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

Process for purifying 2-phenyl-3, 3 -bis(4-hydroxyphenyl) phthalimidine (PPPBP)

A technology of pyrrolidone and phenyl, which is applied in the field of purifying 2-phenyl-3, and can solve the problems of product loss and high cost of PAC

Active Publication Date: 2010-03-24
SHPP GLOBAL TECH BV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because PAC is difficult to regenerate, it is often discarded after a single use, thus also losing the absorbed product
Also, the cost of discarded PAC is high due to the need for a specific level of PAC

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
  • Process for purifying 2-phenyl-3, 3 -bis(4-hydroxyphenyl) phthalimidine (PPPBP)
  • Process for purifying 2-phenyl-3, 3 -bis(4-hydroxyphenyl) phthalimidine (PPPBP)
  • Process for purifying 2-phenyl-3, 3 -bis(4-hydroxyphenyl) phthalimidine (PPPBP)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Activated carbon fibers obtained from two different vendors, Anshan and Sutong, were pretreated as described above. Prepare 4 flasks; each flask contains approximately 2.0 grams of ACF. Two flasks contained ACF from Anshan and two flasks contained ACF from Sutong.

[0059] 200.0 mL of the pre-purification solution was placed in each flask. The flask was then shaken for 2 hours. Two flasks (each from a different vendor) were shaken at 20°C and the other two at 70°C. The solution was then analyzed by HPLC to measure the concentration change of aminophenone. Aminophenone had an initial peak area of ​​175,537. The results are shown in Table 1.

[0060] Table 1.

[0061]

sample

seller

temperature

The purified peak

area

Removal ratio (%)

1

Anshan

20℃

170,989

2.59

2

Anshan

70℃

169,914

3.20

3

Sutong

20℃

147,772

...

Embodiment 2

[0068] Activated carbon fibers from Sutong were pretreated as described above. Prepare three flasks; each flask contains 2.0 grams of ACF. 200.0 mL of the pre-purification solution was placed in each flask. The flasks were then shaken for 1, 2, and 3 hours, respectively. Each solution was then analyzed by HPLC to measure the change in concentration of aminophenone. The initial peak area for aminophenone was 32,770. The results are shown in Table 3.

[0069] table 3.

[0070] sample

[0071] Because ACF has a high adsorption rate, additional contact does not increase the removal ratio. Under the static adsorption regime shown here, a two hour exposure time was sufficient to remove most of the aminophenone impurity.

Embodiment 3

[0073] Activated carbon fibers from Sutong were pretreated as described above. Prepare 1 flask; it contains 2.0 grams of ACF. 200.0 mL of the pre-purification solution was placed in the flask, and the flask was shaken at 70°C for 2 hours. The solution was then analyzed by HPLC to measure the concentration changes of p,p-PPPBP, aminophenone and phenolphthalein (PP). The results are shown in Table 4.

[0074] Table 4.

[0075] component

[0076] This data indicates that ACF has excellent selective adsorption of aminobenzophenone compared to p,p-PPPBP and PP. ACF also removes p,p-PPPBP in a smaller proportion than PAC (7-8%), so that less of the desired product is lost during purification.

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

No PUM Login to View More

Abstract

A method for decoloring 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine (''p,p- PPPBP'') is disclosed. The method comprises contacting a liquid solution containing p,p-PPPBP and the common impurities o,p-PPPBP and aminophenone with activated carbon fibers. The activated carbon fibers adsorb the impurities, resulting in a purified solution of p,p-PPPBP. The activated carbon fibers can then be regenerated, such as with a methanol solution having a highly basic pH.

Description

Background technique [0001] In various embodiments, the present disclosure relates to methods of purifying 2-phenyl-3,3-bis(4-hydroxyphenyl)benzo[c]pyrrolone. [0002] Phenolphthalein has been used as an aromatic dihydroxy compound to synthesize monomers used to make polycarbonates that typically have the following properties: good clarity, good ductility, and high glass transition temperature. Certain derivatives of phenolphthalein have also been used as aromatic dihydroxy compounds to synthesize monomers for the preparation of polycarbonate resins as well as polyarylate resins. Specifically, 2-phenyl-3,3-bis(hydroxyphenyl)benzo[c]pyrrolidone ("PPPBP") is used as a monomer for polycarbonate resins. [0003] P,p-PPPBP ("p,p-PPPBP") can be prepared by refluxing phenolphthalein and aniline hydrochloride in aniline for 6 hours, followed by recrystallization from ethanol. The chemical structure of p,p-PPPBP is formula (I): [0004] [0005] Formula (I) [0006] Obviously, 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): C07D209/46
CPCC07D209/46
Inventor 孙彤修国华许忠琪杨敬武
Owner SHPP GLOBAL TECH BV
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