34results about How to "Easy to control industrially" patented technology

The invention relates to a method for extracting grease from oil seeds, in particular to a method for extracting and recycling olive pomace oil from olive pomace. The method is characterized by comprising the following steps of: (1) drying the olive pomace until the water content is less than 13%, and crushing to 40-80 meshes by a crusher; (2) putting the dried and crushed olive pomace into an extraction kettle, vacuumizing until the pressure is less than 1*10<4>pa, and discharging air in the extraction kettle; (3) injecting a tetrafluoroethane solution into the extraction kettle by a plunger pump until the level of the solution submerges raw materials of the olive pomace by using a sight glass for observation; (4) starting stirring and extracting, wherein the extraction pressure is 1.0-1.2Mpa, the temperature is 40-50 DEG C, and the extraction time is 45min; (5) decompressing, raising temperature, evaporating and separating in a separation kettle, wherein the extraction pressure is 0.1-0.5Mpa, and the temperature is 40-50 DEG C; and (6) after subcritical extraction, centrifuging to separate crude oil by a high-speed centrifuge, and filtering to obtain the final olive pomace oil.

The invention relates to the fields of industrial cooling water treating agent and water circular treatment, which provides a polymer containing a double-tracing group and a method for preparing the same. In the polymer, mixed water solution of an unsaturated fluorescence monomer containing trisulfonic acid, maleic anhydride, acrylic acid or itaconic acid, acrylamide or substituted acrylamide, anunsaturated monomer containing sulfonic acid and a non-ion monomer is subjected to copolymerization at a temperature of between 70 and 90 DEG C for 5 to 7 hours so as to obtain a single tracing copolymer with the side chain containing a trisulfonic acid tracing group; and the single tracing copolymer is added with 9-hydroxyxanthene and stirred under the conditions of avoiding light and room temperature for 40 and 60 hours, and is added with methanol for deposition, filtering and refinement, and the polymer containing the double-tracing group is obtained. Because the polymer contains two different structures of fluorescence groups, if the fluorescent background interference exists in the system, the concentration of the polymer can also be detected by another fluorescence group, and the concentration of the polymer in water can be quickly and accurately measured by the fluorescence or spectrophotometry, thereby improving the application range of the polymer.

The invention discloses a production method for a cyclohexane-1,2-diformate plasticizer. The production method comprises the following steps: 1, compound catalyst preparation: evenly configuring disulfate with metal powder with the particle diameter of 40 to 100 meshes according to a mass ratio of (2 to 5) to 1 to obtain a compound catalyst; 2, by utilizing cyclohexane-1,2-dioctyl phthalate and alcohol as materials according to a molar ratio of the cyclohexane-1,2-dioctyl phthalate to the alcohol of 1 to (2 to 3), adding the compound catalyst of 0.1% to 1% of the total mass of the materials into a reaction kettle, stirring under normal pressure, reacting for 3 to 5 hours under 140 to 170 DEG C, cooling and separating to obtain the cyclohexane-1,2-diformate plasticizer. The catalyst of the production method has the advantages of environmental friendliness, economy, easiness in preparation, not waste acid generation, longer service life, flexible mass composition matching, moderate catalyzing activity, pure product, easiness in separation and low equipment requirement. The cyclohexane-1,2-diformate plasticizer synthesizing method disclosed by the invention has the advantages of simpleness, no other byproduct generation, no complex product separation device, convenience in operation and easiness in industrial control; furthermore, energy consumption is greatly is reduced, and investment cost is reduced.

The invention relates to a method of extracting bay leaf oil from bay leaves with subcritical n-butane fluid. The method includes smashing, adding into a tank, dipping with an n-butane solvent, extracting, distilling, and the like. Extraction temperature and pressure can be accurately controlled by utilization of a subcritical extraction device. The method is high in extraction efficiency, low in device manufacturing cost, high in raw material treating amount, simple in process, low in production cost and free of solvent residue. A whole process of the method is performed at low temperature under an oxygen-free state. Extraction and separation are performed at the same time. The extraction speed is high. Recovery and reutilization of the solvent can be achieved.

The invention provides a novel intermediate for preparing trimethoprim and a novel method for preparing the trimethoprim by the intermediate. The method of 'dealing with different problems in the same way' is adopted. The operation is convenient, the yield is high, the cost is low and the industrial control is easy to realize.