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公开(公告)号：US5034209A
公开(公告)日：1991-07-23
申请号：US508699
申请日：1990-04-13
摘要： Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula(I):M.sub.a X.sub.b (I)wherein M means boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.
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公开(公告)号：US5112580A
公开(公告)日：1992-05-12
申请号：US525724
申请日：1990-05-21
摘要： Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula (I):M.sub.a X.sub.b (I)wherein M can be boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.
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公开(公告)号：US4956169A
公开(公告)日：1990-09-11
申请号：US169951
申请日：1988-03-18
摘要： Chlorine is produced by reacting hydrogen chloride and oxygen in the presence of a chromium oxide catalyst in a reactor whose catalyst-contacting part is lined with one of lining materials represented by the following general formula (I):M.sub.a X.sub.b (I)wherein M means boron, aluminum, silicon, titanium, zirconium or chromium, X denotes oxygen, nitrogen or carbon, a is an integer of 1-2 and b stands for an integer of 1-3 or with a mixture of at least two of the lining materials. The above process and reactor are effective in maintaining the activity of the catalyst.
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公开(公告)号：US4803065A
公开(公告)日：1989-02-07
申请号：US64699
申请日：1987-06-22
CPC分类号： B01J23/26 , C01B7/04 , Y02P20/228
摘要： An improved process is provided for the production of chlorine. In a fluidized-bed reactor having a specific equivalent diameter and made of a material with a particular iron content, hydrogen chloride and oxygen are reacted in particular gas volumes and at specific molar ratio, superficial velocity, temperature and pressure in the presence of a catalyst composed principally of a chromium oxide and having a specific particle size distribution. The catalyst is filled in a specific amount in terms of catalyst layer height at rest. The catalyst can retain its high activity.
摘要翻译： 提供了一种用于生产氯的改进方法。 在具有特定当量直径并由具有特定铁含量的材料制成的流化床反应器中，氯化氢和氧气在特定的气体体积下以特定的摩尔比在表面速度，温度和压力下在催化剂存在下反应 主要由氧化铬组成并具有特定的粒度分布。 以催化剂层的静置高度，催化剂以特定的量填充。 催化剂可以保持其高活性。
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公开(公告)号：US4774070A
公开(公告)日：1988-09-27
申请号：US13426
申请日：1987-02-11
CPC分类号： C01B7/04 , C01B7/0743
摘要： Chlorine is produced by oxidizing byproduced hydrogen chloride. An offgas containing hydrogen chloride as a byproduct is reacted with oxygen at 300.degree.-500.degree. C. in the presence of a catalyst which contains chromic oxide (Cr.sub.2 O.sub.3) as a principal component. The resulting gas is cooled rapidly and then washed with water to recover vaporized chromium. The hydrogen chloride is then absorbed in water to recover it as an aqueous hydrochloric acid solution. The still remaining portion of the resultant gas is washed with sulfuric acid to remove water from the same, followed by compression and cooling. The resulting liquefied chlorine is separated. The still remaining gas composed principally of oxygen is thereafter returned to the oxidation step.
摘要翻译： 通过氧化副产生的氯化氢产生氯。 在含有氧化铬（Cr 2 O 3）作为主要成分的催化剂的存在下，将含有氯化氢作为副产物的废气在300-500℃下与氧气反应。 将所得气体快速冷却，然后用水洗涤以回收蒸发的铬。 然后将氯化氢吸收在水中，以盐酸水溶液的形式回收。 所得气体的剩余部分用硫酸洗涤以从其中除去水，然后压缩和冷却。 所得到的液化氯被分离。 然后主要由氧气组成的剩余气体返回氧化步骤。
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公开(公告)号：US4922005A
公开(公告)日：1990-05-01
申请号：US797457
申请日：1985-11-13
申请人： Masanobu Ajioka , Makoto Aiga , Masafumi Kataita , Akihiro Tamaki
发明人： Masanobu Ajioka , Makoto Aiga , Masafumi Kataita , Akihiro Tamaki
IPC分类号： C07C263/10
CPC分类号： C07C263/10
摘要： Hexamethylene diisocyanate (HDI) is prepared by introducing a hexamethylenediamine (HDA) solution and an equivalent amount or more of hydrogen chloride gas simultaneously into a turbulent zone in the vicinity of an agitating blade in an inert organic solvent held under agitation within a tank-shaped reactor and allowing them to undergo a successive salt-forming reaction so as to obtain a high-concentration slurry of hexamethylenediamine hydrochloride (HDA.multidot.HCl) and then reacting the slurry with phosgene. The phosgenation is effected by charging an HDA.multidot.HCl slurry of a high concentration, such as that obtained by the above process, into a tank-shaped reactor held under a pressure above the atmosphere pressure but below 5 kg/cm.sup.2 G and controlling the amount of phosgene, which is to be blown into the reactor, at a level 1-18 molar times per hour the total amount of HDA.multidot.HCl and HDI in the reaction mixture. In a preferred embodiment of the phosgenation, the phosgenation reaction is effected in a continuous two-step tank-shaped reactor while controlling the degree of conversion in the first step within 70-95%. This is a rationalized preparation process of hexamethylene diisocyanate since it requires a shorter overall phosgenation time.
摘要翻译： 六亚甲基二异氰酸酯（HDI）是通过将六亚甲基二胺（HDA）溶液和等当量的氯化氢气体同时引入搅拌叶片附近的湍流区域，在惰性有机溶剂中保持搅拌状态的罐形 反应器中并使它们经历连续的成盐反应，以获得六亚甲基二胺盐酸盐（HDAxHCl）的高浓度浆料，然后使该浆料与光气反应。 光气化是通过将高浓度的HDAxHCl浆料（例如通过上述方法获得的）输送到保持在高于大气压力但低于5kg / cm2G的压力下的罐形反应器中并控制光气的量来实现的， 其将以每小时1-18摩尔倍的速率吹入反应器，反应混合物中的HDAxHCl和HDI的总量。 在光气化的优选实施方案中，光气化反应在连续的两步槽形反应器中进行，同时控制第一步中的转化率在70-95％之内。 这是六亚甲基二异氰酸酯的合理制备方法，因为它需要更短的整体光气化时间。
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公开(公告)号：US4422976A
公开(公告)日：1983-12-27
申请号：US364894
申请日：1982-04-02
IPC分类号： C07C263/00 , C07C263/10 , C07C265/12 , C07C118/02
CPC分类号： C07C263/10
摘要： A two-stage continuous preparation process for organic isocyanates uses a primary amine which is reacted with stoichiometrically excess phosgene at a gauge pressure of 10 Kg/cm.sup.2 or lower and a temperature of 60.degree.-100.degree. C. in an inert organic solvent. Then, the resultant reaction mixture is maintained at a gauge pressure of 10 Kg/cm.sup.2 or lower and a temperature of 120.degree.-160.degree. C. until the reaction is completed.
摘要翻译： 有机异氰酸酯的两阶段连续制备方法使用在惰性有机溶剂中，表压为10Kg / cm 2或更低，温度为60-100℃的化学计量过量的光气使伯胺反应。 然后，将所得反应混合物保持在10Kg / cm 2或更低的表压和120-116℃的温度下，直到反应完成。
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