A kind of preparation method of high carboxyl content oxidized starch
A technology of oxidizing starch and high carboxyl group, which is applied in the direction of chemical recovery, etc., can solve the problems that cannot be used to change the process, reduce the molecular weight of starch, and narrow the use, and achieve the effect of increasing the oxidation performance of oxidants, high carboxyl content and low carbonyl content
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0036] Green method to prepare oxidized starch:
[0037] Step 1: Use water as a solvent, turn on the stirring, m (starch): m (water) = 1:2, slowly add starch to water, and keep the temperature at 35°C.
[0038] The second step: add a composite oxidation catalyst with 1.5% starch mass.
[0039] Components in the composite oxidation catalyst include TS-1 molecular sieve and phosphomolybdic acid, wherein the silicon-titanium ratio of the TS-1 molecular sieve is 30; the preparation method of the composite oxidation catalyst is to add TS-1 molecular sieve to 20% phosphomolybdic acid aqueous solution, m (20% phosphomolybdic acid aqueous solution): m (TS-1 molecular sieve) = 4:1, keep the temperature at 50°C, stir for 5 hours, vacuum dry at 150°C for 4h, and then burn in a muffle furnace at 280°C for one hour. Burn at 360°C for two hours and turn over every fifteen minutes to obtain a composite oxidation catalyst;
[0040] Step 3: Add 5% sodium hydroxide solution dropwise to keep t...
Embodiment 2
[0046] Green method to prepare oxidized starch:
[0047] Step 1: Use water as a solvent, turn on the stirring, m (starch): m (water) = 1:1, slowly add starch to water, and keep the temperature at 30°C.
[0048] The second step: add a composite catalyst with 3% starch mass.
[0049] Components in the composite oxidation catalyst include TS-1 molecular sieve and phosphomolybdic acid, wherein the silicon-titanium ratio of the TS-1 molecular sieve is 80; (20% phosphomolybdic acid aqueous solution): m (TS-1 molecular sieve) = 8:1, keep the temperature at 50°C, stir for 5 hours, vacuum dry at 150°C for 4h, and then burn in a muffle furnace at 280°C for one hour. Burn at 380°C for two hours and turn over every fifteen minutes to obtain a composite oxidation catalyst.
[0050] Step 3: Add 5% sodium hydroxide solution dropwise to keep the pH in the range of 8 to 9, pass ozone gas into the starch suspension, and adopt the method of aerating at intervals of 1 hour and stopping for 15 m...
Embodiment 3
[0056] Green method to prepare oxidized starch:
[0057] Step 1: Use water as a solvent, turn on the stirring, m (starch): m (water) = 1: 3, slowly add starch to water, and keep the temperature at 20°C.
[0058] The second step: add a composite catalyst with 5% starch mass.
[0059] Components in the composite oxidation catalyst include TS-1 molecular sieve and phosphomolybdic acid, wherein the silicon-titanium ratio of the TS-1 molecular sieve is 50; the preparation method of the composite oxidation catalyst is to add TS-1 molecular sieve to 20% phosphomolybdic acid aqueous solution, m (20% phosphomolybdic acid aqueous solution): m (TS-1 molecular sieve) = 6:1, keep the temperature at 50°C, stir for 5 hours, vacuum dry at 150°C for 4h, and then burn in a muffle furnace at 280°C for one hour. Burn at 380°C for two hours and turn over every fifteen minutes to obtain a composite oxidation catalyst.
[0060] Step 3: Add 5% sodium hydroxide solution dropwise to keep the pH withi...
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, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com