Production of hydroxyacetonitrile (Raw material of indigo production)

Categories:
Categories:
Unit processes/Materials production/Organic chemicals
Location:
CQ-CN
Reference year: 2015 -
Description

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. 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.

Technology

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.

Process type
Unit
LCI modeling approach
Unknown
Multifunctional modeling
NONE
Format
ILCD
Aggregation type
HORIZONTAL
Data provider
TianGong
Review status
Internal
Cost
Free
Contact
Tiangong LCI Data Working Group