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Method of separating rhenium and/or osmium from crude oil

A crude oil and element technology, applied in the field of separating rhenium and/or osmium elements, can solve the problems of affecting accuracy, affecting the accuracy of determining geological age, affecting the accuracy of geological age, etc., and achieving the effect of reducing pollution

Inactive Publication Date: 2018-02-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current method for the enrichment and separation of Re and Os elements in crude oil does not involve how to remove the Re and Os elements contained in crude oil adsorbed water and adsorbed sediment particles, which affects the accuracy of the final results to a certain extent. Affected the accuracy of the Re-Os isotope dating method Re, Os determination of geological age
[0005] In a word, the water-soluble inorganic components and minerals in the unseparated crude oil in the existing processing methods have an impact on the later analysis results, to a certain extent, the accuracy of the final results, and the Re-Os isotope dating method Accuracy of Determination of Geological Age by Re and Os

Method used

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  • Method of separating rhenium and/or osmium from crude oil
  • Method of separating rhenium and/or osmium from crude oil

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Add 5 times the volume of ultrapure water to a certain amount of crude oil sample, extract and separate at room temperature for 4 hours, then centrifuge for 60 minutes in a centrifuge, filter with filter paper to separate and remove the aqueous solution and possible inorganic minerals. Weigh the separated oil sample, add n-pentane in a volume ratio of 1:4, and dissolve in ultrasonic for 4 hours to precipitate asphaltenes. Centrifuge on a centrifuge for 15 minutes (2000 rpm) to separate the asphaltenes. After the solvent evaporates and dry, weigh about 0.2 g of the asphaltene sample into the Carlos tube, freeze with ethanol + liquid nitrogen, and add an accurate weighing Take the Re-Os mixed diluent, add 2mL concentrated HCl, 5mL concentrated HNO 3 , 2mL H 2 O 2 (Mass fraction 30%), then put the sealed Carlos tube with a steel sleeve and put it in the oven, and use the temperature program to digest the sample. The temperature will be increased from room temperature to 120℃...

Embodiment 2

[0036] Accurately weigh approximately 0.2g of the crushed solid asphalt sample (accurate to 0.00001g), transfer it into the Carlos tube through a glass long-necked funnel, freeze the Carlos tube with ethanol + liquid nitrogen, add the accurately weighed Re-Os to mix and dilute Use 2mL HC1 to completely flush the mixed diluent to the bottom of the Carlos tube in two times, add liquid nitrogen to the insulation barrel to ensure that the solution in the Carlos tube is frozen, then add 5mL HNO 3 And pay attention to the use of HNO 3 Rinse the sample powder that may remain on the mouth of the funnel; wait for HNO to be added 3 After freezing, add 2mL H 2 O 2 . During this process, observe the solution in the Carlos tube at any time, replenish the liquid nitrogen, keep it frozen, and seal the tube with a LPG-oxygen flame.

[0037] After the solution in the lower part is thawed, put the steel jacket on and put it in the oven, use the temperature program to digest the sample, increase the...

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Abstract

The invention provides a method of separating rhenium and / or osmium from crude oil. The method comprises following steps: step one, adding water into a crude oil sample to carry out extraction and separation to remove rhenium and osmium in crude oil absorption water and absorption sediment particles; step two, adding C4-C8 alkane into the crude oil sample processed in the step one so as to precipitate asphaltene in the crude oil sample; step three, digesting precipitated asphaltene; step four, separating osmium from digested sample by an in-situ distillation method; and step five, separating rhenium from the sample processed in the step four through an acetone extraction method. The provided method can improve the precision and accuracy of measurement of Re and Os in a Re-Os isotope datingmethod, and the requirements on Re and Os measurement of the Re-Os isotope dating method can be satisfied.

Description

Technical field [0001] The invention relates to a method for separating rhenium and / or osmium from crude oil. Background technique [0002] Different types of organic-rich geological samples can be enriched with elements such as rhenium (Re) and osmium (Os). Studies have found that metal elements such as Re and Os can be stored in the form of organic complexes (temperature <350℃) in crude oil, In asphalt and kerogen, metal elements such as Re and Os can be stored stably in crude oil, asphalt and kerogen for a long time. The isotope system is not easily destroyed by later transformation and maintains a good seal. This is for the use of crude oil, asphalt and cheese. Dating methods such as trace metal Re-Os in roots to obtain the age of oil and gas generation and migration provide important theoretical premises. In recent years, as a powerful tool for dating and tracing, the Re-Os isotope system has been widely used in the study of black rock series, oil shale, asphalt, crude o...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 马亮帮王杰腾格尔陶成刘文汇李广友葛颖
Owner CHINA PETROLEUM & CHEM CORP
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