Low-ammonia-consumption caprolactam production process
A production process, a technology of caprolactam, applied to the preparation of lactam, calcium/strontium/barium sulfate, organic chemistry and other directions, can solve the problems of difficult industrial implementation, few recycling and replacement, complicated processes, etc. Economic benefits and the effect of reducing ammonia consumption
Active Publication Date: 2019-02-01
ZHEJIANG UNIV
9 Cites 1 Cited by
AI-Extracted Technical Summary
Problems solved by technology
View more
Method used
View more
Abstract
The invention discloses a low-ammonia-consumption caprolactam production process. Firstly, a saturated ammonium sulfate aqueous solution which is a byproduct in a caprolactam production process is mixed with a lime milk solution, and a reaction is carried out to generate an ammonia-enriched gas phase and calcium sulfate precipitate-enriched water slurry; steam stripping deamination treatment is carried out on the calcium sulfate precipitate-enriched water slurry generated by the reaction, then ammonia-containing steam obtained by steam stripping is sent to an ammonia recovery step, and the deammoniated slurry is sent to a gypsum recovery step; high-concentration ammonia water and ammonia gas are recovered from the ammonia-containing steam obtained by the steam stripping deamination and theammonia-containing gas phase generated by the reaction through a rectification and condensation method, and the recovered ammonia is sent back to the caprolactam production process to be used as neutralization ammonia; and finally a high-quality gypsum product is recovered from the calcium sulfate precipitate-containing slurry subjected to the steam stripping deamination. Through the adoption ofthe technical scheme, an outlet problem of the ammonium sulfate byproduct can be solved, meanwhile, ammonia consumption in the caprolactam production process can be greatly reduced, and economic benefits of a caprolactam device can be improved.
Application Domain
Lactams preparationCalcium/strontium/barium sulfates
Technology Topic
Ammonium sulfateChemistry +12
Image
Examples
- Experimental program(6)
Example Embodiment
Example Embodiment
Example Embodiment
PUM
Property | Measurement | Unit |
The average particle size | 29.1 | µm |
Description & Claims & Application Information
We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Similar technology patents
Ferment humic acid organic selenium fertilizer and preparation method thereof
Owner:SUZHOU KEDA WEILONG INFORMATION TECH
Method for extracting aluminum oxide and white carbon black from bituminous shale waste slag
Owner:FUSHUN MINING IND GROUP
Equipment for integrally treating oil-water separation of kitchen garbage
Owner:BIOLAND ENVIRONMENTAL TECH GRP CORP
Classification and recommendation of technical efficacy words
- Improve economic efficiency
Fracturing fluid for controlling extension of fracture and fracturing method
Owner:PETROCHINA CO LTD +1
Photovoltaic energy storage electric automobile charging station system and method for switching state of energy storage system
Owner:SHENZHEN POWER SUPPLY BUREAU +1
Producing technique of films for aluminized anti-fake wrapping paper
Owner:ZHEJIANG YAXIN PAPER IND