Process for removal of carbonyl sulfide from hydrocarbons - Process to control conversion of C4+ and heavier stream to lighter products in oxygenate conversion reactions - Processes for the purification of higher diamondoids and compositions comprising such diamondoids - Substituted polycyclic cyclopentadienes and method for their preparation - Alkylation process - Separating dimethyl ether from an olefin stream - Reducing CO2 levels in CO2-rich natural gases converted into liquid fuels - Circulating fluid bed reactor system - Synthetic isoparaffinic premium heavy lubricant base stock - Producing polyisobutylenes - Process for separating unsaponifiable valuable products from raw materials - Conversion of heavy aromatics - The oligomerization of C2 C8-olefins - Treating oxygenate-containing feeds and their use in conversion of oxygenates to olefins

Process for removal of carbonyl sulfide from hydrocarbons

The invention comprises a process for removal of carbonyl sulfide from a hydrocarbon, which comprises contacting a hydrocarbon stream containing carbonyl sulfide with an adsorbent and then regenerating the adsorbent by passing a heated gas, containing a hydrolyzing agent. The adsorbent that is regenerated by using this process retains at least 70% of its capacity for adsorption of sulfur as compared to fresh adsorbent.

Kanazirev, Vladislav I.; Dangieri, Thomas J.; Gorawara, Jayant K.
UOP LLC; January 18, 02005
#6843907

Document online
Top


Process to control conversion of C4+ and heavier stream to lighter products in oxygenate conversion reactions

A method for converting heavy olefins present in a product stream exiting a first reaction zone into light olefins and carbonaceous deposits on a catalyst without separation of the heavy olefins from the product stream exiting the first reaction zone. The method comprises creating the product stream exiting the first reaction zone, the product stream exiting the first reaction zone comprising the heavy olefins, moving the product stream exiting the first reaction zone to a second reaction zone without separation of the heavy olefins from the product stream exiting the first reaction zone, and contacting the product stream exiting the first reaction zone with the catalyst under conditions effective to form the light olefins, the contacting causing the carbonaceous deposits to form on at least a portion of the catalyst.

Vaughn, Stephen N.; Ham, Peter G.; Kuechler, Keith H.
ExxonMobil Chemical Patents Inc.; January 18, 02005
#6844476

Document online
Top


Processes for the purification of higher diamondoids and compositions comprising such diamondoids

Disclosed are processes for the recovery and purification of higher diamondoids from a hydrocarbonaceous feedstock. Specifically disclosed is a multi-step recovery process for obtaining diamondoid compositions enhanced in tetramantane components and higher diamondoid components. Also disclosed are compositions comprising at least about 10 weight percent of non-ionized tetramantane components and higher diamondoid components and at least about 0.5 weight percent of non-ionized pentamantane components and higher diamondoid components based on the total weight of diamondoid components present.

Dahl, Jeremy E.; Carlson, Robert M.
Chevron U.S.A. Inc.; January 18, 02005
#6844477

Document online
Top


Substituted polycyclic cyclopentadienes and method for their preparation

New polycyclic cyclopentadiene compounds having the formula (II) wherein the various substituents and symbols R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, Z.sup.1 and Z.sup.2 and "n" have the meaning specified in the description. These compounds can form metallocene complexes with transition metals, which have shown unusual properties in the (co)polymerization of ethylene and alpha-olefins in general ##STR1##

Biagini, Paolo; Vigliarolo, Diego; Borsotti, Giampietro; Santi, Roberto
Polimeri Europa S.p.A.; January 18, 02005
#6844478

Document online
Top


Alkylation process

A process for the alkylation of paraffins with olefins includes contacting the paraffin with the olefin under alkylation conditions with a zeolite having an AAI number of at least about 1.0. In a preferred process isobutane is alkylated with cis-2-butene to produce a high octane (RON) gasoline product containing trimethylpentane isomers.

Yeh, Chuen Y.; Gao, Xingtao; Angevine, Philip J.
ABB Lummus Global Inc.; January 18, 02005
#6844479

Document online
Top


Method of separating dimethyl ether from an olefin stream

This invention is directed to a method of removing dimethyl ether from an olefin stream. Dimethyl ether is removed from the olefin stream by first separating the olefin stream into a first stream comprising dimethyl ether and lighter boiling point compounds, and a second stream comprising C.sub.4 + olefin and higher boiling point hydrocarbons. The dimethyl ether is then separated from the first stream using extractive distillation.

Lattner, James R.; Lumgair, Jr., David R; Kabin, Jeffrey A.; Nicoletti, Michael Peter
ExxonMobil Chemical Patents Inc.; January 18, 02005
#6844480

Document online
Top


Reducing CO2 levels in CO2-rich natural gases converted into liquid fuels

Provided is a process for converting CO.sub.2 -rich natural gas into liquid fuel. The process includes introducing a CO.sub.2 -rich natural gas feed stream into a synthesis gas formation reactor and then forming a synthesis gas. At least a portion of the synthesis gas is then introduced into a Fischer-Tropsch reactor. A Fischer-Tropsch process is conducted generating a Fischer-Tropsch product. A naphtha is separated from the Fischer-Tropsch product and introduced into a naphtha reformer. Hydrogen by-product is generated by reforming the naphtha to obtain a C.sub.6 -C.sub.10 product having a hydrogen to carbon ratio less than about 2.0. At least a portion of the hydrogen by-product is recirculated and mixed with the CO.sub.2 -rich natural gas feed stream. The hydrogen by-product mixes with the CO.sub.2 -rich natural gas feed stream such that at least a portion of the CO.sub.2 present in the natural gas feed stream is converted into additional CO by a reverse water gas shift reaction so that the synthesis gas derived from the feed stream contains a volume amount of CO.sub.2 that is less than a volume amount of CO.sub.2 present in the feed stream prior to mixing with the hydrogen by-product. Finally, the additional CO is converted into hydrocarbons in the Fischer-Tropsch reactor.

