28 results about "Solvolysis" patented technology

Disclosed herein are methods of recycling mixed plastics streams without the need to sort or pre-treat the mixed plastic streams prior to treatment. The methods generally comprise solvolysis of a first fraction of the mixed plastics, and oxidation of a second fraction of the mixed plastics in the presence of oxygen, where the solvolysis deconstructs the first fraction to a first compound, and the oxidation deconstructs the second fraction to a second compound. Methods of separating both the first and second compounds are also provided.

A process for producing 1,4-cyclohexanedimethanol by depolymerizing one or more recycled terephthalate-based polyesters or copolyesters via solvolysis with one or more glycols or alcohols and contacting the depolymerization product with an ester hydrogenolysis catalyst and hydrogen to produce a hydrogenolysis product and contacting the hydrogenolysis product with a hydrogenation catalyst and hydrogen to produce 1,4- cyclohexanedimethanol.

A chemical recycling facility for the treatment of mixed waste plastics is provided. Such a facility has the capacity to process mixed plastic waste streams and utilizes various recycling units, such as a solvolysis unit, a pyrolysis unit, a cracking unit, a partial oxidation gasification unit, an energy recovery unit, and a solidification unit. Streams from one or more of these individual units may be used as feed streams to one or more of the other units, thereby maximizing the recovery of valuable chemical components and minimizing unusable waste streams.

Described herein are devices and methods for the efficient and economic generation of lignin monomers from biomass. The provided devices and methods utilize reductive catalytic fractionation with an organic solvent to extract high-quality lignin from biomass and cleave specific lignin bonds to generate valuable lignin monomers with a relatively narrow product slate. Advantageously, the devices and methods described herein utilize solvent recycling, multiple solvolysis chambers with multiple biomass beds and / or physical agitation (e.g., use of a screw extruder) to reduce the amount of solvent required and increase economic efficiency and monomer yield.

The present invention relates to metallic nanoparticles stabilized by a diamondoid ligand. Nanoparticles, and networks of nanoparticles, of controlled small sizes below 10 nm, are used and recycled for the efficient delivering, in high rate, of hydrogen gas H2, extracted from solid organic sources in hydrolysis and solvolysis reactions.

This invention discloses an electrolyte, a supercapacitor, and their application in wind power energy storage based on a silicon-sulfur synergistic multifunctional electrolyte additive, belonging to the field of supercapacitor technology. The additive is composed of 4-(triethoxysilyl)phenyl isothiocyanate and diphenylphosphimide in a mass ratio of (0.4~1.2):(0.3~0.9). Through the efficient acid removal of the isothiocyanate group, the chemical anchoring of the siloxane group, and the stabilizing effect of the phenyl conjugation, it synergizes with the flame retardant and ion transport regulation functions of the phosphorimide to construct a stable interface with high temperature resistance and high ion conductivity. The electrolyte contains the additive, a composite lithium salt (LiPF6 / LiFSI / LiPO2F2), a five-element functional solvent (FEC / EC / PC / DEC / EMC), and auxiliary film-forming components (VC / DTD / PST), which synergistically solve the problems of acid corrosion, interface instability, and solvent decomposition at high temperatures. The supercapacitor exhibits low free acidity and high capacity retention after 28 days of storage at 55°C, high capacity retention after 350 high-temperature cycles, and short self-extinguishing time, meeting the high reliability requirements of extreme operating conditions such as wind power energy storage.

The invention discloses a neutralization deacidification regeneration method and system for an acidified organic solvent and cleaning equipment, and relates to the technical field of industrial cleaning solvent regeneration. The method comprises the following steps: pre-treating an acidified organic solvent, and removing impurities; mixing the pretreated solvent with a neutralizer solution, and carrying out a neutralization reaction, wherein the neutralizer comprises an alkaline component for neutralizing acidic substances; separating the mixed system after the neutralization reaction to obtain an organic phase; and dehydrating and purifying the organic phase to obtain the regenerated organic solvent. According to the invention, the obvious defects existing in the treatment mode in the current industry are overcome: direct addition of a neutralizer and direct addition of an alkaline neutralizer into cleaning equipment, but uniform mixing is difficult, local over-alkalinity is often caused to cause solvent decomposition, and generated salts are easy to block a precision filter; and when the acid value seriously exceeds the standard, only the solvent in the whole tank needs to be replaced, a large amount of hazardous waste is generated, and the treatment cost is increased.

Where thermochemical liquefaction of lignocellulosic biomass is conducted using recirculated product oil as solvent, yields can be substantially increased by addition of a short chain alcohol reactant such as ethanol or methanol. A synergistic effect is thereby obtained where liquefaction is improved over using either recycled product oil or alcohol alone. The combination of re-circulated product oil and alcohol reactant permits high conversion at operating pressures considerably lower than typically applied in alcohol solvolysis, typically within the range 30-60 bar. The liquefaction reaction occurs at subcritical pressure where the alcohol acts as a gaseous reactant and not as a solvent.

