Method for extracting and refining long-chain dicarboxylic acid crude product
A long-chain dibasic acid and crude product technology is applied in the field of extracting and refining long-chain dibasic acid crude products, and can solve the problems of many separation steps, toxicity, flammability of organic solvents, etc., and achieves simple purification process, shortened process flow, The effect of high purification yield
Inactive Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 29 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The disadvantage of the former is that the organic solvent is flammable, volatile, and toxic, and fireproof, explosion-proof, and poison-proof devices must be installed during post-treatment. Organic solvents are more expensive than water, volatile and easy to lose, and the cost is high. The advantage is that the crystal form is good and the crystal particles are large. , easy to separate; the disadvantage of the water treatment method is that the solubility of the dibasic acid in water is small, and the crystal shape and crystal particles are not as good as before.
Although several purification methods have been developed in domestic laboratories, the actual separation steps after industrial application reach 8 to 10 steps, and the economy is poor
In addition, in the existing process, the separation of pigments mostly adopts the method of multiple adsorption of activated carbon, which has defects such as many separation steps, high labor intensity, poor production environment, and difficult recovery of organic solvents in industrial applications.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0023] The following experiments can prove the obvious technical effect of the present invention:
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More
Abstract
The invention relates to a method for extracting and refining a long-chain dicarboxylic acid crude product. The method comprises the following steps that: the filtrate and an extracting agent are mixed and heated, and an acid is added to carry out acidifying; a liquid-liquid separation treatment is performed after the extracting agent and the filtrate are subjected to complete mixing and standing under a certain pH value and a certain temperature; the extraction phase is cooled and crystallized; the solvent is removed, and a drying treatment is performed to obtain the purified product. According to the present invention, the adsorbent is not used, such that the process for separation of the adsorbent and the fermentation liquid is saved so as to substantially reduce the purification process; the method has characteristics of simple purification process, high purification yield, and easy control of the purification process.
Description
technical field [0001] The invention relates to a method for producing a long-chain dibasic acid product by a refined biological fermentation method in the field of petrochemical industry. The long-chain dibasic acid product produced by the biological fermentation method is purified by an extraction process. Background technique [0002] Long-chain dodecanedibasic acid is a fine chemical product with important and extensive industrial uses. It is mainly used in the synthesis of advanced engineering plastics nylon, nylon, high-grade nylon hot-melt adhesives for clothing, and advanced coatings. Dodecanedioic acid does not exist alone in nature, and it is difficult to synthesize it in the chemical industry. The United States, Germany, Russia, Japan and other countries have conducted long-term research on the chemical synthesis of dodecanedibasic acid, but so far, the chemical synthesis route is to use butadiene as a raw material for chemical synthesis, but it is both High-temp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More
IPC IPC(8): C07C55/21C07C51/48
Inventor 朱伟刘建新陈韶辉杨爱武缪军李丹杜鹃
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com