Patent · US Expired

Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle

US4030969A · kind A · utility

5Cited by

5References

2Claims

0Family size

Assignee

Defibrator AB · SE

Inventors

Arne Asplund · Sollentuna, SE
Rolf B. Reinhall · Bellevue, US
Per Johan Ingemar Ahrel

Key dates

Filing date	Jan 20, 1975
Grant date	Jun 21, 1977
Priority date	—
Expiry date	Jan 20, 1995

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C9/1026
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A stream of disintegrated fibrous cellulosic pulp material and steam under pressure is subjected to an instantaneous pressure reduction as said stream and steam pass through a throttling nozzle, in a throttling zone, wherein a liquid solution of a bleaching agent is admixed with said stream and which stream, admixed with bleaching agent, is then passed into an expansion zone ahead of the throttling nozzle resulting in a uniform dispersion of the bleaching agent into the fibers in the stream of fibrous cellulosic pulp material.

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