329results about How to "Suitable for industrial continuous production" patented technology

The invention provides a pressing-low-temperature continuous phase-change castor oil extraction method. According to the method, a pressed, back-dried, and crushed castor seed raw material is placed into an extraction kettle; under a condition with a pressure constantly lower than 4MPa and a temperature constantly lower than 90 DEG C, the extracting agent is compressed into a liquid; the extracting agent flows through the extraction kettle with a certain flow rate, such that castor oil is extracted; the material is delivered into a resolution kettle; heating and pressure reducing are carried out, such that the extracting agent is changed into a gas phase; instant compression is carried out, the extracting agent is changed into liquid, and flows through the extraction kettle, such that the material is extracted again. The steps are repeated several times. The extracting agent is one of propane, butane, high-purity isobutane, R134a, dimethyl ether, liquefied petroleum gas, and sulfur hexafluoride. The method provided by the invention has the advantaged of high efficiency, no solvent residue in product, and high aroma component retention rate of a supercritical extraction method. Extraction pressure and resolution pressure of the method are lower than those of supercritical extraction. The method also has the advantages of large extraction volume, large-amount batch production, low production cost, and the like of a conventional solvent extraction method.

The invention relates to a preparation method of an ion membrane electrode for pure water electrolysis, belonging to the technical field of hydrogen production by water electrolysis. The preparation method comprises the following steps: separately preparing a cathode catalyst solution and an anode catalyst solution from a cathode catalyst, an anode catalyst, a Nafion solution, isopropyl alcohol, glycerol and distilled water; separately applying the cathode catalyst solution and the anode catalyst solution on two transfer-printing templates, and drying the templates at the temperature of 80-130 DEG C in vacuum; and fixing the two dried transfer-printing templates on both sides of an ion membrane, treating at the temperature of 130-190 DEG C and the pressure of 6 MPa for 2-5 minutes, cooling to room temperature while maintaining the pressure at 6 MPa, peeling off the transfer-printing templates, placing the templates in an oven and treating in vacuum at the temperature of 70-110 DEG C for 1 hour. By using the transfer-printing templates in the preparation method, under the premise of ensuring the combination firmness degree of the ion membrane and the catalyst layer, the direct damage to the ion membrane is reduced, thereby the service life of the membrane electrode is prolonged, the energy consumption is lowered, the electrolysis efficiency is improved, the preparation time is shortened and the production cost is reduced.