49 results about "Residual water content" patented technology

In a pin tenter, a wet film is conveyed and dried in a state that edges of the wet film are pierced by pins. The plurality of pins are fixed to a pin plate. The pin plate is supported by a pin carrier. The pin carrier is disposed between rails. Movement of the pin carrier is guided by the rails. In a steam cleaning area, foreign substances adhered to the pins, the pin plates, and the pin carriers are removed by blowing steam. In a jet gas cleaning area, residual foreign substances and residual water content after the steam cleaning are blown off and removed by blowing nitrogen gas.

The invention refers to a Process for preparing a bio-resorbable polyester the form of a powder with a bulk density of 0.3 g / ml or more, a tapped density of 0.4 g / ml or more and a specific surface area of 2.0 m2 / g or less comprising the steps a. dissolving a bio-resorbable polyester in a first solvent to form a polymer solution, b. contacting the polymer solution with a second solvent which is a non-solvent for the bioresorbable polyester and which is mainly water to result the precipitation of the bio-resorbable polyester in the form of a wet polymer mass, c. pre-drying the wet polymer mass at a temperature below the TgO of the bio-resorbable polyester, d. comminuting the pre-dried polymer mass to polymer particles with a size below 10 mm, e. drying the comminuted polymer particles below the TgO of the bio-resorbable polyester to a residual water content of 1% or less by weight / weight, f. post-treatment of the polymer particles from step e at a temperature in the range from the TgO to the TgE of the bio-resorbable polyester, g. comminuting the polymer particles from step f to a powder with a particle size of d50 of 1-300 μm and d90 of more than 30 and up to 3000 μm.

The invention relates to the technical field of steam path control devices for drilling engineering in oil fields, in particular to an alcohol-spraying type steam path anti-freezing device for oil drilling. The steam path anti-freezing device comprises a water-steam separator, an alcohol tank and an alcohol funnel, wherein a steam intake pipe communicated with an inner cavity of the water-steam separator is fixedly installed on the left side wall of the water-steam separator; a steam escaping pipe communicated with the inner cavity of the water-steam separator is fixedly installed on the right side wall of the water-steam separator; a sewage draining pipeline communicated with the inside of the water-steam separator is fixedly installed at the bottom of the water-steam separator; and a sewage draining valve is fixedly installed on the sewage draining pipeline. The steam path anti-freezing device provided by the invention has a reasonable and compact structure and is convenient to use, and also has the advantages that the steam path of a steam controlling system is effectively prevented from being frozen in winter by separating the residual water content from the compressed air and lowering the freezing point of the residual water content, so that the working intensity of the workers is reduced, and the safety of equipment and personnel in a drilling well is ensured, the cost is saved, the unnecessary time consumption is reduced, the drilling speed is improved, and the well constructing period is shortened.

The invention belongs to the technical field of ceramic packaging containers, specifically a ceramic container, including a basin, an absorbing mechanism, an injection mechanism, a cleaning mechanism and an indicating mechanism; a water storage tank is provided in the basin; Absorption mechanism; the absorption mechanism includes a blocking block; the inner end of the blocking block is elastically connected to the inner wall of the water storage tank, and a filter screen is fixedly connected around the front surface of the blocking block; an injection mechanism is arranged in the basin; The injection mechanism includes a working tube, a No. 1 working chamber, a No. 2 working chamber, a slider, a water delivery pipe and a dispersing hole; There is a No. 1 working chamber in the tube; the invention is mainly used to solve the problem that the existing ceramic flowerpots cannot check the residual moisture of the flowerpots in real time, and the excess rainwater cannot be collected in rainy weather and needs artificial watering.

The present invention relates to a new process for producing methane chloride by using liquid-phase catalytic method and pressurization process. The hydrogen chloride and methyl alcohol are mixed according to a certain ratio, then placed in a tank reactor with catalyst, and under the condition of a certain temp. and pressure the invented methane chloride can be synthesized. It adopts acid / water washing and alkali-washing processes to remove unreacted methyl alcohol and hydrogen chloride, and adopts concentrated sulfuric acid washing process to remove residual water content and reaction by-product dimethyl ether, then the purified and dried methane chloride gas is undergone the processes of compression and condensation so as to obtain high-purity liquid methane chloride product.

The present invention provides a method for preparing a dispersion of a highly fluorinated ion exchange polymer, wherein the dispersion of the highly fluorinated ion exchange polymer is atomized and released in a first liquid comprising at least 10% by weight of an organic liquid into a hot gas to produce flowable particles of a highly fluorinated ion exchange polymer with a dry surface / exterior and an interior residual moisture content of at least 4% by weight. The particles are dispersed in a second liquid to prepare a second dispersion of a highly fluorinated ion exchange polymer from which proton exchange membranes and electrodes for fuel cells can be prepared.

The invention discloses a preparation method for 3-hydroxyl benzoate, which comprises the following steps: aqueous solution of the 3-hydroxyl benzoate is prepared, and by adopting the processing method of spray drying, the 3-hydroxyl benzoate is obtained. The product obtained by adopting the method is even in particle size, low in residual water content, high in yield and purity, and good in fluidity.

An ion exchange resin vacuum drying test method is disclosed. The method includes heating a cuvette containing a small amount of a resin sample in an oil bath; after the resin is heated for certain time, condensing and collecting generated water vapor through a U-shape tube disposed in an ice water bath, collecting a small amount of non-condensable gas through a three-neck distillation flask, analyzing components and contents of the condensate and the non-condensable gas by adopting a gas chromatograph, and measuring the residual water content of the resin sample, and therefore the degree of thermal degradation and drying effects of the resin sample at different temperatures for different heating time periods can be obtained. The method and an ion exchange resin vacuum drying test device which are provided can simulate a drying process of ion exchange resin under vacuum so as to analyze thermal degradation behaviors of the resin.