Preprocessing method of neopentyl glycol production wastewater
A technology for the production of wastewater and neopentyl glycol, which is applied in natural water treatment, water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems such as no economical and effective treatment methods
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0039] Example 1:
[0040] Take 100mL of 300mg / L simulated formaldehyde wastewater in an Erlenmeyer flask, add 0.28g of calcium oxide at a molar ratio of calcium oxide / formaldehyde of 5:1, and control the reaction temperature to 70°C under a vibration condition of 150r / min. The concentration of formaldehyde changes.
[0041] The current treatment effect is: under the condition of 70℃ and the reaction time is 60min, the formaldehyde removal rate is 99.8%, and the concentration of formaldehyde after treatment is 0.65mg / L, which is lower than the maximum allowable emission of formaldehyde as stipulated in the Pollutant Discharge Standard for Urban Sewage Treatment Plants Concentration limit.
Example Embodiment
[0042] Example 2:
[0043] Take 100mL of 500mg / L simulated formaldehyde wastewater in an Erlenmeyer flask, add 0.187g of calcium oxide at a molar ratio of calcium oxide / formaldehyde of 2:1, and control the reaction temperature to 70°C under a vibration condition of 150r / min. The concentration of formaldehyde changes with time.
[0044] The current treatment effect is: under the condition of 70℃, the removal rate of formaldehyde rapidly rises close to 90% near 40min. When the reaction time is 50min, the formaldehyde concentration is 0.73mg / L, and the pretreatment effect can be achieved in a short time.
Example Embodiment
[0045] Example 3:
[0046] Take 100mL of representative neopentyl glycol production wastewater (with a concentration of about 310mg / L of formaldehyde) in an Erlenmeyer flask, and control the reaction temperature to 70°C under the vibration condition of 150r / min. According to the molar ratio of calcium oxide / formaldehyde Add 0.158g of calcium oxide for 5:1, and measure the formaldehyde concentration, CODcr and SS after a reaction time of 60min.
[0047] The current treatment effect is: when the molar ratio of calcium oxide / formaldehyde is 5:1 at a reaction temperature of 70℃, the formaldehyde removal rate is close to 99.9% within 60 minutes, and the formaldehyde concentration after pretreatment is 0.37mg / L; CODcr is in the whole reaction There is no obvious change in the process. The pretreatment of neopentyl glycol by calcium oxide alkaline catalytic polymerization only changes the form of formaldehyde, and it is not completely removed. However, the neopentyl glycol production wast...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap