Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
  • C10G73/02—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L1/00—Liquid carbonaceous fuels
  • C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L1/00—Liquid carbonaceous fuels
  • C10L1/10—Liquid carbonaceous fuels containing additives
  • C10L1/14—Organic compounds
  • C10L1/16—Hydrocarbons
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L1/00—Liquid carbonaceous fuels
  • C10L1/10—Liquid carbonaceous fuels containing additives
  • C10L1/14—Organic compounds
  • C10L1/16—Hydrocarbons
  • C10L1/1691—Hydrocarbons petroleum waxes, mineral waxes; paraffines; alkylation products; Friedel-Crafts condensation products; petroleum resins; modified waxes (oxidised)
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L10/00—Use of additives to fuels or fires for particular purposes
  • C10L10/14—Use of additives to fuels or fires for particular purposes for improving low temperature properties
  • C10L10/16—Pour-point depressants
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
  • C10M111/04—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential at least one of them being a macromolecular organic compound
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
  • C10M169/04—Mixtures of base-materials and additives
  • C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
  • C10L1/00—Liquid carbonaceous fuels
  • C10L1/10—Liquid carbonaceous fuels containing additives
  • C10L1/14—Organic compounds
  • C10L1/16—Hydrocarbons
  • C10L1/1616—Hydrocarbons fractions, e.g. lubricants, solvents, naphta, bitumen, tars, terpentine
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/022—Ethene
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
  • C10M2205/022—Ethene
  • C10M2205/0225—Ethene used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/17—Fisher Tropsch reaction products
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
  • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
  • C10M2205/17—Fisher Tropsch reaction products
  • C10M2205/173—Fisher Tropsch reaction products used as base material
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
  • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
  • C10N2030/08—Resistance to extreme temperature

Definitions

• the present invention is concerned broadly with modifying the low temperature properties of hydrocarbon fluids and more particularly with the use of a heavy fraction of paraffinic lubes produced from a Fischer-Tropsch product as a wax crystal modifier.
• Wax crystal modifiers are additives used in the petroleum industry to improve the cold flow properties of numerous hydrocarbon fluids such as crude oils, diesel fuels, lubricating oils and the like. Basically, wax crystal modifiers function by modifying, in some way, the process by which wax crystals form in solutions when the solution temperature is lowered. For example, they may interact with paraffins in the hydrocarbon fluid to delay onset of crystallization, they may modify the morphology of the wax to a shape less likely to plug a filter or to form a gel; and they may operate to prevent fresh paraffin from adding to wax.
• wax crystal modifiers are used in lubricating oils as pour point depressants and in diesel fuels as cold filter plugging point depressants. They find use also as cloud point depressants in fuels and wax inhibitors in crude oils.
• Wax crystal modifiers commonly employed include chlorinated hydrocarbons, polyolefins and ethylene- vinyl ester copolymers.
• heavy fractions of dewaxed paraffinic lubes is meant those fractions having a final boiling point exceeding 850°F (454°C), preferably exceeding 950 0 F (51O 0 C) and even exceeding 1000 0 F (538°C) after 95 mass percent of the lube has been removed.
• the lube will be one having an initial boiling point exceeding 700°F (371 0 C).
• the heavy fraction is derived from a Fischer-Tropsch product by catalytically hydroisomerizing the product to produce a lube oil and distilling the lube oil to obtain a high boiling, heavy fraction and a lower boiling fraction.
• the process by which wax crystals form in a first paraffinic containing hydrocarbon liquid is modified by adding to it a second lube containing greater amounts by weight of a heavy fraction than the first liquid, the second lube being added in an amount sufficient to modify the wax crystal formation process of the first liquid.
• Figures 1 to 6 are graphical illustrations of various embodiments of the invention and also depict results of Examples 1 to 6 respectively.
• the wax crystal modifiers of the present invention comprise the heavy fractions of paraffinic lubes produced over dewaxing catalysts.
• paraffinic lubes include those lubes obtained from a mineral oil by hydrocracking, hydroisomerization, solvent extraction and hydroprocessing and combinations thereof, and lubes obtained from polyethylene and from Fischer-Tropsch paraffinic products.
• the heavy fraction of a paraffinic lube suitable for use as a wax crystal modifier is derived from a Fischer-Tropsch product that has been catalytically dewaxed.
