BENZINE
Benzine, To Color Green.
Purification Of Benzine.
Fatty acid from tallow, olive oil, or other fats may be used, but care should be taken that they have as slight an odor of rancid fat as possible. The so-called elaine or olein—more correctly oleic acid—of the candle factories may likewise be employed, but it should first be agitated with a 1/10-per-cent soda solution to get rid of the bad-smelling fatty acids, especially the butyric acid.
The Prevention Of The Inflammability Of Benzine.
Substitute for Benzine as a Cleansing Agent.—
| I.— | Chloroform | 75 parts |
|---|---|---|
| Ether | 75 parts | |
| Alcohol | 600 parts | |
| Decoction of quillaya bark | 22,500 parts | |
| Mix. | ||
| II.— | Acetic ether, technically pure | 10 parts |
| Amyl acetate | 10 parts | |
| Ammonia water | 10 parts | |
| Alcohol dilute | 70 parts | |
| Mix. | ||
| III.— | Acetone | 1 part |
| Ammonia water | 1 part | |
| Alcohol dilute | 1 part | |
| Mix. | ||
Deodorizing Benzine.—
| I.— | Benzine | 20 ounces |
|---|---|---|
| Oil of lavender | 1 fluidrachm | |
| Potassium dichromate | 1 ounce | |
| Sulphuric acid | 1 fluidounce | |
| Water | 20 fluidounces |
Dissolve the dichromate in the water, add the acid and, when the solution is cold, the benzine. Shake every hour during the day, allow to stand all night, decant the benzine, wash with a pint of water and again decant, then add the oil of lavender.
II.—First add to the benzine 1 to 2 per cent of oleic acid, which dissolves. Then about a quarter of 1 per cent of tannin is incorporated by shaking. A sufficient quantity of caustic potassa solution, or milk of lime, to combine with the acids is then well shaken into the mixture, and the whole allowed to stand. The benzine rises to the top of the watery fluid, sufficiently deodorized and decolorized for practical purposes.
III.—To 1,750 parts of water add 250 parts of sulphuric acid, and when it has cooled down add 30 parts of potassium permanganate and let dissolve. Add this solution to 4,500 parts of benzine, stir well together, and set aside for 24 hours. Now decant the benzine and to it add a solution of 7 1/2 parts of potassium permanganate and 15 parts of sodium hydrate in 1,000 parts of water, and agitate the substances well together. Let stand until the benzine separates, then draw off.
IV.—Dissolve 3 parts of litharge and 18 parts of sodium hydrate in 40 parts of water. Add this to 200–250 parts of benzine and agitate well together for two minutes, then let settle and draw off the benzine. Rinse the latter by agitating {107} it with plenty of clear water, let settle, draw off the benzine, and, if necessary, repeat the operation.
BENZINE, CLEANING WITH: See Cleaning Preparations and Methods, under Miscellaneous Methods.
BENZOIC ACID IN FOOD: See Food.
BENZOIN SOAP: See Soap.