Method for preparing cyclopentanol by hydration of cyclopentene

This invention is a method that cyclopentene makes cyclopentanol through hydration. It uses cyclopentene as the raw material, and in the existence of catalyst makes cyclopentanol through hydration reaction, the mole ratio of cyclopentene and water is 0.8-5.0, reaction temperature 130-180deg.C, reaction pressure 1.0-3.0MPa and reaction time 1-5 hours, the catalyst includes the main catalyst and activator, the catalyst is strong acid cation exchange resin with sulfo group anchored on the surface, and the activating solvent is trialkylamine. The dosage of catalysts are: cyclopentene/ main catalyst=(10-30)/1; activator/ main catalyst=(0.1-5)/100. the key point of this invention is that adding trialkylamine in the reaction which can improve the contact environment of cyclopentene and the activating center of catalyst surface, advance the conversion of hydration cyclopentene and maintain the selectivity at high level.

Television coaxial cable concealed in wall

The invention relates to a television coaxial cable concealed in wall with high performance and long service life. The television coaxial cable comprises a center conductor, an irradiation crosslinking foaming polyethylene insulating layer, a copper-plastic compound film or a copper foil shield layer, a copper wire braided outer conductor layer, and an irradiation crosslinking transparent polyethylene outer sheathing layer which are arranged in order from inside to outside. The insulating layer is formed by using polyethylene with high and low density combined with appropriate amount of nucleating agent to be foamed by a physical foaming machine for extruding insulating core wires which are then irradiated by an electron accelerator; the sheathing layer is formed by using a transparent PEmaterial to produce a semitransparent PE outer restrictive coating through a cable sheath extruder and then be irradiated by the electron accelerator. Due to the function of high-voltage electron-beam current ...

Concrete pipe pile static pressure construction instrument

The utility model relates to a concrete pipe pile static pressure construction instrument which comprises a hoisting pipe, the hoisting pipe is of a two-section type structure, a plurality of connecting rods are distributed at the opening attaching position of the hoisting pipe at equal intervals, rod bodies of the connecting rods are fixedly connected with the outer wall of the hoisting pipe, and detachable pull rods are arranged between openings of the hoisting pipe. The dismounting pull rod is arranged in the length direction of the opening of the hoisting pipe, a dismounting head is arranged on the dismounting pull rod, the rod end of the dismounting pull rod is connected with the pulling mechanism, and the dismounting pull rod moves upwards to enable the dismounting head to be in linkage with the connecting rod to separate the outer wall of the two-petal hoisting pipe; a guide extrusion plate is arranged at a pipe opening in the lower end of the hoisting pipe, the interior of a pipe ...

Animal model of CA16 virus infected gerbil and application thereof

The invention discloses an animal model of a CA16 virus infected gerbil and an application thereof in evaluating vaccines. The method is implemented through injecting a CA16 virus into an infected gerbil in an intraperitoneal injection mode, so that the gerbil infected with the CA16 virus is obtained, wherein the injection amount per gerbil is 1.0*10<3.0>-1.0*10<5.0> TCID50. The model disclosed by the invention greatly simulates the lesions of clinical patients infected with the CA16 virus occurring in the aspect of nervous systems such as tissues brain stems and spinal cords, but existing neonatal rat models do not have the function; and in combination with an existing EV71 virus infected gerbil model, the animal model disclosed by the invention can be used as an animal model for evaluating the protective effect of EV71/CA16 duplex vaccines.

Television coaxial cable concealed in wall

The invention relates to a television coaxial cable concealed in wall with high performance and long service life. The television coaxial cable comprises a center conductor, an irradiation crosslinking foaming polyethylene insulating layer, a copper-plastic compound film or a copper foil shield layer, a copper wire braided outer conductor layer, and an irradiation crosslinking transparent polyethylene outer sheathing layer which are arranged in order from inside to outside. The insulating layer is formed by using polyethylene with high and low density combined with appropriate amount of nucleating agent to be foamed by a physical foaming machine for extruding insulating core wires which are then irradiated by an electron accelerator; the sheathing layer is formed by using a transparent PE material to produce a semitransparent PE outer restrictive coating through a cable sheath extruder and then be irradiated by the electron accelerator. Due to the function of high-voltage electron-beam ...

Leaking coaxial cable with leakage holes distributed in unequal distances and its production process

The leaking coaxial cable consists of an inner conductor, an insulating layer, an outer conductor and an outer protective casing arranged successively from the inside to the outside. The outer conductor has transmitted signal leaking holes and features that the leaking holes are distributed in the intervals decreasing from the initial end in the output of the emitting amplifier or relay repeater station to the final end. The leaking holes are made in the outer conductor, which are formed through winding metal sheet to one axle in the set size. The unequally distributed leaking holes can not only eliminate signal echo peak but also compensate the signal attenuation from the initial end to the final end.

