Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2555/00—Characteristics of bituminous mixtures
  • C08L2555/30—Environmental or health characteristics, e.g. energy consumption, recycling or safety issues
  • C08L2555/34—Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2555/00—Characteristics of bituminous mixtures
  • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
  • C08L2555/60—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2555/00—Characteristics of bituminous mixtures
  • C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
  • C08L2555/60—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye
  • C08L2555/70—Organic non-macromolecular ingredients, e.g. oil, fat, wax or natural dye from natural non-renewable resources
  • C08L2555/74—Petrochemicals other than waxes, e.g. synthetic oils, diesel or other fuels, hydrocarbons, halogenated or otherwise functionalized hydrocarbons

Definitions

• the present invention belongs to the field of bitumens, in particular intended for road construction or civil engineering.
• the present invention relates to a composition of bitumen bases comprising a first bitumen base and an oil resulting from the pyrolysis of plastic or from the hydrothermal liquefaction of plastic whose initial boiling point is at least 300° C. and its method of preparation .
• the present invention also relates to the use of a plastic liquefaction oil, and in particular of a plastic pyrolysis oil, in a bitumen.
• Bitumen is the main hydrocarbon constituent used in the field of road construction or civil engineering.
• a bitumen can be defined as being a mixture of several “bitumen bases”. Two or more bitumen bases can be mixed to form a composition of bitumen bases.
• a composition of bitumen bases can form a bitumen. Two or more compositions of bitumen bases can also be mixed to obtain a bitumen.
• bitumen In order to produce “bitumen bases”, so-called “bitumen” crudes are usually selected according to their ability to produce said bases. Thus, among all the crude oils referenced, only less than 10% make it possible to produce “bitumen bases”. Said bases are generally obtained from residues resulting from the distillation of atmospheric and/or vacuum crude oil. The main selection criteria for bitumen crudes are:
• bitumen bases resulting from these crudes penetrability, viscosity, softening point (TBA), etc.
• bitumen from bitumen crudes thus requires operating the units for a determined period and adapting them to these particular crudes, which increases the operational costs.
• bitumen bases It is also known to use additives in bitumen bases, the objective then being to be able to adapt the technical characteristics of the bitumen bases. However, these additives increase the production cost of bitumen bases.
• bitumens To be able to be used in the field of road construction or civil engineering, bitumens must have certain physico-chemical properties. One of the most important properties is the variation of TBA; this must be low enough to avoid premature aging of the bitumen.
• a first way is to blow the bitumen.
• the main objective of blowing a bitumen is to reduce its thermal susceptibility, i.e. to increase the penetrability index (or Pfeiffer index) of the blown bitumen compared to the starting bitumen.
• the blowing operation has the effect of hardening the bitumen treated by oxidation.
• a blown bitumen has a ring and ball softening temperature (TBA) higher than that of the starting bitumen and a needle penetrability (P25) of the same order of magnitude as that of the starting bitumen.
• TBA ring and ball softening temperature
• P25 needle penetrability
• Blown bitumens are made in a blowing unit, by passing a stream of air and/or oxygen through the bitumen that you want to harden.
• This operation can be carried out in the presence of an oxidation catalyst, for example polyphosphoric acid.
• an oxidation catalyst for example polyphosphoric acid.
• the blowing is carried out at high temperatures, of the order of 200 to 300°C, for relatively long periods typically between 30 minutes and 2 hours, continuously or in batches. This blowing process has a number of drawbacks:
• Blown bitumens are more sensitive to aging than starting bitumens.
• blown bitumens are generally more fragile when cold than the starting bitumen. This can be explained by the fact that the blowing has the effect of hardening the bitumen.
• plastic waste It is known to recover plastic waste by using it as an initial charge in chemical processes (gasification, pyrolysis, hydrothermal liquefaction, depolymerization, dissolution) or in mechanical processes (grinding). In the initial charge, plastic waste can also be combined with biomass waste.
• High temperature pyrolysis processes or hydrothermal liquefaction processes make it possible to transform plastic waste into several products in varying proportions depending on the nature of the waste used: an oil, a gaseous mixture, coke.
