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.

Shaft alignment method and apparatus

Abstract: A cylindrical alignment housing is fixed to a housing of one of two axially aligned items of equipment. A cylindrical bearing housing is concentrically positioned around the cylindrical alignment housing, such that the cylindrical bearing housing is rotatably supported at a given position on the cylindrical alignment housing, which is fixed to the housing of the aforesaid one item of equipment. A mechanical coupling is provided between the bearing housing and the shaft of the other of the two equipment items that the bearing housing and the shaft will rotate in concert. A laser is positioned on the rotatable bearing housing and a prism is positioned on the other of the two items of equipment. The cylindrical bearing housing and the shaft of the aforesaid other equipment item are rotated together in concert, and measurements are taken using the laser and prism to determine whether the shafts are properly aligned with each other.

Method for enhancing catalytic activity

Abstract: A hydrocarbon feed for use in a catalytic conversion process that utilizes a zeolite catalyst, and that contains a catalytically deleterious impurity, is refined by contact with a zeolitic sorbent. The invention is applicable to dewaxing, with an example illustrating reduction by 100° F. of the initial equilibrium (lineout) temperature by the method of this invention. Other reactions include conversions of aromatic hydrocarbons such as alkylation, isomerization and disproportionation.

Upgrading aliphatic naphthas to higher octane gasoline

Abstract: In the conversion upgrading of feed naphtha boiling range hydrocarbons which are predominantly aliphatic to equivalent boiling range product of increased aromatics content and octane number by contact of the feed with a high silica to alumina ratio crystalline aluminosilicate zeolite having a constraint index of about 1 to 12 and a crystal density of not substantially lower than about 1.6 grams per cubic centimeter under conversion conditions, which zeolite has incorporated therewith one or more metals, such as zinc or cadmium, which increase the aromatization activity thereof; the improvement, whereby increasing the liquid yield of such conversion at equivalent octane number increase, which comprises using as the catalyst for such conversion a metal modified zeolite as aforesaid having a modified activity equivalent to the activity of such zeolite which has had incorporated therewith in addition up to about 3 weight percent of at least one element of groups Ia and/or Va of the Periodic Table. Operation according to this invention is particularly appropriate in producing products having octane numbers of at least about 82.

Method for extracting bitumen from tar sands

Abstract: A method for extracting bitumen from crushed mined tar sands comprising contacting the mined tar sands with a solvent in the presence of sonic energy in the frequency range of 0.5 to 2.0 kHz. Specifically, a solvent is first mixed with crushed mined tar sands and the mixture is then formed into a slurry of tar sand suspended in the solvent. Thereafter the tar sand slurry is injected into the top of a vertically disposed, substantially rectangular shaped, hollow acoustic chamber of uniform cross-section. Fresh solvent is injected into the bottom of the acoustic chamber and flows upwardly through the cell. The fresh solvent is injected into the bottom of the acoustic chamber at a rate low enough whereby the tar sand particles in the slurry fall by gravity through the upwardly flowing solvent. The tar sand particles and solvent in the acoustic chamber are subjected to acoustic energy in the frequency range of 0.5 to 2.0 kHz whereby the bitumen is separated from the tar sand and dissolved by the upwardly flowing solvent without cavitation of the solvent. The bitumen dissolved in the solvent is recovered from the top of the acoustic chamber and transferred by pipeline to an off-site refinery. The bitumen-extracted sand particles recovered from the bottom of the acoustic chamber may be recycled to the top of the acoustic chamber to recover additional bitumen after injection of the slurry has been discontinued.

Nitrous oxide and vertical mixing in the equatorial Pacific during the 1982–1983 El Niño

Abstract: Nitrous oxide concentrations in the eastern equatorial Pacific (105°W–158°W) during the later stages of the 1982–1983 El Nino were within a few percent of saturation at most stations, indicating that normal upwelling had not yet returned. The average flux of N 2 O into the mixed layer was 0.9 ± 0.7 μ mol m −2 d −1 , and was largely controlled by eddy diffusion near the base of the mixed layer. Eddy coefficients, based on the local vertical heat flux, varied from 0.1 to 1.0 cm 2 s −1 , and correlated well with the observed buoyancy frequencies ( N = 0.036 ± 0.007 s −1 ). A comparison of the flux rate with that in a normal year would suggest that the 1982–1983 El Nino event reduced the flux of N 2 O to the atmosphere in this region by about 80%. Simple flux calculations indicate that in non-upwelling areas the ventilation rate of the mixed layer is relatively rapid compared to the thermocline flux divergence, hence surface concentrations of N 2 O will be near equilibrium. In contrast, the eastern equatorial Pacific in a normal year is characterized by strong vertical mixing and upwelling, both of which should result in large supersaturations of N 2 O.