84results about How to "High impurity removal rate" patented technology

The preparation process of pectin by using premna microphylla leaf as raw material includes the following steps: treating raw material, acid extraction, filtration, decolouring and removing smell, spraying-drying to obtain pectin or after decolouring and removing smell, alcohol precipilation, washing and spraying-drying so as to obtain the pectin, in which the extract obtained after filtration is undergone the processes of coacervation, ion exchange and ultrafiltration and concentration to make decolorization, smell removed and desugarization, i.e. placing the polycoagulant whose concentration is 1% into the filtered extract, adding alkali to control pH value, precipitating to remove impurity and decolouring at twice, making the extract pass through the ion exchange resin column to make treatment.

The invention discloses a production technology of food-grade phosphoric acid with hydrochloric acid method. According to the invention, hydrochloric acid acidolysis process is used as a base, heavy metal impurities are removed by prepurification and subsequent purification, and simultaneously tributyl phosphate with simple components and stable property is used as an extractant to complete extraction, the extraction effect is good, and back extraction process of dilute hydrochloric acid is combined, the utilization rate of the extractant is high. The whole extraction and back extraction are completed at normal temperature, thus the technology is especially suitable for preparing food-grade phosphoric acid in industrial production. The liquid-liquid extraction technology has strong controllability, and high extraction rate and high impurity removal rate. The content of H3PO4 in a finished product of phosphoric acid reaches more than 75 wt%. The finished product of phosphoric acid has good quality and can be used in food industry without purification, and is suitable for lean phosphate rocks or rich phosphate rocks.

The invention discloses a material screening and impurity removing device comprising a support. A bearing seat is fixedly connected to the rear side of the support. A motor is fixedly connected to theupper portion of the bearing seat. A coupling is fixedly connected to the output end of the motor. A left rotary shaft is fixedly connected to the front end of the coupling and is rotationally connected with the left side of the support. A left rotary wheel is fixedly connected to the outer side of the left rotary shaft. A right rotary shaft is rotationally connected to the right side of the support. A right rotary wheel is fixedly connected to the outer side of the right rotary shaft. The left rotary wheel and the right rotary wheel is sleeved with a conveying belt. The outer side of the conveying belt is provided with a plurality of air holes. A plurality of conveying lugs are fixedly connected to the inner side of the conveying belt. The front sides of the left rotary wheel and the right rotary wheel are sleeved with front baffles. Compared with the prior art, the material screening and impurity removing device has the beneficial effects that the structure is simple, use is convenient, light impurities in materials can be screened out and removed during use, then pure materials are obtained, and the impurity removing rate is high.

The invention discloses a weeding and tilling depth adjusting method, device and system, computer equipment and a storage medium, and the method comprises the steps: obtaining a rice seedling crop rowimage according to a time interval calculated according to the driving speed of an intertillage weeding machine; completing semantic segmentation of rice seedling pixels and inter-row weed pixels onthe rice seedling crop row image, and defining rice seedling crop rows according to the rice seedling pixels; grading the weed density according to the pixel values of the weeds in the rice seedling crop rows, and recording the position information of the weeds on the rice seedling crop row images; and controlling a tilling depth adjusting mechanism of the intertillage weeding machine to adjust the weeding tilling depth of the weeding part corresponding to the weed density grade according to the weed density grade and the position information. According to the invention, real-time identification of the density and position of weeds between rice seedling rows can be realized, corresponding weeding tilling depth adjustment is further realized, the impurity removal rate of the intertillage weeding machine is improved, and a foundation is laid for research and development design of the intelligent intertillage weeding machine between rice seedling rows.

According to the invention, trace olefins and dienes are removed from aromatic plant feedstocks by contacting the catalyst using conditions outside the ordinary range used for this application today.

The preparation process of pectin by using premna microphylla leaf as raw material includes the following steps: treating raw material, acid extraction, filtration, decolouring and removing smell, spraying-drying to obtain pectin or after decolouring and removing smell, alcohol precipilation, washing and spraying-drying so as to obtain the pectin, in which the extract obtained after filtration is undergone the processes of coacervation, ion exchange and ultrafiltration and concentration to make decolorization, smell removed and desugarization, i.e. placing the polycoagulant whose concentration is 1% into the filtered extract, adding alkali to control pH value, precipitating to remove impurity and decolouring at twice, making the extract pass through the ion exchange resin column to make treatment.

The invention discloses a wrapping isolation type lubricating oil regeneration process, and belongs to the field of lubricating oil. According to the wrapping isolation type lubricating oil regeneration process, a ball net plate is arranged, downward pushing is conducted from top to bottom, so that lubricating oil and impurities are forced to be layered, and compared with the prior art, only standing flocculation impurity removal is conducted, so that the regeneration efficiency of the lubricating oil is remarkably improved; after a ball aligning screen plate touches the bottom, along with continuous pushing, a thermal collapse floating ball gradually gets close to the middle of the ball aligning screen plate and is tightly attached to the upper portion of the ball aligning screen plate, in cooperation with heating operation, the thermal collapse floating ball gradually collapses and wraps the ball aligning screen plate, impurities and lubricating oil are effectively separated, and scattering of impurities of layering, caused when the lubricating oil is separated and vibrates, is effectively avoided so the content of the impurities in the regenerated lubricating oil is effectively reduced, the quality of the regenerated lubricating oil is improved, the impurity extraction rate is higher, meanwhile, when the collapsed thermal collapse floating ball is solidified, the impurities at the boundary of a part of the layering can be fixed, and the impurity removal rate is further improved.

The invention relates to a fluidized bed reactor and a hydrogenation method thereof. The fluidized bed reactor (7) comprises a reactor shell (103) vertical to the ground and a phase separator (111) at the upper part of the shell (103). An inner circulation zone is provided under the phase separator (111), and comprises a cylinder (114), a tapered diffusion section (115) and a guiding structure (104). In the hydrogenation method using the fluidized bed reactor (7), an expanded bed reactor (3) is used to further hydrogenate part of the product from the fluidized bed reactor (7), and supply catalyst without influencing on the stable operation of the fluidized bed reactor (7).

The invention provides a method for removing iron ion impurities in copper salt at high efficiency. The method comprises the following steps of: firstly, adding hydrogen peroxide of which the weight is 1-3% as heavy as that of a copper salt water solution into the copper salt water solution to be treated, adding metastannic acid of which the weight is more than 0.12% as heavy as that of the copper salt water solution, and carrying out absorbing, filtering, evaporating, cooling crystallization, separating and drying to obtain a product. According to the method for removing iron ion impurities provided by the invention, the metastannic acid is taken as a sinking agent, and the metastannic acid is large in specific surface and high in adsorption capacity, so that the iron ion oxidized by the hydrogen peroxide in the copper salt water solution is absorbed in the manner of ferric hydroxide. Compared with the existing deironing technology, the whole impurity-removing technology has the characteristic of being simple to operate, high in impurity removal rate, low in cost, and less in environment pollution. The iron ion impurity content of the copper salt treated by the method provided by the invention can be reduced to be less than 5ppm, so that the method is suitable for being used in the electronic industry and the printed circuit board industry.