• the oil resulting from the pyrolysis of plastic or from hydrothermal liquefaction can then be separated into several cuts by any type of separation process known per se:
• VGO Vacum Gasoil
• a very heavy cut type VR (Visco-Reduced) with an initial point boiling point of at least 450° C. and a density of between 840 Kg/m 3 and 870 Kg/m 3 .
• Document WO2019/109093 describes a process for modifying an asphalt using a fraction of a tire pyrolysis oil having a reduced content of polycyclic aromatic hydrocarbons.
• This document describes modifying an asphalt by adding thereto from 0.5 to 30% m/m of a tire pyrolysis oil containing 100 ppm or less of polycyclic aromatic hydrocarbons and having a solids content of less than 5% m/m .
• the effect on aging presented in this document relates to compositions mixing from 1.9 to 7.4% of solids resulting from the pyrolysis of tires, from 2.3 to 9% of oil from pyrolysis of tires, the remainder being made of asphalt.
• plastic liquefaction oil and in particular plastic pyrolysis oil, whose initial boiling point measured according to the ASTM D7169:20 standard is at least 300 ° makes it possible to produce compositions of bitumen bases and therefore bitumens, in particular road bitumens, having improved properties in terms of variation of TBA.
• This improvement has the advantage of avoiding premature aging of the bitumen by incorporating plastic liquefaction oil, and in particular plastic pyrolysis oil, whose initial boiling point is at least 300°C.
• this incorporation makes it possible to recover heavy cuts whose initial boiling point is at least 300°C and which are not easily recoverable.
• plastic liquefaction oil and in particular of plastic pyrolysis oil, whose initial boiling point is at least 300° C. as a component of a bitumen, makes it possible to obtain a property particularly sought after in a composition of bitumen bases: the variation of TBA.
• plastic liquefaction oil and in particular plastic pyrolysis oil, makes it possible to lower the variation in the softening point of an aged bitumen base.
• This reduction in the variation of the softening point also expressed as the gain in softening point compared to the bitumen base alone, can be 10 to 30%, in particular from 10 to 25%, in particular from 13 to 22%.
• Bitumen base or base according to the invention, a bitumen base or base is considered to be the product resulting from a refining process (atmospheric distillation, vacuum distillation, etc.). It is an unfinished product in the sense that several bitumen bases are mixed to form a bitumen.
• a bitumen base can be produced by refining a crude oil, in particular a bitumen crude, which is heated to 300° C., partially vaporized in a furnace and transferred to an atmospheric distillation column in which its operates the separation of the different fractions.
• the lighter ones vaporize while the heavier ones (atmospheric residue) remain at the bottom of the column and pass through a second heat exchanger before treatment in a vacuum distillation column.
• the bitumen base is recovered at the bottom of this vacuum distillation column.
• the bitumen base corresponds for example to the 560°C+ cut from vacuum distillation.
• bitumen bases treated or not after vacuum distillation, are usually mixed to form a bitumen with desired properties such as hardness.
• Bituminous binder or bitumen this term defines a finished product which is a mixture of several bitumen bases. This mixture of several bitumen bases makes it possible to formulate a bituminous binder in order to obtain the desired property relating to a particular use.
• Categorization of road bitumens according to their properties and according to standardized measures, it is possible to classify road bitumens into six groups of road applications: • Category 1 - So-called pure bitumens, ie not modified by additives or polymers. They are used for the construction and maintenance of road pavements or paved pavements.
• the grades belonging to this category 1 are grades 20/30, 35/50, 50/70, 70/100 and 160/220, classified according to their penetrability at 25°C (measured according to the method EN 1426:2018) and their TBA softening points (EN1427:2018 standard), respectively 55-63, 50-58, 46-54, 43-51 and 35/43.
• grade X/Y bitumen has a penetrability at 25°C of X.10 1 to Y.10 -1 mm.
• Category 2 Hard grade road bitumen.
• the grades belonging to this category 2 are grades 10/20, 15/25 and 5/15 classified according to their penetrability at 25°C (according to the EN 1426:2018 method) and their softening points TBA (EN1427:2018 standard), respectively 58-78, 55-71, 60-76.
• These grades correspond, for example, to the grades of bitumen subject to the specifications of standard NF EN 12594:2014
• Category 3 Multigrade 2 paving bitumens.
• the grades belonging to this category 3 are grades 20/30, 35/50, 50/70, classified according to their penetrability at 25°C (according to the method EN 1426:2018) and their softening points TBA (standard EN1427:2018), respectively 54-63, 57-66, 63-72.
