from 0 25 mm polyethene film the inner surface of the film was black and the outer surface white providing efficient protection for the pulp against light and oxygen the pulp was allowed to cool off and stabilize outdoors and the bags were stored in an outdoor storage the treated pulp which had been stored for about 6 months was used as raw material for sugar beet pectin the composition of the pulp was as follows 25 percent by weight of dry substance ensimax 0 4 percent by weight free sugars below 1 percent by weight acid hydrolysis was performed first ph 1 5 temperature 70 u00b0 c the hydrolysate was neutralized with sodium carbonate to ph 3 and the solution was separated from insoluble pulp by a decanting centrifuge and filtered by what is known as precoat filtration in the presence of a filtration additive the filtered solution was concentrated by evaporation below 60 u00b0 c to a dry substance content of 9 percent by weight pectin was precipitated from the concentrated solution by addition of isopropanol so that the solution contained 75 percent by weight of isopropanol the precipitated pectin was washed with a 60 isopropanol solution separated by centrifugation and dried in an air current at 50 u00b0 c the yield was 15 percent by weight of pectin of pulp dry substance fresh pressed pulp was pre treated as in example 1 and the pretreated stable pulp was taken out of storage after 8 months the pulp was hydrolyzed at ph 12 temperature 95 u00b0 c by addition of milk of lime the hydrolysate was neutralized with carbon dioxide and the pulp was separated from the solution by a.