Abstract: Disclosed is a method of removing mercury from contaminated liquid hydrocarbons (natural gas condensate) by contacting them with a dilute aqueous solution of alkali metal sulfide salt and recovering the treated liquid hydrocarbon. The addition of alkali metal hydroxide enhances the phase separation of hydrocarbon and aqueous solution.

Abstract: A method is provided for removing mercury from hydrocarbon fluids by high temperature reactive adsorption. A hydrocarbon feed passed through an adsorbent mass including a reactive adsorbent such as silver or copper sulfide on an alumina support. The optimum temperature of the feed to be treated depends upon the 90% boiling points corresponding to heavier feeds. A hydrocarbon condensate feed may be drawn from a stabilizer column in a natural gas processing plant at a temperature in excess of 400.degree. F. If a metallic silver/alumina adsorbent is employed, the adsorbent may be regenerated through high temperature oxidation. Once oxidation is complete, the temperature is lowered in a reducing or inert atmosphere.

Abstract: A process scheme for the recovery of high purity p-xylene or p-xylene and ethyl benzene from C.sub.8 aromatics is described. In the process, zeolites such as ZSM-5 type, zeolite beta and ZSM-11 with optimum silica alumina ratio is used as the adsorbent and light hydrocarbons, such as C.sub.5 is used as the desorbent. The process system is operated isothermally at low temperature and low pressures.

Abstract: Natural gas containing mercury is treated for liquifaction by contacting it with alkali and amine treating units to remove carbon dioxide and hydrogen sulfide. The amine and alkali treating units also contain sulfur in reacted form. This serves to guard downstream equipment against failure of upstream mercury-removing equipment, namely sulfur, on a selected support.

Abstract: A regenerable molecular sieve comprises 0.001-15% elemental silver or gold in or on zeolite A. The molecular sieve is capable of simultaneously removing mercury and water from a fluid. A method for impregenating zeolite A with elemental silver or gold comprising treating the zeolite A with a solution of a silver or gold salt of a carboxylic acid and heating the impregnated zeolite A at a temperature sufficient to decompose the salt is also provided. A method for simultaneously and repeatedly removing mercury and water from a hydrocarbon fluid by contacting the fluid with an effective amount of a molecular sieve comprising zeolite A and 0.001-15% elemental silver or gold and regenerating the zeolite A at elevated temperatures is also provided.

Abstract: Disclosed is apparatus comprising a means for injecting a controlled stream of hydrocarbon liquid into a concurrently flowing stream of gas in a Venturi forming droplets. Droplets are subsequently combusted in a gas stream. The level of radient emissions is measured photoelectrically. Results obtained are useful in predicting service life of combustor walls in jet engines and the like.

Abstract: The present invention relates to an improved process for synthesizing pyridine or alkylpyridines comprising reacting ammonia with a carbonyl reactant in the presence of a catalyst composition which comprises a crystalline silicate having a silica/alumina mole ratio of at least 12 and a Constraint Index within the range of 1 to 12, the improvement comprising reacting said ammonia with said carbonyl compound in the presence of a catalyst composition which comprises (i) a crystalline silicate having a silica/alumina mole ratio of at least about 12, a Constraint Index of from about 1 to about 12, and an Alpha Value of less than about 50, and (ii) a binder of amorphous silica.

Abstract: A low temperature process for repairing leakage-causing defects such as cracks, fissures, etc., in a cryogenic heat exchanger used in the liquefaction of a gas such as natural gas, especially one constructed from aluminum, involves the use of a low temperature, quick-curing filler composition to at least temporarily fill the defects and prevent further leakage. Thereafter, a sealant and, optionally, a metal patch is applied to and held in place against the sealant-treated damaged site employing a relatively slow-curing adhesive composition which exhibits good long-term sealing, and bonding performance if a patch is used, at cryogenic temperatures.

Abstract: A continuous regenerator for the two-stage regeneration of hot coked fluid catalytic cracking catalyst, and a method for regenerating coked catalyst by combustion with air and with reduced emissions of nitrogen oxides, or with reduced emissions of any two or more of the pollutants which include nitrogen oxides, sulfur oxides and carbon monoxide.

Abstract: Combustible carbonaceous particles such as particles of sponge coke or coal are incorporated with the circulating inventory of cracking catalyst in a fluid catalytic cracking unit. The carbonaceous particles selectively sorb metal contaminants in the feed, thereby extending catalyst life, and they also serve to reduce NO.sub.x emissions in certain instances. The sorbed metals values may be recovered as the carbonaceous particles are burned.

