Patent · US Active

Binderless zeolitic adsorbents

US11033879B2 · kind B2 · utility

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5References
7Claims
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Key dates

Filing dateJun 4, 2018
Grant dateJun 15, 2021
Priority date—
Expiry dateMay 26, 2039

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C7/13
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

FAU type binderless zeolitic adsorbents and methods for making the FAU type binderless adsorbents are described. The binderless zeolitic adsorbent comprises a first FAU type zeolite having a silica to alumina molar ratio below 3.0; a binder-converted FAU type zeolite having a silica to alumina molar ratio of from about 2.5 to about 6.0, wherein the binder-converted FAU type zeolite may be 5-50% of the binderless zeolitic adsorbent; and cationic exchangeable sites within the binderless zeolitic adsorbent. The FAU type binderless adsorbents may be used for xylene separation and purification in selective adsorptive separation processes using binderless zeolitic adsorbents.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.