• the Fischer-Tropsch product is obtained by conducting a Fischer-Tropsch process under conditions sufficient to produce products containing greater than 20 lbs. of 700°F+ (371 °C+) product per 100 lbs. CO converted and more preferably greater than 24 lbs. of 700°F+ (371°C+) product per 100 lbs. CO converted. This can be achieved by at least one of (a) the appropriate selection of process operating conditions and (b) choice of catalyst.
• the Fischer-Tropsch process is conducted at temperatures no greater than 430 0 F (221 0 C), for example, from about 330 0 F to about 430 0 F (148°C to 221°C). More preferably the reaction is conducted at no greater than 410 0 F (210 0 C).
• Operating pressures typically are in the range of from about 10 to about 600 psia, preferably from about 250 to about 350 psia, and space velocities of about 1000 to 25,000 cc/cc/hour.
• the Fischer-Tropsch process preferably is conducted in a slurry bubble column reactor.
• slurry bubble column reactor catalyst particles are suspended in a liquid and gas is fed into the bottom of the reactor through a gas distributor.
• the reactants are absorbed into the liquid and diffuse to the catalyst where they are converted to both gaseous and liquid products.
• Gaseous products are recovered at the top of the column and liquid products are recovered by passing the slurry through a filter which separates the solid catalyst from the liquid.
• Suitable Fischer-Tropsch catalysts comprise one or more Group VIII metals such as Fe, Ni, Co, and Ru on an inorganic oxide support. Additionally. the catalyst may also contain a promoter metal.
• One suitable catalyst for the process of the invention is cobalt promoted with rhenium supported on titania having a Re:Co weight ratio in the range of about 0.01 to 1 and containing about 2 to 50 wt% cobalt. Examples of such catalysts can be found in US 4,568,663; US 4,992,406; and, US 6,117,814.
• Another suitable and preferred catalyst for the Fischer-Tropsch process comprises cobalt and especially cobalt and rhenium on a support comprising primarily titania and a minor amount of cobalt aluminate.
• the support will contain at least 50 wt% titania and preferably from 80 to about 97 wt% titania based on the total weight of the support.
• About 20 to 100 wt%, and preferably 60 to 98 wt% of the titania of the support is in the rutile crystalline phase with the balance being the anatase crystalline phase or amorphous phases.
• the amount of cobalt aluminate in the binder is dependent upon the amount of cobalt and aluminum compounds used in forming the support.
• cobalt/aluminum atomic ratio greater than 0.25, preferably from 0.5 to 2, and more preferably about 1.
• the aluminum oxide is present as cobalt aluminate.
• the support will contain cobalt titanate in addition to cobalt aluminate and be essentially free of alumina.
• the support is typically formed by spray drying a suitable aqueous slurry of titania, alumina binder material and optionally silica binder material into a purged chamber with heated air at an outlet temperature of about 105 0 C to 135 0 C. Spray drying produces a spherical support with a size range of about 20 to 120 microns. This spray dried support is then calcined at temperatures in the range of 400 0 C to 800 0 C, preferably about 700 0 C.
• the calcined material is impregnated with an aqueous solution of a cobalt compound, preferably cobalt nitrate, in an amount sufficient to convert, upon calcination, at least part of the alumina to cobalt aluminate.
• a cobalt compound preferably cobalt nitrate
• the amount of cobalt compound added during the preparation of the support will correspond to an atomic ratio of Co: Al in the range of 0.25:1 to 2:1 and preferably 0.5:1 to 1 :1.
• the support produced be substantially free of alumina.
• Calcination of the cobalt impregnated support preferably is conducted in air at temperatures in the range of about 700 0 C to about 1000 0 C, preferably about 800 0 C to about 900 0 C.
• the support will have a surface area in the range of from about 5 m 2 /g to about 40 m 2 /g and preferably from 10 m 2 /g to 30 m 2 /g. Pore volumes range from about 0.2 cc/g to about 0.5 cc/g and preferably from 0.3 cc/g to 0.4 cc/g.
• the cobalt and rhenium promoter are composited with the support by any of a variety of techniques well known to those skilled in the art, including impregnation (either co-impregnation with promoters or serial impregnation — either by spray drying or by the incipient wetness techniques).
• a preferred catalyst for fixed bed Fischer-Tropsch processes is one wherein the catalytic metals are present in the outer portion of the catalyst particle, i.e., in a layer no more than 250 microns deep, preferably no more than 200 microns deep
• a preferred method of preparing the catalyst is the spray method which is described in US 5,140,050, incorporated herein by reference or in EP 0 266 898, incorporated herein by reference.
