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Institution

Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.


Papers
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Journal ArticleDOI
22 Oct 1992-Nature
TL;DR: In this paper, the synthesis of mesoporous inorganic solids from calcination of aluminosilicate gels in the presence of surfactants is described, in which the silicate material forms inorganic walls between ordered surfactant micelles.
Abstract: MICROPOROUS and mesoporous inorganic solids (with pore diameters of ≤20 A and ∼20–500 A respectively)1 have found great utility as catalysts and sorption media because of their large internal surface area. Typical microporous materials are the crystalline framework solids, such as zeolites2, but the largest pore dimensions found so far are ∼10–12 A for some metallophosphates3–5 and ∼14 A for the mineral cacoxenite6. Examples of mesoporous solids include silicas7 and modified layered materials8–11, but these are invariably amorphous or paracrystalline, with pores that are irregularly spaced and broadly distributed in size8,12. Pore size can be controlled by intercalation of layered silicates with a surfactant species9,13, but the final product retains, in part, the layered nature of the precursor material. Here we report the synthesis of mesoporous solids from the calcination of aluminosilicate gels in the presence of surfactants. The material14,15 possesses regular arrays of uniform channels, the dimensions of which can be tailored (in the range 16 A to 100 A or more) through the choice of surfactant, auxiliary chemicals and reaction conditions. We propose that the formation of these materials takes place by means of a liquid-crystal 'templating' mechanism, in which the silicate material forms inorganic walls between ordered surfactant micelles.

15,125 citations

Journal ArticleDOI
Jürgen Haffer1
11 Jul 1969-Science

1,863 citations

Journal ArticleDOI
TL;DR: In this article, a chromium reduction method was used for the determination of reduced inorganic sulfur compounds (pyrite + elemental sulfur + acid volatile monosulfides) in modern sediments and shales.

1,268 citations

Patent
10 Oct 1969
TL;DR: A family of crystal spheres called ZSM-5 is described in this paper, with the following characteristics: 0.9$0.2M2/NO:W2O3:5-100YO2:ZH2O wherein M is at least one locality, N is the valence threshold, W is selected from the group consisting of ALUMINUM and GALLIUM, Y is chosen from the grouping consisting of SILICON and GERMANIUM, and Z is from 0-40, and CHARACTERIZED by a SPEC
Abstract: A FAMILY OF CRYSTALLINE ZEOLITES, DESIGNATED ZSM-5, HAVING THE COMPOSITION, EXPRESSED AS MOLE RATIOS OF OXIDES AS FOLLOWS: 0.9$0.2M2/NO:W2O3:5-100YO2:ZH2O WHEREIN M IS AT LEAST ONE CATION, N IS THE VALENCE THEREOF, W IS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND GALLIUM, Y IS SELECTED FROM THE GROUP CONSISTING OF SILICON AND GERMANIUM, AND Z IS FROM 0-40, AND CHARACTERIZED BY A SPECIFIED X-RAY POWDER DIFFRACTION PATTERN. CATALYTIC CONVERSION CARRIED OUT IN THE PRESENCE OF SUCH ZEOLITES.

1,134 citations

Journal ArticleDOI
TL;DR: The Mercy Bay Member is a 200ft-thick limestone unit in the Upper Devonian Weatherall Formation as mentioned in this paper, which contains numerous organic build-ups and represents a Late Devonian reef tract located in the marine-shelf environment of an exogeosyncline.
Abstract: The Upper Devonian Weatherall Formation, outcropping on northeastern Banks Island, N.W.T., contains a 200-ft-thick limestone unit here termed the Mercy Bay Member. The member is Middle to Late Frasnian in age. Gyrfalcon Bluff has been chosen as the type section. Mercy Bay Member outcrops on the extreme northeastern portion of Banks Island, and many excellent exposures permit detailed paleogeographical and paleoecological studies. The member contains numerous organic build-ups and represents a Late Devonian reef tract located in the marine-shelf environment of an exogeosyncline situated between a tectonic highland to the northwest and a stable craton to the southeast. The main facies changes in the Mercy Bay Member occur in an east-west direction. The organic build-ups in the eastern part of the study area are narrow, linear bioherms trending north-south. They are encased in younger terrigenous clastic rocks. To the west the organic build-ups, which are biohermal in the lower part and biostromal in the upper, are more numerous. The lower bioherms trend east-west. Penecontemporaneous interbiohermal strata consist of dark, fine-grained argillaceous limestone. Organic build-ups on the western edge of the outcrop area are bioherms which trend north-south. The lower portion in all organic build-ups consists of corals and tabular stromatoporoids. These are interpreted as biogenetic banks constructed in the quiet and intermediate-energy zones (water depths more than 30 ft). The upper portion is composed of massive stromatoporoids. This facies represents rigid reefs constructed in the high-energy zone (above 30 feet). Successive sea-level rises allowed the reefs to grow upward. Cessation of reef growth was caused by an influx of terrigenous sediment related to the seaward migration of the northern and western shorelines. The outcropping organic build-ups of the Mercy Bay Member are tightly cemented, but frequent bitumen occurrences indicate that they were once oilbearing. Organic build-ups of the Mercy Bay Member probably occur in the subsurface to the west. End_Page 730------------------------

1,045 citations


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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202112
202011
201910
201818
201712
201610