116 results about "Desorption time" patented technology

The invention relates to a device and a method for recovering oil gas by adopting a condensation-adsorption combined technology. The whole technical proposal is characterized in that a mixed gas of various oil gases and air generated during various storage and transportation processes enters a condensing unit with an integrative structure which consists of an evaporator, a compressor, a condenser and an oil water separator through a gas collecting tube; when being condensed to the temperature of about minus 5-5 DEG C, most of components over C5 are condensed and liquefied, and are delivered to a storage tank through a valve and an oil return pipe, or used directly; the rest small part of oil gas mixture passes through the valve and is delivered to an adsorption system by a vacuum pump P1 for further adsorption treatment; after being adsorbed and analyzed alternately by an adsorber A and an adsorber B, stripping gas containing oil gas is delivered to the storage tank by a vacuum pump 2 and the valve, or used directly; the effluent gas with the oil gas approximate to zero enters the atmosphere through an emptying pipe; the sorbent used by the two adsorbers is a phi3 cylindrical-shaped active carbon which is specially researched and used for the recovery of oil gas, and carry out vacuum desorption alternately under the action of the vacuum pump p2; and the desorption time is set to 15-20 minutes. The recovery rate of oil gas by utilizing the device and the method can reach over 98 percent, and the device and the method have the advantages of low cost and being beneficial to environmental protection.

The invention provides a vacuum pressure swing adsorption system, which comprises six adsorbers, two groups of independent blowers and three groups of independent vacuum pumps, wherein each group of blowers are connected with the inlet ends of four adsorbers respectively, each group of vacuum pumps are connected with the inlet ends of two adsorbers respectively, the inlet end of each adsorber is communicated with the atmosphere, the outlet ends of the two adsorbers connected with the each group of vacuum pumps are connected, and the outlet end of each adsorber is connected with a product gas tank. The vacuum pressure swing adsorption system cyclically executes the following steps of: adsorption, forward pressure release, vacuum desorption and pressure charge, wherein the ratio of the execution time of the adsorption step to the execution time of the vacuum desorption step is less than 1. The system can enlarge oxygen production scale, reduce the air quantity of the blowers, prolong the vacuum desorption time and reduce the pumping speed of the vacuum pumps so as to reduce energy consumption of the system and save the cost.

The present invention relates to the extraction method of Jinggang adriamycin. In the method, Jinggang adriamycin fermentation liquid is heated to the temperature between 100 DEG C and 120 DEG C for 5 minutes to 60 minutes. Then the Jinggang adriamycin fermentation liquid is filtered. The filtrate experiences the ion exchange and adsorption through the extra-large positive ion resin adsorption net. And then 0.1-1.5mol per L ammonia solution is used as eluant which cleans the extra-large positive ion resin adsorption net of Jinggang adriamycin. The eluant is collected and vaporized under low pressure to get rid of ammonia gas. After that, crud Jinggang adriamycin A product is achieved, which is further processed to generate Jinggang adriamycin. The method is of short technological process, large absorption quantity, short desorption time, little wastewater emission and low cost.

The embodiment of the invention discloses a method and device for testing gas containing data of rock. The method comprises the steps of placing the rock to be tested into a desorption device for natural desorption, and monitoring desorption rate; obtaining the function relationship between the desorption rate and desorption time through fitting, and calculating the volume of lost gas according to the function relationship; conducting natural desorption till it is monitored that gas in the rock to be tested is completely desorbed, and measuring the volume of desorbed gas obtained from natural desorption and fast desorption; adding the volume of the lost gas and the volume of the desorbed gas together to obtain total volume, and then obtaining the gas content of the rock to be tested through calculation. By the adoption of the embodiments of the invention, testing processes can be effectively simplified, and the accuracy of a test result is improved.

The invention discloses a method for preparing glutamic acid surface molecularly imprinted polymer silica microspheres. The method includes the steps that a dilute hydrochloric acid soaking method is adopted, impurity removal is conducted on the surfaces of the silica microspheres, and activated silica microspheres are obtained; surface silanization modification is conducted on the activated silica microspheres, and silanization silica microspheres are obtained; RAFT functionalized processing is conducted on the silanization silica microspheres, and RAFT functionalized silica microspheres with the surfaces grafted with double sulphur ester bonds are obtained; template molecules and functional monomers are fully and uniformly mixed, then a cross-linking agent, initiator and the RAFT functionalized silica microspheres are added, a polymerization reaction occurs, and the molecularly imprinted polymer silica microspheres with the surfaces wrapped by the template molecules are obtained; elution is conducted to remove the template molecules. The surface molecularly imprinted polymer silica microspheres prepared through the method are uniform in wrapping and stable in performance, absorb L-glutamic acid selectively under a water environment and have the advantages of being short in absorption / desorption time and simple in operation.

