1
Louis D Rollmann, Ernest W Valyocsik: Synthesis of zeolite ZSM-5. Mobil Oil Corporation, Charles A Huggett, Raymond W Barclay, February 13, 1979: US04139600 (74 worldwide citation)

As synthesized by conventional technique, zeolite ZSM-5 is crystallized in the presence of substantial amount of tetraalkylammonium cations, the alkyl groups of which contain 2 to 5 carbon atoms, such as, for example, tetrapropylammonium. When synthesized in the conventional way, ZSM-5 contains tetr ...


2
Louis D Rollmann: ZSM-5 containing aluminum-free shells on its surface. Mobil Oil Corporation, Charles A Huggett, Raymond W Barclay, Claude E Setliff, May 9, 1978: US04088605 (58 worldwide citation)

Aluminosilicate zeolites are prepared containing an outer aluminum-free shell. The outer shell is essentially SiO.sub.2 that has crystallized on the zeolite surface in the ZSM-5 type configuration, leading to a more selective catalyst.


3
Louis D Rollmann: Zeolite synthesis. Mobil Oil Corporation, C A Huggett, C J Speciale, G W Allen, October 20, 1981: US04296083 (55 worldwide citation)

An improved method for synthesizing improved crystalline zeolites characterized by an alumina to silica mole ratio of not greater than 0.083 and a constraint index within the approximate range of 1 to 12 is provided. The improved method comprises forming a reaction mixture containing one or more sou ...


4
George T Kerr, Louis D Rollmann: Directed crystallization of synthetic aluminosilicates. Mobil Oil Corporation, Charles A Huggett, Michael G Gilman, John A Cooper, December 6, 1977: US04061717 (49 worldwide citation)

Synthetic crystalline aluminosilicate zeolites are crystallized from an aqueous reaction mixture comprising sources of alkali metal oxide, silicate, aluminate and an ionene or ionomer which contains positively charged nitrogen atoms in such quantity as to satisfy some of the cationic sites of the ev ...


5
Louis D Rollmann: ZSM-5 Containing aluminum-free shells on its surface. Mobil Oil Corporation, Charles A Huggett, Raymond W Barclay, Claude E Setliff, May 20, 1980: US04203869 (38 worldwide citation)

Aluminosilicate zeolites are prepared containing an outer aluminum-free shell. The outer shell is essentially SiO.sub.2 that has crystallized on the zeolite surface in the ZSM-5 type configuration, leading to a more selective catalyst.


6
Louis D Rollmann: Sorbent for removing metals from fluids. Mobil Oil Corporation, Charles A Huggett, Michael G Gilman, Laurence P Hobbes, July 6, 1982: US04338288 (35 worldwide citation)

This invention provides a sorbent composition, manganese nodules with occluded sulfur, effective for removing metal contaminants from gases or liquids. It is effective for removing lead contaminant from gasoline and mercury from water or natural gas. It may be used in the chlor-alkali process for cl ...


7
Louis D Rollmann, Ernest W Valyocsik: Manufacture of nitrogenous zeolites. Mobil Oil Corporation, Charles A Huggett, Vincent J Frilette, May 27, 1980: US04205053 (32 worldwide citation)

A process for manufacturing synthetic nitrogenous zeolites such as ZSM-5 in which the shape or some other feature of the microscopic crystals is controlled by including in the forming solution an organic basic nitrogen compound in addition to the organic nitrogenous template.


8
Louis D Rollmann, Dennis E Walsh: Deasphalting process. Mobil Oil Corporation, Charles A Huggett, Michael G Gilman, Charles J Speciale, April 13, 1982: US04324651 (24 worldwide citation)

An asphalt-containing mineral oil can be deasphalted at temperatures above about 80.degree. C. with methanol serving as the deasphalting solvent. Two liquid phases are produced, an asphalt-rich phase and a methanol-rich phase. By cooling the methanol-rich phase to a temperature below 80.degree. C., ...


9
Louis D Rollmann: ZSM-5 particle containing aluminum-free shells on its surface. Mobil Oil Corporation, Charles A Huggett, Raymond W Barclay, Claude E Setliff, April 10, 1979: US04148713 (22 worldwide citation)

Aluminosilicate zeolites are prepared containing an outer aluminum-free shell. The outer shell is essentially SiO.sub.2 that has crystallized on the zeolite surface in the ZSM-5 type configuration, leading to a more selective catalyst.


10
Louis D Rollmann, Ernest W Valyocsik: Method of preparing silico-crystal ZSM-48. Mobil Oil Corporation, Alexander J McKillop, Michael G Gilman, Charles J Speciale, December 27, 1983: US04423021 (21 worldwide citation)

A new porous silico-crystal, a method of making same and the use thereof in catalytic conversion of organic compounds. The new product has a composition, expressed in terms of moles of anhydrous oxides per 100 moles of silica as follows: