SU1167179A1 - Method of extracting sulfoxides from aqueous solutions - Google Patents

Abstract

A method of extracting petroleum sulfoxides from aqueous solutions by extraction with organic matter. solvent, characterized in that, in order to reduce the energy costs of the process, the extraction is carried out with diesel fuel or kerosene, or gasoline, or hexane with a volume ratio of the aqueous phase and extractant equal to

Description

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This invention relates to a process for separating petroleum sulfoxides from aqueous solutions which can be used as an effective extractant for the recovery of a large number of elements.

The aim of the invention is to reduce the energy costs of the process.

The invention is illustrated by the following examples.

Example 1. 1200 ml of an aqueous solution after extraction of niobium neutralized with ammonia to a pH of 6.4 and containing, g / l: petroleum sulfoxides (HCO) 9.8, (NH) j S04 240; 38, mixed with 200 ml of kerosene for 5 minutes. The aqueous solution contains 11.76 g HCO. After extraction with kerosene, 200 ml of the organic phase is obtained, where the HCO is 36.0 g / l or 7.2 g. The HCO extraction at the extraction stage with kerosene in one step is 61.2%. The organic solution (200 ml) is mixed with 100 ml of an aqueous solution containing, g / l: 250, HF 80, 42.6 for 5 minutes. After extraction, 7.5 ml of a heavy organic phase with an HCO concentration of 840 g / l and 192 ml of a light organic phase with a HCO concentration of 7.9 g are obtained. Extracting the HCO from kerosene to the heavy organic phase is 6.7 g or 87.5 %, and in percent of the original aqueous solution of 53.6%. The 7.5 np tertiary organic phase is mixed with 15 ml of an aqueous solution (200 g / l) and 7.2 ml of HCO (852 g / l) are isolated. The yield in the regenerated product is 6.1 g or 96.8%, and in percent of the initial aqueous solution is 51.9%.

Example 2. Under the conditions of Example 1, 1000 ml of an aqueous solution are mixed with 200 ml of diesel fuel. The aqueous solution contains 9.8 g HCO. After extraction with diesel fuel, 200 ml of the organic phase was obtained, where HCOJ is 25.7 g / l or 5.14 g. Extraction of HCO at the stage of extraction with diesel fuel in one step is 52.5%. 200 ml of the organic solution is mixed with 100 ml of an aqueous solution containing, g / l: 100, HF 20, TajOij 5.1, for 5 minutes. After

extractions are obtained with 5 ml of a heavy organic phase with a HCO concentration of 827 g / l and 195 ml of a light organic phase with a HCO concentration of 6.1 g / l. Removing the HCO from diesel fuel to the heavy organic phase is 4.14 g or 80.5%, and as a percentage of the initial aqueous solution 42.2%. Mix 5 ml of the heavy organic phase with 10 ml of an aqueous solution (200 g 4.5 ml of HCO (844 g / l) are added. The yield in the regenerated product is 3.80 g or 91.8% and the percentage of the initial aqueous solution is 38.8%.

Example 3. Under the conditions of Example 1, 1000 ml of an aqueous solution are mixed with 200 ml of gasoline. The aqueous solution contains 9.8 g HCO. After extraction with gasoline, 200 ml of the organic phase is obtained, where the HCO is 31.6 g / l or 6.32 g. The HSO extraction at the gasoline extraction stage in one step is 64.5%. Further processing of the hydrocarbon solution was carried out under the conditions of Example 1. The yield in the regenerated product of 6.2 ml HCO (855 g / l) was 5.22 g or 53.3% of the initial aqueous solution.

Example 4. Under the conditions of Example 1, 800 ml of an aqueous solution are mixed with 200 ml of hexane. The aqueous solution contains 7.84 g of HCO. After extraction with hexane, 200 ml of the organic phase was obtained, where the HCO was 27.6 g / l or 5.52 g. The HCO extraction at the extraction stage with hexane in one step was 70.4%. Further processing of the hydrocarbon solution was carried out under the conditions of Example 2. The yield in the regenerated product of 4.6 ml HCO (836 g / l) was 3.85 g or 49.1% of the initial aqueous solution.

Etc. Measure 5. Under the conditions of Example 1, 1200 ml of an aqueous solution and 200 ml of kerosene are mixed. Extraction of NSO at the stage of extraction with kerosene for one step is equal to 61.2%. 200 ml of the organic solution is mixed with 20 ml of 95.5% Hj80 for 5 minutes. Removing the HCO from kerosene into the H.SOy solution is 91% or 6.55 g. After diluting the aqueous

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solution with water is 4 times and neutralizing sulfuric acid with ammonia, 5.8 ml of HCO (817 g / l) are separated. The yield to the regenerated product is 4.7 g or 40.3% of the initial aqueous solution.

Example 6. Under the conditions of Example 1, 200 ml of kerosene containing 36.0 g / l HCO is mixed with 80 ml of an aqueous solution containing, g / L HC 110, 55, for 5 minutes. After extraction, 7.1 ml of a heavy organic phase containing HCO 832 g / l are obtained. By neutralizing the organic phase with ammonia to pH 9, 5.9 ml are separated. HCO (850 g / l). The output of the HCO in the regenerated product is 5.02 g or 42.7% of the initial aqueous solution.

Example 7. Under the conditions of Example 1, 1000 ml of an aqueous solution are mixed with 100 ml of gasoline. The aqueous solution contains 9.8 g HCO. After extraction with gasoline, 100 ml of the organic phase are obtained, where the HCO is 45, 9 g / l or 4.59 g. Extraction

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The NSO at the gasoline extraction stage is 46.8% in one step. Further processing of the hydrocarbon layer is carried out under the conditions of Example 1. The yield in the regenerated product of 4.8 ml HCO (932 g / l) is 4.09 g or 41.7% of the content in the aqueous solution.

Example 8. Under the conditions of Example 1, 200 ml of kerysin containing 36.0 g / l HCO are mixed with 20 ml of an aqueous solution containing, g / l-t H, SO 300, HF 173, 102.2, for 5 min After extraction

15, 6.6 ml of a heavy organic phase with a HCO concentration of 830 g / L and 197 ml of a light organic phase with a HCO concentration of 8.0 g / l are obtained. The extraction of HCO from kerosene into the heavy organic phase is 5.48 g or 76.1%, and as a percentage of the initial aqueous solution 46.6%. 6.6 ml of the heavy organic phase are mixed with 15 ml of an aqueous solution of 220 g / l

25 and allocate 6.2 ml HCO (844 g / l) .. You-. the progress to the regenerated product is 5.23 g or 95j4%, and as a percentage of the initial aqueous solution is 44.5%.

Claims (1)

METHOD FOR EXTRACTION OF OIL SULFOXIDES FROM AQUEOUS SOLUTIONS by extraction using organo. solvent, characterized in that, in order to reduce the energy costs of the process, the extraction is carried out with diesel fuel or kerosene, or gasoline, or hexane with a volume ratio of the aqueous phase and extractant equal to (4-10): 1, the obtained organic phase containing sulfoxides, treated with an aqueous fluoride solution of tantalum or niobium or a chloride solution of iron, or with a solution of concentrated sulfuric acid with a volume ratio of reagents equal to (2-10): 1, sulfoxides with extracted metals are separated and whether acid from an organic solvent, followed by isolation of the target product by solid phase or liquid phase reextraction.