-
公开(公告)号：US3842157A
公开(公告)日：1974-10-15
申请号：US22602472
申请日：1972-02-14
发明人： NEUMANN U
CPC分类号： C01D7/07
摘要： 1. IN A PROCESS FOR THE PRODUCING SODIUM CARBONATE MONOHYDRATE BY CARBONATING AT 70-110* C. IN A SINGLE STAGE, A DIAPHRAGM PROCESS AQUEOUS SODIUM HYDROXIDE SOLUTION CONCENTRATED TO 45-55% NAOH AND CONTAMINATED WITH FROM 0.2 TO 5% BY WEIGHT OF NACL, WITH A CO2-CONTAINING GAS TO FORM SAID MONOHYDRATE AND SUMULTANEOUSLY EVAPORATE WATER FROM SAID SOLUTION, SEPARATING PARTICULATE MONOHYDRATE FROM ITS MOTHER LIQUOR, AND RECYCLING CLARIFIED MOTHER LIQUOR TO THE CARBONATION STAGE, THE IMPROVEMENT COMPRISING: (A) DIVIDING SAID CLARIFIED MOTHER LIQUOR INTO A FIRST PORTION FND A SECOND PORTION; (B) RECYCLING THE FIRST PORTION COMPRISING FROM ABOUT 60 TO 95% BY VOLUME OF SAID CLARIFIED MOTHER LIQUOR TO SAID CARBONATION STAGE; (C) PASSING THE SECOND PORTION COMPRISING FROM ABOUT 40 TO 5% BY VOLUME OF SAID CLARIFIED MOTHER LIQUOR TO AN EVAPORATOR STAGE; (D) EVAPORATING SAID SECOND PORTION TO REMOVE ABOUT 15 TO 50% BY VOLUME OF THE MOTHER LIQUOR WATER CONTENT THEREFROM, THEREBY PRECIPITATING SOLID SODIUM CARBONATE MONOHYDRATE; AND (E) SEPARATING SAID MONOHYDRATE FROM SAID INORGANIC SALT IN A SOLUTION PHASE OF THE EVAPORATION MIXTURE.
-
公开(公告)号：US3818088A
公开(公告)日：1974-06-18
申请号：US13501671
申请日：1971-04-19
发明人： SASSE J
IPC分类号： C01B17/765 , C01B17/80
CPC分类号： C01B17/7655
摘要： In the double absorption contact process for the production of sulfuric acid, the sump of the air drying tower and/or sulfur dioxide drying tower is connected in cascade series flow with the sump of the intermediate absorber tower which in turn is connected with the sump of the final absorber tower. The connection between the towers is effected by overflow pipes having at least one leg sealed by liquid thereby preventing any mixing of the gases in the various towers. The flow of the acid between the towers is substantially self-regulating and requires no pumps.
摘要翻译： 在用于生产硫酸的双吸收接触方法中，空气干燥塔和/或二氧化硫干燥塔的贮槽与中间吸收塔的贮槽串联连接，而中间吸收塔的贮槽又与 最终的吸收塔。 塔之间的连接由具有至少一个由液体密封的腿的溢流管实现，从而防止各种塔中气体的任何混合。 塔之间的酸流量基本上是自调节的，不需要泵。
-
公开(公告)号：US3684440A
公开(公告)日：1972-08-15
申请号：US3684440D
申请日：1970-04-22
发明人： STAUFFER ADOLF
CPC分类号： C01B17/76
摘要： IN A CONTACT PROCESS FOR THE PRODUCTION OF SULFURIC ACID, SAID PROCESS COMPRISING THE STEPS OF: (A) COOLING HOT SO2-CONTAINING FEED GAS BY DIRECT OR INDIRECT HEAT EXCHANGE WITH A COOLING LIQUID; (B) CONVERTING SAID SO2-CONTAINING GAS TO AN SO3-CONTAINING GAS IN A CONTACT REACTOR; (C) ABSORBING SO3 FROM SAID SO3-CONTAINING GAS WITH CONCENTRATED SULFURIC ACID IN AN ADSORPTION TOWER; AND (D) WITHDRAWING A WASTE GAS FROM SAID ABSORPTION COLUMN, SAID WASTE GAS BEING SUBSTANTIALLY FREE OF WATER VAPOR, SULFUR TRIOXIDE AND CONTAINING A MINOR AMOUNT OF SULFUR DIOXIDE, AND HAVING A TEMPERATURE OF ABOUT 30-70*C. AS IT IS WITHDRAWN FROM THE ABSORPTION TOWER, THE IMPROVEMENT COMPRISING: EMPLOYING SAID WASTE GAS AS A COOLING MEDIUM FOR SAID COOLING LIQUID, SAID COOLING LIQUID BIENG COOLED BY EVAPORATIVE COOLING INTO SAID WASTE GAS. THIS PROCESS IS ESPECIALLY APPLICABLE TO PLANT SITES HAVING HUMID WEATHER OR INSUFFICIENT COLD COOLING WATER.
