close

˸

free_board_view
제목 GAS SEPARATION METHOD USING DDR TYPE ZEOLITES WITH STABILIZED ADSORPTION ACTIVITY
작성자 KCRC 등록일 2018-08-06 조회수 69

GAS SEPARATION METHOD USING DDR TYPE ZEOLITES WITH STABILIZED ADSORPTION ACTIVITY

문헌번호

EP 2928578 B1 (2018.07.25)

출원번호

2013-793042 (2013.11.08)

출원인

ExxonMobil Research and Engineering Company

발명자

RAVIKOVITCH, Peter, I. | CARSTENSEN, Barbara | PAUR, Charanjit, S. | JOHNSON, Ivy, D. | DECKMAN, Harry, W.

Current IPC(Main)

B01D-053/02

 

 

우선권번호

US 61/734007 (2012.12.06); US 61/734012 (2012.12.06); US 61/734010 (2012.12.06)

 

 

요약

Methods are provided for forming zeolite crystals suitable for gas phase separations with transport characteristics that are stable over time. The zeolitic materials and/or corresponding methods of synthesis or treatment described herein provide for improved stability in the early stages of process operation for some types of gas phase separations. The methods allow for synthesis of DDR type zeolites that have reduced contents of alkali metal impurities. The synthetic methods for reducing the non-framework alkali metal atom or cation impurity content appear to have little or no impact on the DDR crystal structure and morphology.

대표청구항

A method for performing a gas separation, comprising: contacting an adsorbent or membrane comprising DDR-type zeolite crystals with an input gas stream containing a first component and a second component to form a first gas stream enriched in the first component relative to the input gas stream, wherein the first component comprises CH4 and H2S and the second component is CO2, N2 or a combination thereof, or the first component is CH4 and the second component is CO2, N2, H2S, or a combination thereof; andcollecting a second gas stream enriched in the second component relative to the input gas stream,wherein the DDR-type zeolite crystals are synthesized using a synthesis mixture having an alkali metal to silica ratio of at least 0.01, the adsorbent or membrane being comprised of crystals comprising alkali metal impurities, the alkali metal impurities being non-framework alkali metal atoms or cations, said crystals having an alkali metal impurity content of 0.05 wt% or less, the alkali metal in the synthesis mixture preferably being sodium, the DDR-type zeolite crystals preferably being Sigma-1, ZSM-58, SSZ-28, or a combination thereof,wherein the adsorbent or membrane comprising DDR-type zeolite crystals is formed by a method comprising: forming DDR-type crystals from a synthesis mixture comprising an alkali metal cation, an oxide of aluminum, an oxide of silicon, an organic cation of a methyltropinium salt which is preferably methyltropinium iodide or chloride, and water;separating the DDR-type crystals from the synthesis mixture;calcining the DDR-type crystals;exposing the DDR-type crystals to an acidic solution under effective ion exchange conditions to reduce the content of alkali metal impurities in the DDR-type crystals;calcining the ion exchanged DDR-type crystals having a reduced content of alkali metal impurities; andforming an adsorbent or membrane based on the ion exchanged DDR-type crystals, the acidic solution being an at least 0.1 M solution of a strong acid or an organic acid having a pKa of 6 or less.

WIPS 패밀리

AR093811A1 | AR093812A1 | AU2013356504B2 | AU2013356590B2 | CA2892051A1 | CA2893587A1 | CN104822434B | CN104822628B | CN104955546A | EP2928578B1 | EP2928579A1 | EP2928825B1 | JP6166378B2 | JP6214672B2 | JP6234473B2 | KR10-2015-0091501A | KR10-2015-0093758A | RU0002619788C2 | RU0002648074C2 | SG11201503035XA | SG11201503212UA | TW201433349A | TW201438807A | US61/734007 | US61/734010 | US61/734012 | US9095809B2 | US9168483B2 | US9365431B2 | WOWO2014-088753A1 | WOWO2014-088754A1 | WOWO2014-088756A1

 

 

이전글/다음글
첨부파일 ep00002928578b1p.pdf
이전글 Graphene oxide nanocomposite membrane for gas separation, reduced graphene oxide nanocomposite membrane and method for manufacturing the same
다음글 美 DOE, CO2 포집 기술 개발에 1,130만 달러 추가 투입