• These grades correspond, for example, to the grades of bitumen subject to the specifications of standard NF EN 12594:2014.
• Bitumens modified by polymers are, for example, subject to the specifications of standard NF EN 14023:2010.
• bitumens • Category 6 - Fluxed or liquefied bitumens. These bitumens are, for example, subject to the specifications of standard NF EN 15322:2013.
• liquefaction oil is meant an oil resulting from a pyrolysis process and/or of a hydrothermal liquefaction process of a hydrocarbon charge.
• This hydrocarbon charge may comprise plastics, and optionally biomass, in particular in the form of waste.
• a liquefaction oil can be formed from a mixture of two or more liquefaction oils originating from the liquefaction of different hydrocarbon feedstocks (plastic waste and biomass).
• plastic pyrolysis oil or "plastic pyrolysis oil” can be used interchangeably and refer to the liquid products obtained after plastic waste has been thermally pyrolyzed.
• the pyrolysis process should be understood as a non-selective thermal cracking process. Pyrolysis involves the breaking of polymer chains by heating at moderate temperatures (about 400 to 600°C). Rather than breaking down the polymer into its original monomers, pyrolysis tends to produce a range of shorter chain compounds, similar in many ways to the mixtures of hydrocarbons found in crude oil and petroleum products. A catalyst is sometimes used to reduce the operating temperature.
• the plastic to be pyrolyzed can be of any type.
• the plastic to be pyrolyzed can be polyethylene, polypropylene, polystyrene, polyesters, polyamides, polycarbonates, etc.
• Plastic pyrolysis oil typically contains paraffins, i-paraffins (iso-paraffins), dienes, alkynes, olefins, naphthenes and aromatic components.
• Plastic pyrolysis oil may also contain impurities such as organic chlorides, organic silicon compounds, metals, salts, sulfur and nitrogen compounds, etc.
• the origin of the plastic leading to the plastic pyrolysis oil is the plastic waste without limitation on the origin or the nature of the plastic.
• the composition of plastic pyrolysis oil depends on the type of pyrolyzed plastic.
• plastic waste can also be combined with biomass waste.
• the biomass content in the initial charge can be between 0 and 20% by weight.
• the oil resulting from the pyrolysis of plastic can thus contain biomass.
• a hydrothermal liquefaction oil refers to the liquid products obtained by a thermochemical conversion process using water as a solvent, reactant and catalyst for the degradation reactions of a hydrocarbon feed, the water being typically in a subcritical state. or supercritical.
• the hydrothermal liquefaction process is typically carried out at a temperature of 250 to 500°C and at pressures of 10 to 25-40 MPa in the presence of water.
• a plastic hydrothermal liquefaction oil results from the treatment of any type of plastic, in particular those mentioned for plastic pyrolysis oil.
• plastic waste can also be combined with biomass waste.
• the biomass content in the initial charge can be between 0 and 20% by weight.
• the oil resulting from the hydrothermal liquefaction of plastic can thus contain biomass.
• composition of a plastic hydrothermal liquefaction oil is similar to that of a pyrolysis oil.
• boiling point refers to the boiling point generally used in the oil and gas industry. Boiling points are measured at atmospheric pressure. The initial boiling point is defined as the temperature value when the first bubble of vapor is formed. The final boiling point is the highest temperature that can be reached during standard distillation. At this temperature, no more vapor can be drawn into the condensing units. The determination of the initial and final boiling point is known per se. Depending on the boiling range of the mixture, they can be determined using various standardized methods such as, for example, the ASTM D2887:2019 standard relating to the distribution of the boiling range of petroleum cuts by gas chromatography. For compositions containing heavier hydrocarbons, ASTM D7169:2020 or D2892-20:2020 may also be used. Boiling ranges of distillates can also be advantageously measured using ASTM D7500:2019.
• the present invention consists in providing a bitumen base composition
• a bitumen base composition comprising a conventional bitumen base a) (other than a plastic pyrolysis oil and/or a plastic hydrothermal liquefaction oil) whose initial boiling point is at least 300°C) mixed with at least one plastic liquefaction oil b) whose initial boiling point is at least 300°C measured according to standard D7169:20.