-
4.发明授权
公开(公告)号：US3650906A
公开(公告)日：1972-03-21
申请号：US3650906D
申请日：1969-04-14
IPC分类号： C07C51/573 , B01D1/22 , B01D3/00
CPC分类号： C07C51/573 , C07C63/16
摘要： In the preliminary purification (prior to distillation) of crude phthalic anhydride produced from xylene, the pretreatment is improved by heating a thin film of molten phthalic anhydride to 200-280* C. during the course of not more than 60 seconds, said film having a thickness of not more than 2 mm.
摘要翻译： 在由二甲苯制备的粗制邻苯二甲酸酐的初步纯化（在蒸馏之前），通过在不超过60秒的过程中将熔融的邻苯二甲酸酐的薄膜加热至200-280℃来改善预处理，所述的膜具有 厚度不大于2mm。
-
5.发明授权
公开(公告)号：US3907979A
公开(公告)日：1975-09-23
申请号：US35972673
申请日：1973-05-14
发明人： JENNIGES ERNST
IPC分类号： C01B17/76 , C01B17/765 , C01B17/54
CPC分类号： C01B17/7655 , Y02P20/129
摘要： This invention relates to a process for the production of sulfuric acid from sulfur and technical oxygen or oxygen-enriched air by sulfur combustion and contact oxidation of the sulfur combustion gas.
摘要翻译： 本发明涉及通过硫燃烧气体的硫燃烧和接触氧化从硫和工业氧气或富氧空气生产硫酸的方法。
-
公开(公告)号：US3773902A
公开(公告)日：1973-11-20
申请号：US3773902D
申请日：1971-05-26
发明人： NEUMANN U
CPC分类号： C01D7/07
摘要： AN ECONOMICALLY FEASIBLE CONTINUOUS PROCESS FOR THE PRODUCTION OF POTASSIUM CARBONATE BY THE CARBONATION OF A POTASSIUM HYDROXIDE SOLUTION WITH CO2 ON A COMMERCIAL SCALE WHICH IS TROUBLE-FREE AND REQUIRES SIMPLE APPARATUS IN WHICH A STREAM OF THE POTASSIUM HYDROXIDE SOLUTION IS FED TO A REACTION ZONE WHERE IT IS REACTED WITH CO2 AT 80-135*C. AND 130 TORR-ATMOSPHERIC PRESSURE; SUFFICIENT WATER IS EVAPORATED FROM THE SOLUTION IN THE REACTION ZONE TO PRECIPITATE K2CO3-1 1/2H2O; A STREAM OF THE PRECIPITATED POTASSIUM CARBONATE AND A PORTION OF THE SOLUTION IS REMOVED FROM THE REACTION ZONE AS A SLURRY; THE LIQUID AND SOLID PHASES OF THE SLURRY ARE SEPARATED; AND THE SEPARATED LIQUID PHASE IS RECYCLED TO THE REACTION ZONE, PREFERABLY AFTER HEATING TO A TEMPERATURE ABOVE THAT OF THE REACTION ZONE.
-
7.发明授权
公开(公告)号：US3725211A
公开(公告)日：1973-04-03
申请号：US3725211D
申请日：1972-03-01
发明人： GEHRKEN H , HELMS G , KEUNECKE G , KRIMPHOVE H
IPC分类号： B01D3/14 , C07C51/573 , C07C63/18
CPC分类号： B01D3/146 , C07C51/573 , Y10S203/20 , C07C63/16
摘要： A PROCESS FOR CONTINUOUS DISTILLATION PURIFICATION OF PHTHALIC ANHYDRIDE WITHIN PREHEATED PHTHALIC ANHYDRIDE IS FED TO THE MIDDLE SECTION OF A DISTILLATION COLUMN OPERATED UNDER A SUMP PRESSURE OF ABOUT 500-800 MM. HG, FORERUNNINGS CONTAINING MORE VOLATILE COMPONENTS ARE CONTINUOUSLY SEPARATED AT THE HEAD OF THE COLUMN, A RESIDUE CONTAINING HIGHER-BOILING CONTAMINATES IS WITHDRAWN FROM THE SUMP, AND A SIDESTREAM OF PURIFIED PHTHALIC ANHYDRIDE HAVING A PURITY OF 99.1 TO 99.95% BY WEIGHT IS REMOCED IN THE VAPOR PHASE FROM THE LOWER PART OF THE COLUMN STRIPPING SECTION. FURTHER PURIFICATION MAY BE OBTAINED BY PASSING THE PURIFIED SIDESTREAM PRODUCT INTO A SMALL VACUUM DISTILLATION COLUMN.
