Societe Nationale Des Poudres Et Explosifs

Societe Nationale Des Poudres Et Expolsifs, Antar Petroles De

Roger Maurice Rat

Francois A Pollozec

Jacques Plazanet

Jean Joseph Patouillet

Dilute solutions of corrosive products, such as sulphuric or phosphoric acid, are concentrated by pre-concentrating the dilute solution and then introducing the pre-concentrated solution into a tunnel in which it flows in a thin layer over successive cascades while being heated, preferably by indirect radiant heating. An installation for carrying out the process is also described.

Process and installation for concentrating dilute solutions of corrosive

A process for the production of plasticised nitrocellulose in the form designated 'semi-chips', comprises impregnating nitrocellulose flock while the latter is present in a stirred suspension in water, separating the plasticised nitrocellulose obtained from the suspension, and drying at a temperature not exceeding 60.degree. C. The novel nitrocellulose 'semi-chips' and the novel apparatus to carry out the invention are also described.

Growing community of inventors

Saint-Medard-en-Jalles, France

Roger Maurice Rat