O'Rear, Dennis J.
Chevron U.S.A. Inc.; January 25, 02005
#6846404

Document online
Top


Circulating fluid bed reactor system

This invention is to a circulating fluid bed reactor that is designed so as to have the ability to adjust catalyst holdup within the reaction zone of the reactor while maintaining substantially constant catalyst circulation rate through the reaction zone. The ability to adjust catalyst hold up independently of catalyst circulation rate provides an advantage of having the ability to maintain a constant conversion level as catalyst activity or feed rates change.

Lattner, James R.; Smith, Jeffrey S.; Davuluri, Rathna P.
ExxonMobil Chemical Patents Inc.; January 25, 02005
#6846405

Document online
Top


Synthetic isoparaffinic premium heavy lubricant base stock

A synthetic, isoparaffinic heavy hydrocarbon composition useful as a heavy lubricant base stock contains hydrocarbon molecules having consecutive numbers of carbon atoms, is a liquid at 100.degree. C., at which temperature its kinematic viscosity is above 8 cSt and has respective initial and end boiling points of at least 850 and 1000.degree. F. (454 and 538.degree. C.). The branching index BI and the branching proximity CH.sub.2 >4 of the isoparaffinic hydrocarbon molecules, are such that: BI-0.5(CH.sub.2 >4)<15; and (a) BI+0.85(CH.sub.2 >4)<45; (b) as measured over the hydrocarbon composition as a whole.

Johnson, Jack Wayne; Bishop, Adeana Richelle; Genetti, William Berlin; Ansell, Loren Leon; Fiato, Rocco Anthony
ExxonMobil Research and Engineering Company; January 25, 02005
#6846778

Document online
Top


Method for producing polyisobutylenes

Polyisobutenes are prepared by cationic polymerization of isobutene or isobutene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride as a catalyst, the catalytic activity of the boron trifluoride being partially or completely eliminated at a desired time by means of a solid deactivator, by a process in which the solid deactivator has boron trifluoride-binding primary, secondary, tertiary and/or quaternary nitrogen atoms and is insoluble in the reaction mixture.

Wettling, Thomas; Borchers, Dirk; Verrelst, Wim; Rath, Hans Peter
BASF Aktiengesellschaft; January 25, 02005
#6846903

Document online
Top


Process for separating unsaponifiable valuable products from raw materials

Disclosed are processes for separating valuable products, including unsaponifiable materials, from any given matrix of raw materials that is mainly composed of saponifiable components and unsaponifiable components. Preferred methods include converting sodium or potassium soaps obtained from the saponification of a starting material into metallic soaps which have a lower melting point, and when melted, have viscosity sufficiently low to enable processing such as by distillation evaporation processes. Preferred raw materials include animal or vegetable products, as well as by-products, residues, and waste products from the processing of animal or vegetable products, such as from food processing, cellulose processing and the like. Valuable products which may be obtained by the disclosed processes include sterols, vitamins, flavonoids, and tocopherols.

Rohr, Rodolfo; Rohr, Raul; Trujillo-Quijano, Jose Anibal
Resitec Industria Quimica Ltda.; January 25, 02005
#6846941

Document online
Top


Method of conversion of heavy aromatics

A method is provided for conversion of heavy alkylaromatic compounds, particularly those in the C.sub.8 -C.sub.12 range, into more valuable aromatics of benzene, toluene and xylene utilizing a toluene disproportionation unit containing a nickel, palladium or platinum-modified mordenite catalyst. The method allows large amounts of these heavy alkylaromatic compounds to be processed without adversely affecting catalyst activity or catalyst life. This is accomplished by introducing the heavy alkylaromatic compounds into the reactor at constant reaction severity conditions and maintaining those conditions during conversion.

Xiao, Xin; Butler, James R.
Fina Technology, Inc.; January 25, 02005
#6846964

Document online
Top


Method for the oligomerization of C2 C8-olefins

C.sub.2 -C.sub.8 -olefins are oligomerized in a process in which a stream of an olefin-containing hydrocarbon mixture is passed over a heterogeneous, nickel-containing oligomerization catalyst in n successive adiabatically operated reaction zones, where n.gtoreq.2, and the hydrocarbon mixture experiences a temperature increase 66 T.sub.react in each reaction zone and the hydrocarbon mixture enters the first reaction zone at a temperature T.sub.in and before entering each further reaction zone is cooled to a temperature which in each case may be up to 20.degree. C. above or below T.sub.in, and the relative catalyst volumes of the individual reaction zones are such that the difference in .DELTA.T.sub.react between any two reaction zones is not more than 20.degree. C.

Schulz, Ralf; Walter, Marc; Neumann, Hans-Peter; Brox, Wolfgang
BASF Aktiengesellschaft; January 25, 02005
#6846965

Document online
Top


Method and apparatus for treating oxygenate-containing feeds and their use in conversion of oxygenates to olefins

A feed vaporization process and apparatus for oxygenate to olefin conversion is provided which uses a vapor-liquid disengaging drum to separate non-volatiles and/or partial non-volatiles from volatiles in the oxygenate feed and produce a vaporized effluent that is reduced in non-volatiles and/or partial non-volatiles while at the same time maintaining the effluent at optimal temperature and pressure as a feed for oxygenate to olefin conversion.

Lumgair, Jr., David Ritchie; Beech, James H.; Nicoletti, Michael Peter
ExxonMobil Chemical Patents Inc.; January 25, 02005
#6846966

Document online
Top

Patent Alert

 

Back