The invention discloses a solid-phase micro-extraction determination method for trace aromatic amine in urine. The method comprises the following step of carrying out qualitative and quantitative analysis on the trace aromatic amine in the urine by adopting a headspace solid-phase micro-extraction and gas chromatography-mass spectrometry / mass spectrometry (GC-MS / MS for short) technology. The method is characterized in that a coating material of solid-phase micro-extraction fibers is a composite material (JUC-Z2 / Gel for short) formed by a covalent organic framework JUC-Z2 and gel; the extraction temperature is 70 to 90 DEG C, the stirring speed is 400 to 600r / min, the extraction time is 30 to 50min, the desorption temperature is 230 to 260 DEG C and the desorption time is 0.5 to 1min. According to the method disclosed by the invention, the solid-phase micro-extraction fibers, which are specially manufactured and are attached with a JUC / Z2-Gel coating, are used for carrying out extraction and concentration pre-treatment on a sample; the method has the technical characteristics of convenience for operation, high sensitivity, good recovery rate and the like.

The invention discloses an oil gas recovery device and a method of coating adsorption combination technology, belonging to a technology method combing film separation technology with film adsorption technology to recover and treat oil gas. In the method, mixed gas of various oil gases and air, produced in various storing and transporting processes, is sent into an oil gas separator via a gas header to be preliminarily separated, and mixed gas of granule oil gas and air enters a film separator for further separation under the action of the differential pressure of a vacuum pump P1; air which isseparated from the film separator and contains a small amount of oil gas enters an absorber A or an absorber B for adsorption processing; adsorbed air almost containing no oil gas is discharged intoatmosphere via a discharging port. In addition, large-grain oil drops separated by the separator, penetration gas enriched by the film separator and desorption gas which is desorbed from the absorberA or the absorber B are sent into an underground storage tank via an oil return pipe or directly used. Adsorbent in two absorbers is cylindrical activated carbon specially used for recovering oil gas,two absorbers alternately perform vacuum desorption under the action of a vacuum pump P2 with desorption time being15-20 minutes. The oil gas recovery rate of the invention can reach more than 98%, has almost zero discharge of oil gas in effluent gas and can obtain obvious environment benefit and economic benefit.

The invention discloses a process for extracting astaxanthin from prawn shells. The process specifically comprises the steps of soaking prawn shells in hydrochloric acid solution, taking the prawn shells out, washing the prawn shells with water to neutral, and conducting drying and smashing to obtain prawn shell powder; conducting desorption on the prawn shell powder with 70-100 v / v% ethyl alcohol serving as the desorption agent, then adding sig water for extraction at 70-80 DEG C, collecting extracting solution, conducting extraction with an organic solvent, and conducting drying to obtain astaxanthin. During desorption, the ratio of the volume mL of the desorption agent to the mass g of the prawn shell powder is larger than or equal to 8, and desorption time is longer than or equal to 25 min. Sodium hydroxide solution, potassium hydroxide solution or calcium hydroxide solution of 0.5-1.5 mol / L serves as the sig water, and the ratio of the usage amount mL of the sig water to the mass g of the prawn shell powder is larger than or equal to 20. Each time of extraction is longer than or equal to 4 min. According to the method, the prawn shells are treated with ethyl alcohol, consumption is low, cost is low, extraction time is short, extraction rate is high, and the extracting solution is transparent and low in impurity content.

Compositions and methods for mass spectroscopy are disclosed. The compositions and methods relate to the analysis of proteins and other biopolymers using mass spectroscopy, particularly matrix-assisted laser desorption time-of-flight mass spectrometry (MALDI-TOF MS).

Methods and systems for delivering a liquid sample to an ion source for the generation of ions and subsequent analysis by mass spectrometry are provided herein. In accordance with various aspects of the present teachings, MS-based systems and methods are provided in which the flow of desorption solvent within a sampling probe fluidly coupled to an ion source can be selectively controlled such that one or more analyte species can be desorbed from a sample substrate inserted within the sampling probe within a decreased volume of desorption solvent for subsequently delivery to the ion source. In various aspects, sensitivity can be increased due to higher desorption efficiency (e.g., due to increased desorption time) and / or decreased dilution of the desorbed analytes. The methods and systems described herein can additionally or alternatively provide for the selective control of the flow rate of the desorption solvent within the sampling interface so as to enable additional processing steps to occur within the sampling probe (e.g., multiple samplings, reactions).