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2 089 798

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C1

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IPC

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Application

93041783/06, 1993-08-20

(22)

Actual filing date

1993-08-20

(45)

Published

1997-09-10

(72)

Inventor

Ol'Shanskij Eh.E.

(73)

Holder

Balashikhinskoe Nauchno-Proizvodstvennoe Ob"Edinenie Kriogennogo Mashinostroenija Im.40 Letija Oktjabrja

METHOD OF PRODUCTION OF LIQUID NITROGEN Russian patent published in 1997 - IPC

Abstract RU 2089798 C1

FIELD: inorganic chemistry. SUBSTANCE: proposed method may be applied for plants of low productivity (about 2 t/h) at pressure of air separated after compressor of 0.1-1 MPa. At isothermic efficiency of compressor of 0.65 and adiabatic efficiency of expansion machine of 0.8, power requirement of compressor may be reduced to 0.85 kW-h/kg per kg of liquid nitrogen. To this end, bottoms vapors are heated to temperature higher than temperature of beginning of expansion of air; vapors are expanded and are directed for cooling. EFFECT: reduced power requirements. 1 dwg

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RU 2 089 798 C1

Authors

Ol'Shanskij Eh.E.

Dates

1997-09-10—Published

1993-08-20—Filed

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