Method for drying fine metal powders

Details Method for drying fine metal powders Method for drying fine metal powders

1987-07-06

1988-08-16

Warner, Steven E.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

F26B 300

Patent

active

047634235

ABSTRACT:
A method is disclosed for removing essentially all of the water from fine metal powders. The method involves contacting the powder particles which have water on at least some of the particle surfaces with a solution of a fluorocarbon solvent and a hydrophobic surfactant, with the amount of the surfactant being sufficient to form at least a monolayer adsorbed onto the particle surfaces, and with the amount of the solution being sufficient to at least fill the void volume of the particles, to displace essentially all of the water which is in contact with the water. The displaced water and the major portion of the solution which is not in direct contact with the powder is physically removed from the resulting treated powder. The powder is then dried at a temperature above the vaporization temperature of the fluorocarbon at the operating pressure of the drying equipment to remove the remainder of the fluorocarbon from the treated powder without removing significant amounts of surfactant therefrom. Alternately, if it is desired that the remainder of the surfactant be removed, the treated powder is dried at a temperature above the vaporization temperature of the surfactant.

REFERENCES:
patent: 3653983 (1972-04-01), Ziehr et al.
patent: 3903012 (1975-09-01), Brandreth
patent: 4105747 (1978-08-01), Eisele et al.
patent: 4286390 (1981-09-01), Convers et al.
patent: 4686774 (1987-08-01), Hiraiwa et al.
patent: 4696114 (1987-09-01), Duval

Affiliated with

Also associated with

Rating

Method for drying fine metal powders does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for drying fine metal powders, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for drying fine metal powders will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-592753