摘要:
Textiles are washed with a liquid washing agent, softened water and salts of at least one polycarboxylic acid. The polycarboxylic acids are present in part as sodium salt and in part as calcium or magnesium salt.
摘要:
Iminodisuccinic acid alkaline salts can be prepared by reacting maleic acid anhydride (MAA), alkali metal hydroxide (MeOH), NH3 and water in a molar ratio of MAA : MeOH : NH3 : H2O = 2 : 0.1 - 4 : 1.1 - 6.5 : 5 - 30 at 70 - 170 °C and 1 - 80 bar for 0.1 - 100 hours. The reaction mixture is mixed with additional H2O and optionally MeOH and is freed distillatively of NH3 at 50-170 °C and 0.1-50 bar and then set at a solids content of 5 - 60 weight % using H2O. The iminodisuccinic acid alkaline salts can be used to increase the brightness and brilliance of plant fibres in paper manufacture.
摘要:
Textiles are washed with a liquid washing agent, softened water and salts of at least one polycarboxylic acid. The polycarboxylic acids are present in part as sodium salt and in part as calcium or magnesium salt.