The present invention relates to the field of recovery of carbonaceous materials such as carbon black, particularly so-called "recovered" carbon black (or rCB) obtained through a solvolysis process of spent elastomers. It concerns a process for preparing recovered carbon black via a solvolysis process of spent elastomers with recycling of a hydrocarbon fraction comprising aromatic compounds, followed by a centrifugation step of the solvolysis effluent and conduction drying to obtain the recovered carbon black. [Fig. 1] to be published for the abstract

The present invention relates to a process for treating a mixture (M1) comprising a solvent composition (SC) comprising a polar solvent (S), soluble oligomers and optionally monomers of a polymer (P1), filler (F1), and optionally further insoluble residues, comprising providing mixture (M1); and separating the filler (F1) and insoluble residues from mixture (M1) obtaining mixture (M-2) comprising the filler (F1) and insoluble residues, and mixture (M-3) comprising the solvent composition (SC) and soluble oligomers and optionally monomers of the polymer (P1), wherein the separation is carried out by filtration at a pressure below 55 bar and a temperature in the range of from 150 to 270°C. The present invention is also directed to the fillers obtainable or obtained by said process as well as the use thereof for preparing a polymeric product.

Chemical recycling facilities for processing mixed plastic waste are provided herein. Such facilities have the capability of processing mixed plastic waste streams and utilize a variety of recycling facilities, such as, for example, solvolysis facility, a pyrolysis facility, a cracker facility, a partial oxidation gasification facility, an energy generation / energy production facility, and a solidification facility. Streams from one or more of these individual facilities may be used as feed to one or more of the other facilities, thereby maximizing recovery of valuable chemical components and minimizing unusable waste streams.

The present invention relates to a rubber mixture comprising a polyester having at least one saturated and unsaturated monomer, which rubber mixture can be processed into a rubbery vulcanized product, which rubbery vulcanized product is degradable by the contained ester bonds, and to a method for producing the rubber mixture. The invention also relates to a recovery process comprising a solvolysis step, a separation and purification step and a repolymerization of the resulting monomers and / or oligomers.

The present invention relates to a process for treating a polymeric material (PM) comprising a polyamide 66 (PA66) based polymer and at least one filler (F1), the process comprising providing a polymeric material (PM) comprising a polyamide (PA66) based polymer and at least one filler (F1) and a solvent composition (SC) comprising water; preparing a mixture (M-0) from the polymeric material (PM) and the solvent composition (SC); subjecting mixture (M-0) to conditions for depolymerizing the polyamide 66 based polymer (D1) comprising a depolymerization temperature T(D1) in the range of from 150 to 300°C, in particular in the range of from 150 to 250°C, and a depolymerization time t(D1) of at least 0.25 hours, preferably in the range of from 0.25 to 8 hours, in particular in the range of from 0.5 to 8 hours, wherein the factor F(D1)=T(D1) x t(D1) is in the range of from 200 to 10000 K*h, preferably from 260 to 3700 K*h obtaining a mixture (M-1) comprising the solvent composition (SC), soluble oligomers and optionally monomers of the polyamide 66 based polymer, filler (F1), and insoluble residues; and separating the filler (F1) and insoluble residues from mixture (M-1) obtaining mixture (M-2) comprising the filler (F1) and insoluble residues, and mixture (M-3) comprising the solvent composition (SC) and soluble oligomers and optionally monomers of the polyamide 66 based polymer.

The present disclosure relates to a method that includes contacting a fiber-reinforced composite with a solvent, where the fiber-reinforced composite is constructed from a fiber and a macromolecule, the contacting results in the formation of a mixture that includes a liquid phase of the solvent and the macromolecule solubilized in the solvent and a solid phase of the fiber, and separating the mixture resulting in a first stream of the solid phase and a second stream of the liquid phase.

Method for the reprocessing of a poly(meth)acrylate-containing adhesive mass, comprising the following process steps: a) Manufacturing or providing a starting composition comprising one or more poly(meth)acrylates, each comprising a plurality of organic residues linked via an ester bond -OR 1i , where R 1i For each residue i, independently of the other residues, is selected from the group consisting of linear and branched hydrocarbon residues with 1 to 25 carbon atoms, b) Combining the starting composition with a solvolysis composition comprising one or more solvolyses, wherein the solvolyses are selected from the group consisting of water, monohydric alcohols of the formula HO-R 2i , where R 2i selected is from the group consisting of linear and branched hydrocarbon residues with 1 to 3 carbon atoms, where R 2i at least partially from R1i is different, and higher alcohols with 2 or 3 carbon atoms, to obtain a reaction composition, and c) Performing solvolysis by cleaving ester bonds to the organic residues -OR 1i in the poly(meth)acrylates contained in the reaction composition, to obtain a product composition, comprising: i) one or more recovered alcohols of the formula HO-R 1i , and ii) one or more reaction products of the poly(meth)acrylates with the solvolyzing agent(s), d) Separating the recovered alcohols from the product composition.

