · Oud-Heverlee, BE

Key dates

Filing date	Sep 28, 2016
Grant date	Mar 12, 2019
Priority date	—
Expiry date	Sep 28, 2036

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C265/14
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a method for preparing an aromatic polyisocyanate in an isocyanate plant comprising a reaction section for a phosgenation reaction, wherein a primary aromatic amine is reacted with phosgene compounds in a reaction section to obtain an isocyanate comprising reaction product and wherein CO2 concentration in the gases coming from the reaction section is measured and analyzed, and wherein the conditions in the phosgenation reaction are adjusted in case the CO2 concentration in the gases coming from the reaction section is higher than a background CO2 concentration.

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