40results about How to "Moderate reaction time" patented technology

The invention provides a method for circulating a cold regenerated catalyst and application thereof. A regenerated catalyst from a regenerator is cooled by a catalyst cooler to between 200 and 720DEGC, and is not mixed with a hot regenerated catalyst to directly enter a riser reactor, or is mixed with another part of uncooled hot regenerated catalyst into a mixed regenerated catalyst of which thetemperature is not lower than that of the regenerator to enter the riser reactor; and a hydrocarbon raw material undergoes contact reaction with the catalyst in the riser reactor, the reaction material flow enters a settler for the separation of the catalyst and oil gas, the separated catalyst to be regenerated is subjected to steam stripping in a steam stripping section, and then enters the regenerator for coke burning regeneration, and the regenerated catalyst is cooled and returns to the riser reactor for recycling. The method for circulating the cold regenerated catalyst has wide application, can be used for various fluid catalytic cracking processes comprising resid fluid catalytic cracking, wax oil catalytic cracking, gasoline catalytic conversion upgrading and the like, and also can be sued for other gas-solid reaction processes comprising residual oil pretreatment, fluid coking and the like.

The invention provides a method for catalytic conversion of heavy oil, which comprises a fluidized catalytic conversion process that: heavy hydrocarbon raw materials contacts a catalyst in a riser reactor or fluidized bed reactor to react; the reaction temperature is 400 to 650 DEG C (preferably 480 to 560 DEG C); the reaction pressure is 0.11 to 0.4MPa; the contact time is 0.05 to 5 seconds (preferably 0.1 to 3 seconds); and the weight ratio of the catalyst to the raw materials ( catalyst to oil ratio) generally is 3 to 15, preferably 5 to 12. The reaction products flow in a settler for catalyst and oil gas separation; the separated catalyst to be regenerated is stripped by a stripping section and enters a regenerator for coke burning regeneration; and the regenerated catalyst is cooled or directly returns to the riser reactor to be recycled. The method can solve the problems encountered in the resid-blend ratio improvement and gasoline upgrade and update processes of the prior catalytic conversion.

The invention belongs to the technical field of photocatalytic application of new materials, and particularly relates to a porous covalent triazine framework hollow microsphere as well as a preparation method and application thereof, a hard template stepwise polycondensation method is adopted to prepare the porous covalent triazine framework hollow microsphere with stable structure, low collapse rate and independent hollow structure, the porous covalent triazine framework hollow microsphere has excellent photocatalytic hydrogen production performance when being applied to visible light catalytic hydrogen production, thereby solving the technical problems that the covalent triazine framework hollow microsphere is not an independent hollow structure and the hydrogen production rate is poor in the prior art.

The invention discloses a synthesis method of light stabilizer N,N-bis-(2,2,6,6-tetramethyl-4-piperidyl) isophthalamide. Isophthaloyl dichloride and 2,2,6,6-tetramethyl-4-piperidyl are taken as raw materials and react in the presence of a catalyst and a solvent, and N,N-bis-(2,2,6,6-tetramethyl-4-piperidyl) isophthalamide is prepared. According to the synthesis method of the N,N-bis-(2,2,6,6-tetramethyl-4-piperidyl) isophthalamide, the separation and purification process is simple, the reaction time is short, the product yield can be higher than 96%, the product purity is higher, the energy consumption is low, the environmental pollution is small, the cost is low, and the method is a more ideal process for industrial production.

The invention discloses a method for preparing a polymerization inhibitor (4-benzoyl-2,2,6,6-tetramethylpiperidine-1-nitroxide free radical). 4-benzoyl-2,2,6,6-tetramethylpiperidine and hydrogen peroxide are used as raw materials and reacted in the presence of a composite catalyst to obtain the 4-benzoyl-2,2,6,6-tetramethylpiperidine-1-nitroxide free radical. The method for synthesizing the 4-benzoyl-2,2,6,6-tetramethylpiperidine-1-nitroxide free radical by adopting the composite catalyst simplifies the separation and purification processes, has the advantages of short reaction time, high product yield which reaches over 91 percent of product yield, high product purity, low energy consumption, low environmental pollution and low cost, and is an ideal process for realizing industrialized production.

The invention discloses a method for synthesizing p-bromopropiophenone, which uses p-bromobenzoic acid and propionic acid as raw materials to prepare p-bromopropiophenone through reaction in the presence of a composite catalyst. The invention adopts a novel composite catalyst to synthesize p-bromopropiophenone, the separation and purification process is simple, the reaction time is short, the yield of the product reaches more than 77%, the obtained product has high purity, low energy consumption, little environmental pollution, and low cost, and is the realization of industrial production an ideal process.

