Froth moderating agent for controlling froth and reducing stickies in the flotation process for deinking waste paper,申请号US19970887028-传众专利搜索

Froth moderating agent for controlling froth and reducing stickies in the flotation process for deinking waste paper

申请公布号：US6013157(A)

申请号：US19970887028

申请日期：1997.07.02

申请公布日期：2000.01.11

申请人：

BASF CORPORATION

发明人：LI, CHIN;LONGHINI, DAVID A.;VIJAYENDRAR, BHIMA R.

分类号：B03D1/008;D21B1/32;D21C5/02;(IPC1-7):D21C5/02

主分类号：B03D1/008

摘要：Describes flotation deinking of secondary fiber using a froth moderating agent, a composition of the froth moderating agent with flotation deinking chemicals, and reducing the amount of stickies in separated seconday fiber. The froth moderating agent is selected from the group consisting of: (a) nonionic surfactant material represented by the formula:R-C6H4O-(C2H4O)m-(C3H6O)n-(C4H8O)p-R1 wherein R is an aliphatic hydrocarbon group containing from about 5 to 20 carbon atoms, R1 is selected from the group consisting of chloro, C1-C3 alkyl, C1-C5 alkoxy and phenoxy, m, n, and p are each a number of between 0 and about 50, and the sum of m, n, and p is between about 1 and 50; (b) fatty acid esters of sorbitan; (c) certain alkoxylated fatty acid esters of sorbitan; (d) polypropylene glycol being at least 50 weight percent soluble in water; and (e) a combination of at least two of the materials selected from the group consisting of (a), (b), (c) and (d). Also described is the use of a froth controlling amount of nonionic surfactant material (a) alone or in combination with flotation deinking chemicals or other froth moderating agents in reducing the amount of stickies and enhancing the removal of electrostatic inks in the flotation deinking process.