Evaluation device of cyclohexenol catalyst prepared by using benzene hydrogenation

The invention discloses an evaluation device of a cyclohexenol catalyst prepared by using benzene hydrogenation, comprising a high pressure reaction kettle, wherein a feeding tank is sequentially connected with a feeding buffer tank and the high pressure reaction kettle via pipelines, the high pressure reaction kettle is sequentially connected with a cooler, a gas-liquid separating tank and a product collecting bottle via pipelines, the high pressure reaction kettle is internally provided with a sampling tube which is connected with a sampling tank arranged outside the high pressure reaction kettle, a hydrogen input tube is connected with the upper part of the feeding buffer tank and the sampling tube respectively through a tee; the device provided by the invention can implement multiple reaction evaluations on the preparation of a cyclohexenol catalyst sample prepared by using benzene hydrogenation to obtain the activity and service life parameters of the catalyst in a quasi-continuous ...

Preparation of cellulose solution

The invention discloses a method for preparing a high-concentration cellulose non-derivatization solution, wherein, the method has few steps in the preparation process, and is simple, easy to operate, green, environment-friendly and quick. The method is realized by the following technical proposal: firstly, 2 to 20 percent of cellulose (w/v), 4 to 10 percent of lithium chloride (w/v) and dimethylacetamide are subjected to ultrasonic treatment for 5 to 20 minutes with a frequency of between 20 and 25KHz and a power of between 400 and 800W, are evenly stirred at room temperature, then are frozen for 3 to 5 hours at a temperature of between 6 and 20 DEG C below zero, and a cellulose solution which can steadily exist at room temperature is obtained. The method is particularly suitable for natural cellulose with a molecular weight lower than 5x10<4>. In the method, the cellulose does not form new derivatives after the ultrasonic treatment and refrigerating treatment. The method provides abetter ...

Preparation method of ruthenium-containing catalyst for producing cyclohexene by partial dehydrogenation of benzene

The invention discloses a preparation method of a ruthenium-containing catalyst for producing cyclohexene by partial dehydrogenation of benzene, which is characterized by comprising the following steps: utilizing hydrogen to perform primary reduction on a precursor of the ruthenium-containing catalyst, wherein the reduction temperature is 60-100 DEG C, and the reduction time is 1-10 hours; washing an intermediate of the ruthenium-containing catalyst obtained after reduction, and then storing in alkaline water with the pH of 11.0-13.0; utilizing the hydrogen to perform secondary reduction on the intermediate of the ruthenium-containing catalyst before using the catalyst, wherein the reduction temperature is 100-200 DEG C, and the reduction time is 1-100 hours; washing a product after the reduction, and then using the product as the ruthenium-containing catalyst for producing the cyclohexene by hydrogenation of the benzene. The preparation method has the advantages of considering the need ...

Benzene selective hydrogenation device

The invention discloses a benzene selective hydrogenation device, which comprises a liquid phase mixer (1), a gas phase mixer (2), a tubular reaction vessel (3), a separation tank (4) and a membrane filter (5), wherein a pipe process material inlet of the tubular reaction vessel is communicated with a material outlet of the gas phase mixer through a first connecting pipeline, a clamp sleeve is arranged outside the tubular reaction vessel, the upper part of the separation tank is communicated with the pipe process material outlet of the tubular reaction vessel through a second connecting pipeline, the top of the separation tank is communicated with a hydrogen exhaust pipe, in addition, the bottom of the separation tank is communicated with a circulation liquid inlet of the liquid phase mixer through a circulation pipeline, a material inlet at the bottom of the membrane filter is communicated with an oil phase material outlet arranged on the separation tank through a reaction material outlet ...

