초록 ▼

A high carbon content membrane and method for making the same are disclosed. The carbon membrane includes an asymmetric hollow filamentary carbon membrane, including a partial carbonization product of an asymmetric hollow filament including an aromatic imide polymer material. The carbon membrane is

A high carbon content membrane and method for making the same are disclosed. The carbon membrane includes an asymmetric hollow filamentary carbon membrane, including a partial carbonization product of an asymmetric hollow filament including an aromatic imide polymer material. The carbon membrane is at least 95 weight percent carbon, and has a dense layer located in the outside surface portion of the hollow filamentary membrane and a porous base layer continued from the dense layer and located in the inside portion of the hollow filamentary membrane. A process for separating CO2from natural gas is described including: contacting a mixture of CO2and natural gas with a first side of a carbon membrane in a manner to cause a portion of the mixture to pass through the carbon membrane to a permeate side. The resulting mixture on the permeate side becomes enriched in CO2over that of the mixture on the first side. The contacting step occurs at a pressure of at least about 200 psia.

대표청구항 ▼

A high carbon content membrane and method for making the same are disclosed. The carbon membrane includes an asymmetric hollow filamentary carbon membrane, including a partial carbonization product of an asymmetric hollow filament including an aromatic imide polymer material. The carbon membrane is

A high carbon content membrane and method for making the same are disclosed. The carbon membrane includes an asymmetric hollow filamentary carbon membrane, including a partial carbonization product of an asymmetric hollow filament including an aromatic imide polymer material. The carbon membrane is at least 95 weight percent carbon, and has a dense layer located in the outside surface portion of the hollow filamentary membrane and a porous base layer continued from the dense layer and located in the inside portion of the hollow filamentary membrane. A process for separating CO2from natural gas is described including: contacting a mixture of CO2and natural gas with a first side of a carbon membrane in a manner to cause a portion of the mixture to pass through the carbon membrane to a permeate side. The resulting mixture on the permeate side becomes enriched in CO2over that of the mixture on the first side. The contacting step occurs at a pressure of at least about 200 psia. disposed within said conditioning chamber; and c) a feedback and control means in communication with both said temperature sensing means and said heating means for regulating the operation of said heating means in response to said communication. 14. The method of claim 1 wherein said overspray collection chamber is constructed such that said zones of higher velocity gas movement are achieved by a means of restricting the volume of said overspray collection chamber in specific limited regions of said overspray collection chamber. 15. The method of claim 14 wherein said means of restricting the volume of said overspray collection chamber in said specific limited regions of said overspray collection chamber is accomplished by utilizing evase wicking baffles. 16. A recovery system for recovering a liquid overspray from a gas stream in a manufacturing process in which a gas-entrained liquid is applied to a workpiece, said recovery system comprising: a. a hooded spray application chamber oriented above or about said manufacturing process for collection of said gas-entrained liquid overspray; b. a conditioning chamber for maintaining or altering the temperature of an air stream to a temperature above the condensation temperature of said liquid before introduction of said air stream into said spray application chamber containing said gas-entrained liquid overspray; and c. an overspray collection chamber within which said gas-entrained liquid overspray is moved and wherein said gaseous stream alternately passes through one or more zones of lower velocity movement and higher velocity movement. 17. The recovery system of claim 16 wherein said gas which is entrained in said liquid overspray is air. 18. The recovery system of claim 16 wherein said gas which is entrained in said liquid overspray is carbon dioxide or a fluorocarbon-based gas. 19. The recovery system of claim 16 wherein said liquid is a substance which is a solid at ambient room temperature. 20. The recovery system of claim 16 wherein said liquid is a substance which is solvent-free. 21. The recovery system of claim 16 wherein said manufacturing process comprises a conveyer system. 22. The recovery system of claim 16 wherein said manufacturing process comprises a stationary chamber or a batch processing system. 23. The recovery system of claim 16 wherein said workpiece is paper, a textile product or a flexible sheet material. 24. The recovery system of claim 16 wherein said workpiece is a flexible sheet material containing paper fiber or is paper. 25. The recovery system of claim 16 wherein said flexible sheet material contains paper fiber and is a tissue paper product. 26. The recovery system of claim 25 wherein said tissue paper product is selected from the group consisting of sanitary tissues, household tissues, industrial tissues, facial tissues, cosmetic tissues, absorbent tissues, medicated tissues, toilet paper, paper towels, paper napkins, paper cloths, paper linens, and diaper material. 27. The recovery system of claim 16 wherein said spray application chamber is constructed of stainless steel. 28. The recovery system of claim 16 wherein said conditioning chamber is constructed of stainless steel. 29. The recovery system of claim 16 wherein said conditioning chamber comprises: a) a heating means for altering the temperature of said gas stream; b) a temperature sensing means disposed within said conditioning chamber; and c) a feedback and control means in communication with both said temperature sensing means and said heating means for regulating the operation of said heating means in response to said communication. 30. The recovery system of claim 16 wherein said overspray collection chamber is constructed such that said zones of higher velocity air movement are achieved by a means of restricting the volume of said overspray collection chamber in specific limited regions of said overspray collection chamber. 31. The recovery system of claim 30 where