10 results about "N-propyl acetate" patented technology

The invention provides a high-temperature-resistant protective film and a preparation method thereof, and relates to the technical field of protective film materials. The high-temperature-resistant protective film comprises a dull polish coating of 3-4 microns, a base material layer of 8-10 microns, a pressure-sensitive adhesive layer of 4-5 microns and a release layer of 50 microns. The frosted coating is prepared from the following raw materials in parts by mass: 10 to 20 parts of polyurethane resin, 10 to 20 parts of acrylic resin, 10 to 20 parts of polyamide resin, 10 to 20 parts of n-propyl acetate, 25 to 35 parts of modified or unmodified titanium dioxide, 5 to 10 parts of carbon black and 0.5 to 5 parts of matting powder. The protective film provided by the invention has high-temperature resistance, does not have the conditions of shrinkage, rime fog precipitation and the like in a high-temperature process environment, does not have the problems of adhesive residue and difficulty in stripping after being torn off, and is suitable for various high-temperature-resistant protection processes.

The invention belongs to the field of esterification reaction kettles, and particularly relates to an esterification reaction kettle for producing n-propyl acetate, which comprises a shell, the lower end of the shell is fixedly connected with a support column, the shell is internally provided with a discharge port, the outer side of the discharge port is provided with a valve body, and the shell is internally provided with a feed port. According to the esterification reaction kettle for production of n-propyl acetate, by designing components such as a motor, a rotating rod, a first bevel gear, a second bevel gear, a rotating column and an annular sleeve, the motor is started to drive the components such as the rotating column, a sliding plate and a stirring frame to rotate, and the sliding plate rotates and moves in a threaded mode through a threaded rod; the sliding plate moves downwards to drive the stirring frame to move downwards, and the stirring frame rotates while moving downwards to stir the materials, so that the materials in the device are uniformly stirred.

The invention discloses n-propyl acetate head ester extraction and separation equipment, and relates to the technical field of extraction and separation equipment, the n-propyl acetate head ester extraction and separation equipment comprises a connecting bottom plate, an extraction tank is arranged at the top of the connecting bottom plate close to one side edge, and a drainage assembly is arranged at the top of the connecting bottom plate close to the other side edge. According to the n-propyl acetate head ester extraction and separation equipment, dehydrated n-propyl acetate head ester enters the absorption column, and organic acid molecules in the n-propyl acetate head ester are intercepted by activated aluminum oxide in a chemical adsorption manner, so that the acid value of ester in the n-propyl acetate head ester entering the output pipe reaches a required value; the content of organic acid in the n-propyl acetate head ester reaches a required value, so that the emulsification phenomenon is inhibited from the fundamental cause of emulsification, and the occurrence of the emulsification phenomenon of the n-propyl acetate head ester is prevented.

The utility model discloses energy-saving n-propyl acetate production equipment which comprises a main body, a stirring cavity is formed in the main body, a heating cavity is formed in the outer side of the stirring cavity, an electric heating plate is arranged in the heating cavity, and the energy-saving n-propyl acetate production equipment further comprises a first transmission cavity which is formed in the upper end of the interior of the main body; first rotating rods are rotationally arranged on the two sides of the upper end in the first transmission cavity, second transmission cavities are formed in the two sides of the lower end in the main body, one ends of the first rotating rods penetrate through the stirring cavity and extend into the second transmission cavities, and the first rotating rods are rotationally connected with the second transmission cavities. When the energy-saving n-propyl acetate production equipment is used for stirring and mixing, liquid can be circulated and exchanged in a wider area, the layering phenomenon in the liquid can be broken through multidirectional flow, and acetic acid and n-propyl alcohol molecules are ensured to be fully contacted and mixed in a shorter time, so that the mixing uniformity is improved.

The invention relates to a device and a method for recovering n-propyl acetate through azeotropic distillation. According to the method, the waste liquid obtained through activated carbon adsorption and desorption in the printing industry is subjected to azeotropic distillation to remove light components by adding an entrainer, and the high-purity n-propyl acetate solvent is recovered through distillation recovery. Waste liquid and cyclohexane enter a first rectification device in a continuous feeding mode to be subjected to azeotropic rectification, an azeotropic phenomenon exists between cyclohexane and ethyl alcohol, n-propyl alcohol, isopropyl alcohol and ethyl acetate, and azeotropic light components containing ethyl alcohol, n-propyl alcohol, isopropyl alcohol and ethyl acetate are extracted from the top of the first rectification device; and condensing the azeotropic component by a first condenser, partially refluxing and extracting to obtain a heavy component mainly containing n-propyl acetate, rectifying in second rectification equipment, extracting an n-propyl acetate solvent from the tower top, condensing by a second condenser, partially refluxing and extracting to obtain the n-propyl acetate. Heavy components containing propylene glycol monomethyl ether and n-butyl acetate are obtained in the second reboiler, and a solution in the second reboiler can be subjected to secondary rectification.

