초록 ▼

Method and apparatus for removing trace levels of impurities from gases stored cryogenically in a storage vessel in liquid form by passing a vaporized portion of liquified gas from the storage vessel through a bed of adsorbent while using the liquified gas to cool the adsorbent. Vaporized gas result

Method and apparatus for removing trace levels of impurities from gases stored cryogenically in a storage vessel in liquid form by passing a vaporized portion of liquified gas from the storage vessel through a bed of adsorbent while using the liquified gas to cool the adsorbent. Vaporized gas resulting from cooling of the adsorbent with the stored liquified gas can be combined with the vapor withdrawn from the storage vessel prior to being passed through the bed of adsorbent. Liquified gas can be withdrawn from the storage vessel, vaporized and the vaporized gas combined with the vaporized gas from the storage vessel prior to being passed through the bed of adsorbent.

대표청구항 ▼

[ We claim:] [1.] An apparatus for removal of trace impurities from bulk quantities of gases stored in a storage vessel wherein there is a quantity of liquified gas and a quantity of vaporized gas comprising in combination:a treatment vessel for holding an adsorbent, said adsorbent of the type to re

[ We claim:] [1.] An apparatus for removal of trace impurities from bulk quantities of gases stored in a storage vessel wherein there is a quantity of liquified gas and a quantity of vaporized gas comprising in combination:a treatment vessel for holding an adsorbent, said adsorbent of the type to remove said trace impurities from the stored gas; said vessel including means to cool said adsorbent by contact with said stored liquified gas, and means to withdraw vaporized gas from said treatment vessel and introduce said vaporized gas into said adsorbent;means to withdraw liquified gas from said storage vessel and introduce it into said treatment vessel;means to withdraw vaporized gas from said storage vessel and introduce said vaporized gas into said adsorbent; andmeans to deliver vaporized gas from said adsorbent to a point of use.