• the plastic liquefaction oil can be a plastic pyrolysis oil, a hydrothermal plastic liquefaction oil or a mixture of the two, in particular a plastic pyrolysis oil.
• Bitumen base used in the present invention has a penetrability at 25° C. measured according to standard EN1426:2018 of less than or equal to 220.10 -1 mm and a point of softening measured according to standard EN1427:2018 greater than or equal to 35°C.
• This bitumen base can be a usual bitumen base produced by refining a so-called “bitumen” crude oil, as previously described. Bitumen crudes are heavy crudes whose "bitumen” part constitutes the densest and most viscous part.
• Bitumen crudes can come from Venezuela (Boscan, Ba Ceiro, Lagunillas and Tia Juana) or from the Middle East (Safaniya (or heavy Arab) and Kuwait).
• said at least one bitumen base defined in a) can be a base resulting from the atmospheric distillation and/or vacuum distillation of crude oil, in particular a so-called “bitumen” crude.
• the composition of bitumen bases according to the invention may comprise one or more of the following characteristics: - at least one bitumen base defined in a) having a penetrability at 25° C. of less than or equal to 100 .
• At least one bitumen base defined in a) having a penetrability at 25°C less than or equal to 50. 10 -1 mm and a softening point greater than or equal at 50°C, said at least one bitumen base defined in a) may have a penetrability at 25°C measured according to standard EN1426:2018 of 5.10 -1 to 220.10 -1 mm, advantageously from 10.10 -1 to 100.10 -1 mm or from 35.10 -1 to 100.10 -1 mm, for example from 5.10 -1 to 15.10 -1 mm, for example from 15.10 -1 to 25.10 -1 mm, for example from 10.10 - 1 to 25.10 -1 mm, for example from 20.10 -1 to 30.10 -1 mm, for example from 35.10 -1 to 50.10 -1 mm, for example from 50.10 -1 to 70.10 -1 mm, for example from 70.
• said at least one bitumen base defined in a) may have a softening point measured according to standard EN1427:2018 greater than or equal to 35°C or 43°C or 50°C, for example 35°C to 43°C, for example 43°C to 51°C, for example 46°C to 54°C, for example 50 to 58°C, for example 55°C to 63°C.
• the softening point may be 60°C to 78°C, for example 58°C to 78°C or 55°C to 71°C or 60°C to 76°C.
• the softening point can be from 35°C to 63°C, for example from 35°C to 43°C or from 43°C to 51°C or from 46°C to 54°C, or from 50 °C to 58°C or 55°C or 63°C.
• said at least one bitumen base defined in a) may have one of the following groups of characteristics: - a penetrability at 25° C. of 20.10 -1 to 220.10 -1 mm and a softening point greater than or equal to 35 °C, for example from 35°C to 63°C.
• said at least one bitumen base defined in a) may have one of the following groups of characteristics: a penetrability at 25° C.
• Said at least one bitumen base defined in a) may in particular belong to one of bitumen categories 1 to 6 defined above.
• Plastic liquefaction oil used in the present invention.
• said at least one plastic liquefaction oil defined in b) comes from a plastic liquefaction process, for example a hydrothermal liquefaction process or a pyrolysis process, preferably a pyrolysis process.
• the mixed plastics are placed in a pyrolysis unit also called a pyrolyzer.
• waste plastics are converted by pyrolysis into a pyrolysis product, the pyrolysis product comprising a gaseous phase (e.g. pyrolysis gases, such as C1 to C4 gases, hydrogen (H2), carbon monoxide (CO), carbon (CO2) mainly) and a liquid phase designated as plastic pyrolysis oil.
• Plastic waste can include post-consumer plastic waste, such as mixed plastic waste.
• Blended plastics can include non-chlorinated plastics (eg, polyolefins, polyethylene, polypropylene, polystyrene, copolymers, etc.), chlorinated plastics (eg, polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), etc. ), and the like, or mixtures thereof.
• plastic waste includes long chain molecules or polymeric hydrocarbons. Plastic waste can also include used tires or biomass.
• the pyrolysis unit can be any suitable reactor configured to convert waste plastics into gas-phase and liquid-phase products (eg, simultaneously).
• the reactor can be configured for gas phase, liquid phase, vapor-liquid phase, gas-solid phase, liquid-solid phase, or slurry phase operation.