Method for separating low-carbon olefin mixed gas

The invention discloses a separation method of low-carbon olefin mixed gas. At least one of alcohols, ethers and ketones that contain one to four carbon atoms in a molecule is added into the low-carbon olefin mixed gas as the absorbent, which, at a certain temperature and under a certain pressure, effectively absorbs C3-C5 components in the low-carbon olefin mixed gas; then absorption, desorption and rectification are used to separate the C3-C5 components in the low-carbon olefin mixed gas. The method of the invention, applicable to middle and small-scale low-carbon olefin preparation by methanol transformation, has exceedingly strong economic property and the advantages of reliable performance, low equipment investment and low energy consumption.

S-1 full-silicon molecular sieve and preparation method thereof as well as application of S-1 full-silicon molecular sieve in caprolactam preparation

The invention discloses an S-1 full-silicon molecular sieve and a preparation method thereof as well as application of the S-1 full-silicon molecular sieve in caprolactam preparation. The S-1 full-silicon molecular sieve is prepared by the method comprising the following steps: (1) synthesizing a tetrapropylammonium hydroxide template agent; and (2) synthesizing a molecular sieve: carrying out a reaction on tetrapropylammonium hydroxide liquor and tetraethoxysilane and ethanol, filtering, washing with deionized water, drying reaction liquid, roasting, so as to obtain molecular sieve raw powder; adding silica sol, polyethylene glycol 2000, and stronger ammonia water, sesbania powder and activated carbon powder in the molecular sieve raw powder, kneading in a kneader, then carrying out extrusion; roasting, immersing the roasted product in a NH3-NH3NO3 mixing solution and a hydrofluoric acid solution respectively, washing with deionized water, drying, roasting again so as to obtain the S-1 ...

Rotary reaction device for hydro-thermal synthesis

The invention discloses a rotary reaction device for a hydro-thermal synthesis molecular sieve, which comprises a control system arranged on a seat frame, an electric heating blower and a side horizontal reaction kettle arranged in the electric heating blower, wherein a support rotating mechanism is arranged under the side horizontal reaction kettle and comprises a drive mechanism and two rotating shafts parallel to the center line of the side horizontal reaction kettle, the two rotating shafts are positioned in the electric heating blower, two pairs of transmission idler wheels are arranged on the two rotating shafts, the side horizontal reaction kettle is supported on the two pairs of transmission idler wheels, and the two pairs of transmission idler wheels drive the side horizontal reaction kettle to rotate. The volume of the reaction kettle can be made into the scale of the library pilot scale test, the single-kettle output can reach the kilogram level, and the rotary reaction device ...

Tea leaf theanine health-care food composition and preparation method thereof

The invention discloses a tea leaf theanine health-care food composite. The tea leaf theanine health-care food composite comprises the following raw materials in part by weight: 50-100 parts of tea leaf theanine, 50-100 parts of gamma-aminobutyric acids, 300-380 parts of DHA (dihexyl adipate) algae oil, 30-70 parts of taurine and 1.0-2.5 parts of vitamin. The invention also discloses a preparation method of the tea leaf theanine health-care food composite. The tea leaf theanine health-care food composite is reasonable in formula; by the tea leaf theanine health-care food composition, effects of effectively alleviating physical and psychological stress, relaxing mood, improving memory and reducing blood pressure can be achieved; and the fatigue of a user can be relieved as soon as possible after the user takes a break after working. An animal function test shows that the tea leaf theanine health-care food composition has a function of improving memory and does not have any toxic or side ...

Separating device and method for preparing lower-carbon olefin gas product by methanol and dimethyl ether transformation

The invention relates to a separating device and method for light olefins gas product prepared by the transformation of methanol and dimethyl ether, which comprises an absorption and analysis part and a C3-C5 separation part; wherein, a balance tower is arranged between an absorption tower and a primary analysis tower for stabilizing the running and operation of the system, improving the separation efficiency of the C2 and lighter components, and enlarging the operating flexibility of the system; the separation process is adopted with absorption, analysis and rectifying method, using gasolineas absorbent, and separating the light olefins product gas prepared by the transformation of methanol and dimethyl ether in the condition of lower pressure and needless cold energy. The separating device and method for light olefins gas product has the advantages of being suitable for the separation of C3-C5 components in MDTO gas, enabling the separation of the product gas in various working conditions ...

