175results about How to "Guaranteed extraction efficiency" patented technology

The invention relates to a method for refining and purifying polyformaldehyde dialkyl ether. By deeply researching the extraction unit technique of the polyformaldehyde dialkyl ether in the prior art, the invention finds out the reasons for influencing the extraction yield of the extraction unit and the purity of the extraction product, thereby providing a refinement extraction technique capable of enhancing the extraction yield and product purity. A proper amount of sodium hydroxide is added into the polyformaldehyde dialkyl ether balance product to remove formaldehyde in the polyformaldehyde dialkyl ether balance system. Under the refinement and purification conditions provided by the invention, the sodium hydroxide can easily break the complexation system between the formaldehyde and the polyformaldehyde dialkyl ether with different polymerization degrees, and the products with different polymerization degrees can be refined and purified by a conventional technique, such as distillation and the like.

The invention relates to a method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through a slurry reactor. The method comprises the step of: by adopting a slurry hydrofinishing reactor, conducting catalytic hydrofinishing to a polyoxymethylene dialkyl ether product-containing balance system so as to remove polyoxymethylene contained therein. By adopting the hydrofinishing method, the extraction rate of the polyoxymethylene dialkyl ether can be remarkably promoted, the purity of the polyoxymethylene dialkyl ether obtained through rectification is more than 99.5%, the yield is greater than 97%, and the atom utilization rate is close to 100%.

The invention relates to an intelligent filtering tissue box. The intelligent filtering tissue box comprises a tissue box body (1), a tissue box bottom plate (2), a top plate (4), at least one spring (5), a distance measuring sensor (8), a control module (6) , a power supply (7), a voice alarming module (9) and a filtering circuit (10), wherein the power supply (7), the voice alarming module (9) and the filtering circuit (10) are respectively connected with the control module (6); the top plate (4) is arranged above the tissue box bottom plate (2) through the springs (5) and is positioned in the tissue box body (1); and the distance measuring sensor (8) is arranged at the edge of the upper surface of the top plate (4). Through an upward force of the springs (5) on the top plate (4), a tissue under an extracted tissue can be fed into a tissue extracting opening (3) in time, and a user can use the tissue later conveniently. Moreover, by the distance measuring sensor (8), whether tissues in the tissue box run out or not can be detected, the user can be reminded of adding tissues, and tissue extracting efficiency of the tissue box is guaranteed effectively.

The invention discloses a testing and extracting device of Chinese herbal medicines. The testing and extracting device of the Chinese herbal medicines comprises an outer box body, wherein a heater isfixedly mounted on the inner bottom surface of the outer box body, an avoiding hole is formed in the center of the lower surface of the outer box body, open sliding grooves are formed in both two lateral surfaces of the inner part of the outer box body, guide rods are fixedly connected with the central parts of the inner parts of the open sliding grooves, guide blocks are glidingly connected ontothe outer surfaces of the guide rods, the outer surfaces of the guide blocks are glidingly connected to the inner lateral surfaces of the open sliding grooves, an inner box body is fixedly connected onto the inner lateral surfaces of the guide blocks, the outer surface of the inner box body is glidingly connected to the inner lateral surface of the outer box body, a sealing cover is in threaded connection with the upper surface of the inner box body, and positioning threaded holes are formed both in two sides of the upper surface of the sealing cover. The testing and extracting device of the Chinese herbal medicines can greatly improve the use convenience and stability to ensure the extraction efficiency through the outer box body and the structure of the inner box body glidingly connectedinternally.