Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/5878653 |
| 报告编号 | LBL-15869 |
| 来源ID | OSTI_ID: 5878653 |
| Identification and separation of the organic compounds in coal-gasification condensate waters. [5,5 dimethyl hydantoin, dihydroxy benzenes, acetonitrile] | |
| Mohr, D.H. Jr.; King, C.J. | |
| 英文摘要 | A substantial fraction of the organic solutes in condensate waters from low-temperature coal-gasification processes are not identified by commonly employed analytical techniques, have low distriution coefficients (K/sub C/) into diisopropyl ether (DIPE) or methyl isobutyl ketone (MIBK), and are resistant to biological oxidation. These compounds represent an important wastewater-treatment problem. Analytical techniques were developed to detect these polar compounds, and the liquid-liquid phase equilibria were measured with several solvents. A high-performance liquid - chromatography (HPLC) technique was employed to analyze four condensate-water samples from a slagging fixed-bed gasifier. A novel sample-preparation technique, consisting of an azeotropic distillation with isopropanol, allowed identification of compounds in the HPLC eluant by combined gas chromatography and mass spectrometry. 5,5-dimethyl hydantoin and related compounds were identified in condensate waters for the first time, and they account for 1 to 6% of the chemical oxygen demand (COD). Dimethyl hydatoin has a K/sub D/ of 2.6 into tributyl phosphate (TBP) and much lower K/sub D/ values into six other solvents. It is also resistant to biological oxidation. Phenols (59 to 76% of the COD), dihydroxy benzenes (0.02 to 9.5% of the COD), and methanol, acetonitrile, and acetone (15% of the COD in one sample) were also detected. Extraction with MIBK removed about 90% of the COD. MIBK has much higher K/sub D/ values than DIPE for dihydroxy benzenes. Chemical reactions occurred during storage of condensate-water samples. The reaction products had low K/sub D/ values into MIBK. About 10% of the COD had a K/sub D/ of nearly zero into MIBK. These compounds were not extracted by MIBK over a wide range of pH. 73 references, 6 figures, 35 tables. |
| 出版年 | 1983 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 01 COAL, LIGNITE, AND PEAT ; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ; ACETONE ; GAS CHROMATOGRAPHY ; LIQUID COLUMN CHROMATOGRAPHY ; MASS SPECTROSCOPY ; COAL GASIFICATION PLANTS ; WASTE WATER ; CONDENSATES ; CHEMICAL ANALYSIS ; METHANOL ; PHENOL ; POLAR COMPOUNDS ; CHEMICAL OXYGEN DEMAND ; ETHERS ; EXPERIMENTAL DATA ; KETONES ; SAMPLE PREPARATION ; SOLVENT EXTRACTION ; TBP ; TOPO ; ALCOHOLS ; AROMATICS ; BUTYL PHOSPHATES ; CHROMATOGRAPHY ; DATA ; ESTERS ; EXTRACTION ; HYDROGEN COMPOUNDS ; HYDROXY COMPOUNDS ; INDUSTRIAL PLANTS ; INFORMATION ; LIQUID WASTES ; NUMERICAL DATA ; ORGANIC COMPOUNDS ; ORGANIC OXYGEN COMPOUNDS ; ORGANIC PHOSPHORUS COMPOUNDS ; OXYGEN COMPOUNDS ; PHENOLS ; PHOSPHORIC ACID ESTERS ; SEPARATION PROCESSES ; SPECTROSCOPY ; WASTES ; WATER 010600* -- Coal, Lignite, & Peat-- Properties & Composition ; 010404 -- Coal, Lignite, & Peat-- Gasification ; 400105 -- Separation Procedures ; 400104 -- Spectral Procedures-- (-1987) |
| URL | http://www.osti.gov/scitech/servlets/purl/5878653 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/263503 |
| 推荐引用方式 GB/T 7714 | Mohr, D.H. Jr.,King, C.J.. Identification and separation of the organic compounds in coal-gasification condensate waters. [5,5 dimethyl hydantoin, dihydroxy benzenes, acetonitrile],1983. |
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