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
  • C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
• • 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
  • C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
• • 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
  • C10G7/00—Distillation of hydrocarbon oils
  • C10G7/10—Inhibiting corrosion during distillation
• • 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
  • C10G75/00—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general
  • C10G75/04—Inhibiting corrosion or fouling in apparatus for treatment or conversion of hydrocarbon oils, in general by addition of antifouling agents
• • 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
  • C10L1/22—Organic compounds containing nitrogen
• • C—CHEMISTRY; METALLURGY
  • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
  • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
  • C23F14/00—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes
  • C23F14/02—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes by chemical means
• • 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
  • C10L1/22—Organic compounds containing nitrogen
  • C10L1/222—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond
  • C10L1/223—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen single bond having at least one amino group bound to an aromatic carbon atom
• • 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
  • C10L1/22—Organic compounds containing nitrogen
  • C10L1/228—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen double bond, e.g. guanidines, hydrazones, semicarbazones, imines; containing at least one carbon-to-nitrogen triple bond, e.g. nitriles
  • C10L1/2283—Organic compounds containing nitrogen containing at least one carbon-to-nitrogen double bond, e.g. guanidines, hydrazones, semicarbazones, imines; containing at least one carbon-to-nitrogen triple bond, e.g. nitriles containing one or more carbon to nitrogen double bonds, e.g. guanidine, hydrazone, semi-carbazone, azomethine
• • 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
  • C10L1/22—Organic compounds containing nitrogen
  • C10L1/234—Macromolecular compounds
  • C10L1/236—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives thereof
  • C10L1/2366—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds derivatives thereof homo- or copolymers derived from unsaturated compounds containing amine groups
• • 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
  • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
  • C10M2207/08—Aldehydes; Ketones
• • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
  • C10M2215/064—Di- and triaryl amines
• • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
• • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2217/02—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2217/022—Macromolecular compounds obtained from nitrogen containing monomers by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an amino group
• • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

• ABSTRACT polymer 2. A minor amount of at least one Schiffs base condensate derived from condensing hydroxylated aromatic aldehyde with aliphatic amines containing two to six carbon atoms, and 3. A minor amount of at least one diarylamine.
• this invention relates to novel compositions useful as fouling inhibitors in the processing and treatment of petroleum derived products.
• antifouling compositions which, at low concentration levels, would stabilize incipient polymer-forming hydrocarbons during storage and use, which would be capable of dispersing and which are capable of inhibiting fouling materials already formed to prevent their agglomeration so that they remain suspended in the streams rather than form deposits upon the metal surfaces such as heat exchangers and the like.
• these antifoulants would inhibit fouling in the full spectrum of petroleum materials ranging from crude oils through the various light, intermediate and heavy hydrocarbon distillates including lubricating distillates, gas/oils, kerosenes and the like. Antifoulant compositions possessing this unusual combination of properties would represent a useful advance in the art.
• Another object of this invention is the development of a multicomponent antifoulant composition whose total antifouling activity is substantially greater than the sum of the activities of the individual components used alone.
• a more specific object is to provide an antifouling composition which can substantially extend the operational life of processing, refining and/or storage equipment coming in contact with hydrocarbon stocks or streams at elevated temperatures.
• a material ultimately derived from petroleum treating or refining operations is treated with a composition defined below, using treatment methods of the art until an antifouling amount is present in the material.
• the material which then can be refined or processed in the usual manner willl then provide a substantial inhibition of fouling compared to the untreated petroleum material.
• compositions of this invention consist of as essential components:
• a hydrocarbon liquid to be treated is contacted with from about 7 to 35 parts per million (2 to l0 pounds per thousand barrels) of an admixture of:
• a metli'acrylic co-, ter-, or tetrapolymer containing basic amino nitrogen atoms prepared by polymerizing at least one amine-free, polymerizable ethylenically unsaturated alkyl methacrylate monomeric component with at least one basic amino containing dialkylaminoalkyl methacrylate component, the ratio of the alkyl methacrylate monomer to allcylaminoalkyl methacrylate monomer in the polymer ranges from about 10:1 to 25:1 and 2.