The invention discloses imidazo-[1,2-c]-quinazolin-3(2H)-one fused-heterocycle compounds and a preparation method thereof, and discloses a preparation method of fused ring compounds (imidazo[1,2-c]quinazolin-3(2H)-one derivatives). The preparation method comprises the steps that 3 in a general formula is obtained by reacting at the proper temperature in the absence of a solvent or in a proper amount of the solvent under the action of amines 1 and 2 to generate a key intermediate and purifying; in addition, if R2 is -H, 3 can also be obtained by reacting 1 and DMF in the presence of benzene sulfonyl chloride and purifying, and the fused ring compounds represented by a formula are obtained by reacting 3 with 4 at the proper temperature in a proper amount of the solvent. The method has the beneficial effects that 1, the reaction path is short, namely a two-step synthetic method is adopted; 2, two heterocyclic rings are formed by adopting a one-pot method in the reaction of the second step; 3, raw materials are easily available and the operation is convenient; 4, no heavy metal ion catalysts and the like are used in the reaction and the reaction conditions are mild; 5, the reaction time is moderate, the control is easy, the post-treatment is simple, and the product purity and the yield are high; 6, the environment is not polluted and the green chemical concept is fully embodied.

The invention discloses a 8, 9-mono and/or di-substituted imidazo[1, 2-c]quinazolin-3(2H)-one fused heterocyclic compound and a preparation method thereof. The method comprises the steps of: reacting amine 1 and a compound 2 without solvent or in an appropriate solvent under an appropriate temperature to generate a key intermediate, then performing purification to obtain an intermediate 3 shown as the following general formula, or if R3=-H, reacting amine 1 and DMF under the action of benzenesulfonyl chloride and then conducting purification to obtain the intermediate 3, and then reacting the intermediate 3 with a compound 4 in an appropriate solvent under an appropriate temperature to obtain a fused ring compound 5 shown as the following general formula. The method provided by the invention has the advantages that: 1. the reaction route is short, i.e. a two-step synthesis method; 2. the fused ring compound with two heterocycles is formed in step 2 by a one-pot technique; 3. the raw materials are easily available, and the operation is convenient; 4. the reaction has no need for any heavy metal ion catalyst and the like, and the reaction conditions are mild; 5. the reaction time is moderate, the reaction is easy to control, the post-treatment is simple, and the product has high purity and yield; and 6. the method has no pollution to the environment, thus fully reflecting the concept of green chemistry.

The invention discloses a preparing method for organic intermediate diacetoacetic acid (1,4-butanediol) ester, which includes the following steps: using ketene dimer and 1,4-butanediol as raw materials, and reacting to obtain the diacetoacetic acid (1,4-butanediol) ester after the addition of a catalyst, a polymerization inhibitor and a solvent. During the synthesis of the diacetoacetic acid (1,4-butanediol) ester, the separation and purification process is simple, the reaction time is short, the product yield reaches 91% above, the product purity is higher, the energy consumption is low, environmental pollution is low, the cost is low, and the preparing method is an ideal technology for the realization of industrial production.

The invention discloses a method for synthesizing an organic synthesis intermediate compound 1-benzoylpyrene having high yield and high selectivity through the catalytic Friedel-Crafts acylation reaction of condensed aromatic pyrene and benzoic anhydride by using cheap, accessible and hydrostable aluminum phosphotungstate and supported aluminum phosphotungstate as a catalyst and using non-polar solvent 1,2-dichloroethane as solvent. The 1-benzoylpyrene is widely used in multiple fields such as medicine, pesticide, dye and the like. The method is simple in reaction, convenient to operate, short in reaction time, low in reaction temperature, low in energy consumption and satisfactory in catalyst reusability, thus conforming to the requirements for greenness and environmental protection in the world at present.

The invention discloses a 2H-imidazo[1,2-C] quinazoline-3-one compound with optical activity and a preparation method thereof. The preparation method comprises the steps of reacting to generate a key intermediate shown in the formula in the specification at appropriate temperature in the absence of solvent or in an appropriate solvent under the actions of amine 1 and a compound 2, wherein when R2 is -H, the intermediate 3 can be generated by the amine 1 and DMF under the action of benzene sulfonyl chloride, and the intermediate 3 can be obtained through separation and purification; and reacting the intermediate 3 with alpha amino-acid ester 4 or 4' at appropriate temperature in an appropriate solvent, and purifying to obtain quinazolinone compounds 5 and 6 shown in the formula in the specification. The reaction route is short, the two-step synthesis method is adopted, the raw materials are easily available, the operation is convenient, no any heavy metal ionic catalyst and the like are added during reaction, the product has high purity and high yield, no environment pollution is caused, and the green chemistry concept is fully embodied.

The invention discloses a 2,3,5-substituted imidazole[1,2-c]-thiophene[2,3-e]-7(8H)keto heterocyclic compound of which the structure is shown as a formula (I) shown in the description. The invention also discloses a preparation method of the compound and application of the compound in preparing antineoplastic drugs. The 2,3,5-substituted imidazole[1,2-c]-thiophene[2,3-e]-7(8H)keto heterocyclic compound provided by the invention adopts a two-step synthesis method, a one-pot reaction is adopted for forming two heterocyclic rings, the reaction material is easily obtained, the operation is convenient, the reaction condition is mild, the reaction time is moderate, the control is easy, the after-treatment is simple, the purity and yield of a product are high, and the compound and the synthetic method thereof have the advantages of being less in operation step, high in yield, free of reagents such as phosphorus, low in toxicity, convenient to operate and the like.