Stone covering device for static pressure construction of concrete pipe pile

The utility model relates to a stone covering device for concrete pipe pile static pressure construction, which comprises a hoisting pipe, a guide extrusion plate is arranged at a pipe orifice at the lower end of the hoisting pipe, stones are contained in a pipe cavity of the hoisting pipe, the guide extrusion plate is connected with a driving mechanism, and the driving mechanism drives the plate end of the guide extrusion plate to be far away from a pipe core of the hoisting pipe. The outer diameter of the plate end of the guide extrusion plate is larger than that of the hoisting pipe, when the guide extrusion plate is far away from a pipe core of the hoisting pipe, the plate end of the guide extrusion plate abuts against the inner wall of the drill hole, when construction operation on the pipe pile is carried out, the hoisting pipe is hoisted into the drill hole, the driving mechanism is started, the plate end of the guide extrusion plate is far away from the pipe core of the hoisting ...

Dual-thread seal high-strength F type coaxial cable connector

The invention relates to a dual-thread seal high-strength F type coaxial cable connector which is used for connecting a coaxial cable to an equipment interface. The coaxial cable connector comprises a connecting nut, a connector body and an elastic connecting body, wherein the connector body is provided with rear-section threads and front-section taper threads; the rear-section threads are matched and connected with a cable insulator; the front-section taper threads are used for being spirally connected with a cable sheath layer which is hermetically matched and connected with a cable sheath; the rear-section threads are used for being spirally connected with the cable insulator, so that the cable insulator is hermetically matched and connected with the connector body; a rear inner taper section and a front inner taper section are arranged between the rear-section threads and the front-section taper threads; the rear inner taper section is used for accommodating the outer conductor of the ...

High-temperature resistant fire-retardant co-axial cable

The invention relates to a high-temperature resistant fire-retardant co-axial cable. The cable comprises, from the inside to the outside, a central conductor, an irradiation crosslinking foaming fire-retardant polyethylene insulation layer, a copper foil shielding layer, a copper wire weaving outer conductor layer and an outer protection layer, wherein PE base materials, together with a proper amount of fire-retardant masterbatch and nucleating agent, undergo foaming extrusion in a physical foaming machine to make insulation core wires, the foaming fire-retardant polyethylene insulation layerprepared by the insulation core wires is irradiated by an electron accelerator, the high-voltage electron beam current generated by the electron accelerator acts on the foaming fire-retardant polyethylene insulation layer, the internal structure of the foaming fire-retardant polyethylene insulation layer is changed from the original chain-shaped macromolecular structure to the three-dimensional network ...

Rice hull adsorbent for absorbing dye and manufacturing method thereof

The invention discloses a rice husk adsorbent for dye absorption, which is prepared by the following steps: (1) 100g rice husk is prepared, the sediment impurity is removed, and the rice husk is crushed into 20 meshes, (2) 25ml-45ml sulphuric acid with a concentration of 4.5%-8.5% (w/v) is adopted as activator, and the rice husk is activated for 45-75 min at the activation temperature of 110-150 DEG C, and (3) 20ml-50ml hydrogen peroxide with a concentration of 6.0%-18% (w/v) is adopted as oxidative activator, sulphuric acid is added to adjust pH value below 6.0, and the rice husk is activatedfor 40-80min at the activation temperature of 170-200 DEG C. The rice husk adsorbent for dye absorption has the advantages of adopting the waste rice husk as basic material, relatively ideal absorption selectivity and quantity, good absorption performance with absorption rate above 50%, and low cost.

Low-loss extra-flexible coaxial cable with embossing insulated by physical foaming and wrapped by copper foil tapes

The invention relates to a low-loss extra-flexible coaxial cable with embossing insulated by physical foaming and wrapped by copper foil tapes, which successively comprises a central conductor, a physical foaming polyethylene insulating layer, a wrapped or longitudinally covered embossing outer conductor layer with copper foils, and an external protective layer from inside to outside, wherein the outer conductor layer is formed by using the following method: the insulating layer is tightly wrapped by the copper foils or copper foil tapes by a wrapped or longitudinally covered way, and then a threaded groove is rolled through spiral embossing so as to form an outer conductor. Because the outer conductor is formed by the wrapped or longitudinally covered way with the copper foils, the coverage rate of the outer conductor layer is 100 percent, and the shielding performance is extra good; because the outer conductor has an embossing structure, the cable has enough extendable space in the process ...

High-temperature resistant fire-retardant co-axial cable

The invention relates to a high-temperature resistant fire-retardant co-axial cable. The cable comprises, from the inside to the outside, a central conductor, an irradiation crosslinking foaming fire-retardant polyethylene insulation layer, a copper foil shielding layer, a copper wire weaving outer conductor layer and an outer protection layer, wherein PE base materials, together with a proper amount of fire-retardant masterbatch and nucleating agent, undergo foaming extrusion in a physical foaming machine to make insulation core wires, the foaming fire-retardant polyethylene insulation layer prepared by the insulation core wires is irradiated by an electron accelerator, the high-voltage electron beam current generated by the electron accelerator acts on the foaming fire-retardant polyethylene insulation layer, the internal structure of the foaming fire-retardant polyethylene insulation layer is changed from the original chain-shaped macromolecular structure to the three-dimensional network ...