• At least on Schiffs base aliphatic-polyamine condensate selected from the group consisting of N,N'- disalicylidene, alkane diamines and their mixtures, wherein said alkane moiety contains two to six carbon atoms, and
• At least one diarylamine selected from the group consisting of diphenylamine, phenyl-a-naphthylamine and mixtures thereof, said ratio of the methacrylic polymer to the total nitrogen containing additives ranging from about 1:1 to about 1011.
• These polymers when prepared as described in U.S. Pat. No. 2,737,452 are addition-type polymers containing a plurality of polymerizable ethylenically unsaturated components, at least one of which is amine-free and desirably contains from about eight to 18 carbon atoms in an aliphatic hydrocarbon chain, which, though in the polymer, is not part of the main polymer chain, desirably is predominantly straight chain in nature, and another ethylenically unsaturate monomeric compound, which, as it exists in the polymer, is amine-containing and located in the side chain, said polymer most desirably contains from about 0.1' percent to about 3.5 percent by weight of said additiontype polymer as basic amino nitrogen.
• the preferred oil-soluble basic amino nitrogen addition type of polymers are those selected from the group consisting of co-, terand tetrapolymers containing in polymerized form at least one amine-free, polymerizable ethylenically unsaturated alkyl methacrylate monomer-containing from about four to about 18- carbon atoms and at least one basic amino containing dialkylaminoalkyl methacrylate monomer, wherein the alkyl moieties contain from one to six carbon atoms and the ratio of said alkylmethacrylate to said dialkylaminoalkyl methacrylate 'monomer ranges from about 1011 to about 25:1, said alkylmethacrylate polymer containing from about 0.1 percent to about 3.5 percent by weight of basic amino nitrogen.
• Illustrative amine free monomers which can be used include the alkyl methacrylates, such as butyl methacrylates, pentyl methacrylates, hexyl methacrylates, heptyl methacrylates, octyl methacrylates, decyl methacrylates, stearyl methacrylate, lauryl methacrylate as well as their mixtures.
• alkyl methacrylates such as butyl methacrylates, pentyl methacrylates, hexyl methacrylates, heptyl methacrylates, octyl methacrylates, decyl methacrylates, stearyl methacrylate, lauryl methacrylate as well as their mixtures.
• Methacrylic monomers containing basic amine nitrogen-containing components which can be used include diethyl aminopropyl methacrylate, dimethylaminoethyl methacrylate, the propylaminoethyl methacrylates and the butylaminobutyl methacrylates as well as their aromatic counterparts.
• the latter includes phenylarninomethyl methacrylate and tosylaminoethyl methacrylate.
• Illustrative useful oil soluble methacrylate polymers include copolymers such as. n-octyl methacrylatediethylaminoethyl methacrylate, decyl methacrylatediethylaminoethyl methyacrylate, ethyl methacrylatediethylamino-methacrylate, la'uryl methacrylatediethylaminoethyl methacrylate, tridecyl methacrylatedimethylaminoethyl methacrylate and the like, terpolymers such as lauryl methacrylate-methacrylanilidediethylaminoethyl methacrylate, decyl methacrylatemethacrylanilide-diethylaminoethyl methacrylate, and
• aromatic aldehydes particularly those con-' taining active hydroxyl groups with aliphatic polyamines
• ALIPHATIC POLYAMINES Ethylenediamine, 1,2-propylenediamine, 1,3- propylenediamine, l,6-hexamethylenediamine, 1,10- decamethylenediamine, diethylenetriamine, triethylenetetramine, pentaerythrityltetramine and the like.
• ILLUSTRATIVE DIARYLAMINES These amines comprise compounds which contain at least one amino group attached to at least one aromatic radical.
• Illustrative compounds include among others, diphenylamine, phenyl -a-naphthylamine as well as mixtures of these amines.
• oil'soluble polymers and nitrogen-containing additives function"satisfactorily as antifoulants, as is the case in any large group certain individual members of the group function more effectively than the group at large and are therefore preferred.
• the following two methacrylate tetrapolymers used in the indicated proportions in conjunction with the specific Schiffs base condensate of salicylaldehyde and the lower polyamines such as ethylene and propylenediamine and diphenylamine represent the preferred compositions.