• the reactor may contain one or more beds of inert material or pyrolysis catalyst including sand, zeolite, alumina, catalytic cracking catalyst, or combinations thereof.
• the pyrolysis catalyst is able to transfer heat to the components undergoing the pyrolysis process in the pyrolysis unit.
• the pyrolysis unit can operate without any catalyst (eg pure thermal pyrolysis).
• the pyrolysis unit can operate adiabatically, isothermally, non-adiabatically, non-isothermally, or combinations thereof. Pyrolysis reactions can be carried out in a single step or in several steps.
• the pyrolysis unit can consist of two reactors connected in series.
• the pyrolysis process can be divided into a first stage which is carried out in a first reactor and a second stage fluidically connected downstream to the first stage which is carried out in the second reactor.
• the pyrolysis unit may include one or more equipment configured to convert mixed plastic materials into gas-phase and liquid-phase forming products.
• the equipment(s) may or may not contain an inert material or a pyrolysis catalyst as described above. Examples of such equipment include one or more heated extruders, heated rotary kiln, heated tank type reactors, packed bed reactors, bubbling fluidized bed reactors, circulating fluidized bed reactors, empty heated vessels, closed heated surfaces where plastic flows along the wall and cracking, containers surrounded by ovens, or any other suitable equipment providing a heated surface to aid cracking.
• the pyrolysis unit can be configured to pyrolyze (eg, crack), and in some aspects (eg, when hydrogen is added to the pyrolysis unit), hydrogenate components of the plastic waste stream feeding the pyrolysis unit.
• reactions that can occur in the pyrolysis unit include, but are not limited to, isomerization of one or more normal paraffins to one or more i-paraffins, selective ring opening of one or more cycloparaffins to one or more i-paraffins, cracking of molecules at long-chain to short-chain molecules, removal of heteroatoms from hydrocarbons containing heteroatoms (eg, dechlorination), hydrogenation of coke generated in the process, or combinations thereof.
• a headspace purge gas may be used in all or part of the pyrolysis stage(s) (conversion of waste plastics into products forming a liquid phase and/or a gas) to enhance the cracking of plastics, to produce valuable products, or to provide feed for steam cracking, or combinations thereof.
• the headspace purge gas may include hydrogen (H2), C1 to C4 hydrocarbon gases (e.g., alkanes, methane, ethane, propane, butane, isobutane), inert gases (e.g. nitrogen (N2), argon, helium, steam), or combinations thereof.
• Headspace purge gas aids in dechlorination in the pyrolysis unit, when the plastic waste includes chlorinated plastics.
• Headspace purge gas may be introduced into the pyrolysis unit to aid in the removal of entrained volatiles from the mixed and molten plastics present in the pyrolysis unit.
• a stream containing hydrogen (H2) can be added to the pyrolysis unit to enrich the environment of the pyrolysis unit with H2 and thus help to remove hydrogen chloride trapped in the pyrolysis unit and providing a local hydrogen-rich environment in the melt or pyrolysis liquid, or combinations thereof; for example via a stream containing I ⁇ 2 supplied directly to the pyrolysis unit independently of the stream of plastic waste.
• H2 can also be introduced with the flow into the pyrolysis unit, with adequate safety measures related to the handling of hydrogen with a plastic charge.
• the pyrolysis unit can facilitate any reaction of the components of the plastic waste stream in the presence of or with hydrogen. Reactions can occur, such as the addition of hydrogen atoms to double bonds of unsaturated molecules (eg, olefins), resulting in saturated molecules (eg, paraffins, i-paraffins, naphthenes ). Additionally or alternatively, the reactions in pyrolysis unit can cause a bond to break in an organic compound, with subsequent reaction and/or replacement of a heteroatom by hydrogen.
• unsaturated molecules eg, olefins
• saturated molecules eg, paraffins, i-paraffins, naphthenes
• the use of hydrogen in the pyrolysis unit can have beneficial effects on i) the reduction of coke resulting from cracking, ii) the maintenance of the catalyst used (if any) in the process in an active state, iii) improving chloride removal from the stream such that the pyrolysis product from the pyrolysis unit is significantly dechlorinated compared to the plastic waste stream, thereby minimizing chloride removal requirements in the units downstream of the pyrolysis unit, iv) hydrogenation of olefins, v) reduction of diolefins in the pyrolysis product, vi) assistance in the operation of the pyrolysis unit at reduced temperatures for the same levels of conversion of the plastic waste stream in the pyrolysis unit, or combinations of i) to vi).
