49results about How to "High unit content" patented technology

The invention discloses a preparation method of a recyclable surface film of an inferior vena cava filter based on (PEG) polyethylene glycol-like, which comprises the following steps of: feeding the inferior vena cava filter in a plasma polymerization vacuum chamber; when the vacuum degree reaches 0.5Pa, introducing argon gas with the flow of 2.5sccm and carrying out sputter cleaning for 15 minutes under the conditions that the radio-frequency power is 100W and the negative bias voltage is 80V; after the sputter cleaning is finished, vacuumizing the vacuum chamber to be 0.5Pa again; and introducing a reacting gas of tetraglycol dimethyl ether and depositing a plasma polymer thin film for 30-120 minutes under the conditions that the work pressure is 2-5Pa, the radio-frequency power is 5-30W, the negative bias voltage is 80V and the pulse duty factor is 10-100 percent. The inferior vena cava filter prepared by the method disclosed by the invention has strong binding force between the surface-like PEG thin film layer and the inferior vena cava filter and excellent bioremediation performance for resisting protein and cell from adhering.

The invention relates to an extraction method of effective ingredients of peppers, in particular relating to an efficient extraction and separation technology for effective ingredients of peppers, comprising the following steps: (1) pulverization: pulverizing pepper raw materials at the temperature of 0-5 DEG C; (2) extraction and separation of the aroma ingredient of the peppers: adding pepper powder into an extraction kettle, and carrying out variable frequency ultrasonic extraction; causing mixed gas to successively enter an analytical kettle 1 and an analytical kettle 2 to collect the aroma ingredient of the peppers; and (3) extraction and separation of the spicy ingredient of the peppers: lowering the pressure of the extraction kettle to be less than or equal to 7.3MPa, then slowly raising the extraction pressure to 25-30MPa, maintaining ultrasonic frequency of 10-50khz, power of 1200w, the pressure of the analytical kettle 1 of 6-8MPa, and the pressure of the analytical kettle 2 of 4-6MPa; and collecting the numb-taste components of the peppers. The extraction method has the advantages that the process is simple, no organic solvent is adopted, and a pure physics method is adopted for extraction, and the obtained product is high in yield and high in unit content.

The present invention provides a polyester resin having 1,4-CHDA as the main dicarboxylic acid units, having isomerization of trans-1,4-CHDA suppressed in the esterification and polyconsensation reactions and having a high melting point and excellent heat resistance, and a process for its production. A polyester resin obtainable by preparing an oligomer by an esterification reaction of a dicarboxylic acid component containing 1,4-cyclohexane dicarboxylic acid as the main component, with a diol component, and polycondensing this oligomer in the presence of a polycondensation catalyst; and a process for producing a polyester resin characterized in that the esterification reaction is carried out by means of a basic compound, and then, the polycondensation reaction is carried out by means of a polycondensation catalyst. In the resent invention, T0 and Tp satisfy 0 |{(T0-Tp) / T0}100 |12 where T0 is the mol% of the trans form in the 1,4-cyclohexane dicarboxylic acid contained in the starting material, and Tp is the mol% of the trans form in the 1,4-cyclohexane dicarboxylic acid units contained in the obtainable polyester resin.

The invention discloses a supported double-metal cyanide catalyst and a preparation method and application thereof. The supported double-metal cyanide catalyst uses hydrotalcite as the supporter, double-metal cyanide is supported on the supporter, and the supported double-metal cyanide catalyst uses polyethylene glycol as the chelating agent. The preparation method includes: using zinc chloride and metal cyanide as precursors, dripping the aqueous solution of central metal into a ligand substance solution for reaction, adding the supporter and the chelating agent at the same time, and performing centrifugal separating and drying to obtain the supported double-metal cyanide catalyst. The invention also provides a preparation method using the supported double-metal cyanide catalyst to prepare carbon dioxide-epoxide copolymer. Compared with same-type catalysts, the supported double-metal cyanide catalyst has the advantages that the catalyst is high in catalyzing activity and good in product selectivity; when the catalyst catalyzes carbon dioxide to have copolymerization reaction with epoxides, the carbonic ester unit content of the copolymerization product is high, the cyclic carbonate content of the copolymerization product is low, and the catalyst is high in actual application value and promising in market prospect.

