Patent · US Expired

Plant for producing ammonium polyphosphate

US5158752A · kind A · utility

1Cited by

12References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Thomas Staffel · Grünstadt, DE
Gunther Schimmel · Lechenich, DE
Horst Buhl · Waiblingen, DE
Jurgen Grosse · Hürth, DE

Key dates

Filing date	Feb 19, 1991
Grant date	Oct 27, 1992
Priority date	—
Expiry date	Feb 19, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC05B13/06
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A plant for producing chain-type ammonium polyphosphate from ammonium orthophosphate and phosphorus pentoxide in the presence of gaseous ammonia comprises a reactor having rotatable mixing, kneading and comminuting tools in its interior and a feed pipe for the solid starting materials, an introduction pipe for ammonia, a gas discharge pipe and a discharge line for the reaction product, all of which are flow-connected to the interior of the reactor. The discharge line of the reactor is also connected for material flow to a mixing apparatus. A discharge device, which is controlled by the power consumption of the drive motor of the reactor, is arranged in the discharge line.

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