Process for the recovery of gaseous or vaporous monomers from reaction off-gases

Claim 2

A polymerization process in which a low-boiling olefinically unsaturated monomer having a boiling point at atmospheric pressure between -20° and 40° C is homopolymerized in a liquid material having a boiling point above 50° C at atmospheric pressure, and in which a reaction off-gas is generated containing from 10 to 50 percent by volume of the low-boiling olefinically unsaturated monomer, wherein the reaction off-gas is treated with a liquid material which boils above 50° c at atmospheric pressure and is selected from the group consisting of a solution of the low-boiling monomer in an inert organic solvent, an aqueous emulsion of the low-boiling monomer and an aqueous suspension of the low-boiling monomer, under conditions such that said material does not react with the low-boiling monomer, whereby low-boiling monomer is extracted from the reaction off-gas, and the resulting liquid material containing low-boiling monomer is employed in the polymerization process for manufacture of further amounts of polymer.

Claim 3

A process for the recovery of polymerizable olefinically unsaturated monomers having at atmospheric pressure boiling points between -20° C and +40° C from reaction off-gases which contain from 10 to 50% by volume of these monomers, wherein the reaction off-gases are treated with olefinically unsaturated comonomers from the group consisting of styrene and monoolefinically unsaturated monocarboxylic acid esters of 4 to 8 carbon atoms, which comonomers are liquid at 50° C at atmospheric pressure and with which, and/or in which, the olefinically unsaturated low boiling monomers are subsequently reacted.

Claim 4

A process for the recovery of polymerizable olefinically unsaturated monomers having at atmospheric pressure boiling points between -20° C and +40° C from reaction off-gases which contain from 10 to 50% by volume of these monomers, wherein the reaction off-gases are treated with olefinically unsaturated comonomers from the group consisting of styrene and monoolefinically unsaturated monocarboxylic acid esters of 4 to 8 carbon atoms, which comonomers are liquid at 50° C at atmospheric pressure and with which, and/or in which, the olefinically unsaturated low boiling monomers are subsequently reacted.

Claim 5

A process as claimed in claim 2 wherein said monomers are low boiling olefinically unsaturated monomers from the group consisting of vinyl chloride, vinylidene chloride, vinyl methyl ether, isobutylene, butadiene and isoprene.

Claim 6

A process as claimed in claim 3, in which the liquid, olefinically unsaturated comonomers are employed as a solution in liquid, organic, inert solvents which are suitable media for carrying out a solution polymerization.

Claim 7

A process as claimed in claim 3, in which the liquid olefinically unsaturated comonomers are employed as an aqueous emulsion.

Claim 8

A process as claimed in claim 3, in which the liquid olefinically unsaturated comonomers are employed as an aqueous suspension.

Claim 9

A process for the recovery of polymerizable olefinically unsaturated monomers having at atmospheric pressure boiling points between -20° C and +40° C from reaction off-gases which contain from 10 to 50% by volume of these monomers, wherein the reaction off-gases are treated with inorganic inert solvents which are suitable media for carrying out a solution polymerization and which are liquid at 50° C at atmosheric pressure and in which the olefinically unsaturated low boiling monomers are subsequently reacted.

Claim 10

A process for the recovery of polymerizable olefinically unsaturated monomers having at atmospheric pressure boiling points between -20° C and +40° C from reaction off-gases which contain from 10 to 50% by volume of these monomers, wherein the reaction off-gases are treated with inorganic inert solvents which are suitable media for carrying out a solution polymerization and which are liquid at 50° C at atmosheric pressure and in which the olefinically unsaturated low boiling monomers are subsequently reacted.

Claim 11

A process as claimed in claim 7 wherein said monomers are low boiling olefinically unsaturated monomers from the group consisting of vinyl chloride, vinylidene chloride, vinyl methyl ether, isobutylene, butadiene and isoprene.

Claim 12

A polymerization process in which low-boiling olefinically unsaturated monomer having a boiling point at atmospheric pressure between -20° and 40° C is copolymerized with an olefinically unsaturated comonomer in an inert material which is liquid at 50° C, the comonomer and the inert liquid material boiling above 50° C at atmospheric pressure, and in which a reaction off-gas is generated containing from 10 to 50% by volume of the low-boiling olefinically unsaturated monomer, wherein the reaction off-gas is treated with olefinically unsaturated comonomers from the group conisting of styrene and monoolefinically unsaturated monocarboxylic acid esters of 4 to 8 carbon atoms, and which boils above 50° C, under conditions such that said comonomers are liquid and do not react with the low-boiling monomer, whereby low-boiling monomer is extracted from the eaction off-gas, and the reuslting liquid containing low-boiling monomer and comonomers is employed in the polymerization process for manufacture of further amounts of copolymer.

Claim 13

A polymerization process in which low-boiling olefinically unsaturated monomer having a boiling point at atmospheric pressure between -20° and 40° C is copolymerized with an olefinically unsaturated comonomer in an inert material which is liquid at 50° C, the comonomer and the inert liquid material boiling above 50° C at atmospheric pressure, and in which a reaction off-gas is generated containing from 10 to 50% by volume of the low-boiling olefinically unsaturated monomer, wherein the reaction off-gas is treated with olefinically unsaturated comonomers from the group conisting of styrene and monoolefinically unsaturated monocarboxylic acid esters of 4 to 8 carbon atoms, and which boils above 50° C, under conditions such that said comonomers are liquid and do not react with the low-boiling monomer, whereby low-boiling monomer is extracted from the eaction off-gas, and the reuslting liquid containing low-boiling monomer and comonomers is employed in the polymerization process for manufacture of further amounts of copolymer.

Claim 14

A polymerization process in which a low-boiling olefinically unsaturated monomer having a boiling point at atmospheric pressure between -20° and 40° C is copolymerized with an olefinically unsaturated comonomer in an inert material which is liquid at 50° C, the comonomer and the inert liquid material boiling above 50° C at atmospheric pressure, and in which a reaction off-gas is generated containing from 10 to 50% by volume of the low-boiling olefinically unsaturated monomer, wherein the reaction off-gas is treated with organic inert solvents which are suitable media for carrying out a solution polymerization and which boils above 50° C, under conditions such that said solvents are liquid and do not react with the low-boiling monomer, whereby low-boiling monomer is extracted from the reaction off-gas, and the resulting liquid containing low-boiling monomer and solvent is employed in the polymerization process for manufacture of further amounts of copolymer.

Claim 15

A polymerization process in which a low-boiling olefinically unsaturated monomer having a boiling point at atmospheric pressure between -20° and 40° C is copolymerized with an olefinically unsaturated comonomer in an inert material which is liquid at 50° C, the comonomer and the inert liquid material boiling above 50° C at atmospheric pressure, and in which a reaction off-gas is generated containing from 10 to 50% by volume of the low-boiling olefinically unsaturated monomer, wherein the reaction off-gas is treated with organic inert solvents which are suitable media for carrying out a solution polymerization and which boils above 50° C, under conditions such that said solvents are liquid and do not react with the low-boiling monomer, whereby low-boiling monomer is extracted from the reaction off-gas, and the resulting liquid containing low-boiling monomer and solvent is employed in the polymerization process for manufacture of further amounts of copolymer.