The invention belongs to the field of the high polymer material, which relates to a class of carbon dioxide based high polymer material with the crystallization performance. The carbon dioxide based high polymer material with the crystallization performance is characterized in that end position alkyleneoxide containing an electrophilic group and carbon dioxide are copolymerized to form crystallizable polycarbonate material with an identical height structure under the action of catalyst. The polycarbonate has the following characteristics that the content of a carbonate ester unit in a polymer chain is 90-100%, and the identical structure of the polymer is between 80.0% and 99.9%; after the polymer is hydrolyzed by sodium hydroxide aqueous solution, the enantiomer selectivity of glycol obtained by measurement is 80.0% and 99.9%; and the polycarbonate with the crystallization performance can be obtained through carrying out simple thermal treatment on the polymer. The polycarbonate material provided by the invention has the advantages of big possibility of crystallizing, strong thermal deformation resistance and the like.

In an existing preparation of zeaxanthin crystals, a large amount of alkaline colored waste water is produced in a washing and purification stage, the cost of environmental treatment is high, and environmental pollution is caused by emissions. The invention discloses a production process of finally preparing zeaxanthin crystals from marigold oil resin without waste water through a series of processes. The preparation method of the zeaxanthin crystals from the marigold oil resin without waste water is characterized in that the preparation method includes the steps of taking the marigold oil resin as raw material to be heated to a certain temperature in anhydrous or slightly watery conditions so that lutein esters are saponified in alcoholic solution of alkali and finally isomerized to zeaxanthin, using low-boiling anhydrous or low water content alcohol to wash saponification mixture, and recovering most alcohol solvent through vacuum distillation after the collection of the lotion; thesolvent can be reusable, remaining solid dry matter can be used directly as feed additives, and the cleanly-wasted zeaxanthin crystals can be used as food additives raw material without recrystallization.

The invention discloses traditional Chinese medicine tea for preventing and relieving urinary tract infection and a preparation method thereof. The traditional Chinese medicine tea is prepared from the following raw materials in parts by weight: 7 to 10 parts of flos taraxaci, 3 to 5 parts of honeysuckle flowers, 3 to 5 parts of flos chrysanthemi and 5 to 10 parts of red dates. The preparation method of the traditional Chinese medicine tea comprises the following steps: pulverizing the flos taraxaci, the honeysuckle flowers and the flos chrysanthemi to obtain mixed flower materials; then soaking the mixed flower materials with ethanol in a mixing manner to obtain an ethanol soaking solution; adding acetic acid bacteria into the ethanol soaking solution after the ethanol soaking solution isdiluted and introducing oxygen for fermentation; then adding the red dates and continuously performing fermentation; then performing concentration and pelletization. According to the traditional Chinese medicine tea for preventing and relieving urinary tract infection and the preparation method thereof disclosed by the invention, by using the flos taraxaci as monarch drugs, using the honeysuckleflowers and the flos chrysanthemi as ministerial drugs and using the red dates as adjuvant drugs, complementary gain is achieved; through a way of soaking and fermentation, the pharmacological activity is more stable and lasting; due to the combination of the four medicines, the traditional Chinese medicine tea has the effects of clearing away heat and toxic materials, inducing diuresis for treating stranguria and eliminating inflammation and relieving pain, and has a definite curative effect on the urinary tract infection.

The invention relates to a combustion device which can improve the combustion efficiency of a burner, save fuel and reduce environmental pollution. The manufacturing device communicates with the combustion-supporting gas homogeneous mixer to form a combustion-supporting gas conveyor, and the output end of the homogeneous mixer is delivered to the combustion chamber through a gas-air mixing buffer. During work, while sending air into the combustion chamber of the burner, the combustion-supporting gas is sent into the combustion chamber of the burner through the combustion-supporting gas conveyor. By increasing the volume of the combustion-supporting gas and reducing the volume of air entering the combustion chamber, the fuel can be consumed Complete combustion, improve combustion efficiency, reduce NOX and CO emissions.

The invention discloses an industrial production method of rough glycyrrhizic acid. The industrial production method comprises the following steps: drawing liquorice roots into shreds or powder through a drawing machine; extracting by taking hot water as an extracting solvent to obtain an extracting solution; cooling extracted material liquid; after finishing cooling, centrifuging to obtain clarified material liquid; carrying out acid regulation on the centrifuged material liquid in an acid tank; after finishing the acid regulation, standing and carrying out acid precipitation for 2h to 5h; filtering material liquid subjected to the acid precipitation; washing a filtered solid with water to obtain a wet product; drying the wet product to obtain a rough glycyrrhizic acid product. By adopting hot water countercurrent circular extraction and combining a cooling and impurity removing process, a water resource is saved and the extraction rate of the product is guaranteed; a post-period purification process is simple and easy to operate and the unit content of the obtained rough glycyrrhizic acid product is more than or equal to 45 percent; industrial production is easy to realize.