Patent · US Expired

Method for preparing triethylenediamine (TEDA)

US7754139B2 · kind B2 · utility

0Cited by

17References

15Claims

0Family size

Assignee

BASF SE

Inventors

Marco Bosch · Mannheim, DE
Bernd Stein · San Diego, US
Matthias Frauenkron · Freinsheim, DE
Ulrich Müller · Neustadt, DE

Key dates

Filing date	Jun 4, 2004
Grant date	Jul 13, 2010
Priority date	—
Expiry date	Oct 18, 2024

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2229/36
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An increase in the cutting hardness of a shaped body comprising a crystalline aluminosilicate is achieved by treating the shaped body with a gas comprising water vapor at from 100 to 600° C. and an absolute pressure of from 0.1 to 10 bar for a period of at least 20 hours, and this shaped body having an increased cutting hardness can be used in processes for chemical synthesis, in particular in a process for preparing triethylenediamine (TEDA) by reaction of ethylenediamine (EDA) and/or piperazine (PIP).

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