The application discloses a low-VOC environment-friendly multi-ester-based composite ink diluent and a preparation method thereof, and relates to the technical field of printing chemical auxiliaries, which is prepared from the following raw materials in parts by weight: 19-23 parts of ethyl acetate, 14-18 parts of methyl acetate, 20-26 parts of dimethyl carbonate, 12-18 parts of n-propyl acetate, 1-3 parts of propylene carbonate, 2-4 parts of divalent acid ester, 5-7 parts of methylal, 2-4 parts of propylene glycol methyl ether acetate, 3-5 parts of butyl acetate, 5-7 parts of isopropyl alcohol, 0.5-0.7 parts of an organic defoaming agent and 0.2-0.6 parts of a titanate coupling agent. The low-VOC environment-friendly multi-ester-based composite ink diluent and the preparation method thereof abandon toxic and harmful solvents such as benzene and halogenated hydrocarbons, the VOC content is lower than the national standard limit value of GB 38507-2020, the volatility is low, and the harm to the environment and the health of operating personnel is reduced.

The present application relates to the technical field of phase change material, and provides a phase change cold storage material, a preparation method and application thereof, the phase change cold storage material comprises two or more components; the components comprise ester substances; the ester substances are selected from one or a combination of two or more of butyl valerate, ethyl butyrate and n-propyl acetate. By screening specific ester substances, a mixed medium with a eutectic temperature less than or equal to -90 DEG C can be obtained, so that the energy storage requirement in the temperature zone below -90 DEG C can be realized. The selected substances have the characteristics of high safety and excellent thermal performance, and can be used in the fields of liquefied natural gas storage, liquefied natural gas transportation, medicine storage, medicine transportation or power load management. Meanwhile, the phase change cold storage material preparation method is simple, low in cost and has a high market application prospect.

The invention discloses novel gravure pearlescent ink. The novel gravure pearlescent ink is prepared from a base material resin system, an environment-friendly solvent system, a pearlescent pigment and an auxiliary agent, wherein the base material resin system is formed by mixing acrylic acid modified polyurethane and nitrocellulose; the environment-friendly solvent system is formed by mixing n-propyl acetate, isophorone and gamma-butyrolactone; the auxiliary agent is composed of a leveling agent, a defoaming agent and a light stabilizer. The invention further discloses a preparation method of the novel gravure pearlescent ink. The preparation method comprises the specific steps of a pre-dispersion stage, a resin dissolution stage, a fine grinding stage and a post-adjustment stage. The novel gravure pearlescent ink provided by the invention not only has excellent mechanical properties, but also has good optical properties. The novel gravure pearlescent ink provided by the invention has excellent antibacterial performance. The preparation method of the novel gravure pearlescent ink provided by the invention also has the advantages of simple process, mild conditions, good repeatability, facilitation of industrial popularization and the like.

The utility model relates to the technical field of condensing devices, in particular to a condensing device for producing n-propyl acetate, which comprises a steam pipe, a coiled pipe mounted at the air outlet end of the steam pipe, an exhaust pipe mounted at the air outlet end of the coiled pipe, a water inlet pipe fixedly mounted on the exhaust pipe, and a spiral heat exchange pipe fixedly mounted at the water outlet end of the water inlet pipe. The spiral heat exchange pipe is located in the coiled pipe, a water outlet pipe is fixedly installed at the water outlet end of the spiral heat exchange pipe, a drainage assembly is arranged at the bottom of the coiled pipe and comprises a plurality of drainage pipes fixedly installed on a pipe body at the bottom of the coiled pipe, and a drainage cylinder is fixedly installed at the bottom of each drainage pipe. A conical barrel is fixedly installed on the cavity wall of the water outlet cavity, a plugging ball and a floating ball are slidably connected into the water outlet cavity and the floating cavity respectively, and the plugging ball and the floating ball are connected through a guide rod. The n-propyl acetate steam condensation device is beneficial to steam condensation operation in the n-propyl acetate production process and convenient to use.

The application discloses a kind of gravure pearlescent inks, the gravure pearlescent ink is composed of substrate resin system, environmentally friendly solvent system, pearlescent pigment and adjuvant;Wherein, the substrate resin system is by acrylic modified polyurethane and nitrocellulose mixed into;The environmentally friendly solvent system is by n-propyl acetate, isophorone and gamma-butyrolactone mixed into;The adjuvant is by leveling agent, defoaming agent and light stabilizer composition.The application also discloses the preparation method of the gravure pearlescent ink, and the specific steps include pre-dispersion stage, resin dissolving stage, fine grinding stage and post-adjustment stage.The gravure pearlescent ink provided by the application not only has excellent mechanical properties but also has good optical performance.The gravure pearlescent ink provided by the application has excellent antibacterial performance.The preparation method of the gravure pearlescent ink provided by the application also has the advantages of simple process, mild conditions, good repeatability and being conducive to industrialization promotion.