Process information
| Key Data Set Information | |
| Location | CQ-CN |
| Geographical representativeness description | This research relies on the existing production capacity of 6,000 tons/year of indigo in Taifeng Taixing Chemical Company, a leading enterprise in Chongqing chemical industry, to carry out technological innovation and process optimization of the cleaner production process of the project, and achieve the self-production of hydroxy-acetonitrile, an important raw material |
| Reference year | 2015 |
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| Use advice for data set | When utilizing this dataset for Life Cycle Assessment (LCA), consider the specific context of hydroxyacetonitrile application in indigo dye production. Account for the process durations (7200 hours annually), the advances in clean production technology, and the material balance concerning the incorporation of recycling and environmental impact mitigation. Users should model the use phase in commercial indigo synthesis and assess energy consumption and emissions based on the technological upgrades and optimizations. This data should not be used for LCA without considering the limitations of the boundary of this research. Note that partial production data is available for extraction and use. |
| Technical purpose of product or process | Hydroxyacetonitrile is a precursor in the synthesis of indigo dye, essential in the textile industry. This chemical's production is a significant step in the clean manufacturing process developed by Taifeng Taixing Chemical Company. The company has optimized the technology to produce hydroxyacetonitrile, integral to the indigo production capacity of 6,000 tons/year. The compound is generated through a reaction between formaldehyde and crude hydrocyanic acid, subsequently contributing to a cleaner production pathway for indigo through further chemical synthesis steps. |
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| General comment on data set | Hydroxyacetonitrile is a precursor in the synthesis of indigo dye, essential in the textile industry. This chemical's production is a significant step in the clean manufacturing process developed by Taifeng Taixing Chemical Company. The company has optimized the technology to produce hydroxyacetonitrile, integral to the indigo production capacity of 6,000 tons/year. The compound is generated through a reaction between formaldehyde and crude hydrocyanic acid, subsequently contributing to a cleaner production pathway for indigo through further chemical synthesis steps. |
| Copyright | No |
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| Quantitative reference | |
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| Functional Unit | the production of 1 ton glycolonitrile |
| Time representativeness | |
| Time representativeness description | Publication date |
| Technological representativeness | |
| Technology description including background system | The study was based on the existing 6,000 tons/year indigo production plant of Chongqing Taifeng Taixing Chemical Company, and deeply explored the clean production technology of glycolonitrile, the raw meterial of indigo production. Glycolonitrile was generated by adding formaldehyde to raw material crude hydrocyanic acid gas, and then synthesized with aniline into n-phenylglycinenitrile. Furthermore, reacting with alkali to produce N-phenylglycine potassium, and finally synthesizing indigo products. |
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| Mathematical model | |
| Model description | Unit operating time is calculated on a yearly basis of 300 days (i.e. 7200 hours) |
Modelling and validation
Administrative information
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