Process for the production of carbon dioxide absorption agent pe

Details Process for the production of carbon dioxide absorption agent pe Process for the production of carbon dioxide absorption agent pe

1979-07-17

1980-11-11

Shine, W. J.

Compositions

X-ray or neutron shield

B01J 2302

Patent

active

042331900

ABSTRACT:
A process for the production of carbon dioxide absorption agent pellets for respiration equipment is carried out using a moving conveyor having a surface with shaped depressions therein and finely ground lime is continuously added with water as it is moved through a slaking zone to slake the lime and subsequently the slaked lime is continuously kneaded as it is moved through a moving zone to form a pasty mass, the pasty mass being pressed into the shaped depressions of the conveyor, and thereafter drying the material in the shaped depressions to form carbon dioxide absorption pellets, and subsequently ejecting the pellets from the depressions.
The reaction temperature of the mass maintained in the slaking zone is over 60.degree. C., and in the kneading zone it is maintained below 80.degree. C. The process is characterized by the use of electric conductivity of the mass to regulate the mass throughput, and the viscosity is used as a measurement to regulate the quantity of water which is added to slake the lime. The apparatus for carrying out the process includes a twin screw conveyor having a proportioning section and a slaking section and a kneading section, with temperature controls for the slaking and kneading section, and which discharges to a knifing device which applies the material into depressions of a moving conveyor for subsequent drying and removal.

REFERENCES:
patent: 2147191 (1939-02-01), Carson
patent: 2784062 (1957-03-01), Locke et al.
patent: 2894820 (1959-07-01), Rikard et al.
patent: 3511600 (1970-05-01), Kim

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