摘要:
A process for increasing the production of benzene from a hydrocarbon mixture. A process for producing an aromatic hydrocarbon mixture and liquefied petroleum gas (LPG) from a hydrocarbon mixture, and a solvent extraction process for separating and recovering polar hydrocarbons from a hydrocarbon mixture containing polar hydrocarbons (that is, aromatic hydrocarbons) and nonpolar hydrocarbons (that is, non-aromatic hydrocarbons) are integrated, thereby it is possible to increase the production of benzene.
摘要:
A small cylindrical reformer according to the embodiments of the present invention are suitable for use in the production of hydrogen from fossil fuels for a small fuel cell power plant. In the small cylindrical reformer, a reforming reactor, a water gas shift reactor (high temperature or low temperature), a combustor, a heat exchanger, a steam generator, etc., may be integrated in a single container to form an optimal heat exchanging network, minimize heat loss and optimize heat exchange efficiency. Thereby, the reformer is designed to be easily processed and manufactured and to have a compact size, thus realizing high efficiency, light weight and ease of mass production.
摘要:
Disclosed is a method of preparing ZSM-5 having substantially 100% crystallinity by using variable temperatures in the absence of an organic template, characterized in that a reaction mixture having a molar composition of M2O/SiO2 (M: alkali metal ion) of 0.07-0.14, H2O/SiO2 of 15-42 and SiO2/Al2O3 of 20-100 is nucleated at relatively high temperatures (180-210° C.) and then crystallized at relatively low temperatures (130-170° C.), thus easily controlling a crystal size and a particle size distribution of the ZSM-5.
摘要翻译:公开了一种通过在不存在有机模板的情况下使用可变温度制备具有基本上100%结晶度的ZSM-5的方法,其特征在于具有摩尔组成为M 2 O / SiO 2的反应混合物, 0.07〜0.14的N 2 O 2(M:碱金属离子),15〜42的H 2 O / SiO 2 SUB>和SiO 2, 20-100的较高温度(180-210℃)成核,然后在相对低的温度(130℃)下结晶, 170℃),因此容易控制ZSM-5的晶体尺寸和粒度分布。
摘要:
Carbamate compounds of 2-heteroaryl-1,2-ethanediol are described. The compounds are effective in the treatment of disorders of the central nervous system, especially as anti-convulsive or anti-epileptic agents.
摘要:
Disclosed is a method of preparing an optically pure (R)- or (S)-tetrahydrofuranyl ketone. By such a method, (R)- or (S)-2-tetrahydrofuran amide is converted to (R)- or (S)-2-tetrahydrofuran nitrile through dehydration in the presence of a dehydrating agent and an amine base. Then, thus prepared (R)- or (S)-2-tetrahydrofuran nitrile is nucelophilic addition-reacted with a nucleophile, followed by hydrolyzing, thereby produce (R)- or (S)-tetrahydrofuranyl ketone having high optical purity, while minimizing production of other by-products.
摘要:
O-Carbamoyl-phenylalaninol having substituent at benzene ring, represented by the general formula I, and pharmaceutically useful salts thereof, which are useful for the prophylaxis and treatment of CNS disorder including depression and anxiety, are disclosed: ##STR1## wherein R is lower alkyl containing 1 to 8 carbon atoms, halogen such as F, Cl and I, alkoxy containing 1 to 3 carbon atoms, thioalkoxy containing 1 to 3 carbon atoms, nitro, hydroxy, or trifluorocarbon, and x is an integer of 1 to 3, with a proviso that R is the same or different when x is 2 or 3.
摘要:
The optically pure forms of monocarbamates of halogenated 2-phenyl-1,2-ethanediol and dicarbamates of 2-phenyl-1,2-ethanediol have been found to be effective in the treatment of disorders of the central nervous system, especially as anti-convulsive or anti-epileptic agents.