Process for the radioactive decontamination of an oil
First Claim
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1. A process for the radioactive decontamination of an oil containing radioelements, comprising the steps of:
- (a) mixing said oil with a pulverulent material in the presence of an acid selected from the group consisting of hydrochloric acid, phosphoric acid, and sulfuric acid to form a mixture thereof;
(b) passing the mixture through a filter able to retain at least part of the pulverulent material; and
(c) repeating step (b) the number of times necessary to obtain a decontaminated oil filtrate and separating said decontaminated oil filtrate from the pulverulent material together with said radioelements.
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Abstract
According to the invention, the oil is passed through a pulverulent material, such as an earth or clay, in the presence of an acid. The pulverulent material can be placed beforehand on a filter or can be mixed with the oil before filtration. If necessary, the oil is recycled through the filter up to complete decontamination.
Application to the radioactive decontamination of oils used in the nuclear industry.
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Citations
15 Claims
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1. A process for the radioactive decontamination of an oil containing radioelements, comprising the steps of:
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(a) mixing said oil with a pulverulent material in the presence of an acid selected from the group consisting of hydrochloric acid, phosphoric acid, and sulfuric acid to form a mixture thereof; (b) passing the mixture through a filter able to retain at least part of the pulverulent material; and (c) repeating step (b) the number of times necessary to obtain a decontaminated oil filtrate and separating said decontaminated oil filtrate from the pulverulent material together with said radioelements. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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2. A process for the radioactive decontamination of oil containing radioelements comprising the steps of:
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(a) placing the pulverulent material on an upstream face of a filter for contact with said oil in the presence of an acid selected from the group consisting of hydrochloric acid, phosphoric acid, and sulfuric acid; (b) passing the oil through said filter covered with the pulverulent material; and (c) repeating step (b) the number of times necessary to obtain a decontaminated oil filtrate and separating said decontaminated oil filtrate from the pulverulent material together with said radioelements.
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- 3. A process for the radioactive decontamination of an oil containing radioelements, comprising contacting said oil with a pulverulent material while reacting a portion of the oil with an acid to provide filterable reaction products including tars having radioelements fixed thereto, and filtering said oil to separate said pulverulent material, reaction products and any other filterable constituents present in the oil from a filtrate of decontaminated oil, said acid being selected from the group consisting of hydrochloric acid, phosphoric acid and sulfuric acid.
Specification