专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP0832877A3 Ammoxidation method in fluidized-bed reactor 失效
标题翻译：在流化床反应器中Ammoxydierung的方法
公开(公告)号：EP0832877A3
公开(公告)日：1999-01-27
申请号：EP97307483.4
申请日：1997-09-24
申请人： NITTO KAGAKU KOGYO KABUSHIKI KAISHA
发明人： Nakamura, Toshio, c/o Nitto Kagaku Kogyo K.K. , Murata, Hiroshi, c/o Nitto Kagaku Kogyo K.K. , Nishijima, Katsumasa, c/o Nitto Kagaku Kogyo K.K. , Yamaguchi, Masanori, c/o Nitto Kagaku Kogyo K.K. , Sawada, Yoshikazu, c/o Nitto Kagaku Kogyo K.K.
IPC分类号： C07C253/24 , C01C3/02
CPC分类号： C07C253/26 , B01J23/002 , B01J23/8435 , B01J27/198 , B01J27/199 , B01J37/0045 , B01J2523/00 , C01C3/0241 , Y02P20/52 , C07C255/08 , B01J2523/17 , B01J2523/41 , B01J2523/51 , B01J2523/53 , B01J2523/55 , B01J2523/68 , B01J2523/842 , B01J2523/305 , B01J2523/72
摘要： An ammoxidation method in a fluidized-bed reactor, in which, when a starting material to be ammoxidized is ammoxidized by means of vapor-phase catalytic fluidized-bed reaction, the reaction is carried out in a fluidized-bed reactor to which an oxygen-containing gas is fed through feed openings provided at the bottom thereof, and a starting material to be ammoxidized is fed through feed openings provided above the feed openings for the oxygen-containing gas, the distance between the feed openings for the oxygen-containing gas and those for the starting material being from 30 to 250% of the height of a fluidized solid matter in a static state so as to form such a fluidized bed that the density of the fluidized solid matter at the feed openings for the starting material to be ammoxidized is in the range of 50 to 300 kg/m 3 and that the gas velocity is 1 m/s or lower. By this method, the efficiency of contact between catalyst particles and a starting material, and the result of the reaction (the yield of a desired product) are improved. One specific example of the present invention is a method for ammoxidizing methanol, in which, when the vapor-phase catalytic ammoxidation of methanol is carried out in a fluidized-bed reactor to obtain hydrocyanic acid, the reaction is carried out by using, as a catalyst, a metallic oxide containing [I] at least one element selected from the group consisting of iron, antimony, phosphorus and copper, and [II] at least one element selected from the group consisting of vanadium, manganese, molybdenum, tungsten and bismuth, by feeding, to the catalyst bed, an oxygen-containing gas through feed openings provided at the lower part of the reactor, and methanol and ammonia as a water-vapor-containing gas through feed openings provided above the feed openings for the oxygen-containing gas, or by feeding all of or a part of the water vapor to the catalyst bed through feed openings provided below the feed openings for methanol and ammonia, with the molar ratio of water vapor to methanol adjusted to 0.1 to 3. By this method, the reaction can be efficiently carried out even under such reaction conditions that the amount of oxygen or ammonia relative to that of methanol contained in a feed gas is small, and the desired product, that is, hydrocyanic acid, can thus be obtained in high yield and also stably with time.

2. 发明公开

EP0842922A1 Process for producing acrylonitrile 失效
标题翻译： Verfahren zur Herstellung von Acrylnitril
公开(公告)号：EP0842922A1
公开(公告)日：1998-05-20
申请号：EP97308934.5
申请日：1997-11-06
申请人： NITTO KAGAKU KOGYO KABUSHIKI KAISHA
发明人： Nakamura, Toshio, c/o Nitto Kagaku Kogyo K.K. , Arai, Hachiro, c/o Nitto Kagaku Kogyo K.K. , Inaba, Hideyuki, c/o Nitto Kagaku Kogyo K.K. , Yamamoto, Hiroshi, c/o Nitto Kagaku Kogyo K.K.
IPC分类号： C07C253/26
CPC分类号： C07C253/26 , Y02P20/52 , Y02P20/584 , C07C255/08
摘要： In a process for producing acrylonitrile by the ammoxidation of propylene, comprising bringing, in a fluidized-bed reactor, a gas containing propylene, ammonia and molecular oxygen into contact with a highly-active ammoxidation catalyst (this catalyst being one which can attain a rate constant of 2 s -1 or more for the ammoxidation reaction of propylene, assuming that the reaction is a first-order reaction) which is in a state of being fluidized by the gas, the improvement comprising carrying out the ammoxidation under the following conditions:

(a) the superficial gas velocity in the fluidized-bed reactor is maintained at 1 to 10 m/s under such an operation condition that the rate constant of the ammoxidation reaction of propylene is 2 s -1 or more, assuming that the reaction is a first-order reaction;
(b) an area in which the density of fluidized solid matter is 100 kg/m 3 or more is kept in the fluidized-bed reactor at the upstream side thereof; and
(c) a system for recycling the ammoxidation catalyst which has been supplied to the reaction is provided in the fluidized-bed reactor between the upstream side and downstream side thereof, and the recycling catalyst is introduced into the reactor at such a position that the weight ratio of the ammoxidation catalyst present in an area above the introduction position to the ammoxidation catalyst present in an area below the position will be from 2:1 to 99:1.
摘要翻译：在通过丙烯氨氧化制备丙烯腈的方法中，包括在流化床反应器中使含有丙烯，氨和分子氧的气体与高活性氨氧化催化剂接触（该催化剂可以达到速率假定反应是一级反应的丙烯的氨氧化反应的2s -1以上的常数），其处于处于被气体流化的状态下，其改进包括在下列步骤中进行氨氧化条件：（a）在丙烯的氨氧化反应速率常数为2s -1以上的操作条件下，流化床反应器中的表观气体速度保持在1〜10m / s，假定反应是一级反应; （b）在流化床反应器的上游侧保持流化固体物质的密度为100kg / m 3以上的区域; 和（c）在流化床反应器的上游侧和下游侧设置有供给反应的氨氧化催化剂再循环系统，将再循环催化剂导入反应器，存在于导入位置以上的区域中存在的氨氧化催化剂的重量比为位于该位置以下的区域中的氨氧化催化剂的重量比为2:1〜99:1。