-
8.发明授权
公开(公告)号：US3670769A
公开(公告)日：1972-06-20
申请号：US3670769D
申请日：1970-06-30
CPC分类号： B01D3/4211 , Y10T137/87788
摘要： The reflux ratio of an industrial distillation column can be accurately varied in a programmed manner by passing the distillate through a reflux ratio regulator having an elongate housing having an elongate fluid inlet in a side wall thereof, a partition fitted axially in the housing perpendicular to the axis of the inlet and movable axially between the ends of the inlet; a first fluid outlet positioned on one side of the partition; a second fluid outlet positioned on the other side of the partition; means for varying the position of the partition along the inlet during the distillation, so that the partition divides the stream of distillate entering the housing in a varying ratio into two streams, one being withdrawn as distillate and the other being returned as reflux; and, optionally, a liquid stream divider downstream of the reflux ratio regulator comprising an elongate housing having in the side walls thereof a fluid inlet connected to one of the fluid outlets of the reflux ratio regulator and two fluid outlets, one connected to the head of the distillation column and one to means for collecting the product; a weir with a plurality of overflow indents in its upper edge positioned axially in said housing between the fluid inlet and the fluid outlets; and a liquid stream dividing wall mounted transversely in said housing and mounted perpendicularly to the weir, so that the stream of liquid flowing over the weir is divided by the dividing wall into two streams, one of which exists through the first fluid outlet and the other stream exits through the second fluid outlet.
摘要翻译： 工业蒸馏塔的回流比可以通过使馏出物通过具有细长壳体的回流比调节器而以编程的方式精确地变化，该细长壳体在其侧壁中具有细长的流体入口，轴向在壳体中轴向安装在垂直于 入口的轴线并在入口的端部之间轴向移动; 位于隔板一侧的第一流体出口; 位于隔板另一侧的第二流体出口; 用于在蒸馏期间沿着入口改变隔板的位置的装置，使得隔板将进入外壳的馏出物流以不同比例分成两股，一个作为馏出物取出，另一个作为回流返回; 并且可选地，在回流比调节器下游的液流分配器包括细长壳体，其在其侧壁中具有连接到回流比调节器的一个流体出口的流体入口和两个流体出口，一个连接到 蒸馏塔和一个用于收集产品的装置; 在其上边缘处具有多个溢流凹口的堰，其位于所述壳体中轴向位于流体入口和流体出口之间; 以及横向安装在所述壳体中并垂直于堰安装的液体流分隔壁，使得流过堰的液体流被分隔壁分成两股流，其中一个流经第一流体出口和另一个存在 流通过第二流体出口流出。
-
公开(公告)号：US3655521A
公开(公告)日：1972-04-11
申请号：US3655521D
申请日：1969-03-27
IPC分类号： C07D307/89 , C07C51/573 , B01D3/06 , C07C63/18
CPC分类号： C07C51/573 , Y10S203/13 , C07C63/16
摘要： Crude liquid phthalic anhydride produced from the catalytic air oxidation of o-xylene, and containing minor quantities of acids such as phthalic acid and in addition, compounds more volatile than phthalic anhydride, is subjected to a special pretreatment to remove the acids and the more volatile materials, said pretreatment having a relatively short residence time and comprising heating said crude liquid phthalic anhydride under a first pressure in the liquid phase to a temperature of about 235*-330* C for a sufficient time to convert said phthalic acid to phthalic anhydride and then expanding said heated liquid to a lower pressure than said first pressure to volatilize gases containing at least a portion of said more volatile substances and simultaneously cool resultant liquid to a temperature lower than the boiling point of phthalic anhydride at said lower pressure.
摘要翻译： 由邻二甲苯的催化空气氧化产生的粗液体邻苯二甲酸酐，并含有少量酸如邻苯二甲酸，另外还含有比邻苯二甲酸酐更易挥发的化合物，经过特殊的预处理以除去酸，并且挥发性更高 所述预处理具有相对较短的停留时间，并且包括在液相中的第一压力下将所述粗液体邻苯二甲酸酐加热至约235-330℃的温度足够的时间以将所述邻苯二甲酸转化为邻苯二甲酸酐， 然后将所述加热的液体膨胀到比所述第一压力低的压力，以使含有至少一部分所述更易挥发物质的气体挥发，同时将所得液体在所述较低压力下冷却至低于邻苯二甲酸酐沸点的温度。
-
公开(公告)号：US3275407A
公开(公告)日：1966-09-27
申请号：US22008362
申请日：1962-08-28
发明人： HERBERT FURKERT , ROSINA SCHERTZ
CPC分类号： C01C1/12 , C01B17/504 , C01B17/58 , C01C1/028
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.013 秒)
