Patent · US Expired

Cleaning method

US4720306A · kind A · utility

8Cited by

15References

5Claims

0Family size

Assignee

Kraftwerk Union Aktiengesellschaft · DE

Inventors

Hermann Emmert · Burgbernheim, DE
Herbert Hehs · Baden, CH
Detlev Coerlin · Erlangen, DE
Klaus Kuhnke · Erlangen, DE

Key dates

Filing date	Apr 15, 1986
Grant date	Jan 19, 1988
Priority date	—
Expiry date	Apr 15, 2006

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF22B37/483
WIPO fieldThermal processes and apparatus
WIPO sectorMechanical engineering

Abstract

Method for cleaning vessels and in particular, steam generators, having deposits which are dissolved chemically and removed mechanically. The copper compounds present in the deposits are dissolved chemically and subsequently, loose deposits and liquids are removed mechanically. Encrustations still remaining are softened chemically and finally, the loosened deposits as well as the remaining chemicals are flushed out.

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