5 results about "Organosulfate" patented technology

The invention discloses a molecular identification method for organic sulfate in PM2.5 based on LC-MS / MS. The molecular identification method is characterized by comprising the following steps: firstly, carrying out ultrasonic-assisted extraction on an atmospheric fine particulate matter sample by adopting ultrapure water, carrying out centrifugal separation, taking supernate, and filtering through a 0.45 mu m microporous filter membrane; then purifying the filtrate through a solid-phase extraction column, and purging and concentrating the collected eluent through nitrogen until the eluent is in a near-dry state to complete the enrichment of a target object; an LC-MS / MS combined electrospray ionization source (ESI) is adopted to perform mass spectrometric analysis on organic sulfate in atmospheric fine particulate matters in a negative ion mode, and structure confirmation of a target compound is realized. Compared with direct adoption of high-resolution mass spectrometry (FT-ICR MS), the method has the advantages that the sample pretreatment process is simplified, the analysis efficiency is remarkably improved, the powerful separation advantage and the high reliability advantage of LC-MS / MS are fully played, the organic sulfate in a complex matrix can be accurately identified, high-throughput and high-selectivity detection of the organic sulfate in the PM2.5 sample is achieved, and the method is suitable for large-scale popularization and application. The structure confirmation of the organic sulfate can be realized, and an analysis and confirmation integrated molecular identification method for the organic sulfate in the PM2.5 sample is provided.

To provide a binder composition for molding a mold, which can improve the final strength of the mold.SOLUTION: A binder composition for mold making, comprising: an acid-curable resin; and at least one surfactant selected from the group consisting of a nonionic surfactant and an anionic surfactant, wherein the nonionic surfactant comprises a glycol ether compound represented by the following general formula (I), and the anionic surfactant comprises an organic sulfate compound represented by the following general formula (II): R1-O - (AO) m-H (I) R2 - O - (AO) n - SO3M (II) SELECTED DRAWING: None

This invention belongs to the field of metal resource recycling, specifically relating to a method for separating and recovering valuable elements from rare earth and titanium associated resources. The separation method involves mixing associated raw materials containing rare earth and titanium with sulfuric acid and additives, blistering, and then calcining. Following this, water leaching is performed to obtain a rare earth-rich water leaching solution and a titanium-rich water leaching residue. The additives are organic sulfate esters or their water-soluble salts. The weight ratio of the associated raw materials, sulfuric acid, and additives is 1:0.2~0.8:0.03~0.2. The calcination temperature is 150~350℃. This invention innovatively uses the additives in conjunction with sulfuric acid to calcine rare earth and titanium associated resources. By synergistically controlling the additive component ratio and calcination temperature, the reaction mechanism and physicochemical structure can be optimized, unexpectedly achieving highly selective water leaching separation of rare earth and titanium.

The present invention provides a binder composition for molding a casting mold, comprising an acid-curable resin and at least one surfactant selected from a nonionic surfactant and an anionic surfactant, wherein the nonionic surfactant comprises a glycol ether compound represented by general formula (I), and the anionic surfactant comprises an organic sulfate ester salt compound represented by general formula (II). According to the present invention, it is possible to provide a binder composition for molding a casting mold, which can improve the final strength of the mold.　(I): R1-O-(AO) m-H (II): R2-O-(AO) n-SO3M

The invention provides a system for collecting, analyzing and processing organic matter components in atmospheric gaseous and particulate matters. The invention further provides application of the system for collecting, analyzing and processing the organic matter components in the atmospheric gaseous and particulate matter in detection of weak-polarity and / or polar organic matter components in the atmospheric gaseous and particulate matter. The invention further provides an orbital hydrazine mass spectrum rapid analysis method for organic matter components in atmospheric gaseous and granular substances. The invention further provides a method for detecting the organic sulfate components in the atmospheric gaseous and granular substances. According to the gas-gas state and particle state organic matter orbital hydrazine mass spectrum rapid analysis method and the processing system provided by the invention, an instrument is simple in structure, offline is not needed, only one-step pretreatment is needed, pretreatment loss and pollution are avoided, and determination can be carried out after spectrogram intelligent analysis on the instrument; the method is suitable for rapid quantitative analysis and non-targeted screening of organic matters in atmospheric gaseous and granular samples.