The present disclosure relates to an ammoxidation catalyst that exhibits excellent activity, reaction conversion rate and selectivity for the ammoxidation reaction of propylene while exhibiting improved stability under a high temperature, and a method for preparing the same, and a method for preparing acrylonitrile using the ammoxidation catalyst.

A catalyst is illustrated, which has 70-90 parts by weight of mica, 1-10 parts by weight of zeolite, 5-15 parts by weight of titanium dioxide, 1-10 parts by weight of aluminum oxide, 1-5 parts by weight of sodium oxide and 1-5 parts by weight of potassium oxide. The present disclosure also illustrates a pyrolysis device using the catalyst, and further illustrates a pyrolysis method using the catalyst and/or the pyrolysis device for thermally cracking an organic polymer.

A catalyst is illustrated, which has 70-90 parts by weight of mica, 1-10 parts by weight of zeolite, 5-15 parts by weight of titanium dioxide, 1-10 parts by weight of aluminum oxide, 1-5 parts by weight of sodium oxide and 1-5 parts by weight of potassium oxide. The present disclosure also illustrates a pyrolysis device using the catalyst, and further illustrates a pyrolysis method using the catalyst and/or the pyrolysis device for thermally cracking an organic polymer.

There is disclosed a process for producing taurine in a molar yield of at least 80% from alkali isethionate, alkali ditaurinate, or alkali tritaurinate by adding excess ammonia and at least of equal molar amount of an alkali hydroxide to a solution comprised of alkali ditaurinate, alkali tritaurinate, or their mixture and subjecting the solution to an ammonolysis to yield a solution comprised of alkali taurinate.

A catalyst for COS hydrolysis includes titanium dioxide and a barium compound supported on the titanium dioxide. The catalyst, when expressing Ba and S in the catalyst in terms of BaO and SO.sub.3, respectively, has a molar ratio of SO.sub.3 to BaO of at least 1. The catalyst converts COS and H.sub.2O in a raw material gas to CO.sub.2 and H.sub.2S.

A catalyst for COS hydrolysis includes titanium dioxide and a barium compound supported on the titanium dioxide. The catalyst, when expressing Ba and S in the catalyst in terms of BaO and SO.sub.3, respectively, has a molar ratio of SO.sub.3 to BaO of at least 1. The catalyst converts COS and H.sub.2O in a raw material gas to CO.sub.2 and H.sub.2S.

The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.

The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.

The present disclosure relates to a hydrothermally stable catalyst composition. The hydrothermally stable supported catalyst composition comprises K.sub.2CO.sub.3 impregnated on an amorphous silica-alumina support. The weight ratio of silica to alumina in the support is in the range of 0.1 to 1.5. The amount of K.sub.2CO.sub.3 is in the range of 5 wt % to 60 wt % with respect to the total catalyst composition. The catalyst composition is characterized by a pore volume in the range of 0.1 cc/g to 0.9 cc/g, a surface area in the range of 40 m.sup.2/g to 250 m.sup.2/g and an attrition index in the range of 2% to 8%. The present disclosure also relates to a process for preparing the catalyst composition. The catalyst composition provides improved hydrothermal stability, attrition resistance, high pore volume and surface area for gasifying carbonaceous feed at low temperature, as compared to a conventional catalyst composition.

The purpose of the present invention is to provide a method for synthesizing ammonia and an apparatus for the method. The method for synthesizing ammonia according to the present invention comprises: a step of melting a metal containing at least an alkali metal; and a step of supplying a hydrogen gas and a nitrogen gas to the molten metal.