Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and device for continuously producing isosorbide

A technology of isosorbide and sorbitol, which is applied in the field of continuous production of isosorbide, can solve the problems of complicated process, high material consumption and high energy consumption, and achieve the effects of simplified separation process, low temperature and energy consumption, and good quality of finished products

Active Publication Date: 2014-08-13
长春鸿成生物化工材料技术开发有限公司
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are feasible and advanced, but the process is relatively complicated, and the material consumption and energy consumption are relatively high.

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
  • Method and device for continuously producing isosorbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In the 500mL reactor that is provided with stirrer, add the polyphosphoric acid of 180 grams solid sorbitol and 0.9 gram, each component of reaction device is according to figure 1 Connect as shown, and then evacuate. Maintain a vacuum degree of 200pa and heat at a temperature of 130°C. Under the action of polyphosphoric acid, the molten sorbitol reacts for 1 hour, then the oil bath is heated to 280°C, and the temperatures of the first condenser and the second condenser are controlled to be 60°C and -10°C, a total of 112.6 grams of product were collected in the product tank (yield: 78.0% of theoretical value), with a purity of 99.5%.

[0038]The resulting product had a melting point of 61-62°C.

[0039] HRMS-EI(m / e,%): 146.0578(M + ,5.14),86.0340(C 4 h 6 o 2 ,100),69.0325(C 4 h 5 O, 18.20), 58.0408 (C 3 h 6 O, 13.41), 44.0254 (C 2 h 4 O, 17.57).

[0040] The peak at 146.0578 is the molecular ion peak, and the peak at 86.0340 is the fragment ion generated aft...

Embodiment 2

[0044] In the 500mL reactor that is provided with agitator, add 100 grams of 70% sorbitol aqueous solution and 0.4 gram of polyphosphoric acid, each assembly of reaction device is according to figure 1 Connect as shown, and then evacuate. Maintain a vacuum degree of 300pa, heat at a temperature of 135°C, and proceed the reaction under the action of polyphosphoric acid until the reactor is anhydrous, then the oil bath is heated to 260°C, and the temperatures of the first condenser and the second condenser are controlled respectively At 52°C and -15°C, a total of 44.1 g of product (yield: 78.5% of theoretical value) was collected in the product tank with a purity of 99.6%.

[0045] The obtained product characterization result is similar to Example 1.

Embodiment 3

[0047] In the 500mL reactor that is provided with stirrer, add the polyphosphoric acid of 60 gram solid sorbitol and 0.3 gram, each component of reaction device is according to figure 1 Connect as shown, and then evacuate. Maintain a vacuum of 200pa and heat at a temperature of 130°C. Under the action of polyphosphoric acid, the molten sorbitol reacts for 1 hour, then the oil bath is heated to 240°C, and the temperatures of the first condenser and the second condenser are controlled to be 52°C and -15°C, after collecting 15 grams of product in the product tank, add 30 grams of sorbitol to the system through the raw material tank, continue the reaction under the same conditions, collect 30 grams of product, and then add 30 grams of sorbitol to the system The polyphosphoric acid of gram and 0.1 gram still reacts under the same conditions, and a total of 75.2 grams of products are collected (yield: 78.1% of theoretical value), with a purity of 99.5%.

[0048] The obtained produc...

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

PropertyMeasurementUnit
Melting pointaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for continuously producing isosorbide, which comprises the following steps: (1) feeding: mixing sorbitol and a catalyst in a reactor; (2) reaction: under reduced pressure, controlling the temperature in the reactor to sequentially initiate first dehydration reaction and second dehydration reaction of the sorbitol so as to generate the isosorbide, and meanwhile, enabling the isosorbide and water to form a gaseous mixture; and (3) condensation separation: controlling the condensation temperature of the condenser to sequentially condense the isosorbide and water in the gaseous mixture from the reactor, thereby obtaining the isosorbide. The invention also relates to a device for the method.In the sorbitol dehydration reaction process, the isosorbide and water are separated in time by distillation, thereby promoting the selective dehydration reaction, simplifying the separation technique and implementing purification of the isosorbide.

Description

technical field [0001] The invention relates to a method for continuous production of isosorbide and a device used therefor. Background technique [0002] Isosorbide, the secondary dehydration product of sorbitol, as a new type of bio-based material, is widely used in food, cosmetics, plastics, medicine and other polymerization fields. At present, a research hotspot in the application of isosorbide is to use it as a comonomer for the modification of polymers such as polyether, polyester, polyurethane, and polycarbonate, which can significantly improve the high temperature performance and impact resistance of the polymer. Isosorbide and terephthalic acid are used to polymerize polyester with similar properties to polyethylene terephthalate (PET), which can be used as a substitute for PET polyester, and it has good optical properties, thermal properties, and mechanical properties. properties and dyeability. Isosorbide has great potential in the modification of polymers and t...

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
no application Login to View More
IPC IPC(8): C07D493/04
CPCC07D493/04
Inventor 林英杰段海峰褚腊林
Owner 长春鸿成生物化工材料技术开发有限公司
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
PatSnap group products

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