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It can be used to extract gold, silver and other precious metals from cyanide solutions, such as those used in gold mines, to determine the levels of those dissolved metals. Diisobutyl ketone (DIBK), a related lipophilic ketone, is also used for this purpose. Methyl isobutyl ketone is also used as a denaturing agent for denatured alcohol.
Another example of early chemical coloring of metals is the Nebra sky disk, which has a green patina and gold inlays. An early example of black colored iron is the famous Celtic spearhead found in the River Thames and dated between 200 and 50 BC. [4] [5]
Acetone (2-propanone or dimethyl ketone) is an organic compound with the formula (CH 3) 2 CO. [22] It is the simplest and smallest ketone (>C=O).It is a colorless, highly volatile, and flammable liquid with a characteristic pungent odour, very reminiscent of the smell of pear drops.
Acetone and acetic anhydride ((CH 3 C(O)) 2 O) upon the addition of boron trifluoride (BF 3) catalyst: [11] (CH 3 C(O)) 2 O + CH 3 C(O)CH 3 → CH 3 C(O)CH 2 C(O)CH 3 A second synthesis involves the base-catalyzed condensation (e.g., by sodium ethoxide CH 3 CH 2 O − Na + ) of acetone and ethyl acetate , followed by acidification of the sodium ...
Clicks Retail Group is a group of healthcare, beauty, music and lifestyle products retail chains and brands based in South Africa, including Clicks pharmacies. The company was founded in Cape Town by Jack Goldin in 1968 and operates over 670 retail outlets in southern Africa . [ 1 ]
Whether it's a strength of this year's group or optimism for next season, every NFL team has at least one reason to be thankful.
AOL Desktop Gold combines all the things that you know and love about AOL, with the speed and reliability of the latest technology.
3. On the Sign On screen, click the small arrow pointing down to bring up a list of all stored usernames. 4. Select the desired username by clicking on it. Click Continue once you selected the username. 5. Once you click Continue a new window appears. Check if the correct username is displayed and click Continue. 6.