Title:
A SUPERCRITICAL CARBON DIOXIDE MORPHOLOGICALLY MODIFIED ACID-BASED HALLOYSITE CATALYST
Document Type and Number:
WIPO Patent Application WO/2018/186638
Kind Code:
A1
Abstract:
The efficient production of poly(tetramethylene ether) diacetate [PTMEA] or other diesters, from tetrahydrofuran [THF] is obtained utilizing an acid-based catalyst that is based on a morphologically reconfigured and Bronsted acidity enhanced halloysite derived from a preparation method of using naturally occurring halloysites. More specifically, the method relates to morphological modification of the internal pore structure of halloysites via supercritical carbon dioxide treatment directly applied onto the raw halloysite minerals, that yields highly synergistic and reproducible results of elimination of inaccessible and detrimental extra-small pores. PTMEA is readily converted to poly(tetramethylene ether) glycol (PTMEG) by a transesterification reaction.
Inventors:
KIM HYUNG JU (US)
LEE HWAN BOCK (KR)
LEE JUNG KEUN (KR)
LEE HWAN BOCK (KR)
LEE JUNG KEUN (KR)
Application Number:
PCT/KR2018/003861
Publication Date:
October 11, 2018
Filing Date:
April 02, 2018
Export Citation:
Assignee:
KOREA PTG CO LTD (KR)
International Classes:
B01J29/06; B01J37/00; B01J35/10; B01J37/08; C08G65/26
Foreign References:
| US6207793B1 | 2001-03-27 | |||
| US20130136849A1 | 2013-05-30 | |||
| US8030439B2 | 2011-10-04 | |||
| KR20090129971A | 2009-12-17 |
Other References:
KADI, SAMIR ET AL.: "Preparation, characterisation and application of thermally treated Algerian halloysite", MICROPOROUS AND MESOPOROUS MATERIALS, vol. 158, 14 March 2012 (2012-03-14), pages 47 - 54, XP055560045
Attorney, Agent or Firm:
FIRSTLAW P.C. (KR)
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