55 results about "Dimethyl trisulfide" patented technology

The invention discloses a method for preparing algae powder by drying no-odor blue algae, which belongs to the technical field of drying. The method of the invention is divided into a cyanobacteria drying part and a tail gas deodorizing part. According to the method of the present invention, the moisture content of the algae powder is not more than 10%, the protein content is not less than 30%, and the ash content is not more than 50%, which can remove geosmin, dimethyl disulfide, dimethyl isobutyrol, dimethyl Characteristic odor components such as trisulfide, phenol, and methyl indole. Compared with low-temperature and long-term drying, rapid drying can not only greatly reduce the production of cyanobacteria odorous molecules, but also ensure the quality of cyanobacteria dry powder and reduce the loss of protein content. Therefore, the present invention has the advantages of less energy consumption, low operating cost, and can effectively reduce the molecular weight of malodorous produced in the drying of blue-green algae.

The invention relates to an absorption and biological treatment method of malodorous waste gas. The malodorous waste gas enters a spray absorption tower to have an absorbing, humidifying and cooling function, and then enters into a biological dripping and filtrating device and contacts with a biological film attached to the surface of the filler in the process of rising to be degraded into odorless compounds, and then the purified gas is discharged. The residence time of a vacant bed is 11 to 45 seconds. Part of the waste water produced when spraying and absorbing can be used as biological circulating water, which can be reused again as spraying water after the biochemical treatment. The absorption and biological treatment method of the invention can effectively remove the odor polluting matters such as organic amine, ammonia gas, hydrogen sulfide, mercaptan type, dimethyl sulfide (DMS), dimethyl disulfide (DMDS), styrene, volatile organic compounds (VOC), dimethyl trisulfide, benzylamine, carbon disulfide, carbonyl sulfide, etc. and all kinds of malodorous smells, most of which are poisonous and a plurality of which are carcinogens. The deodorization effect can reach 99 percent, which can discharge by reaching the standard and can be applied to a deodorization and purification treatment of the large-capacity matters polluted by different malodorous gas with low concentration.

The invention provides a method for preparing dimethyl disulfide by virtue of a methanthiol sulfidization method. The method comprises the specific steps of filling a tower-type reactor with a solid catalyst and then filling the tower-type reactor with a mixed solution containing dimethyl disulfide, dimethyl trisulfide and dimethyl polysulfide, keeping the solid catalyst to be immersed in the solution inside the tower, spraying powdery sulfur into the solution and continuously introducing impure methanthiol gas from the bottom of the tower-type reactor; enabling the produced hydrogen sulfide gas to return inside a thiol reactor by virtue of the tower top and synthesizing methanthiol from thiol and methanol, extracting a mixture of dimethyl disulfide, dimethyl trisulfide and dimethyl polysulfide, rectifying to obtain dimethyl disulfide, further introducing a mixed solution of byproducts dimethyl trisulfide, dimethyl polysulfide and a small amount of dimethyl disulfide into the tower-type reactor to complete the circular reaction. The conversion rate of sulfur can be not less than 99.0%, the content of bottom product dimethyl polysulfide is 0.5%-1% (in mass percentage) and the purity of dimethyl disulfide by virtue of primary rectification is not more than 99.5%.

Dimethyl trisulfide (DMTS) antidote compositions may be used to as a cyanide poisoning antidote.