Abstract:
A process for the conversion of syngas by contact of syngas under conversion conditions with catalyst having as components zinc oxide, copper oxide, aluminium oxide, Y zeolite and clay in which (A) in a one step process for conversion of syngas to dimethyl ether, the catalyst has as components an extruded mixture of zinc oxide, copper oxide, gamma aluminum oxide, Y zeolite and clay; (B) in a two step process for conversion of syngas to light olefins, a catalyst system is employed that has in the first step a catalyst mixture of zinc oxide, copper oxide, aluminum oxide, Y zeolite and clay and the catalyst employed in the second step is SAPO-34; SAPO-34 modified with lanthanum (III) nitrate hexahydrate; SAPO-34 modified with magnesium nitrate hexahydrate; SAPO-34 modified with tributyl borate or SAPO-34 modified with triethyl phosphate or (C) in a two step process for conversion of syngas to light olefins, the pressure on the effluent from the contact of syngas with a mixture of zinc oxide, copper oxide, aluminium oxide, Y zeolite and clay is reduced before contact with a second catalyst of SAPO-34. The catalyst systems employed in the processes herein.
Abstract:
A sorbent composition comprising a reduced-valence promoter and a steam-treated support can be used to desulfurize a hydrocarbon-containing fluid such as cracked-gasoline or diesel fuel.
Abstract:
A substantially water-free hydrocarbon feed is charged to a reformer reactor operated under reforming conditions, thereafter, a chlorine-containing additive is introduced, without the simultaneous introduction of water, into the substantially water-free hydrocarbon feed being charged to the reformer reactor in an amount and for a time period that are effective to inhibit deactivation of the reformer catalyst; thereafter, the introduction of the chlorine-containing additive is terminated and the charging of the substantially water-free hydrocrbon feed to the reformer reactor is continued.
Abstract:
The time required for establishing a multilateral well is reduced by enlarging a section of a wellbore and running a multilateral tool (7) which includes a preassembled combination of casing sections that form dual casing strings extending from the primary casing. The multilateral tool (7) incorporates a carrier section (2), a lateral section (8), and a main section (5). The tool is run with the lateral section (8) releasably held in coaxial alignment within the carrier section (2), and with the main section (5) fixed to the lower end of the carrier section (2). Once in place, the lateral section (8) is released and diverted out of a preformed window (4) in the lower end of the carrier section (2) and runs generally parallel to the main casing section (5). A lateral junction is thus formed at the carrier section window (4) in which dual casing strings are connected to the primary casing. A second window, preformed in the upper end of lateral section (8) is aligned with the bore of the primary casing when the lateral casing section is fully extended out of the carrier section window (4), thus permitting recovery of a diverting device incorporated in the carrier casing section (2) through the second window. The dual strings are then individually drilled and completed with pressure integrity between the dual strings maintained by using straddle equipment across the lateral junction.
Abstract:
A process for the production of ethers and alkylate from a paraffin feedstock. The process includes a novel arrangement of dehydrogenation, isomerization, separation, etherification and alkylation to provide such products.
Abstract:
A process for desalting a crude oil comprises (1) injecting steam into the oil to form a steam-injected oil; (2) adding water to the steam-injected oil to form a mixture; (3) introducing the mixture to a desalter; (4) inducing the formation of aqueous phase and oil phase; and (5) separating the oil phase from the aqueous phase. Where there are two desalting stages for desalting crude oil, the process can be carried out in either the first stage or second stage, or both stages. The process can also be similarly employed in a multistage desalting process.
Abstract:
A self supporting film having one or more layers wherein at least one layer has a percent haze of less than 17.8 and the polymer of that layer consists essentially of a polyethylene having a density of at least 0.925 grams per cc, a molecular weight distribution of no more than 4, optionally containing a fluoroelastomer, and methods for making such film are disclosed.
Abstract:
A two-step polymerization process for producing a polyolefin having a bimodal molecular weight distribution is provided. In step one, under polymerization conditions, at least two different alpha-olefins are contacted with a catalyst system which comprises an aluminoxane and a metallocene, selected from the group consisting of mono, di, and tri-cyclopentadienyls and substituted cyclopentadienyls, of a metal selected from titanium, vanadium, chromium, zirconium, niobium, molybdenum, hafnium, tantalum, and tungsten, provided however if said metal is titanium then a metallocene of at least one other of said metals is present such that a first polymerization mixture is formed which comprises a low crystallinity, high molecular weight, copolymer, unreacted monomer, unreacted comonomer, and catalyst. This is followed by contacting, under polymerization conditions, hydrogen (and optionally additional alpha-olefin), with said first polymerization mixture which comprises copolymer, unreacted monomer, unreacted comonomer, and catalyst, such that a second polymerization mixture is formed which comprises a low crystallinity, high molecular weight copolymer, and a high crystallinity, low molecular weight homopolymer.
Abstract:
Sequential charging of initiator and monomers in a multistage solution polymerization process involving conjugated diene and monovinylaromatic monomers wherein the final charge is a mixture of these monomers results in the production of resinous polymodal linear block copolymers each with a terminal tapered block. A typical 5-stage charge sequence is as follows: Stage 1: (Si); Stage 2: (Si); Stage 3: (B); Stage 4: (Si); Stage 5: (S+B) wherein (Si) is monovinylaromatic monomer and initiator; (B) is conjugated diene monomer and (S+B) is monovinylaromatic monomer and conjugated diene monomer. At each stage, polymerization is allowed to continue until no free monomer is present. The trimodal block copolymer products comprise high, medium and low molecular weight species designated, respectively, as S1-S2-B1-S3-B2->S4; S2-B1-S3-B2->S4; and S3-B2->S4 wherein S1, S2 and S3 represent, respectively, polyvinylaromatic blocks resulting from polymerization of the first, second and third charges of monovinylaromatic monomer (stages 1,2 and 4); B1 represents a polydiene block resulting from polymerization of the first charge of conjugated diene monomer (stage 3); and B2->S4 represents a terminal tapered copolymer block resulting from polymerization of the conjugated diene and monovinylaromatic monomers (stage 5). The subject copolymers can be fabricated into sheets and molded objects possessing little color, a high degree of transparency and excellent impact resistance. These fabricated products do not craze on being impacted.
Abstract:
Basic impurities, in particular ammonia, are removed from monoolefin-containing feeds, in particular an isobutylene-containing feed, by contacting with a hydrated acidic clay.