• the pyrolysis processes in the pyrolysis unit can be low severity or high severity.
• Low severity pyrolysis processes may occur at a temperature below about 450°C, preferably 250°C to 450°C, preferably 275°C to 425°C, or preferably 300°C to 400° C., and can produce a pyrolysis oil rich in mono-olefins and di-olefins, for example at least 15% by weight, as well as a significant amount of aromatics, for example at least 10% by weight.
• High severity pyrolysis processes may occur at or above about 450°C, preferably 450°C to 750°C, preferably 500°C to 700°C, or preferably 550°C. C to 650°C, and can produce aromatic-rich pyrolysis oil, as well as more gaseous products (compared to low-severity pyrolysis).
• a pyrolysis product can be recovered as an effluent from the pyrolysis unit and routed (eg, drained, eg, by pumping, gravity, differential pressure, etc.) to a separation unit.
• the pyrolysis product can be separated in the separation unit into a pyrolysis gas stream and a pyrolysis plastic oil.
• the separation unit may include any suitable gas-liquid separator, such as vapor-liquid separator, oil-gas separators, gas-liquid separators, deaerators, scrubbers, traps, flash drums, balloons compressor suction fans, gravity separators, centrifugal separators, filter vane separators, anti-fog pads, liquid-gas coalescers, distillation columns and the like, or combinations thereof.
• the oil from the pyrolysis of plastic obtained as described above can be separated into several cuts:
• VGO Vacum Gasoil
• the VGO (Vaccum Gasoil) type heavy cut with a distillation range of between 300° C. and 450° C. and a density of between 800 Kg/m 3 and 840 Kg/m 3 .
• a very heavy cut of the VR (Visco-Reduced) type with an initial boiling point of at least 450° C. and a density of between 840 Kg/m 3 and 870 Kg/m 3 .
• waste plastics can be treated in a hydrothermal liquefaction unit to obtain plastic hydrothermal liquefaction oil which can then be separated into several cuts, as described above.
• the plastic liquefaction oil b) according to the invention obtained by pyrolysis or hydrothermal liquefaction
• whose initial boiling point is at least 300° C. measured according to standard D7169:20 is typically obtained by distillation and is therefore generally free of solids.
• the plastic liquefaction oil b) according to the invention and whose initial boiling point is at least 300° C. measured according to standard D7169:20, can be derived from a plastic pyrolysis oil obtained by a plastic pyrolysis process as described above and/or a plastic hydrothermal liquefaction oil obtained by a hydrothermal liquefaction process as described above.
• the plastic liquefaction oil and in particular the plastic pyrolysis oil, can have an initial boiling point of at least 370° C. measured according to standard D7169:20.
• the plastic liquefaction oil and in particular the plastic pyrolysis oil, can have an initial boiling point of at least 390° C. measured according to standard D7169:20.
• the plastic liquefaction oil and in particular plastic pyrolysis oil, may have an initial boiling point of at least 450° C. measured according to standard D7169:20.
• composition of bitumen bases comprising at least: a. from 95 to 99% by weight of at least one bitumen base having a penetrability of
• composition of bitumen bases according to the invention may comprise at least: a) from 98 to 99% by weight of at least one bitumen base as defined in a), b) from 1 to 2 % by weight of at least one plastic liquefaction oil, and in particular of at least one plastic pyrolysis oil, as defined in b).
• the at least one base defined in a) and the at least one plastic liquefaction oil, and in particular the at least one pyrolysis oil, defined in b) can each have one of the characteristics or groups of characteristics previously defined.
• composition of bitumen bases may comprise from 1 to 5% by weight, for example from 1 to 2% by weight, of at least one plastic liquefaction oil, and in particular of at least one plastic pyrolysis oil , whose initial boiling point is at least 300°C measured according to standard D7169:20.
• bitumen base composition according to the invention may consist of one or more bitumen bases as defined in a) and one or more plastic liquefaction oils, and in particular one or more plastic pyrolysis oils , as defined in b).