Porcine circovirus type 3 nfo-RPA detection kit and preparation method thereof

According to the porcine circovirus type 3 nfo-RPA detection kit and the preparation method thereof, a PCV3Cap gene is amplified and connected to a pUC57 vector, a DNA probe Cap-specific-Probe is designed with the gene segment sequence as a target, a primer, the probe and nfo-RPA enzyme are mixed to establish a reaction system, the reaction system only needs to react for 9 min at the temperature of 39 DEG C, the detection specificity is high, repeatability is good, the detection time is short, the detection time is short, and the detection result is accurate. The PCV3nfo-RPA detection kit constructed by using the method can be used for realizing rapid diagnosis of PCV3 clinically.

System for automatically extracting road design center line and cross section line data

The invention provides a system for automatically extracting road design center line and cross section line data. The system comprises an importing module used for importing the road design center line data and cross section line data in CAD into the system; the attribute identification module is used for identifying the attributes of the import lines and classifying the lines with different attributes; the extraction module is used for extracting three-dimensional coordinates of a road design center line and road cross section design data; the data storage module is used for systematically storing the extracted design centerline data and cross section data; and the modeling module is used for inputting the three-dimensional coordinates of the road design center line and the road cross section design data and building a three-dimensional road model. According to the method, the road design center line in the CAD is imported into the system, the three-dimensional coordinates of the road ...

Method for preparing cyclopentanol by hydration of cyclopentene

Water-stable layer 3D paving system with high precision

The invention relates to the technical field of road paving, and discloses a high-precision water-stable layer 3D paving system which comprises an execution end, a pavement end and a pavement end, the frame is connected with a traction locomotive, the four groups of posture adjusting mechanisms are hinged to the frame and distributed in an array mode, the connecting mechanisms are fixedly connected to the bottoms of the posture adjusting mechanisms, the base plate is arranged at the bottoms of the connecting mechanisms, the collecting frame is arranged on the top of the base plate and connected with the connecting mechanisms, and the connecting mechanisms are connected with collecting frame posture adjusting mechanisms. And the bottom of the base plate is fixedly connected with an ironing plate with a rectangular structure. According to the invention, the attitude of the screed plate is adjusted accurately and quickly, accurate paving operation is realized, and the situations that the pavement ...

Rice hull adsorbent for absorbing dye and manufacturing method thereof

The invention discloses a rice husk adsorbent for dye absorption. The invention is characterized in that (1) 100g rise husk is prepared, the sediment impurity is removed, and the rise husk is crushed into 20mesh, (2) 25ml-45ml sulfate with concentration 4.5%-8.5%(w/v) is adopted as activator, and the rise husk is activated for 45-75min at the activation temperature of 110-150 DEG C, and (3) 20ml-50ml hydrogen peroxide with concentration 6.0%-18%(w/v) is adopted as oxidative activator, sulfate is added to adjust pH value below 6.0, and the rise husk is activated for 40-80min at the activation temperature of 170-200 DEG C. The rice husk adsorbent for dye absorption has the advantages of adopting the waste rice husk as basic material, relatively ideal absorption selectivity and quantity, good absorption performance with absorption rate above 50%, and low cost.

Prefabricated support pad stone assembling equipment and prefabricated support pad stone

The utility model relates to prefabricated support cushion stone assembling equipment which comprises an assembling box body used for loading prefabricated cushion stone, an opening is formed in the lower portion of the assembling box body, the lower end of the prefabricated cushion stone stretches out of the opening of the assembling box body and stretches into a cover beam pouring box body, the assembling box body is adjustably arranged on an assembling machine frame, and the assembling machine frame is arranged on the assembling machine frame. The height, located on the assembling machine frame, of the assembling box body and the flatness of an opening in the lower end of the assembling box body are adjustable, the support padstone is produced in a prefabricated mode, reserved steel bars bundled together with a bent cap steel bar cage are reserved on the prefabricated padstone, the prefabricated support padstone is placed in the assembling box body, the reserved steel bars are exposed ...

Dual-thread seal high-strength F type coaxial cable connector

The invention relates to a dual-thread seal high-strength F type coaxial cable connector which is used for connecting a coaxial cable to an equipment interface. The coaxial cable connector comprises a connecting nut, a connector body and an elastic connecting body, wherein the connector body is provided with rear-section threads and front-section taper threads; the rear-section threads are matched and connected with a cable insulator; the front-section taper threads are used for being spirally connected with a cable sheath layer which is hermetically matched and connected with a cable sheath;the rear-section threads are used for being spirally connected with the cable insulator, so that the cable insulator is hermetically matched and connected with the connector body; a rear inner taper section and a front inner taper section are arranged between the rear-section threads and the front-section taper threads; the rear inner taper section is used for accommodating the outer conductor ofthe ...