RU1770271C - Method for purification of diamond from graphite - Google Patents
Method for purification of diamond from graphiteInfo
- Publication number
- RU1770271C RU1770271C SU884477670A SU4477670A RU1770271C RU 1770271 C RU1770271 C RU 1770271C SU 884477670 A SU884477670 A SU 884477670A SU 4477670 A SU4477670 A SU 4477670A RU 1770271 C RU1770271 C RU 1770271C
- Authority
- RU
- Russia
- Prior art keywords
- diamond
- graphite
- sulfuric acid
- alkali metal
- nitric acid
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/25—Diamond
- C01B32/28—After-treatment, e.g. purification, irradiation, separation or recovery
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Изобретение относитс к химической технологии получени сверхтвердых материалов и позвол ет удешевить способ и улучшить услови труда. Готов т окислительную смесь состава, мас.%: свободный ангидрид 1-19, азотна кислота или нитрат щелочного металла или аммони 1-16, серна кислота - осталь- ное. Полученную сцесь смешивают с алмазсодержащим продуктом, нагревают до 160-230°С и выдерживают 5-40 мин. Затем после охлаждени провод т выделение алмаза , промывку и сушку. Способ позвол ет организовать процесс очистки в непрерывном режиме с использованием малых объемов реакционного сосуда. 1 з.п. ф-лы, 1 табл,The invention relates to chemical technology for producing superhard materials and allows to reduce the cost of the method and improve working conditions. An oxidizing mixture of the composition is prepared, wt.%: Free anhydride 1-19, nitric acid or alkali metal or ammonium nitrate 1-16, sulfuric acid - the rest. The resulting sts was mixed with a diamond-containing product, heated to 160-230 ° C and held for 5-40 minutes. Then, after cooling, diamond separation, washing and drying are carried out. The method allows to organize the cleaning process in a continuous mode using small volumes of the reaction vessel. 1 s.p. f-ly, 1 table,
Description
Изобретение относитс к области химической технологии получени сверхтвердых материалов, а именно: обогащени искусственных алмазов.The invention relates to the field of chemical technology for producing superhard materials, namely: enrichment of artificial diamonds.
Целью изобретени вл етс удешевление способа и улучшение условий труда.The aim of the invention is to reduce the cost of the method and improve working conditions.
Пример.Example.
Готов т окислительную смесь свободного серного ангидрида, азотной кислоты или нитрата щелочного металла, или аммони и серной кислоты. Дл этого смешивают в нужных объемах и концентраци х олеум с азотной кислотой НЬЮз при перемешивании и температуре 25°С. Полученную смесь смешивают с обогащаемым продуктом и нагревают до температуры процесса очистки на электрической плитке в химической колбе и выдерживают при этой температуре до по влени осадка характерного светло-серого цвета, что свидетельствует об окончании реакции окислени графита. СмесьAn oxidizing mixture of free sulfuric anhydride, nitric acid or alkali metal nitrate, or ammonium and sulfuric acid is prepared. To do this, oleum is mixed with the desired volumes and concentrations with nitric acid HbO3 with stirring at a temperature of 25 ° C. The resulting mixture is mixed with the product to be enriched and heated to the temperature of the cleaning process on an electric stove in a chemical flask and kept at this temperature until a precipitate of a characteristic light gray color appears, which indicates the end of the graphite oxidation reaction. Mixture
охлаждают до комнатной температуры, отдел ю на центрифуге твердую фазу (алмаз), промывают водой до нейтральной среды и сушат в сушильном шкафу при температуре 160°С. Идентификацию алмаза осуществл ют рентгеноструктурным анализом на приборах ДРОН-2 или УРС-60 в FeKt и CuKi- излучени х.it is cooled to room temperature, the solid phase separated in a centrifuge (diamond), washed with water to a neutral medium and dried in an oven at a temperature of 160 ° C. Diamond identification is carried out by X-ray diffraction analysis using DRON-2 or URS-60 devices in FeKt and CuKi radiation.
Конкретные режимы проведени и результаты процессов очистки алмаза от графита приведены в таблице.The specific modes and results of the processes for cleaning diamond from graphite are shown in the table.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU884477670A RU1770271C (en) | 1988-07-09 | 1988-07-09 | Method for purification of diamond from graphite |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU884477670A RU1770271C (en) | 1988-07-09 | 1988-07-09 | Method for purification of diamond from graphite |
Publications (1)
Publication Number | Publication Date |
---|---|
RU1770271C true RU1770271C (en) | 1992-10-23 |
Family
ID=21397099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU884477670A RU1770271C (en) | 1988-07-09 | 1988-07-09 | Method for purification of diamond from graphite |
Country Status (1)
Country | Link |
---|---|
RU (1) | RU1770271C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0753481A1 (en) * | 1995-07-10 | 1997-01-15 | The Ishizuka Research Institute, Ltd. | Hydrophilic diamond particles and method of producing the same |
CN100424009C (en) * | 2005-11-30 | 2008-10-08 | 郑州人造金刚石及制品工程技术研究中心 | Method for purifying diamond synthetic block |
-
1988
- 1988-07-09 RU SU884477670A patent/RU1770271C/en active
Non-Patent Citations (1)
Title |
---|
Авторское свидетельство СССР №726803, кл. С 01 В 31/06, 1978. Гокштейн Я.П. и др. Окисление мелкодисперсного графита и ламповой сажи раствором СгОз и КгСгО в H2SO/1. Хими твердого топлива, 1969, № 1, с. 89-96. * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0753481A1 (en) * | 1995-07-10 | 1997-01-15 | The Ishizuka Research Institute, Ltd. | Hydrophilic diamond particles and method of producing the same |
NL1004834C2 (en) * | 1995-07-10 | 1998-06-22 | Akio Hiraki | Hydrophilic diamond particles and process for their manufacture. |
CN100424009C (en) * | 2005-11-30 | 2008-10-08 | 郑州人造金刚石及制品工程技术研究中心 | Method for purifying diamond synthetic block |
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