54results about How to "Promote dehydrogenation" patented technology

A preparation method of gallium-containing zeolite and its application in coal pyrolysis volatilization modification. Water, microporous template agent, NaOH and mesoporous template agent are made into a solution, and silicon source is added drop by drop, and stirred after dropping After the silicon source is hydrolyzed and dispersed, the gallium source and the aluminum source are added, and after aging, it is crystallized at 100-180°C for 2-6 days. After crystallization and roasting, ammonium nitrate ion exchange is performed, and then roasted after drying to obtain a multi-level MFI skeleton. Porous gallium-containing zeolite; the gallium-containing zeolite of the present invention can reduce the carbon deposition and deactivation of the catalyst to a certain extent; for various substances contained in coal pyrolysis volatiles, the weak acid sites formed by the framework gallium and the extra-framework gallium can be combined with molecular sieves Si‑OH‑Al (strong B acid site) can promote the dehydrogenation, cracking, oligomerization and aromatization of macroalkanes, and the formed olefins can be 2 o 3 Activation of CH under the action of 4 , to promote the conversion of methane to long-chain olefins and aromatics.

The invention relates to a preparation method of tetraene intermediates. According to the preparation method, a first compound is converted by Nocardioides simplex to obtain tetraene intermediates; wherein the first compound is represented by a formula I, tetraene intermediates are represented by a formula II, and R in the formula I and the formula II represents H, a halogen atom, an alkyl group,an alkoxyl group, a hydroxyl group, or a phenyl group. According to the preparation method, the first compound is taken as the substrate, only Nocardioides simplex is used to carry out biological conversion; the substrate is subjected to 1,2-dehydrogenation and 21-acetate hydrolysis at the same time; most of the conversion products is target products, the byproduct ratio is low; after purification, the product is white or white-like crystals; relative to the weight of the substrate, the yield is 80-90%; the target product yield is high; through HPLC analysis, the purify of the product is not less than 95%; and the total content of target products and secondary products is not less than 99%.

The invention provides a method, product and application for preparing a propylene production increasing additive by utilizing Fischer-Tropsch synthesis catalyst fine powder, the method comprising the following steps: (1) mixing and stirring silica sol, kaolin and water, adding phosphoric acid solution, and mixing , to obtain slurry A; (2) adding ZSM‑5 molecular sieve and Fischer-Tropsch synthesis catalyst fine powder to the slurry A, mixing, and filtering to obtain slurry B; (3) pressurizing the slurry B Afterwards, spray drying is carried out to obtain the finished product of the propylene production-increasing auxiliary agent. The invention utilizes the Fischer-Tropsch synthesis catalyst fine powder and the ZSM-5 molecular sieve to synergistically strengthen the effect of the auxiliary agent for increasing the production of propylene and increase the yield of propylene in the liquefied gas.

The invention relates to a method for preparing a steroidal drug intermediate. The method comprises the steps that microbial conversion is conducted on a first compound with Nocardioides simplex to obtain the steroid drug intermediate, the first compound is shown as a formula I, the steroidal drug intermediate is as shown in a formula II, and in the formula I and the formula II, R is H, a halogenatom, an alkyl group, an alkoxy group, a hydroxyl group or a phenyl group. The method selects 4, 9 (11)-pregnant-17-hydroxy group-3,20 dioxin-21-acetate as a substrate, uses only the Nocardioides simplex for biotransformation, dehydrogenation at position 1,2 and hydrolysis of acetate at position 21 are simultaneously conducted on the substrate, 1,4,9 (11)-pregnene-17,21-diol-3,20-dione is obtained, products formed through transformation are mainly the 1,4,9(11)-pregnene-17,21-diol-3,20-dione, the proportion of by-products is low, the purified products are white or off-white crystals, relativesubstrate weight yield is 75%-85%, a target product yield is high, after a HPLC analysis, the purity is >=99%, and external standard content is 98%.