Disclosed in the present invention are a polyolefin-like long-carbon-chain polyester elastomer, and a preparation method therefor and a use thereof. The polyolefin-like long-carbon-chain polyester elastomer is formed by polymerizing a long-carbon-chain dicarboxylic acid or an esterified product of the long-carbon-chain dibasic acid with a dihydric alcohol. The long-carbon-chain polyester elastomer can be recycled in a closed loop manner. The preparation method comprises: under inert gas protection, placing a long-carbon-chain dicarboxylic acid or an esterified product thereof, a dihydric alcohol, and a catalyst into a three-necked flask in proportion, and controlling the reaction temperature and the stirring rotation speed to prepare an oligomer; and under vacuum conditions, carrying out a polycondensation reaction on the oligomer prepared in step S1 to obtain the long-carbon-chain polyester elastomer. In the present invention, the molecular weight and the thermodynamic properties can be effectively regulated by designing the ratio of soft and hard segments in a polymer; and the preparation process is simple, convenient and safe, and the equipment requirement and the catalytic cost are relatively low. Since the crystallization process can utilize the Van der Waals force between hydrocarbon chain segments, an ester bond is present in the structure, and chemical recycling is allowed by means of solvolysis, the long-carbon-chain polyester elastomer of the present invention is expected to become a potential substitute of high-density polyethylene.

The present invention relates to a process for treating a polymeric material (PM) comprising a polyamide (PA66) based polymer and at least one filler (F1), the process comprising providing a polymeric material (PM) comprising a polyamide (PA66) based polymer and at least one filler (F1) and a solvent composition (SC) comprising water and optionally a polar solvent; preparing a mixture (M-0) from the polymeric material (PM) and the solvent composition (SC); subjecting mixture (M-0) to depolymerization conditions (D1) comprising a depolymerization temperature T(D1) in the range of from 150 to 300°C and a depolymerization time t(D1) of at least 5 minutes, preferably in the range of from 5 to 120 minutes, in particular in the range of from 5 to 30 minutes, in the presence of a base, wherein the factor F(D1)=T(D1) x t(D 1 ) is in the range of from 40 to 2200 K*h, obtaining a mixture (M-1) comprising the solvent composition (SC), soluble monomers and / or oligomers of the polyamide (PA66) based polymer, filler (F1), insoluble monomers and insoluble residues; separating the filler (F1), insoluble monomers and insoluble residues from mixture (M-1) obtaining mixture (M-2) comprising the filler (F1), insoluble monomers and insoluble residues, and mixture (M-3) comprising the solvent composition (SC), and soluble monomers and / or oligomers of the polyamide (PA66) based polymer; and optionally separating the filler (F1) from further components of mixture (M-2).

The present invention relates to a process for converting used tires to obtain carbon black, comprising the following steps: a) feeding a solid feedstock based on used tires to a reaction zone in the presence of a liquid solvent to obtain a vapor effluent and a first liquid effluent containing carbon black, b) feeding the liquid effluent to a filtering and washing unit to obtain a filtered and washed carbon black cake and a second liquid effluent; c) feeding the vapor effluent and the second liquid effluent to a fractionation zone to obtain at least one hydrocarbon fraction; d) feeding the hydrocarbon fraction obtained at the end of step c) to the reaction zone as liquid solvent for step a); and e) drying the carbon black cake.

The present disclosure relates to solvolysis of a substantially solid renewable feedstock (10) comprising forest industry residue(s). More in detail the disclosure relates to a process for converting substantially solid renewable feedstock (10) to renewable liquid product(s), wherein the process comprises feedstock conditioning (100); which comprises one or more of washing, mechanical dewatering (101), thermal drying (102) and pretreatment (103) in the presence of solvent (20) to obtain a feed mixture (30); subjecting the feed mixture (20) to solvolysis (200); fractionation (210); extraction (300) and optional upgrading of the obtained purified biocrude. The present disclosure further relates to the use of the obtained product(s).

The present disclosure relates to solvolysis of a substantially solid renewable feedstock (10) comprising forest industry residue(s). More in detail the disclosure relates to a process for converting substantially solid renewable feedstock (10) to renewable liquid product(s), wherein the process comprises feedstock conditioning (100); which comprises one or more of washing, mechanical dewatering (101), thermal drying (102) and pretreatment in the presence of solvent (103) to obtain a feed mixture (30); subjecting the feed mixture (30) to solvolysis (200); fractionation (210); extraction (300) and optional upgrading of the obtained purified biocrude. The present disclosure further relates to the use of the obtained product(s).

