초록 ▼

The present invention relates to a method and system for water removal and optionally liquid product separation in slurry reactors operating at Fischer-Tropsch conditions. More particularly, the present invention includes a water stripping system that allows the reaction water to the stripped in an

The present invention relates to a method and system for water removal and optionally liquid product separation in slurry reactors operating at Fischer-Tropsch conditions. More particularly, the present invention includes a water stripping system that allows the reaction water to the stripped in an external vessel, with a relatively high rate of catalyst and wax circulation. In a preferred embodiment of the present invention, a method for removing water from a slurry reactor containing a water-rich slurry includes removing a portion of water-rich slurry from the slurry reactor, stripping water from the water-rich slurry using a dry gas to form a water-reduced slurry and a water-rich gas stream, and returning the water-reduced slurry back to the reactor.

대표청구항 ▼

The present invention relates to a method and system for water removal and optionally liquid product separation in slurry reactors operating at Fischer-Tropsch conditions. More particularly, the present invention includes a water stripping system that allows the reaction water to the stripped in an

The present invention relates to a method and system for water removal and optionally liquid product separation in slurry reactors operating at Fischer-Tropsch conditions. More particularly, the present invention includes a water stripping system that allows the reaction water to the stripped in an external vessel, with a relatively high rate of catalyst and wax circulation. In a preferred embodiment of the present invention, a method for removing water from a slurry reactor containing a water-rich slurry includes removing a portion of water-rich slurry from the slurry reactor, stripping water from the water-rich slurry using a dry gas to form a water-reduced slurry and a water-rich gas stream, and returning the water-reduced slurry back to the reactor. except that one of the groups R1,R2,and R3may be a methyl group. 8. A process as claimed in claim 1, wherein the indolines corresponding to formula I or salts thereof are used as color modifiers in oxidation hair dyes containing other aromatic or heterocyclic amino primary intermediate compounds. 9. A process as claimed in claim 8, wherein indolines of formula I or salts thereof are present in a quantity of 0.1 to 20 millimoles per 100 g of hair dye as oxidation dye precursors and the carrier is a gel containing 1 to 20% by weight of a soap or an oil-in-water emulsion containing 1 to 25% by weight of a fatty component and 0.5 to 30% by weight of an emulsifier from the group of anionic, nonionic, cationic, or ampholytic surfactants. 10. A process as claimed in claim 3, wherein indolines of formula I or salts thereof are present in a quantity of 0.1 to 20 millimoles per 100 g of hair dye as oxidation dye precursors and the carrier is a gel containing 1 to 20% by weight of a soap or an oil-in-water emulsion containing 1 to 25% by weight of a fatty component and 0.5 to 30% by weight of an emulsifier from the group of anionic, nonionic, cationic, or ampholytic surfactants. 11. A process as claimed in claim 2, wherein indolines of formula I or salts thereof are present in a quantity of 0.1 to 20 millimoles per 100 g of hair dye as oxidation dye precursors and the carrier is a gel containing 1 to 20% by weight of a soap or an oil-in-water emulsion containing 1 to 25% by weight of a fatty component and 0.5 to 30% by weight of an emulsifier from the group of anionic, nonionic, cationic, or ampholytic surfactants. 12. A process as claimed in claim 1, wherein indolines of formula I or salts thereof are present in a quantity of 0.1 to 20 millimoles per 100 g of hair dye as oxidation dye precursors and the carrier is a gel containing 1 to 20% by weight of a soap or an oil-in-water emulsion containing 1 to 25% by weight of a fatty component and 0.5 to 30% by weight of an emulsifier from the group of anionic, nonionic, cationic, or ampholytic surfactants. 13. A process according to claim 1, wherein the oxidation of said dyeing composition occurs with the aid of a chemical oxidizing agent selected from the group consisting of: (i) hydrogen peroxide (ii) hydrogen peroxide adducts with urea, melamine, or sodium borate (iii) dispersions of potassium or ammonium peroxydisulfate; and (iv) periodates. 14. A process according to claim 1, wherein the chemical oxidizing agent consists of water soluble periodates.