Patent · US Expired

Waste water treatment in a method for producing formic acid which is free of water

US6867329B2 · kind B2 · utility

15Cited by

1References

7Claims

0Family size

Assignee

BASF SE

Inventors

Heinz Auer · Neulußheim, DE
Bernd Bessling · Grünstadt, DE
Hans Hammer · Mannheim, DE
Hans Hasse · Kaiserslautern, DE
Friedrich Sauer · Grünstadt, DE
Maximilian Vicari · Schifferstadt, DE
Till Adrian · Frankenthal (Pfalz), DE

Key dates

Filing date	Jan 12, 2001
Grant date	Mar 15, 2005
Priority date	—
Expiry date	Jan 22, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2219/00006
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for obtaining anhydrous or substantially anhydrous formic acid, in which firstly aqueous formic acid is prepared by hydrolysis of methyl formate and is freed from water in the subsequent work-up. The process has the special feature that steam, which is employed for the hydrolysis of methyl formate and for heating a distillation column serving for work-up, is also used as stripping steam for waste-water stripping. The stripped waste water is produced during work-up.

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