Lubricating And Allied Oils a Handbook for Chemists Engineers And Students
Lubricating And Allied Oils a Handbook for Chemists Engineers And Students
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The dry mass is extracted with alcohol-ether (i : i), the solution being passed through a filter, to arrest any solid matter, into an acetylation flask. The alcohol-ether is distilled off and the impure glycerol is boiled with about 5 c. C. Of acetic anhydride and about I grm. Of anhydrous sodium acetate for ij to 2 hours.
An acetylation flask is simply a round-bottomed flask fitted with a ground-in glass air condenser.
Anhydrous sodium acetate is prepared by gently heating the crystalline salt... until it just fuses without blackening.
Allow the acetylated product to cool, add carbon dioxide free water and warm, not boil ; when solution is complete filter into a 1500 c. C. Flask. The acetic acid in the filtrate is exactly neutralised with 2% sodium hydroxide solution ; then a known quantity of 10% sodium hydroxide solution of known strength is added, and the solution is boiled gently under a reflux condenser for half an hour to hydrolyse the triacetin. Triacetin being volatile in steam it is essential that complete 66 LUBRICATING AND ALLIED OILS condensation of the steam is effected.
What to read after Lubricating And Allied Oils a Handbook for Chemists Engineers And Students?
You can find similar books in the "Read Also" column, or choose other free books by Elliott a Elliott Alfred Evans to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The dry mass is extracted with alcohol-ether (i : i), the solution being passed through a filter, to arrest any solid matter, into an acetylation flask. The alcohol-ether is distilled off and the impure glycerol is boiled with about 5 c. C. Of acetic anhydride and about I grm. Of anhydrous sodium acetate for ij to 2 hours.
An acetylation flask is simply a round-bottomed flask fitted with a ground-in glass air condenser.
Anhydrous sodium acetate is prepared by gently heating the crystalline salt... until it just fuses without blackening.
Allow the acetylated product to cool, add carbon dioxide free water and warm, not boil ; when solution is complete filter into a 1500 c. C. Flask. The acetic acid in the filtrate is exactly neutralised with 2% sodium hydroxide solution ; then a known quantity of 10% sodium hydroxide solution of known strength is added, and the solution is boiled gently under a reflux condenser for half an hour to hydrolyse the triacetin. Triacetin being volatile in steam it is essential that complete 66 LUBRICATING AND ALLIED OILS condensation of the steam is effected.
What to read after Lubricating And Allied Oils a Handbook for Chemists Engineers And Students?
You can find similar books in the "Read Also" column, or choose other free books by Elliott a Elliott Alfred Evans to read onlineMoreLess
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