| 摘要 |
A petroleum extract containing at least 30% of aromatics is modified to form a solid water-insoluble material containing one or more of nitrogen, phosphorus, sulphur, and potassium for use as a slow release fertilizer or ion exchange soil-treating material. The extract may be treated with nitric, sulphuric, phosphoric, chloroformic, or chloroacetic acid; or chlorophenol. The acid-treated product may be washed with water or an alkaline solution. A salt of ammonium, potassium, iron, magnesium, copper, or zinc may be formed. A phosphorus-containing product may be produced by reacting a sulphonated product with phosphorus trichloride. A nitrated product may be reduced by means of Zn/HCl. |
