The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps: (i) forming a mixture of a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with b. at least one alkylamine; (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine; (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 80% by weight, preferably no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound; (iva) removing the first phase from the second phase; and then (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then (vb) removing the first phase from the second phase.

The present disclosure provides a process for removing fluoroorganic acidic compounds from an emulsion of fluoroorganic polymer particles, the process comprising the following steps: (i) forming a mixture of a. an emulsion comprising fluoroorganic polymer particles, at least one fluoroorganic acidic compound and at least one protic solvent, with b. at least one alkylamine; (ii) reacting the fluoroorganic acidic compound with the alkylamine to form a hydrophobic ionic compound comprising the anion of the fluoroorganic acidic compound and the cation of the alkyl amine; (iii) separating the mixture into a first phase comprising the at least one protic solvent and no greater than 80% by weight, preferably no greater than 50% by weight of the total amount of the at least one fluoroorganic acidic compound initially present in the solution in step (i); and a second phase comprising the hydrophobic ionic compound; (iva) removing the first phase from the second phase; and then (va) removing the fluoroorganic polymer particles from the second phase and/or the first phase, or (ivb) removing the fluoroorganic polymer particles from the second phase and/or the first phase, and then (vb) removing the first phase from the second phase.

The present invention relates to a technique for recovering a solvent and an unreacted material in an extruder (finisher) for a polyolefin elastomer (POE) preparation process, wherein the solvent and the unreacted material are maximally recovered with energy minimization through a recovery process of hydrocarbons (HCs) removed from a product in the extruder (finisher) for the POE preparation process, and thus are reused in the polyolefin elastomer preparation process.

The present invention relates to a technique for recovering a solvent and an unreacted material in an extruder (finisher) for a polyolefin elastomer (POE) preparation process, wherein the solvent and the unreacted material are maximally recovered with energy minimization through a recovery process of hydrocarbons (HCs) removed from a product in the extruder (finisher) for the POE preparation process, and thus are reused in the polyolefin elastomer preparation process.

A method for producing a purified fluoropolymer aqueous dispersion, which includes: (A) bringing a fluoropolymer aqueous dispersion obtained using a hydrocarbon surfactant into contact with an anion exchange resin A or a synthetic adsorbent. The anion exchange resin A has an ion-exchange group represented by the following general formula (A1):

—N+R.sup.1R.sup.2R.sup.3X—

wherein each of R1, R2, and R3 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.1, R.sup.2, and R.sup.3 is an organic group having 3 or more carbon atoms; and X is a counter ion; or an ion-exchange group represented by the following general formula (A2):

—NR.sup.4R.sup.5

wherein each of R.sup.4 and R.sup.5 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.4 and R.sup.5 is an organic group having 2 or more carbon atoms.

A method for producing a purified fluoropolymer aqueous dispersion, which includes: (A) bringing a fluoropolymer aqueous dispersion obtained using a hydrocarbon surfactant into contact with an anion exchange resin A or a synthetic adsorbent. The anion exchange resin A has an ion-exchange group represented by the following general formula (A1):

—N+R.sup.1R.sup.2R.sup.3X—

wherein each of R1, R2, and R3 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.1, R.sup.2, and R.sup.3 is an organic group having 3 or more carbon atoms; and X is a counter ion; or an ion-exchange group represented by the following general formula (A2):

—NR.sup.4R.sup.5

wherein each of R.sup.4 and R.sup.5 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.4 and R.sup.5 is an organic group having 2 or more carbon atoms.

A method for producing a purified fluoropolymer aqueous dispersion, which includes: (A) bringing a fluoropolymer aqueous dispersion obtained using a hydrocarbon surfactant into contact with an anion exchange resin A or a synthetic adsorbent. The anion exchange resin A has an ion-exchange group represented by the following general formula (A1):

—N+R.sup.1R.sup.2R.sup.3X—

wherein each of R1, R2, and R3 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.1, R.sup.2, and R.sup.3 is an organic group having 3 or more carbon atoms; and X is a counter ion; or an ion-exchange group represented by the following general formula (A2):

—NR.sup.4R.sup.5

wherein each of R.sup.4 and R.sup.5 are the same or different, and are each a hydrogen atom or an organic group, and at least one of R.sup.4 and R.sup.5 is an organic group having 2 or more carbon atoms.

The present invention provides a method for preparing a vinyl chloride-based polymer, the method including (1) polymerizing a vinyl chloride-based monomer in the presence of a vinyl chloride-based first seed particle, a vinyl chloride-based second seed particle, and an emulsifier and (2) separating, after the polymerizing, a first vinyl chloride-based polymer and a second vinyl chloride-based polymer which are in a particulate form, wherein the separated first vinyl chloride-based polymer is dried using a fluid bed dryer (FBD), and the first vinyl chloride-based polymer has a smaller average particle diameter (D.sub.50) than the second vinyl chloride-based polymer, and two kinds of polymers having different physical properties may be prepared through a single manufacturing process.

The present invention provides a method for preparing a vinyl chloride-based polymer, the method including (1) polymerizing a vinyl chloride-based monomer in the presence of a vinyl chloride-based first seed particle, a vinyl chloride-based second seed particle, and an emulsifier and (2) separating, after the polymerizing, a first vinyl chloride-based polymer and a second vinyl chloride-based polymer which are in a particulate form, wherein the separated first vinyl chloride-based polymer is dried using a fluid bed dryer (FBD), and the first vinyl chloride-based polymer has a smaller average particle diameter (D.sub.50) than the second vinyl chloride-based polymer, and two kinds of polymers having different physical properties may be prepared through a single manufacturing process.

The present invention provides a method for preparing a vinyl chloride-based polymer, the method including (1) polymerizing a vinyl chloride-based monomer in the presence of a vinyl chloride-based first seed particle, a vinyl chloride-based second seed particle, and an emulsifier and (2) separating, after the polymerizing, a first vinyl chloride-based polymer and a second vinyl chloride-based polymer which are in a particulate form, wherein the separated first vinyl chloride-based polymer is dried using a fluid bed dryer (FBD), and the first vinyl chloride-based polymer has a smaller average particle diameter (D.sub.50) than the second vinyl chloride-based polymer, and two kinds of polymers having different physical properties may be prepared through a single manufacturing process.