Extraction method of organic sulphur in carbonate rocks with low organic matter content

A technology of organic matter content and carbonate rock, which is applied to the extraction of organic sulfur in carbonate rock and the field of organic sulfur extraction, can solve the problems of inaccurate measurement of organic sulfur content and isotopic composition, and achieves high accuracy and simple operation. , the effect of low execution cost

Active Publication Date: 2018-06-12

INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI

8 Cites 7 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0005] The invention provides a method for extracting organic sulfur in carbonate rocks with low organic matter content. The method is simple to operate, can eliminate the influence of non-organic sulfur in carbonate rock samples on the extraction of organic sulfur, and improves the efficiency and efficiency of organic sulfur extraction. Accuracy, thus ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Method used

In addition, the present invention can further realize the maximization of the effect of acid treatment to the temperature and time limitation of the first acid treatment, the second acid treatment, the third acid treatment and the fourth acid treatment, so that the carbonate rock contains Electron-rich substances are separated and removed as much as possible.

The...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Abstract

The invention provides an extraction method of organic sulphur in carbonate rocks with low organic matter content. The extraction method comprises the following steps: 1) performing acid treatment oncarbonate rock samples to obtain acid treatment residual samples; 2) performing separation treatment on the acid treatment residual samples by using heavy fluid to obtain a first organic matter product; 3) performing pyrite removal treatment on the first organic matter product to obtain a second organic matter product; 4) dissolving the second organic matter product to obtain a targeted solution,and converting the organic sulphur in the targeted solution into precipitants, wherein a sulphur element in the precipitants is the organic sulphur in the carbonate rock samples. The method is easy tooperate, can eliminate an influence of non-organic sulphur in the carbonate rock samples on extraction of the organic sulphur, and can improve the purity of extracted organic sulphur.

Application Domain

Preparing sample for investigation

Technology Topic

Carbonate rockAcid treatment +5

Examples

Experimental program(1)

Example Embodiment

[0085] Example

[0086] 1. Acid treatment

[0087] Step a: Weigh 300g of the carbonate rock sample powder that has been ground to 200 mesh, while stirring, pour the carbonate rock sample powder into 600ml of 6N hydrochloric acid, and react at 60°C for 2h to produce The first acid treatment of the carbonate rock sample. When the reaction is over, discard the acid solution.

[0088] Step b: While stirring, pour 800ml of 6N hydrochloric acid into the first acid-treated carbonate rock sample, and react at 60°C for 2h to generate a second acid-treated residual sample. When the reaction is over, discard the acid solution, and use distilled water to wash the remaining solid sample until it is weakly acidic, that is, the pH is 5-7.

[0089] Step c: While stirring, pour the mixture of hydrochloric acid and hydrofluoric acid with a total volume of 700 ml into the second acid treatment residue, and react at 60° C. for 2 hours to generate the third acid treatment residue. And in the mixture, the volume ratio of 6N hydrochloric acid to hydrofluoric acid is 3:1, and the concentration of hydrochloric acid is 6N. When the reaction is over, discard the acid solution, and use distilled water to wash the remaining solid sample until it is weakly acidic, that is, the pH is 5-7.

[0090] Step d: While stirring, pour 700 ml of 6N hydrochloric acid into the third acid treatment residue, and react at 60° C. for 1 hour to generate an acid treatment residue. When the reaction is over, the acid solution is discarded, and the remaining solid sample is washed with distilled water to neutral, that is, the pH is 7.

[0091] 3. Separation treatment

[0092] Set the density to 2.1g/cm 3 Place the heavy liquid and the acid-treated remaining sample in a centrifuge tube, shake well and centrifuge at 2000 rpm for 20 minutes. After stratification, remove the organic matter floating on the upper part of the heavy liquid, and resuspend the bottom residue in the same way Suspend and separate until there are no floating substances. Collect all insoluble organic matter together and wash with distilled water to neutrality to obtain the first organic matter product. Among them, the volume-to-mass ratio of the heavy liquid to the remaining sample after the acid treatment is 5ml:1g.

[0093] 4. Removal of pyrite

[0094] Mix enough zinc granules, 6N hydrochloric acid and chromium chloride, add the first organic product and perform a reduction reaction at 80°C to convert the sulfur element in the pyrite in the first organic product into hydrogen sulfide gas and escape , The reaction liquid is finally filtered, and the filter cake is the second organic product.

[0095] 5. Dissolution and precipitation treatment

[0096] Put the second organic matter product and deionized water into the oxygen combustion bomb produced by Parr, deflagrate and oxidize in 25atm pure oxygen, and the generated sulfur dioxide is dissolved in deionized water to form an intermediate target solution (sulfuric acid and part of sulfurous acid solution); After diluting the intermediate target solution with deionized water, pure bromine water is added to oxidize the sulfurous acid in the solution to sulfuric acid.

[0097] Add an excess of 10% barium chloride solution to the above sulfuric acid solution, precipitate, filter, wash the precipitate with deionized water, dry it, and weigh it. The precipitate is the barium sulfate precipitate, the source of sulfur in the barium sulfate Organic sulfur in carbonate rocks.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

PUM

Property	Measurement	Unit
Granularity	200.0	mesh
Density	2.05 ~ 2.1	g/cm³
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Login to view more

Classification and recommendation of technical efficacy words

Improve extraction efficiency
Improve accuracy

Extraction method of organic sulphur in carbonate rocks with low organic matter content

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Exposure apparatus and device fabrication method

Integrated vehicle motion control system

Apparatus for monitoring a person's heart rate and/or heart rate variation; wrist-watch comprising the same

Method for efficient storage of metadata in flash memory

Automatically Mining Person Models of Celebrities for Visual Search Applications

Classification and recommendation of technical efficacy words

Cannabis sailve extract rich in cannabidiol and preparation method of cannabis sailve extract

Preparation process for collagen sponge

Epoxypropane purifying method

Production process of dipping agent bitumen

Method of preparing Grosvenor momordica extract and application thereof

System and Method for Synthetic Interaction with User and Devices

Cassette-based dialysis medical fluid therapy systems, apparatuses and methods

Golf club head with adjustable vibration-absorbing capacity

Direct fabrication of aligners for palate expansion and other applications

Automated method and system for determining the state of well operations and performing process evaluation