Described herein are systems and methods for the conversion of biomass, including lignin, into compounds useful as sustainable aviation fuel (SAF). Advantageously, the provided systems and methods remove the need for reductive catalytic fractionization and the use bioderived solvents rather than expensive exogenous solvents to increase energy efficiency and reduce processing costs. Instead, the described processes utilize flow through solvolysis and hydrodeoxygenation (HDO) as a single, flow-through process to convert biomass into useful fuels.

A process for producing 1,4-cyclohexanedimethanol by depolymerizing one or more recycled terephthalate-based polyesters or copolyesters via solvolysis with one or more glycols or alcohols and contacting the depolymerization product with an ester hydrogenolysis catalyst and hydrogen to produce a hydrogenolysis product and contacting the hydrogenolysis product with a hydrogenation catalyst and hydrogen to produce 1,4- cyclohexanedimethanol.

The present invention relates to the field of recovering carbonaceous materials of the carbon black type, in particular carbon blacks referred to as "recovered" carbon blacks (rCB) by means of a method for the solvolysis of used elastomers. It relates to a method for preparing recovered carbon black by means of a method for the solvolysis of used elastomers, which involves recycling a hydrocarbon cut comprising aromatic compounds, followed by a step of centrifuging the solvolysis effluent and carrying out conduction drying in order to obtain the recovered carbon black.

A method of recycling plastic waste by feeding a quantity of PET and PVC-containing reclaimer flake reject separated from the plastic waste to a chemical recycling facility; and depolymerizing in said chemical recycling facility at least a portion of said PET- and PVC-containing reclaimer flake reject which further comprises feeding at least a portion of the flake reject into at least one density separation stage before depolymerizing, in which a PET-enriched stream and a polyolefins-enriched stream are produced from a waste plastic stream comprising the flake reject; wherein the flake reject comprises at least 1 weight percent of PVC on a dry basis, and wherein the flake reject comprises at least 0.1 weight percent and / or not more than 20 weight percent polyolefins on a dry basis, wherein the flake reject is fed directly into a solvolysis facility within the chemical recycling facility and the solvolysis facility is a methanolysis facility.

According to the present invention, provided is a method for recycling a waste polyester raw material comprising 40 wt% or less of a heterogeneous component, the method comprising the steps of: depolymerizing a waste polyester raw material through solvolysis; and filtering a depolymerized product of the waste polyester raw material to separate at least a portion of the heterogeneous component from the depolymerized product, wherein the heterogeneous component comprises a compound which is not decomposed in the depolymerizing step.

The present disclosure relates to solvolysis of a substantially solid renewable feedstock (10) comprising residue(s) of oil-bearing crop(s). More in detail the disclosure relates to a process for converting substantially solid renewable feedstock (10) to renewable liquid product(s), wherein the process comprises feedstock conditioning (100), which comprises pretreatment (103) of the substantially solid renewable feedstock (10) in the presence of solvent (20) to obtain a feed mixture (30); subjecting the feed mixture (30) to solvolysis (200); fractionation (210); optional extraction (300) and optional upgrading of the obtained purified biocrude. The present disclosure further relates to the use of the obtained product(s).

Disclosed in the present invention are a polyolefin-like long-carbon-chain polyester elastomer, and a preparation method therefor and a use thereof. The polyolefin-like long-carbon-chain polyester elastomer is formed by polymerizing a long-carbon-chain dicarboxylic acid or an esterified product of the long-carbon-chain dibasic acid with a dihydric alcohol. The long-carbon-chain polyester elastomer can be recycled in a closed loop manner. The preparation method comprises: under inert gas protection, placing a long-carbon-chain dicarboxylic acid or an esterified product thereof, a dihydric alcohol, and a catalyst into a three-necked flask in proportion, and controlling the reaction temperature and the stirring rotation speed to prepare an oligomer; and under vacuum conditions, carrying out a polycondensation reaction on the oligomer prepared in step S1 to obtain the long-carbon-chain polyester elastomer. In the present invention, the molecular weight and the thermodynamic properties can be effectively regulated by designing the ratio of soft and hard segments in a polymer; and the preparation process is simple, convenient and safe, and the equipment requirement and the catalytic cost are relatively low. Since the crystallization process can utilize the Van der Waals force between hydrocarbon chain segments, an ester bond is present in the structure, and chemical recycling is allowed by means of solvolysis, the long-carbon-chain polyester elastomer of the present invention is expected to become a potential substitute of high-density polyethylene.

The present invention relates to a method for separating a plastic solvolysis mixture comprising plastic degradation product, solvent and catalyst by means of membrane filtration. The resulting fractions can be recycled and reused, for example, for the solvolysis of plastics or as raw materials for the production of plastics.