5 results about "N-propyl acetate" patented technology

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 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 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.