• tetrapolymer selected from the group consisting of (a) the tetrapolymer of butyl methacrylate-lauryl methacrylatestearyl methacrylate-dimethylaminoethyl methacrylate, and (b) butyl methacrylate-isodecyl methacrylatestearyl methacrylate and dimethylaminoethyl methacrylate, combined with 1 part by weight of N,N'disalicylidene 1,2-propane diarnine and 2 parts by weight of diphenylamine.
• the inventive antifoulants can be employed in crude petrolum streams as well as in the treatment of components of products derived from crude petroleum.
• These include light distillates such as light naphthas, intermediate naphthas, heavy naphthas, middle distillates such as kerosene, gas oil, distillate lube stocks, for example, white oil, saturating oil, light lubes, medium lubes and heavy lubes.
• Further petroleum substrates include refined hydrocarbons such as xylene, benzene, etc., and, in some instances in the processing of nonhydrocarbons such as alcohols, phenols, etc.
• the amount of antifouling agent required for effective inhibition is a variable dependent upon the source of the petroleum substrate treated, e.g., a sour crude or a highly refined xylene, the temperatures and pressures employed as well as the components of the antifouling compositions used.
• the source of the petroleum substrate treated e.g., a sour crude or a highly refined xylene
• the temperatures and pressures employed as well as the components of the antifouling compositions used e.g., a sour crude or a highly refined xylene
• a convenient mode of expressing the concentrations required is in the form of a range either expressed as parts by million of stock treated (P.P.M.) or on the basis of pounds of composition added per thousand barrels of stock (P.T.B.). Satisfactory inhibition of fouling in most feedstock streams can be obtained under practically all conditions encountered between about 1 to 50 pounds of antifoulant per thousand barrels of stock, or about 3.5 to 175 P.P.M. when expressed in parts per million. Lower concentrations tend toward erratic results and higher concentrations are limited by cost. A narrow concentration range of from about 2 to PTB (7-35 PPM.) is more usually employed.
• the ratio of oil soluble polymer to nitrogen containing additive ranges between 1:1 to about 10:1.
• concentrations and ratios are herein referred to as an antifouling or inhibiting amount of antifoulant.
• the components can be applied individually or as an admixture.
• Compatible solvents may be a convenience in handling the relatively small quantities of material but the antifoulants can be added directly without dilution.
• the antifouling compositions can be applied batchwise or continuously. In the latter instance a proportioning pump or comparable device may be used to inject the compositions into the stream being treated.
• V Evaluation of fouling Two general methods are employed, actual refinery use or simulated use. In the plant trials the length of time that a given unit can be operated without the need for defouling maintenance is noted and compared to the average run of a comparable unit untreated. Also noted are the heat transfer values of the unit toward the end of an operating cycle.
• the procedure designated as the CFR Coker Test is employed.
• ASTM D4660 ASTM D4660
• the tendency of a treated stock material to deposit a fouling coating in a preheater or heat exchanger tube at an elevated temperature is noted and compared to the behavior of an untreated stock under the same conditions.
• the filtered stock under test is charged at a 6 lbs. per hour flow rate over an electrically heated preheater tube which heats the test fraction to a specified temperature, usually about 425 F.
• the sample is passed thru a sintered, stainless steel filter, electrically heated to about 500 F.
• the test is conducted for 300 minutes or until the pressure drop across the filter reaches 25.0 inches of mercury. The latter occurs when a substantial quantity of oil insoluble material clogs the filter and causes the pressure drop to the arbitrarily chosen 25.0 inches limit.
• EMBODIMENT A PREPARATION OF A PREFERRED METHACRYLIC POLYMER To a reaction kettle equipped with a means of providing stirring, heating, cooling inert atmosphere is added 4,200 parts by weight of butyl methacrylate and 22 parts by weight of azobisisobutyronitrile. The mixture is stirred until dissolved and 800 parts by weight of dimethylaminoethyl methacrylate, 10,600 parts by weight of lauryl methacrylate and 4,400 parts by weight stearyl methacrylate are added with stirring. At this time 28,600 parts by weight of refined paraffin distillate (150 SU viscosity at 100 F.) is added to the mixture and the reaction mixture is purged with nitrogen gas while stirring for about one-half hour.