Abstract: A system and a process are provided for cooling a natural gas feed to an aluminum heat exchanger to protect it from mercury damage and increase productivity. A multi-stage vaporization system is employed wherein the last stage or lowest pressure heat exchanger is provided with a propane ejector. This allows the last stage heat exchanger to operate at a very low pressure without unduly reducing the pressure within other parts of the system. The last stage heat exchanger is accordingly able to sufficiently reduce the temperature of the feed to the aluminum heat exchanger to protect against mercury contamination. In addition, the decreased heat transfer load of the aluminum heat exchanger leads to an increase in the LNG production rate.

Abstract: Particulate coal is rendered less subject to spontaneous ignition by simultaneously spraying or otherwise contacting it and cooling it with an aqueous emulsion in water of a light cycle oil, heavy cycle oil, clarified slurry oil, durene, and other carbonaceous materials derived from coal liquefaction and petroleum refining. Aqueous polymer emulsions and oxidation inhibitors can also be used.

Abstract: The opportunity for mercury vapor, a common component of natural gas, to form a corrosive amalgam with the aluminum construction material of a cryogenic heat exchanger used in natural gas liquefaction operations is greatly minimized by cooling the mercury-containing gas to a temperature at or below the freezing point of mercury prior to introducing the gas to the heat exchanger.

Abstract: A process and composition for removing elemental mercury vapor from a gas such as natural gas is disclosed. The mercury-containing gas is contacted with a solid support such as carbon containing elemental sulfur and at least one metal which catalyzes the reaction: 2 Hg+S.sub.2 .revreaction.2 HgS.

Abstract: The deriming of the interior surfaces of cryogenic heat exchangers employed in the liquefaction of mercury-containing gases, in particular, natural gas, is accomplished by contacting the solids present upon the interior surfaces of the heat exchanger, usually as ice and hydrocarbonaceous materials, with a solvent or mixture of solvents at a temperature which is at or below the freezing point of mercury whereby solids will dissolve in the solvent and be removed from the interior surfaces of the heat exchanger and a substantial part of the mercury present within the heat exchanger will be in the solid state. In this way, the corrosive effects of elemental mercury vapor upon the heat exchanger, especially in the cases where aluminum is the material of construction, can be greatly lessened or minimized.

Abstract: A catalytic process is provided for converting feedstock containing C.sub.2 to C.sub.8 aliphatic hydrocarbons to aromatics by contacting said feedstocks, under conversion conditions, with a balanced acid/hydrogenation dual function catalyst comprising as the acid component a crystalline zeolite catalyst having a Constraint Index of about 1 to 12 and an alpha value no higher than about 100, and as the hydrogenation component a minor amount of an added metal constituent comprising at least 50 weight percent of a component consisting of zinc and a metal from Group IB of the Periodic Table, e.g. copper, thereby converting the feedstock to aromatics.

Abstract: A process is disclosed for the removal of heat stable salts from ethanolamine gas purification process units using ion-exchange resins and for regenerating said ion-exchange resins in-situ.

Abstract: Gas liquefaction apparatus contaminated with mercury is decontaminated by circulating through the apparatus a solvent containing sulfur or a gas containing a sulfur reactant such as sulfur, hydrogen sulfide or alkyl thiol.

Abstract: Mixtures of polynitrate esters and selected amines are effective in improving the cetane number of diesel and alcohol fuels.

Abstract: Macrostructural units of various shapes and forms having a catalytically-active zeolite surface particularly useful in catalyzing hydrocarbon conversion reactions are prepared by:(a) mixing a slurry containing one or more of finely divided silicon, silica gel, alumina, aluminum hydroxide and kaolin, and having the desired ratio of silicon atoms to aluminum atoms, with plasticizer to form a plastic mass;(b) shaping the plastic mass to a desired configuration;(c) calcining the shaped plastic mass at 500.degree. to 800.degree. C. for 1 to 10 hours to form a rigid macrostructural unit having the same configuration as the shaped plastic mass;(d) crystallizing 5 to 80% of the rigid macrostructural unit obtained by calcination to crystalline aluminosilicate zeolite; and,(e) activating the crystalline aluminosilicate zeolite to catalytically-active zeolite.