Process for producing furnace atmospheres by deoxygenating non-c

Details Process for producing furnace atmospheres by deoxygenating non-c Process for producing furnace atmospheres by deoxygenating non-c

1992-12-22

1994-03-01

Langel, Wayne

Compositions

Gaseous compositions

Nitrogen and hydrogen containing

148230, 148238, 252374, 423351, C06D 700

Patent

active

052904806

ABSTRACT:
A process for producing low-cost furnace atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering non-ferrous metal and ceramic powders from non-cryogenically produced nitrogen containing from 0.05 to 5.0% residual oxygen is presented. The disclosed process involves 1) mixing non-cryogenically produced nitrogen with a predetermined amount of dissociated ammonia, 2) passing the mixture through a low-pressure drop catalytic reactor, 3) converting the residual oxygen to an acceptable form such as moisture and reducing the residual oxygen level to below about 10 ppm, and 4) using the resultant gaseous mixture for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering non-ferrous metal and ceramic powders. The key feature of the disclosed process involves the use of a novel low-pressure drop catalytic reactor for converting residual oxygen with dissociated ammonia to moisture.

REFERENCES:
patent: 2601221 (1952-06-01), Rosenblatt et al.
patent: 2606875 (1952-08-01), Rosenblatt et al.
patent: 3379507 (1968-04-01), Becker et al.
patent: 3598538 (1971-08-01), Peacock
patent: 4386972 (1983-06-01), Knight
P. Murzyn & L. Flores, Jr., Carburizing with Membrane N.sub.2 : Process and Quality Issues, Mar. 1988, pp. 28-32.
H. Walton; New Method of Generating Nitrogen for Controlled Atmosphere Heat Treatment at Torrington Shiloh Plant, Mar. 1986, pp. 40-46.
P. F. Strutton, The Use of Non-Cryogenically Produced Nitrogen in Furnace Atmospheres, 1989, pp. 63-67.
D. J. Bowe & D. L. Fung, How PSA Nitrogen Works in a Heat Treating Shop, pp. 30-33 (Nov., 1980).

Affiliated with

Also associated with

Rating

Process for producing furnace atmospheres by deoxygenating non-c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing furnace atmospheres by deoxygenating non-c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing furnace atmospheres by deoxygenating non-c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-574568