• refined paraffin distillate 150 SU viscosity at 100 F.
• EMBODIMENT B PREPARATION OF ANOTHER PREFERRED METHACRYLIC POLYMER
• the same precedure used to prepare the methacrylic polymer of Embodiment A is followed, the only difference being in the use of isodecyl methacrylate instead of lauryl methacrylate.
• the same catalyst is employed.
• the quantities (by weight) of the 4- monomers that are used appear below:
• reaction mixture is refluxed for 4 hours then percolated through silica gel. At this time volatiles are stripped off leaving a yellow to amber oil which slowly crystallizes to a yellow glassy solid. Elemental analysis confirms that the desired amide is present.
• nents of the anti-fouling composition is evaluated in the previously described CFR Coker Test to seemingly comparable multi-component antifouling compositions at comparable concentration.
• the base kerosene charge stocks employed have the following properties:
• Runs 4 and 5 show that kerosene solutions of the preferred tetrapolymer at the 2PTB and SPTB level while running the full 300 minutes did cause pressure Similarly, kerosene solutions of the N,N-disalicylidene-l,2-propane diamine (run 6) of paminodiphenylamino dioctanoate (run 7) and of diphenylamine (run 8) even at the SPTB level clog up the filter when used alone in times ranging from 62 to 100 minutes. However, deposits range from traces to small quantities. A SPTB dosage of kerosene solution of phenyl-wnaphthylamine used alone ran the full 300 minutes but gave slightly greater depositions of foulant.
• anti-fouling activity comparable to that obtained in run 10 when an equal weight of N,N- disalicylidene, 1,2-ethane diamine is substituted for N,N-disalicylidene, 1,2-propane diamine used in the original run (10).
• a process for inhibiting fouling in petroleum refining and chemical processing equipment used to process and refine petroleum derived stock material comprising the steps of treating said petroleum derived stock material with an antifouling amount of an antifouling composition comprising:
• an oil-soluble basic nitrogencontaining methacrylate-type polymer selected from the group consisting of Co-, ter-, and tetrapolymers containing a plurality of polymerizable ethylenically unsaturated components, at least one component which is amine-free and contains from about eight to 18 carbon atoms in an aliphatic chain which though in the polymer is not part of the polymer chain and at least one other ethylenically unsaturated component which as it exists in the polymer is an amine-containing dialkylaminoalkyl methacrylate monomer which is located in the said chain, said polymer containing from about 0.] percent to about 3.5 percent of its weight as basic amino nitrogen, and
• a process for inhibiting fouling in chemical processing equipment used to process and refine petroleum derived stock material comprising treating said material prior to the completion of processing and/or refining with an anti-fouling amount of a composition containing:
• diarylamine selected from the group consisting of diphenylamine, phenyl-oznaphthylamine, p-tertiary-octylphenyl-anaphthylamine, p-aminodiphenylamine and mixtures thereof.
• the tetrapolymer comprises butyl methacrylate, lauryl methacrylate, stearyl methacrylate and dimethylaminoethylacrylate, the Schiffs base condensate is N,N'-disalicylidene-l ,2- propane diamine and the diarylamine is diphenylamine.
• An antifouling composition suitable for inhibiting the fouling of petroleum derived stock material comprising:

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• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

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Citations (5)

• 1970
  • 1970-10-27 US US00084472A patent/US3772182A/en not_active Expired - Lifetime
• 1971
  • 1971-07-07 CA CA117,678A patent/CA975151A/en not_active Expired
  • 1971-09-10 DE DE19712145290 patent/DE2145290A1/de active Pending
  • 1971-10-08 GB GB4692771A patent/GB1332720A/en not_active Expired
  • 1971-10-12 ZA ZA716814A patent/ZA716814B/xx unknown
  • 1971-10-15 AU AU34656/71A patent/AU453625B2/en not_active Expired
  • 1971-10-21 BE BE774278A patent/BE774278A/xx unknown
  • 1971-10-26 FR FR7138362A patent/FR2113234A5/fr not_active Expired
  • 1971-10-27 NL NL7114767A patent/NL7114767A/xx unknown

Patent Citations (5)

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