32results about How to "Control decomposition" patented technology

The invention relates to a preparation method and an activating reactor for granular potassium-containing humic acid urea. The preparation method comprises the steps that granular urea, weathered coal or lignite, and a catalyst perform an activating reaction in the activating reactor; then potassium chloride or potassium sulfate is added simultaneously; and cooling, grinding and granulation are performed, so that a granular potassium-containing humic acid urea fertilizer is prepared. A heat transfer jacket is arranged between an inner tank and an outer tank of the activating reactor; three agitating shafts are arranged in the tank body; an interlayer is arranged on the side wall of each agitating shaft; each helical blade adopts a hollow structure inside; and the heat transfer jacket, the heat transfer interlayers and the hollow structures of the helical blades are all filled with heat transfer fluid. According to the preparation method and the activating reactor, the heating temperature is uniform and stable, the activating reaction time is short, continuous reaction can be achieved, the reaction is sufficient and the activation is thorough, the reaction time for the whole production process is saved, urea is not needed to grind or melt, and energy consumption is reduced greatly.

The invention relates to a method for biologically testing chemoreception potential of plant root system secretions, belonging to the field of biological test technology.The method comprises the following steps: preparing agar liquid with a concentration less than or equal to 0.3% with water; sterilizing the agar liquid and pouring the agar liquid into a culture dish; disinfecting the donor plantand sowing the donor plant in the culture dish; sealing the culture dish, keeping the culture dish in a culture room with a temperature of 25-28 DEG C for 12 hours and culturing for 10-14 days in thebright / dark environment; removing all plants to be tested from the 11th day to the 15th day; disinfecting the receptor plant and sowing the receptor plant in the culture dish with the donor plant removed; sealing the culture dish, keeping the culture dish in a culture room with a temperature of 25-28 DEG C for 12 hours and culturing for 5-7 days in the bright / dark environment; then taking out thereceptor plant to measure growth amount thereof and growth amount of the receptor plant not affected by the donor plant; calculating influence of the plant root system secretions on the growth of thereceptor plant according to the measured growth amount to carry out chemoreception potential assessment.The invention is characterized by excluding competition among plant species for water and nutrient and fully reflecting effects the donor plant root system secretions have on the receptor plant.

According to the first embodiment of the present invention, an oxide of a hydrocarbon compound can be produced with high yield and high productivity by oxidizing the hydrocarbon compound with molecular oxygen in the co-presence of an N-hydroxy compound, such as methyl ethyl ketone or N-hydroxysuccinimide, and a phosphate ester, such as dibutyl phosphate. According to another embodiment of the present invention, an oxide of a hydrocarbon compound can be produced with high yield by using an oxidation catalyst that comprises an oxime compound, such as methyl ethyl ketone. According to another embodiment of the present invention, an alcohol and / or a ketone can be produced with high yield by oxidizing the hydrocarbon compound at a temperature of 160 DEG C. or less, and by decomposing the resulting hydroperoxide, for example, in a unit having an inner surface formed by a material from which no transition metal ion is generated.

The invention discloses a catalyst for side-chain alkylation of toluene and methanol and a preparation method for styrene. The catalyst comprises: an ordered mesoporous molecular sieve catalyst and an oxygen-free methanol dehydrogenation catalyst; the ordered mesoporous molecular sieve catalyst doped with alkali metal ions. On the one hand, the catalyst utilizes the good dehydrogenation performance of the methanol anaerobic dehydrogenation catalyst to produce formaldehyde as a real alkylation agent; on the other hand, it utilizes the excellent side chain alkylation performance of the alkali metal ion-modified mesoporous molecular sieve catalyst, The products styrene and ethylbenzene are obtained, thereby obtaining higher conversion rate of toluene and selectivity of styrene-ethylbenzene. Another aspect of the present invention also provides a styrene preparation method using the catalyst.

The invention discloses a method for extracting platycladus orientalis (L.) franco essential oil through microorganism system fermentation and belongs to the field of biological extraction. The method comprises the steps of smashing a platycladus orientalis (L.) franco raw material into wood bits, adding water to adjust moisture content of the wood bits, adding mycotic spore powder, then adding cane sugar and yeast extractive, evenly mixing, aerating at intervals and stirring to ferment; finally performing steam distillation on the fermented platycladus orientalis (L.) franco raw material to extract essential oil and collecting oil to obtain platycladus orientalis (L.) franco essential oil. The method disclosed by the invention has a simple technology, utilizes characteristics that specific mould resolves fiber and a wooden structure to control a decomposition effect of effective microorganism and accordingly effectively improves the extracting rate of the platycladus orientalis (L.) franco essential oil; the yield of the platycladus orientalis (L.) franco essential oil is 10% to 15% and is far higher than yield as 1% to 4% of a general extracting method; the content of a main functional ingredient alpha-cedrol in the essential oil is about 100% higher than that of the general steam distillation method; the method has strong operability, is suitable for large-scale production, improves the yield of the platycladus orientalis (L.) franco essential oil and is suitable for extracting essential oil from varieties of sources and portions of the latycladus orientalis (L.) franco raw material.

