Benzine And Mineral Lubricants
Benzine And Mineral Lubricants
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(2) Berthelot's Benzoyl Chloride Reaction. About 5 c. C. Of the sample are treated with two drops of benzoyl chloride, shaken up, and, after a few minutes, treated with caustic potash solution (1 : 10) until strongly alkaline. In presence of ethyl alcohol, the pleasant odour of ethyl benzoate will become apparent. This odour, however, may be masked by the smell of benzol or other aromatic substances in the sample.
(3) Acetaldehyde Test. This test consists in transforming the ethyl alcohol into ...acetaldehyde and identifying the latter. With this object, 1 c. C. Of the test sample is treated with 1 e. C. Of pure sulphuric acid, followed by the gradual addition of 20-25 c. C. Of a 1 per cent, solution of perman- ganate of potash and a sufficient quantity of cold-saturated oxalic acid solution (and another 1 c. C. Of sulphuric acid, if necessary) to decolorise any excess of permanganate.
94 BENZINE AND MINERAL LUBRICANTS The resulting acetaldehyde is then tested with Jean's reagent, 2 c. C.
What to read after Benzine And Mineral Lubricants?
You can find similar books in the "Read Also" column, or choose other free books by J Jaroslav Formnek to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
(2) Berthelot's Benzoyl Chloride Reaction. About 5 c. C. Of the sample are treated with two drops of benzoyl chloride, shaken up, and, after a few minutes, treated with caustic potash solution (1 : 10) until strongly alkaline. In presence of ethyl alcohol, the pleasant odour of ethyl benzoate will become apparent. This odour, however, may be masked by the smell of benzol or other aromatic substances in the sample.
(3) Acetaldehyde Test. This test consists in transforming the ethyl alcohol into ...acetaldehyde and identifying the latter. With this object, 1 c. C. Of the test sample is treated with 1 e. C. Of pure sulphuric acid, followed by the gradual addition of 20-25 c. C. Of a 1 per cent, solution of perman- ganate of potash and a sufficient quantity of cold-saturated oxalic acid solution (and another 1 c. C. Of sulphuric acid, if necessary) to decolorise any excess of permanganate.
94 BENZINE AND MINERAL LUBRICANTS The resulting acetaldehyde is then tested with Jean's reagent, 2 c. C.
What to read after Benzine And Mineral Lubricants?
You can find similar books in the "Read Also" column, or choose other free books by J Jaroslav Formnek to read onlineMoreLess
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