There is provided a process for the direct partial oxidation of methane with oxygen, whereby organic compounds comprising higher hydrocarbons including C.sub.5 + liquid hydrocarbons are produced. The catalyst used in this reaction may be a ZSM-5 catalyst. The process involves the use of an initial cofeed, such as propane, in admixture with the methane and oxygen to induce the formation of liquid hydrocarbons. As the reaction progresses, the flow of cofeed is shut off, and liquid hydrocarbons con...

A method of converting an existing helicopter airframe, such as a UH-1H/V or a UH-1D, to a special purpose use such as, for example, a gunship or a firefighter, and a helicopter constructed thereby. The process takes a conventional, multi-passenger, helicopter from a primary design use to a second, un-anticipated use after the primary function has ceased. The invention converts the helicopter from a dual-piloted, multi-passenger aircraft to a helicopter gunship flown by a single operator/pilot. ...

A contact material composition containing an intimately mixed, mixed oxide of at least one cationic species of a naturally occurring Group IIIB element, at least one cationic species of a Group IIA metal of magnesium, calcium, strontium, and barium and a cationic species of aluminum, as well as methods for hydrocarbon conversion using such contact material compositions are provided.

Crystalline aluminosilicate zeolites are used as catalysts for various hydrocarbon conversion processes and are particularly useful for conversion of paraffins in the presence of an alkylatable aromatic hydrocarbon such as benzene.

A digital-to-analog converter having a nonlinear transfer characteristic includes a voltage divider connected in parallel with a reference voltage and a switching array connected to the voltage divider. The switching array is actuated in accordance with the digital word which is being converted to an analog signal. The voltage divider is dimensioned to provide a nonlinear transfer characteristic. The digital-to-analog circuit is also employed for performing a successive approximation analog-to-d...

A catalyst for hydrocarbon conversion contains a silica-containing material having a plate or sheet morphology, for example "FU-1" and a material having catalytic activity for hydrocarbon conversion, for example rare-earth exchanged zeolite Y. The catalyst is especially suitable for cracking heavy fractions to naphtha-type products, apparently because the plate or sheet material provides channels by which large molecules can gain access to active centers in the catalyst.

A process is disclosed for catalytically hydroconverting asphalt in a first reactor in the presence of a hydrogenated middle distillate and hydrogen under conditions effecting both hydroconversion of the asphalt and dehydrogenation of said distillate, fractionating the reaction product into at least one distillate fraction and a residual fraction, catalytically hydrogenating the middle distillate fraction in a second reactor and circulating at least part of the second reaction product to the fir...

Conversion plug having the general shape of a shotgun shell, having a large counterbore formed in the end adjacent the hammer and having a small threaded counterbore to receive a nipple adapted to receive a percussion firing element.

A method for chemically converting methane gas into higher molecular weight hydrocarbons by using chlorine gas as a recyclable, active catalyst.

Hydrocarbon hydroconversion, especially hydrocarbon reforming, using catalysts whose supports have been prepared by a sol-gel process. For hydrocarbon reforming, it is preferred that the primary particles used to prepare the porous gel should have been prepared by a vapor phase condensation method, for example flame hydrolysis and that the support should have a narrow pore size distribution. The process produces much less gas by hydrocracking at given aromatics yields than comparative processes ...