• catalysts are preferably made by incipient wetness impregnation of spray-dried supports.
• organic impregnation aids are optionally employed. Such aids are described in US 5,856,260, US 5,856,261 and US 5,863,856, all incorporated herein by reference.
• the amount of cobalt present in the catalyst will be in the range of 2 to 40 wt% and preferably 10 to 25 wt% while the rhenium will be present in weight ratios of about 1/20 to 1/10 of the weight of cobalt.
• a 450°F+ (232°C+) cut of the waxy product is separated from other hydrocarbons produced in the Fischer-Tropsch process and then is catalytically hydroisomerized.
• Suitable hydroisomerization catalysts typically include at least one Group VIII hydrogenating metal component selected from Pt, Pd, Rh, Ir and preferably at least Pt on a refractory metal oxide support, or preferably on a zeolite support.
• the catalyst typically contains from about 0.1 wt% to about 5 wt% metal. Examples of such catalysts include a noble metal, e.g., Pt on ZSM-23, ZSM-35, ZSM-48, ZSM-57 and ZSM-22.
• a preferred catalyst is Pt on ZSM-48.
• the preferred preparation of ZSM-48 is disclosed in US 5,075,269 incorporated herein by reference.
• the Pt is deposited on the ZSM-48 by techniques well known in the art such as impregnation, either dry or by incipient wetness techniques.
• Isomerization is conducted under conditions of temperatures between about 500 0 F (260°C) to about 900 0 F (482°C), preferably 550 0 F (288°C) to 725°F (385°C), pressures of 1 to 10,000 psi H 2 , preferably 100 to 2,500 psi H 2 , hydrogen gas rates of 50 to 3,500 SCF/bbl, and a space velocity in the range of 0.25 to 5 v/v/hr, preferably 0.5 to 3 v/v/hr.
• the isomerate may be distilled into cuts of various ranges.
• the heavy fraction used as a wax crystal modifier typically will have a final boiling point after 95 mass percent has been distilled off of greater than 850°F (454°C), and preferably greater than 95O 0 F (510 0 C), and even higher.
• the heavy fraction used as a wax crystal modifier may be obtained as the waxy fraction removed from a dehazed paraffinic oil.
• the waxy fraction may be removed by techniques known in the art such as filtration, precipitation, distillation, adsorption and the like.
• the heavy fraction used as wax crystal modifier is obtained by catalytically hydroisomerizing a polyethylene wax and distilling the isomerate, taking as the heavy fraction the material boiling above 1050°F (566°C).
• Low molecular weight polyethylene waxes are derived from high density polyethylene. They are hard, crystalline materials that melt to a low viscosity. They do not contain any chemical functional groups. A range of products may be obtained using different distillation conditions. Examples are the Polyflo® products available commercially from SasolWax. These polyethylene waxes may be catalytically hydroisomerized in a process similar to that described above for waxy Fischer-Tropsch feeds.
• the heavy fraction or waxy material is added to the lube to be pour point depressed in an amount sufficient to lower the pour point of the oil. Typically this will be in the range of from about 0.01 to 30 wt% based on the weight of the lube oil.
• Lube base oils that may have their pour point depressed with the additive of the invention include lube oils derived from paraffinic Fischer- Tropsch products and conventional lube oils prepared from petroleum feedstocks.
• the heavy fraction may be added to the lube to be pour point depressed without having been separated from the dewaxed paraffinic lube of which it constitutes a fraction.
• a first base lube containing some or no heavy fraction may be blended with a second lube containing an amount of a heavy fraction greater than the first lube.
• the amount of second lube blended with the first lube will be an amount sufficient to lower the pour point of the first lube.
• the amount of the second lube added to the first lube is that amount which will provide a lube blend containing between about 0.01 to 0.50 parts by weight of a heavy fraction, preferably between 0.01 and 0.30 and more preferably between 0.01 and 0.20.
• the amount of the heavy fraction in the second lube will be at least 0.10 parts by weight of the second lube, preferably 0.20 parts by weight, more preferably 0.50 and most preferably 0.70 parts by weight of the second lube.
• fractional amounts of the heavy fraction i.e., the material having a final boiling point of greater than 850 0 F (454°C) can be determined by any suitable method for determining boiling point distribution, such as, fractional distillation or by simulated boiling point distribution measurement by gas chromatographic distillation.
