Supercharge Your Innovation With Domain-Expert AI Agents!

Method for removing graphite carbon in nanometer diamond ash prepared by detonation technique

A technology of nano-diamond and graphite carbon, which is applied in the direction of diamond and nanotechnology, can solve the problems of low product purity, many environmental problems, and high equipment requirements, and achieve the effect of simple process, high product purity, and low equipment requirements

Inactive Publication Date: 2012-08-01
江苏金海丰硬质材料科技有限公司
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Valerii Yu. Dolmatov introduced a variety of chemical oxidation techniques in Ultracrystalline Diamond-Sytheses, Properties and Applications (Willian Andrew Publishing, NewYork, 2006), including perchloric acid, concentrated sulfuric acid + nitric acid, sulfuric acid + chromium trioxide, ozone , nitric acid, etc., among which sulfuric acid + nitric acid has formed an industrial scale, but this method is under high temperature and high pressure (280 o C) The reaction requires very high equipment, and the corrosion is serious, and the product purity is not high
CN1385366A and CN01114455.6 disclose to use potassium permanganate+concentrated sulfuric acid at 100-250 o Under the condition of C, the oxidation purification method is carried out. The removal effect of this method for graphitic carbon is not very obvious. At the same time, the wastewater contains heavy metal manganese, and there are many environmental problems.
CN1400162A discloses the removal of graphite carbon under the boiling state of concentrated sulfuric acid+concentrated nitric acid. This method has poor removal effect for graphite carbon, and at the same time, because nitric acid is easily decomposed at high temperature, the utilization rate is low
The literature "New Technology and New Process" (2006 (1): 110-112) and "Journal of North University of China" (2006, 27 (1): 55-58) use gas phase oxidation to remove graphite carbon, which is more operable. Poor, at the same time the effect is very unsatisfactory

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing graphite carbon in nanometer diamond ash prepared by detonation technique
  • Method for removing graphite carbon in nanometer diamond ash prepared by detonation technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: in 50L reactor, put into the 98% sulfuric acid of 6.0kg, add 3.00kg nano-diamond ash material under stirring, be warming up to 110 under vacuum condition o C, add 20.0kg of 40% perchloric acid dropwise, and control the temperature in the kettle to 170-250°C during the dropwise addition o C, 170 after dropping o C for 2 hours, cool to 40 o C, put into 50L deionized water, filter, and fully wash with deionized water until the filtrate is neutral, vacuum-dried to obtain 1.12kg of off-white product of purification, yield 37.3%, the XRD spectrum of the product is shown in figure 1 (b).

Embodiment 2

[0010] Embodiment 2: in 50L reactor, put into the 90% sulfuric acid of 25.5kg, add 3.00kg nano-diamond ash material under stirring, be warming up to 180 under vacuum condition o C, add 15.0kg of 55% perchloric acid dropwise, and control the temperature in the kettle to 170-250°C during the dropwise addition o C, the dropwise addition is completed 210 o C for 6 hours, cool to 40 o C, put into 18L deionized water, filter, and fully wash with deionized water until the filtrate is neutral, and vacuum-dry to obtain 1.07kg of a purified off-white product, with a yield of 35.7%.

Embodiment 3

[0011] Embodiment 3: in 50L reactor, put into the 85% sulfuric acid of 20.0kg, add 3.00kg nano-diamond ash material under stirring, be warming up to 250 under vacuum condition o C, add 10.0kg of 70% perchloric acid dropwise, and control the temperature in the kettle to 170-250°C during the dropwise addition o C, 250 after dropping o C for 10 hours, cool to 40 o C, put into 30L deionized water, filter, and fully wash with deionized water until the filtrate is neutral, and vacuum-dry to obtain 1.09kg of a purified off-white product, with a yield of 36.3%.

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

No PUM Login to View More

Abstract

Disclosed is a method for removing graphite carbon in nanometer diamond ash prepared by detonation technique. The graphite carbon in nanometer diamond is removed by a concentrated sulfuric acid and perchloric acid combination hydrocarbonylation at high temperature. Reaction steps include adding sufficiently dried nanometer diamond detonated ash into concentrated sulfuric acid solution with the mass concentration of 85-98% and the mass ratio 2-15 times of that of the nanometer diamond detonated ash; heating to the temperature ranging from 110 DEG C to 250 DEG C; dripping perchloric acid with the mass concentration of 40-70% and the mass ratio 1-20 times of that of the nanometer diamond detonated ash; insulating at the temperature ranging from 170 DEG C to 250 DEG C for 2-10 hours after dripping the perchloric acid; finally pouring the acid mixture into water with the volume 2-10 times of that of the acid; and filtering, washing and drying to obtain purified products. The method is simple in process, low in requirements to equipment and high in purity of the products. Produced nanometer diamond can completely meet application in relevant fields, particularly fields of ultra-precision polishing, advanced break-in (lubricating) oil, wear-resistant material additives, wear-resistant surface recombination plating and the like.

Description

technical field [0001] The invention relates to a method for purifying diamond, in particular to the removal of graphite-like carbon in nano-diamond ash material produced by explosive detonation. Background technique [0002] Nano-diamond has a wide range of uses in ultra-precision polishing, advanced running-in (lubricating) oil, wear-resistant material additives, wear-resistant surface composite plating and other fields. Under special process conditions, the detonation ash mixture containing a certain amount of diamond carbon can be prepared by means of explosive detonation. Among the ash impurities, graphitic carbon has the largest content and is the most difficult to remove. At present, the removal of graphitic carbon mainly includes chemical oxidation and high temperature air oxidation. Valerii Yu. Dolmatov introduced a variety of chemical oxidation techniques in Ultracrystalline Diamond-Sytheses, Properties and Applications (Willian Andrew Publishing, NewYork, 20...

Claims

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

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/06B82Y40/00C01B32/28
Inventor 陈守文解立新胡朝霞
Owner 江苏金海丰硬质材料科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com