Abstract:
A catalyst comprising a platinum group metal (group 10) supported on a carrier, said carrier comprising a silica core and a precipitate layer of comprising a metal oxide, sulfate or phosphate on said core; said catalyst also comprising a rhodium group metal (group 9) supported on said carrier.
Abstract:
Methods and systems for producing isosorbide from biomass are disclosed. In one embodiment, a method of producing isosorbide from biomass may include contacting biomass, a catalyst mixture of a noble metal and a first solid acid, and hydrogen to form a first reaction mixture, and heating the first reaction mixture to form at least one intermediate compound. Further, the intermediate compound is contacted with a second solid acid to form a second reaction mixture, and heating the second reaction mixture to form isosorbide.
Abstract:
The present invention provides a catalyst comprising: a platinum group metal, silver or gold, and a carrier containing niobium or tantalum oxide or niobium or tantalum phosphate, and an oxide other than niobium or tantalum oxide, as well as its use in production of hydrogen peroxide. The invention also relates to a process for producing hydrogen peroxide, comprising reacting hydrogen and oxygen in the presence of the catalyst according to the invention in a reactor, and a process for producing the catalyst according the invention.
Abstract:
A photocatalyst which comprises a compound which has a network structure wherein units constituting an oxygen octahedron or tetrahedron containing a transition or main group metal ion in a d 10 or d 0 electron state and units constituting a PO 4 tetrahedron coupling with the oxygen octahedron or tetrahedron are connected with one another and further contains an alkali metal in addition to the metal ion, for example, A x Nb 2m P 4 O 6m+8 , wherein A is Na, K or Li, X is 2,3 or 4, and m is 3, 3.5 or 4, A x Ta 2m P 4 O 6m+8 , wherein A is Na, K or Li, X is 2,3 or 4, and m is 3, 3.5 or 4, or A 3 In m P m+1 O 4m+4 , wherein A is Na, K or Li ion, m is 1 or 2, and RuO 2 carried on the compound. The photocatalyst can be used for the complete decomposition of water.
Abstract translation:一种光催化剂,其包含具有网络结构的化合物,其中构成含有八面体或四面体的单元,其含有第10或第(d)种电子态的过渡金属离子或主族金属离子,以及 构成与氧八面体或四面体耦合的PO 4 S 4四面体的单元彼此连接,并且除了金属离子之外还含有碱金属,例如A x Sb x 其中A为Na,K或Li,X为2,3或4,m为2或3,其中A为Na,K或Li,X为2,3或4,m为 3,3.5或4,A x b> Ta <2m b> s> 4 u> s> 6m + 8b,其中A是Na, K或Li,X为2,3或4,m为3,3.5或4,或者为3≤n≤n≤n≤n≤n≤b≤3 其中A是Na,K或Li离子,m是1或2,并且RuO 2 b 2带在化合物上。 光催化剂可用于水的完全分解。
Abstract:
Hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof are dehydrated using a catalyst and a method to produce bio-acrylic acid, acrylic acid derivatives, or mixtures thereof. A method to produce the dehydration catalyst is also provided.
Abstract:
Methods for catalytically dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed monophosphates.
Abstract:
Catalysts for dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity, short residence time, and without significant conversion to undesired side products, such as, for example, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed protonated monophosphates. Methods of preparing the catalysts are also provided.
Abstract:
The present invention is generally directed to a nanocomposite catalyst material for electrochemical devices such as fuel cells, comprising metal nanoparticles impregnated on a conductive support that is coated with a transition metal compound. The metal nanoparticles may comprise platinum; the metal phosphate may comprise tantalum oxyphosphate, niobium oxyphosphate, tantalum oxide, niobium oxide, or any combination thereof; and the conductive support may comprise carbon. In addition, the present invention provides for a method of making the catalyst material.
Abstract:
Chemical production processes are provided than can include exposing a reactant composition to a catalyst composition to form a product composition, with the reactant composition including a multihydric alcohol compound and product composition including a carbonyl compound. The catalyst composition can include one or more elements of groups 5 and 6 of the periodic table of elements. Catalyst compositions are provided that can include one or more of niobia, hydrated niobia, tungstic acid, phosphotungstic acid, and phosphomolybdic acid.
Abstract:
본 발명은 글리세린 탈수반응용 촉매, 이의 제조 방법 및 아크롤레인의 제조 방법에 관한 것이다. 보다 상세하게는 상기 글리세린 탈수반응용 촉매는 글리세린 탈수반응에서 부산물의 생성을 최소화하여 아크롤레인의 선택도를 개선할 수 있고, 반응 동안 촉매 활성을 높게 유지할 수 있다.