摘要:
Pure or substantially enriched 2,4- and 2,6-dinitrotoluene can be isolated from a mixture containing these isomers if such a mixture is distilled under a pressure of 0.5 to 20 mbar at a temperature of 80.degree. to 200.degree. C. with exclusion of reducing conditions.
摘要:
Processes which include: (a) providing a gas phase comprising hydrogen chloride; (b) oxidizing the hydrogen chloride in a reactor to form a product gas comprising chlorine, unreacted hydrogen chloride and water, the reactor having structural parts with inner surfaces that are contacted during oxidation by one or both of the gas phase and the product gas; (c) cooling the process gas; (d) separating the unreacted hydrogen chloride and water from the product gas; (e) drying the product gas; and (f) separating the chlorine from the product gas; wherein the inner surfaces of the reactor structural parts that are contacted during oxidation by one or both of the gas phase and the product gas are comprised of a nickel material having a nickel content of at least 60 wt. %, are described.
摘要:
A device for cooling hot gases (quencher) with the formation of a corrosive condensation product, which device has a pressure-resistant container and at least one corrosion-resistant internal gas guide pipe, and to a method of cooling gases that form corrosive condensation products, which method uses the mentioned device.
摘要:
Processes which include: (a) providing a gas phase comprising hydrogen chloride; (b) oxidizing the hydrogen chloride in a reactor to form a product gas comprising chlorine, unreacted hydrogen chloride and water, the reactor having structural parts with inner surfaces that are contacted during oxidation by one or both of the gas phase and the product gas; (c) cooling the process gas; (d) separating the unreacted hydrogen chloride and water from the product gas; (e) drying the product gas; and (f) separating the chlorine from the product gas; wherein the inner surfaces of the reactor structural parts that are contacted during oxidation by one or both of the gas phase and the product gas are comprised of a nickel material having a nickel content of at least 60 wt. %, are described
摘要:
The invention relates to a device for separation of substance mixtures on the micro scale. The invention further relates to a process for separating substance mixtures using the inventive device. The device is a device for separating substance mixtures and for performing chemical reactions between immiscible fluid media on the micro scale, comprising a first channel plate with at least one first process channel for a first fluid medium, an inlet and an outlet, and a connecting or distributing channel in each case, which connects the inlet to the first process channel, and a further connecting or distributing channel which connects the first process channel to the outlet, a second channel plate with at least one second process channel for a second fluid medium immiscible with the first, an inlet and an outlet, and a connecting or distributing channel in each case, which connects the inlet to the second process channel, and a further connecting or distributing channel which connects the second process channel to the outlet, and a microscreen as a separating means between the two process channel, wherein the microscreen has a multitude of orifices which have an aspect ratio of 1.5 to 10.
摘要:
One or more fluid streams are uniformly divided into two or more partial fluid streams in chemical apparatuses in a manner such that there is a reduced tendency to form deposits. Division of such stream(s) is achieved by using a distributor device that includes at least one plate having two or more openings which openings are rounded or chamfered on at least one side.
摘要:
The present invention relates to a method for removing volatile compounds from sparingly volatile fluids by means of rectification using an auxiliary and also to separation methods and chemical reactions in which sparingly volatile fluids are used, the purification of which is effected by means of rectification and using an auxiliary.
摘要:
One or more fluid streams are uniformly divided into two or more partial fluid streams in chemical apparatuses in a manner such that there is a reduced tendency to form deposits. Division of such stream(s) is achieved by using a distributor device that includes at least one plate having two or more openings which openings are rounded or chamfered on at least one side.
摘要:
The present invention relates to a method for removing volatile compounds from sparingly volatile fluids by means of rectification using an auxiliary and also to separation methods and chemical reactions in which sparingly volatile fluids are used, the purification of which is effected by means of rectification and using an auxiliary.
摘要:
Process for the purification of toluenediisocyanate from a crude distillation feed which includes toluenediisocyanate, an organic solvent and less than 2% by weight phosgene by separating the crude distillation feed in a dividing-wall distillation column into at least four product fractions P1–P4. P1 is a phosgene enriched low-boiler product, P2 is a solvent-enriched product, P3 is a high boiler enriched bottoms and P4 is a toluenediisocyanate product stream.
摘要翻译:通过将分馏壁蒸馏塔中的粗蒸馏进料分离成至少四个产物馏分P 1 -P 4,从粗蒸馏进料中纯化甲苯二异氰酸酯的方法,所述原油蒸馏进料包括甲苯二异氰酸酯,有机溶剂和小于2重量%的光气 P 1是富含光气的低沸点产物,P 2是富含溶剂的产物,P 3是富含高浓度锅炉的塔底物,P 4是甲苯二异氰酸酯产物流。