Benzene selective hydrogenation device

The invention discloses a benzene selective hydrogenation device, which comprises a liquid phase mixer (1), a gas phase mixer (2), a tubular reaction vessel (3), a separation tank (4) and a membrane filter (5), wherein a pipe process material inlet of the tubular reaction vessel is communicated with a material outlet of the gas phase mixer through a first connecting pipeline, a clamp sleeve is arranged outside the tubular reaction vessel, the upper part of the separation tank is communicated with the pipe process material outlet of the tubular reaction vessel through a second connecting pipeline, the top of the separation tank is communicated with a hydrogen exhaust pipe, in addition, the bottom of the separation tank is communicated with a circulation liquid inlet of the liquid phase mixer through a circulation pipeline, a material inlet at the bottom of the membrane filter is communicated with an oil phase material outlet arranged on the separation tank through a reaction material outlet ...

Separating device and method for preparing lower-carbon olefin gas product by methanol and dimethyl ether transformation

The invention relates to a separating device and method for light olefins gas product prepared by the transformation of methanol and dimethyl ether, which comprises an absorption and analysis part and a C3-C5 separation part; wherein, a balance tower is arranged between an absorption tower and a primary analysis tower for stabilizing the running and operation of the system, improving the separation efficiency of the C2 and lighter components, and enlarging the operating flexibility of the system; the separation process is adopted with absorption, analysis and rectifying method, using gasoline as absorbent, and separating the light olefins product gas prepared by the transformation of methanol and dimethyl ether in the condition of lower pressure and needless cold energy. The separating device and method for light olefins gas product has the advantages of being suitable for the separation of C3-C5 components in MDTO gas, enabling the separation of the product gas in various working conditions ...

Micro-inverse device capable of switching evaluation of catalyst and carbon determination of catalyst

The invention discloses a micro-inverse capable of switching evaluation of a catalyst and carbon determination of the catalyst. The device comprises a reaction furnace, a liquid separation tank, a chromatograph hydrogen flame ionization detector (FID) and a carbon monoxide conversion furnace. The device provided by the invention can realize on-line analysis of the evaluation of the catalyst and finish observation of the activity and inactivation of the catalyst; the coke content of catalyst can be obtained by comparing the catalyst after carbon burning with a standard curve of calibration carbon black; and switching between the evaluation of the catalyst and the carbon determination of the catalyst under control of a simple electric six-way valve. An experimental process is simple in operation and can control conditions such as a reaction temperature, a pressure and the quantity of flow accurately.

Inorganic semiconductor cadmium selenide nanotube structure and preparation method thereof

The invention discloses a preparation method of an inorganic semiconductor cadmium selenide nanotube structure. The method comprises the following steps of: (1) placing perylene powder, cadmium selenide powder and a silicon wafer in a quartz tube of a tubular furnace sequentially according to the flowing direction of an air flow, wherein the silicon wafer is fixed on the upper side of the inner wall with a high-temperature resistant adhesive, and the air flow is inert gas to be introduced into the quartz tube; and (2) introducing the inert gas into the quartz tube, keeping flowing of the inert gas when the quartz tube is completely in the atmosphere of the inert gas, controlling the tubular furnace to be heated to a temperature required for preparing the nanotube structure according to a preset velocity, keeping the constant temperature in a preset time to ensure that the reaction is performed sufficiently, and naturally cooling and reducing the temperature to obtain the inorganic semiconductor ...

