procedimanto for the preparation of a membrane right in pvdf for microfiltrazione, distillation, and special fabrics and its use.

摘要

the invention relates to a process for preparing membranes for reverse osmosis and the membranes produced by this process.the invention also concerns a process for preparing membranes for reverse osmosis based on polipiperazinammide obtainable through the introduction of a stage of evaporation controlled dthe speed of the transport gas of the solvent present in the nascent membrane at the time of writing.according to the invention, the speed of the transport gas of the solvent present in the nascent membrane is regulated by a coefficient of evaporation called ke.advantages of the invention compared to previously patented methods are: 1.the membrane is subject of this invention may be produced with speed higher than the speed of production of polipiperazinammide membranes prepared with methods that do not fall withinthis brevetto.2.the membrane modules wrapped in spiral membrane prepared with the subject of this invention are characterized by scale of which is higher than those so far rejected products.