Technology for preparing itaconic acid-propenoic acid copolymer from fermented liquid
A technology of acrylic acid copolymer and itaconic acid, which is applied in the field of preparing itaconic acid-acrylic acid copolymer, can solve the problems of poor polymerization effect, large pollution, and small molecular weight of the polymer, and achieve good polymerization effect and low carboxylic acid group content. High and cost-reducing effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
example 1
[0013] Example 1: Pass a certain amount of itaconic acid fermentation broth through a cation exchange column, and then concentrate it under negative pressure to a solid content of 35% itaconic acid solution. Get this solution 300mL and add it to a 500mL four-necked round-bottomed flask. Take sulfuric acid 0.1 g of ferrous iron was added therein for dissolution, and nitrogen gas was passed into it. Dissolve 4g of sodium persulfate and 4g of sodium sulfite in 50mL of water respectively, and add them into the flask at the same time as 70g of acrylic acid at 90°C. The addition is completed within 3 hours, and then stirred for 1 hour. Cooling yielded 392 mL of deep red polymer solution.
[0014] The conversion rate of the obtained polymer solution was 97.8% (based on itaconic acid), and the unpolymerized residual itaconic acid monomer was 2.2%. The obtained polymer has a density of 1.21 g / mL (25°C), a solid content of 42.3%, and a number average molecular weight of 900.
[0015] ...
example 2
[0017] Example 2: Pass a certain amount of itaconic acid fermentation broth through a cation exchange column, then concentrate it under negative pressure to a solid content of 39% itaconic acid solution, take 300mL of this solution and add it to a 500mL four-necked round bottom flask, and pass through into nitrogen. Dissolve 4g of sodium persulfate and 6g of sodium sulfite in 50mL of water respectively, add them into the flask at the same time as 80g of acrylic acid at 70°C, finish the addition within 2 hours, and then stir for 1 hour. Cooling gave 405 mL of light yellow polymer solution.
[0018] The conversion rate of the obtained polymer solution was 99.7% (based on itaconic acid), and the unpolymerized residual itaconic acid monomer was 0.3%. The obtained polymer has a density of 1.19 g / mL (25°C), a solid content of 41.6%, and a number average molecular weight of 2000.
[0019] The test of the chelation value of the obtained polymer: take a certain amount of polymer, the...
PUM
Property | Measurement | Unit |
---|---|---|
transmittivity | aaaaa | aaaaa |
transmittivity | aaaaa | aaaaa |
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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com