3. 发明公开

EP0832877A2 Ammoxidation method in fluidized-bed reactor 失效
标题翻译：韦尔法罕zur Ammoxydierung在einem Wirbelschichtreaktor
公开(公告)号：EP0832877A2
公开(公告)日：1998-04-01
申请号：EP97307483.4
申请日：1997-09-24
申请人： NITTO KAGAKU KOGYO KABUSHIKI KAISHA
发明人： Nakamura, Toshio, c/o Nitto Kagaku Kogyo K.K. , Murata, Hiroshi, c/o Nitto Kagaku Kogyo K.K. , Nishijima, Katsumasa, c/o Nitto Kagaku Kogyo K.K. , Yamaguchi, Masanori, c/o Nitto Kagaku Kogyo K.K. , Sawada, Yoshikazu, c/o Nitto Kagaku Kogyo K.K.
IPC分类号： C07C253/24 , C01C3/02
CPC分类号： C07C253/26 , B01J23/002 , B01J23/8435 , B01J27/198 , B01J27/199 , B01J37/0045 , B01J2523/00 , C01C3/0241 , Y02P20/52 , C07C255/08 , B01J2523/17 , B01J2523/41 , B01J2523/51 , B01J2523/53 , B01J2523/55 , B01J2523/68 , B01J2523/842 , B01J2523/305 , B01J2523/72
摘要： An ammoxidation method in a fluidized-bed reactor, in which, when a starting material to be ammoxidized is ammoxidized by means of vapor-phase catalytic fluidized-bed reaction, the reaction is carried out in a fluidized-bed reactor to which an oxygen-containing gas is fed through feed openings provided at the bottom thereof, and a starting material to be ammoxidized is fed through feed openings provided above the feed openings for the oxygen-containing gas, the distance between the feed openings for the oxygen-containing gas and those for the starting material being from 30 to 250% of the height of a fluidized solid matter in a static state so as to form such a fluidized bed that the density of the fluidized solid matter at the feed openings for the starting material to be ammoxidized is in the range of 50 to 300 kg/m 3 and that the gas velocity is 1 m/s or lower. By this method, the efficiency of contact between catalyst particles and a starting material, and the result of the reaction (the yield of a desired product) are improved.
One specific example of the present invention is a method for ammoxidizing methanol, in which, when the vapor-phase catalytic ammoxidation of methanol is carried out in a fluidized-bed reactor to obtain hydrocyanic acid, the reaction is carried out by using, as a catalyst, a metallic oxide containing [I] at least one element selected from the group consisting of iron, antimony, phosphorus and copper, and [II] at least one element selected from the group consisting of vanadium, manganese, molybdenum, tungsten and bismuth, by feeding, to the catalyst bed, an oxygen-containing gas through feed openings provided at the lower part of the reactor, and methanol and ammonia as a water-vapor-containing gas through feed openings provided above the feed openings for the oxygen-containing gas, or by feeding all of or a part of the water vapor to the catalyst bed through feed openings provided below the feed openings for methanol and ammonia, with the molar ratio of water vapor to methanol adjusted to 0.1 to 3. By this method, the reaction can be efficiently carried out even under such reaction conditions that the amount of oxygen or ammonia relative to that of methanol contained in a feed gas is small, and the desired product, that is, hydrocyanic acid, can thus be obtained in high yield and also stably with time.
摘要翻译：在流化床反应器中的氨氧化方法，其中当通过气相催化流化床反应将待氨氧化的原料进行氨氧化时，该反应在流化床反应器中进行，含氧气体通过设置在其底部的进料口供入，待氧化的原料通过供给含氧气体的进料口上方的供给口供给，含氧气体的供给口和起始材料为静态状态的流化固体物质高度的30〜250％，形成这样一种流化床，使起始材料的进料口处的流化固体物质的浓度被氧化在50〜300kg / m 3的范围内，气体速度为1m / s以下。通过这种方法，提高了催化剂颗粒与原料之间的接触效率和反应结果（所需产物的收率）。本发明的一个具体实例是甲醇氨氧化方法，其中当在流化床反应器中进行甲醇的气相催化氨氧化以获得氢氰酸时，反应通过使用作为催化剂，含有选自铁，锑，磷和铜中的至少一种元素的金属氧化物，以及选自钒，锰，钼，钨和铋中的至少一种元素，通过进料，通过设置在反应器下部的供给开口的含氧气体和通过在含氧气体的进料口上方提供的进料口的甲醇和氨作为含有水蒸汽的气体加入到催化剂床中，或通过在甲醇和氨的进料口下方提供的进料口将全部或部分水蒸气进料到催化剂床上，水蒸气与甲醇佐剂的摩尔比通过这种方法，即使在相对于进料气体中所含的甲醇的氧气或氨的量小的反应条件下，也可以有效地进行反应，并且所需的产物，即，氢氰酸，因此可以高产率并且随时间稳定地获得。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式