Patent · US Active

Separation of a phosgene- and hydrogen chloride-comprising stream

US10252912B2 · kind B2 · utility

1Cited by

2References

9Claims

0Family size

Assignee

BASF SE

Inventors

Heiner Schelling · Ludwigshafen, DE
Torsten Mattke · Ludwigshafen am Rhein, DE
Hans-Juergen Pallasch · Ludwigshafen, DE
Kai Thiele · Ekeren, BE

Key dates

Filing date	Mar 10, 2016
Grant date	Apr 9, 2019
Priority date	—
Expiry date	Mar 26, 2036

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF25J3/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method of separating a phosgene- and hydrogen chloride-comprising stream (5), wherein said method comprises conveying the hydrogen chloride- and phosgene-comprising stream (5) into a distillation column (1), withdrawing at the bottom of the distillation column (1) a phosgene-comprising stream (7) and withdrawing at the top of the column an essentially hydrogen chloride-comprising stream (9). At least a portion of the stream (9) withdrawn at the top is compressed and at least partially condensed and at least a portion of the liquid and compressed essentially hydrogen chloride-comprising stream is decompressed and recycled into the top of distillation column (1) as reflux.

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