Preparation of cellulose solution

The invention discloses a method for preparing a high-concentration cellulose non-derivatization solution, wherein, the method has few steps in the preparation process, and is simple, easy to operate, green, environment-friendly and quick. The method is realized by the following technical proposal: firstly, 2 to 20 percent of cellulose (w/v), 4 to 10 percent of lithium chloride (w/v) and dimethyl acetamide are subjected to ultrasonic treatment for 5 to 20 minutes with a frequency of between 20 and 25KHz and a power of between 400 and 800W, are evenly stirred at room temperature, then are frozen for 3 to 5 hours at a temperature of between 6 and 20 DEG C below zero, and a cellulose solution which can steadily exist at room temperature is obtained. The method is particularly suitable for natural cellulose with a molecular weight lower than 5x10<4>. In the method, the cellulose does not form new derivatives after the ultrasonic treatment and refrigerating treatment. The method provides a better ...

Fluidized bed catalyst and preparation method thereof

The invention discloses a fluidized bed catalyst and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing a bonder containing aluminium and silicon, a molecular sieve and a base material in desalted water into slurry; adjusting the pH value to 2.5 to 7.0 to make the slurry gelatinous; spraying and granulating to obtain a solid microsphere; roasting the solid microsphere, and stirring to immerse the roasted solid microsphere into an acid water solution in a suspension mode for 0.1 to 100 hours; and separating the immersed solid microsphere from the acid water solution, and carrying out secondary roasting to prepare the fluidized bed catalyst. The fluidized bed catalyst is high in abrasion-resistant strength and difficult to crush; and activity and selectivity after granulation are quite approximate to those of the corresponding molecular sieve.

Method for comprehensively utilizing heat energy of high-temperature water of reduction furnace and/or hydrogenation furnace

The invention discloses a method for comprehensively utilizing heat energy of high-temperature water of a reduction furnace and/or a hydrogenation furnace, comprising the following steps of: respectively introducing high-temperature water backwater from the reduction furnace and/or the hydrogenation furnace to a #1 high-temperature water heat exchanger, a #2 high-temperature water heat exchanger and a high-temperature water cooler so that the high-temperature water backwater in the #1 high-temperature water heat exchanger and hot water backwater from a heat exchanger produced by polysilicon perform heat exchange; carrying out heat exchange on the high-temperature water backwater in the #2 high-temperature water heat exchanger and hot water backwater from a frozen water unit; carrying out heat exchange on the high-temperature water backwater and circulation cooling water supply on the high-temperature water cooler for adjusting the temperature of the high-temperature water backwater; and ...

Method for separating low-carbon olefin mixed gas

The invention discloses a separation method of low-carbon olefin mixed gas. At least one of alcohols, ethers and ketones that contain one to four carbon atoms in a molecule is added into the low-carbon olefin mixed gas as the absorbent, which, at a certain temperature and under a certain pressure, effectively absorbs C3-C5 components in the low-carbon olefin mixed gas; then absorption, desorptionand rectification are used to separate the C3-C5 components in the low-carbon olefin mixed gas. The method of the invention, applicable to middle and small-scale low-carbon olefin preparation by methanol transformation, has exceedingly strong economic property and the advantages of reliable performance, low equipment investment and low energy consumption.

Method for synthesizing silicon aluminum orthophosphate molecular sieve using white bole

Preparation method of inorganic semiconductor cadmium selenide nanotube structure

The invention discloses a preparation method of an inorganic semiconductor cadmium selenide nanotube structure. The method comprises the following steps of: (1) placing perylene powder, cadmium selenide powder and a silicon wafer in a quartz tube of a tubular furnace sequentially according to the flowing direction of an air flow, wherein the silicon wafer is fixed on the upper side of the inner wall with a high-temperature resistant adhesive, and the air flow is inert gas to be introduced into the quartz tube; and (2) introducing the inert gas into the quartz tube, keeping flowing of the inert gas when the quartz tube is completely in the atmosphere of the inert gas, controlling the tubular furnace to be heated to a temperature required for preparing the nanotube structure according to a preset velocity, keeping the constant temperature in a preset time to ensure that the reaction is performed sufficiently, and naturally cooling and reducing the temperature to obtain the inorganic semiconductor ...