Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A mixture and resource-based technology, applied in the field of purification technology, can solve problems such as difficult processing and similar component structures, and achieve the effects of improving economic benefits, reducing environmental pollution, improving quality and reducing consumption.
Active Publication Date: 2018-09-21
JIANGSU HUANXIN NEW MATERIAL CO LTD
View PDF7 Cites 8 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Polyphenol mixtures are generally used as light components in existing treatment processes because their components have close boiling points and are still present in light components, but it is generally difficult to process them due to their similar component structures and similar boiling points
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] Definition of polyphenol mixture: The components of the catalytic cracking products of isophorone under the vacuum condition of -0.1Mpa, and the temperature at the top of the distillation column is lower than 45°C are collectively referred to as light components, and these light components are naturally cooled Afterwards, some substances will crystallize out, and this part of substances precipitated in the form of crystals is collectively referred to as a polyphenol mixture. From the perspective of material composition, its composition includes: 25% m-cresol, 40% 2,4-dimethylphenol, 25% 3,5-dimethylphenol and 10% impurities, impurities include 2, 5-Dimethylphenol and 3,4-Dimethylphenol and various other components. In the process of catalytic cracking of isophorone, in addition to the main substance 3,5-dimethylphenol, various by-products will be produced, such as 2,3-dimethylphenol, 2,4-dimethylphenol, 2 , 5-dimethylphenol, 2,6-dimethylphenol, m-cresol, toluene, trime...
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
Property
Measurement
Unit
melting point
aaaaa
aaaaa
boiling point
aaaaa
aaaaa
Login to view more
Abstract
The invention provides a polyphenol mixture recycling purification technology which comprises the steps of alkalization and phase splitting: heating a polyphenol mixture to react with a sodium carbonate solution to general phenol sodium salt, conveying reaction liquid into an alkalization and phase splitting tower for continuous reaction to generate the phenol sodium salt and phase splitting and obtaining a water phase rich in the phenol sodium salt and an organic light component, acidification, water washing and phenol extraction: conveying the water phase into an acidification tower for acidification, allowing an organic phase on the upper layer in the acidification tower to overflow into a water washing tower for washing treatment, ethanol crystallization mixing and adding the organic phase after the water washing and ethanol into a crystallizer for crystallization to form 2,3-dimethyl phenol, and rectification and separation: continuously conveying primary mother liquid into a primary rectification tower for rectification till a metacresol finished product with a content greater than 98% is generated continuously in the primary rectification tower, and conveying kettle liquid with a 3,5-dimethyl phenol content greater than 80% from the primary rectifying tower into a secondary rectification tower for continuous rectification and purification to form a product with the 3,5-dimethyl phenol content greater than 98%.
Description
technical field [0001] The invention belongs to a purification process, and more specifically relates to a polyphenol mixture resource purification process. Background technique [0002] 2,3-Dimethylphenol is a white crystal. Molecular formula is C 8 h 10 O, molecular weight 122.17, melting point 75°C, boiling point 218°C, density 1.014, CAS 526-75-0, soluble in water, alcohol and ether. 2,3-Dimethylphenol is mainly used in the manufacture of phenolic resins, plasticizers, dyes, flotation agents, insecticides, fungicides, mold adhesives, wood preservatives, antioxidants, lubricating oil additives, etc. [0003] m-cresol is a colorless or pale yellow liquid with the molecular formula C 7 h 8 O, molecular weight 108, melting point 8-11°C, boiling point 203°C, CAS 108-39-4, slightly soluble in water, soluble in ethanol, ether, and sodium hydroxide solution. m-cresol is mainly used as a pesticide intermediate to produce insecticides fenitrothion, fenthion, medicarb, permet...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more