• bitumen base composition according to the invention may consist of a single bitumen base as defined in a) and a single plastic liquefaction oil, and in particular a single plastic pyrolysis oil, such as as defined in b).
• the composition of bases bitumen according to the invention does not comprise any added third solid component.
• the composition of bitumen bases according to the invention may have a solids content of less than 1.9% by mass, in particular less than 1.5% by mass, preferably less than 1% by mass, more preferably less than 0.5% by mass, more preferably less than 0.1% by mass.
• the composition according to the invention does not contain solids.
• composition of bitumen bases according to the invention can be produced by simple mixing of the bitumen bases defined in a) and b), in particular with stirring, at a temperature sufficient to ensure a homogeneous mixture of these bases. This temperature is generally 70° C. above the softening point of each of the bases (bitumen base and plastic pyrolysis oil).
• the bitumen base defined in b) can be preheated for at least 2 hours at a temperature below 120°C to prevent the formation of sediment.
• a composition of bitumen bases is thus obtained, the variation in the softening point of which is less than the variation in the softening point of component a) following aging according to the RTFOT test of standard NF EN 12607-1 [2014]
• this variation may be lower by 10 to 30%, in particular by 10 to 25%, in particular by 13 to 22%.
• the invention also relates to the use of a plastic liquefaction oil, and in particular a plastic pyrolysis oil, having an initial boiling point of at least 300° C. measured according to standard D7169:20 as component for road bitumen. This use makes it possible to lower the variation of the softening point of an aged bitumen base in accordance with the RTFOT test standard EN12607-1 [2014]
• the invention relates in particular to the use of a plastic liquefaction oil, and in particular a plastic pyrolysis oil, having an initial boiling point of at least 300° C., preferably of at least 370 ° C, preferably at least 400° C., preferably at least 450° C. resulting from a plastic liquefaction process, and in particular from a plastic pyrolysis process, as a component for road bitumen.
• a plastic liquefaction oils in particular several plastic pyrolysis oils, whose initial boiling point is at least 300° C. can also be used.
• the liquefaction oil, in particular the pyrolysis oil can be as previously defined. As previously described, this plastic liquefaction oil, and in particular this plastic pyrolysis oil, then forms a bitumen base which can be used to produce a road bitumen.
• bitumen base in particular a road bitumen base
• at least one plastic liquefaction oil and in particular at least one plastic pyrolysis oil, as defined above
• at least one base bitumen as defined above
• Table 1 Four bitumen bases corresponding to base a) according to the invention were used. They were obtained according to methods well known per se and as described above. Their characteristics are shown in Table 2 below.
• the base a) according to the invention is preheated in a ventilated oven at 130°C.
• the preheating time is estimated at 1h30.
• Base b) according to the invention was preheated for 2 hours at a low temperature of 110° C. to prevent the formation of sediment.
• the mixture is heated by a “balloon heater” system with electrical resistance, thermostat and thermo-coupled PT100 temperature probe.
• Agitation is carried out by a “Rayneri” type system which is a metal centripetal turbine coupled to an agitation system.
• the mixture is heated to 160° C. with stirring (250-300 rpm) for a period of 30 minutes so as to obtain a homogeneous mixture.
• Table 4 Mixtures made with base A grade 70/100
• Table 5 Mixtures made with bases C, D and E of grade 35/50
• mixtures 1 to 5 show that it is possible to incorporate a plastic pyrolysis oil B with an initial boiling point of 450°C without degrading the properties of the bitumen.
• Compounds 1, 3, 4 and 5 have properties that comply with the mandatory properties expected by specification EN 12591 both in terms of penetrability at 25°C and softening point (TBA).
• plastic pyrolysis oil b) with an initial boiling point of 450°C (base B) or plastic pyrolysis oil with an initial boiling point of 370°C (base F ) can bring a reserve with respect to the specification of variations of TBA, that is to say a gain in TBA, which can be likened to a booster effect.
• base B initial boiling point of 450°C
• base F plastic pyrolysis oil with an initial boiling point of 370°C
• plastic pyrolysis oils B and F according to b) can also be mixed together before being incorporated into a bitumen base.
• the incorporation can thus be envisaged at a level of 5% (by weight).

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• 2021
  • 2021-07-26 EP EP21306036.1A patent/EP4124638A1/de not_active Withdrawn
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