Solvent naphtha
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| Surname |
Solvent naphtha (petroleum, coal); Solution benzene; Heavy benzene; Light oil redistillate |
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| CAS number |
64742-95-6, 64742-94-5, 64742-97-7, 64742-89-8, 64742-88-7 92062-15-2, 85536-17-0 (coal), 65996-79-4 ( Coal), 85539-19-2 (coal), 85536-20-5 (coal) |
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Solvent naphtha , also known as solvent benzene , heavy benzene or (English) aromatic naphtha , is the collective name for mixtures of light aromatic hydrocarbons obtained from coal tar , crude oil or oil shale . Solvent naphtha is a colorless liquid with a pungent odor under standard conditions.
The part of the name “Naphtha” refers primarily to the mean boiling point , not to the chemical composition of the mixture. In naphtha in the strict sense is a predominantly paraffinic ( aliphatic ) fraction of crude oil distillation while Solvent Naphtha is traditionally distilled from coal tar and contains mostly aromatic components, as indicated by the designations solvent benzene , heavy benzene and Aromatic Naphtha is expressed. In the meantime, however, solvent naphtha is also produced from products of petroleum distillation through catalytic reforming .
composition
| Solvent naphtha according to DIN standard 51633 | |||
| composition | light | heavy | |
| Hazen color number | 20th | 40 | |
| Boiling range | low boiling 150-195 ° C |
high boiling 170-220 ° C |
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| Flash point | ≥35 ° C | > 55 ° C | |
| Physical state | liquid | ||
Solvent naphtha from petroleum distillation consists mainly of C 9 to C 13 aromatics ( C3-benzenes , toluene , xylene ), which are also synthetically produced from isoparaffins, as well as naphthalene
Coal naphtha solvent consisting predominantly of C 7 - to C 10 - aromatic compounds such as naphthalenes, indene , phenolic , C3-benzenes , toluene , xylene , benzofuran with admixtures of cycloalkanes and other paraffinic hydrocarbons.
According to DIN standard 51633 (1986-11) “Solvent Naphtha light” - C 9 may contain a maximum of 1% ethylbenzene , 10% xylenes and 15% each of propylbenzene or mesitylene . "Heavy solvent naphtha" - C 10 must contain less than 1% xylenes, propylbenzene and mesitylene.
Depending on the boiling point and flash point, a distinction is made between low, medium and high boiling solvent naphtha, which also have different CAS numbers .
use
Solvent Naphtha, widely known under the trade name "Solvesso", is an inexpensive, organic solvent and is used as such for natural and synthetic resins (including alkyd resins and epoxy resin esters ), for printing inks in the textile and paper industry , as a thinner for paints, varnishes and lacquers (also coating raw materials, such as paint curing agents), as well as in the manufacture of herbicides and insecticides .
Individual evidence
- ↑ Petros C. Mavroidis, N. David Palmeter (Ed.): Regulated Chemicals Directory 1995. Van Nostrand Reinhold, 1995, ISBN 0-442-02124-0 , p. 500.
- ↑ The CLP regulation. Consolidated version including 8th ATP (draft). ecomed, Heidelberg et al. 2015, ISBN 978-3-609-65045-6 , pp. 618, 619.
- ↑ a b Entry on naphtha, low boiling point in the GESTIS substance database of the IFA , accessed on August 27, 2016(JavaScript required) .
- ↑ Entry on Solvent naphtha (petroleum), light arom. In the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
- ↑ a b Entry on Solvent Naphtha. In: Römpp Online . Georg Thieme Verlag, accessed on March 16, 2014.
- ^ Salvatore J. Rand: Significance of Tests for Petroleum Products. 7th edition. ASTM International, 2003, ISBN 0-8031-2097-4 , p. 220.