• the pour point was determined by test method ASTM D-5950 and the cloud point by ASTM D5773.
• the Pt/ZSM-48 catalyst used was prepared according to US 5,075,269 by adding the Pt compound by impregnation followed by calcination and reduction.
• Fischer-Tropsch wax was processed over Pt/ZSM-48 in a wide cut mode.
• a wide boiling feed fraction, nominally 430 0 F (221 0 C) plus material was hydroisomerized under conditions sufficient to reduce the pour point and cloud point of the product.
• the wide boiling product from this process was fractionated into a 730-975 0 F (388-524°C) fraction and a 975 0 F+ (524°C+) fraction.
• the pour point and cloud point for the 730-975 0 F fraction were -18 0 C and -6 0 C respectively.
• the pour point and cloud point of the 975°F fraction were -9°C and 11 0 C respectively.
• a hazy Fischer-Tropsch lube was prepared by hydroisomerization of a nominal 430 0 F (221 0 C) fraction over Pt/ZSM-48 at approximately 610 0 F (321 0 C) at 250 psig H2 and 1 LHSV. The resulting product was fractionated to produce the 1000°F+ fraction having a pour point of -5°C.
• a conventional basestock produced from catalytic dewaxing having a viscosity of 4.33 cSt and a pour point of -2O 0 C was combined with the hazy fraction of Fischer-Tropsch lube, having a pour point of -5 0 C and a cut point of 1000°F+ (538°C).
• the pour point is significantly reduced from -2O 0 C to -3O 0 C with the addition of 10% by weight of the heavy GTL lube.
• the results are shown in Fi ⁇ togu L re 2.
• a conventional petroleum derived basestock produced from catalytic dewaxing having a viscosity of 5.98 cSt and a pour point of -16 0 C was combined with a hazy fraction of Fischer-Tropsch lube, having a pour point of -5 0 C, a cloud point of 23 0 C and a cut point of 1000°F+ and prepared as described in Example 2.
• a maximum reduction in pour point from -16 0 C to of -24 0 C is obtained. The results are given in Figure 3.
• a conventional petroleum derived basestock produced from catalytic dewaxing having a viscosity of 5.98 cSt and a pour point of -16 0 C was combined with an of Fischer-Tropsch lube which had the haze selectively removed, having a pour point of -5 0 C, a cloud point of 13 0 C and a cut point of 95O 0 F+ (510 0 C).
• the maximum pour point reduction was obtained of a change from -16 0 C pour point to -21 0 C pour point.
• the cloud point in this example was increased only slightly, from -10 0 C to -7 0 C.
• Example 3 where a hazy 1000°F+ (371 0 C) oil was used for pour point depression, this example shows a smaller pour point depression response for the adsorbate de-hazed oil. The results are shown in Figure 4.
• a conventional petroleum derived basestock produced from catalytic dewaxing having a viscosity of 5.98 cSt and a pour point of -16 0 C was combined with the haze fraction removed from a sample of hazy Fischer-Tropsch lube prepared as described in Example 2. Before de-hazing the lube had a pour point of -5 0 C, a cloud point of 36 0 C and a cut point of 95O 0 F+ (51O 0 C). The haze removed from this lube had a cloud point of 5O 0 C and a pour point above room temperature. The results are given in Figure 5.
• Polyethylene wax with a MW of 1100 and a melting point of approximately 110 0 C was converted in a batch reactor over a ZSM-48 catalyst for 2 hours at 655°F (346°C) at 500 psig hydrogen.
• the product produced from this catalytic reaction had the following boiling distribution.
• the isomerate product contains 67% 700°F+ (371°C+) material.
• the total liquid product from this process had a pour point of -3°C and a cloud point of 36.4°C.
• This entire boiling range product was added to a conventional petroleum derived basestock produced from catalytic dewaxing having a viscosity of 5.98 cSt and a pour point of -16 0 C.
• the results of these blends are shown in Figure 6.
• the pour point of the resulting blend is significantly depressed relative to the starting base stock.
• this material has a lower initial boiling point, it is predominately 700 0 F (371 0 C) material. This concentration of heavy lube present in this wide boiling isomerate is sufficient to achieve the desirable pour point reduction response.

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• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Lubricants (AREA)

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• 2006
  • 2006-03-14 US US11/374,726 patent/US20060219597A1/en not_active Abandoned
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