Abstract:
The present disclosure relates to a composition that includes a perovskite crystal having a ferroelectric domain aligned substantially parallel to a reference axis. In some embodiments of the present disclosure, the perovskite crystal may include ABX3, where A is a first cation, B is a second cation, and X is an anion. In some embodiments of the present disclosure, A may include an alkyl ammonium cation. In some embodiments of the present disclosure, B may include a metal element. In some embodiments of the present disclosure, the metal element may include lead. In some embodiments of the present disclosure, X may include a halogen. In some embodiments of the present disclosure, the perovskite crystal may include methylammonium lead iodide.
Abstract:
Uses are disclosed for a new crystalline molecular sieve designated SSZ-102 synthesized using an N,N'-dimethyl-1,4-diazabicyclo[2.2.2]octane dication as a structure directing agent. SSZ-102 has ESV framework topology.
Abstract:
A method of preparing a porous graphene oxide material. The method includes the steps of: (1) preparing graphene oxide sheets from graphite at 40 to 170 °C; (2) providing a graphene oxide suspension containing the graphene oxide sheets; (3) heating the graphene oxide suspension with a base at 25 to 300 °C for 0.1 to 48 hours to obtain base-treated graphene oxide sheets; and (4) heating a mixture of the base-treated graphene oxide sheets and an acid at 25 to 300 °C for 0.1 to 48 hours to yield the porous graphene oxide material. Also disclosed are novel porous graphene oxide materials and methods of using these materials as catalysts.
Abstract:
The present invention is directed to processes using a new crystalline molecular sieve designated SSZ-81, which is synthesized using a structure directing agent selected from 1,5-bis(1-azonia-bicyclo[2.2.2]octane)pentane dications, 1,5-bis(1,4-diazabicyclo[2.2.2]octane)pentane dications, and mixtures thereof.
Abstract:
The present invention is directed to processes using new crystalline molecular sieve designated SSZ-79 synthesized using 1,8-dimethyl-1,4,8,11-tetraazacyclotetradecane or 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane as a structure directing agent.
Abstract:
An apparatus and method for converting hydrazine, substituted hydrazines and/or other nitrogen-containing explosive materials, particularly unsymmetric dimethyl hydrazine (UDMH), to ammonia or ammonia and the corresponding amines by hydrogenation are disclosed. The hydrazines are diluted with a suitable carrier fluid, preferably water, mixed with hydrogen, then hydrogenated in a catalyst reactor, followed by separation of the commercially valuable ammonia and amines. Separated carrier fluid and hydrogen gas may be recycled into the process to conserve energy and reduce waste. Recycled carrier fluid may be used to preheat the diluted hydrazine prior to hydrogenation. Ammonia may be dissociated and the resultant hydrogen recycled into the hydrogenation process. The apparatus is sized for disassembly and transport for shipping to hydrazine disposal sites.
Abstract:
In the present method of producing tertiary amine-sulphur trioxide complexes of the general formula: R3N:SO3, where R is a methyl, ethyl, or propyl group or a moiety of a heterocyclic ring in pyridine, chlorosulfonic acid is added to dissolve a tertiary amine in a chlorinated organic solvent. To recover amine from amine hydrochloride previously formed as by-product, gaseous ammonia is passed into the reaction mixture. This measure makes it possible to increase the yields considerably. Ammonium chloride is formed as by-product.
Abstract:
본 발명은 음이온 중합개시제의 제조방법, 제조장치 및 이로부터 제조되는 음이온 중합개시제에 관한 것으로, 본 발명에 따른 음이온 중합개시제의 제조방법은 연속식 반응기에, 화학식 1 및/또는 화학식 2의 아민화합물; 유기금속 화합물; 및/또는 공액디엔 화합물을 용액 형태로 투입하여 반응시키는 것을 특징으로 한다. [화학식 1] [화학식 2] (상기 화학식 1에서 R1, R2, R3, R5, R6, R7, R8 및 R9는 독립적으로 수소 또는 탄소수 1 내지 6의 알킬기를 나타내고, Ra 및 Rb는 독립적으로 수소 또는 탄소수 1 내지 5의 알킬기를 나타내며, n 및 m은 0 내지 20의 정수이다. 또한 화학식 2에서 R11, R12, R13 및 R14는 독립적으로 수소, 탄소수 1 내지 6의 알킬기, 탄소수1 내지 6의알케닐기 또는 탄소수 1 내지 6의 알카이닐기를 나타내고, X1, X2, X3, X4 및 X5는 독립적으로 질소 또는 탄소를 나타내되, 적어도 하나는 질소이며, a는 0 내지 20의 정수이다.)