The invention provides a preparation method of a vitamin K2 compound. The preparation method comprises the following steps that a compound shown by the formula 2, a carbonyl protective agent and a bromination agent undergo a reaction to produce a compound shown in the formula 3; the compound shown in the formula 3 and a long-chain olefin metal compound undergo a reaction in the presence of catalysts to produce a compound shown in the formula 4; and the compound shown in the formula 4 reacts under an acid catalysis condition to produce a compound shown in the formula 1, wherein n represents an integer of 0 to 10, such as 1, 3, 6 or 8; and R represents C1-C4 of O,O-, O,S- and S,S-ketal and acetal (comprising annular ketal and acetal), O,O,O-orthoester, O,S,S-orthoester, S,S,S-orthoester, alkenyl ether, sulfo-alkenyl ether and enamine. The preparation method has the advantages of mild reaction conditions, less side reactions, poor product decomposability, relatively simple deprotection reaction conditions and high yield.

The invention discloses original pulp beer and a preparation method thereof. The preparation method of the original pulp beer comprises blending of raw materials and improving of processes, wherein big and small wheat malts with specific lower basin values combining burnt malts with different color gradients are selected as main brewing raw materials, so that a liquor body is endowed with the characteristics of durability, turbidity, and outstanding malt fragrance; the processes comprise saccharification high-temperature blanking, a protein-free hydrolysis time direct high-temperature saccharification process, a full fragrant flower adding process adopted in a boiling step and a precipitating step at the same time, and a pericarpium citri reticulatae powder and coriander powder adding process combined with a specific yeast and sterilizing process in the precipitating step, so that the original pulp beer is mellow in taste, gentle in bitter taste, high in excitant, durable and turbid in the liquor body, and rich in malt fragrance and flor fragrance, has a mild pericarpium citri reticulatae fragrance and a coriander fragrance at the same time, is good in foam retention and slow in foam retention attenuation.

The invention discloses a preparation method of pomegranate seed oil. The method comprises the following steps: taking fresh pomegranate seeds, removing impurities and rotten and bad pomegranate seeds, and grinding to remove 10-40% of pomegranate seed peel; uniformly spreading pure water to the pomegranate seeds subjected to peel grinding to adjust the water content of the pomegranate seeds to 5-15 wt%; squeezing the pomegranate seeds in a squeezer to obtain raw oil, wherein the squeezing temperature is controlled at 40-100 DEG C; and adding a filter aid, which accounts for 0.5-2 wt% of the raw oil, into the raw oil, stirring uniformly, and filtering to obtain the pomegranate seed oil. The preparation method has the advantages of simpleness, favorable effect, fewer impurities in the product, and low production cost, effectively controls the decomposition of punicic acid, lowers the generation of harmful substances, does not need the high-temperature refinement processes of decolorization, deacidification, deodorization and the like, and is convenient for industrial production.

The invention discloses a composite catalyst for producing styrene by side-chain alkylation of toluene and methanol, and a method for preparing styrene. The catalyst comprises: a basic molecular sieve catalyst and a loaded boron catalyst. When the composite catalyst is used in the side chain alkylation reaction of toluene and methanol, it can effectively control the decomposition of methanol and the hydrogen transfer reaction between styrene and methanol during the reaction process, inhibit the production of ethylbenzene, and obtain a higher conversion of toluene rate and styrene selectivity. Another aspect of the present invention also provides a styrene preparation method using the catalyst.

The invention discloses a preparation method for a heat-sensitive medicament suspension, which comprises the following steps of: adding a heat-sensitive medicament, a suspending agent and other auxiliary materials into a low-temperature ball mill, and sealing the low-temperature ball mill; and after crushing, mixing and uniformly dispersing the materials in the low-temperature ball mill, filing the mixture and sterilizing the mixture. In the preparation method, parameters, such as work temperature, grinding strength and grinding time can be adjusted according to the thermal stability and the granularity of the heat-sensitive medicament, the temperature of the materials is effectively controlled under the condition of ensuring to reach a target granularity, and the decomposition and the deterioration of the heat-sensitive medicament are prevented. In addition, in the method, a plurality of procedures can be finished at one time by synchronously crushing, mixing and uniformly dispersing, the problem of frequent transferring needed by the plurality of procedures of the traditional preparation process is avoided, and the pollution control links of the product are reduced.