الفهرس 
contentsOnly 14 pages are availabe for public view
 |  | from | 305 |  |  |
| | | from | 305 | | |
Abstract
The present work shared in the trials exerted to support ~otton against the drastic competition of expanding artificial fibres through improvements in quality and decrease in producGion cost of cotton finishing processes; namely, bleaching, lyeing and final finishing. Such trials receive atmost cons iieration especially in countries like U.A.R. whose National [ncome largely depends on cotton trade, particularly in the I”orld market.
As a start, apart from the traditional hypochlorite bleacn-
.ng process, interest was directed towards the recent ever-incrlasing advantageous method of continuous peroxide bleaching. ~hrough the systematic study of problems of stabilisation of eroxide baths, the chemical agents used for this purpose and ;he disadvantages suffered from the ever-used sodium silicate ltabiliser, useful results were deduced. The hardness-forming lalts normally present in most natural waters were proved to be lssential for efficient stabilisation; thus, an end was put to ;he confusion in literature in this respect. The magnesium
:alts and oalcium salts were found to be of particular interest, lach. Magnesium salts gave str.ikingly strong stabilisation even .f present in traces in the order of approx. 16 mg/l, calculated ,s the chloride (20 mg/l. as MgS04). Although calcium salts :ffectively stabi.lised the peroxide bleaching baths between relaively higher concentrations of 100 to 1000 mg/l- calculated as he chloride, yet they presented the advantage, over magnesium ,