12 results about "Glycol dehydration" patented technology

The utility model relates to the technical field of ethylene glycol dehydration, in particular to a dehydration mechanism which comprises a dehydration device, a dehydration tower shell and an outlet, the right end of the dehydration device is fixedly connected with the dehydration tower shell, the right end of the outer side of the dehydration tower shell is fixedly connected with the outlet, and the left end of the inner side of the outlet is fixedly connected with dust isolation cotton. The inner side of the lower end of the dehydrating tower shell is fixedly connected with a bearing, one side of the bearing is fixedly connected with a motor, the tail end of the upper side of the motor is fixedly connected with a rotating cylinder, the inner side of the upper end of the rotating cylinder is fixedly connected with a supporting rod, and the outer side of the rotating cylinder is fixedly connected with a scraper. The motor drives the rotating cylinder to rotate, so that the scraper on the outer side of the rotating cylinder clings to the inner wall of the dehydrating tower shell can clean and collect condensed coke into the collecting box, the interior of the dehydrating tower can be effectively decoked in the ethylene glycol dehydrating process, the heat transfer efficiency of the inner side of the dehydrating tower is enhanced, and the ethylene glycol extracting efficiency is improved.

This invention relates to an apparatus and method for recovering methanol and ethanol through methanol distillation coupled with ethylene glycol distillation. The method includes the following steps: collecting fusel oil from the side stream of the atmospheric distillation column, cooling it, and adding alkali to obtain alkali-treated fusel oil; mixing the alkali-treated fusel oil with the feed from the ethylene glycol dehydration column to obtain pretreated fusel oil; the pretreated fusel oil entering the ethylene glycol dehydration column from the middle section, and collecting fuel ethanol from the side stream of the middle section and methanol from the top of the column. This method recovers methanol and ethanol with low modification costs and high recovery rates without excessive site occupation or the need for new construction projects, thus generating economic benefits.

Systems and methods presented herein generally relate to recycling, or reducing flaring or venting, of vent gases from glycol based dehydration of natural gas. Some systems and methods use high pressure gas, high pressure glycol, or pump-assisted high pressure glycol to provide motive energy to draw reflux gas and / or skimmer gas through one or more venturis and back to the contact tower of the dehydration system. Some systems and methods provide for harvesting energy from the dehydration process.

The invention discloses a method for preparing monovinyl glycol ether by dehydrating glycol, which comprises the following steps of: enabling glycol with a structural formula of HOCH2CH2 (OCH2CH2) nOH (n is a positive integer) to pass through a bed filled with a supported solid base catalyst, and reacting under the reaction conditions that the reaction temperature is 350-500 DEG C, the system pressure is 0.01-1.00 MPa, the weight space velocity of glycol liquid is 0.05-5.00 h <-1 > and the volume space velocity of diluted gas is 0-5000 h <-1 >, and preparing the monovinyl glycol ether with a structural formula of CH2 = CH (OCH2CH2) nOH. The method has the advantages of high selectivity of vinyl hydroxyl ether products, low production cost, large-scale device, simple reaction process and safe and environment-friendly process.

A set of process equipment for use in an enhanced oil recovery (EOR) process comprises first piping, a dehydrator, second piping, and a natural gas liquids recovery column. The first piping is configured to receive a wet carbon dioxide recycle stream from a recovery well. The dehydrator is configured to receive the wet carbon dioxide stream from the first piping and configured to dehydrate the wet carbon dioxide recycle stream using ethylene glycol to produce a dry carbon dioxide recycle stream. The second piping is configured to receive the dry carbon dioxide recycle stream from the dehydrator. The natural gas liquids recovery column is configured to receive the dry carbon dioxide recycle stream from the second piping and configured to separate the dry carbon dioxide recycle stream into a carbon dioxide reinjection stream and a natural gas liquids stream.

The invention discloses preparation and application of a catalyst for preparing acetaldehyde through ethylene glycol dehydration, and belongs to the technical field of chemical engineering. The catalyst is an acidic molecular sieve, and the molecular sieve is selected from one or a combination of more than two of molecular sieves of which the structure types are MWW, FER, MFI, MOR, FAU and BEA; the molecular sieve is prepared by sequentially carrying out organic ammonium salt exchange, acidic molecule loading and ammonium ion exchange and then roasting. The catalyst disclosed by the invention is mild in catalytic condition, simple in preparation process, easy to industrially amplify and easy to recycle, has relatively high catalytic activity in the process of preparing acetaldehyde by dehydrating ethylene glycol, and has a very good application prospect.

The application discloses a preparation method of diethylene glycol, which comprises the following steps: contacting ethylene glycol with a catalyst, and reacting to obtain the diethylene glycol; the catalyst is SO4 2‑ / ZnFeO4-ZrO2 obtained by impregnating the surface of ZnFeO4 loaded with ZrO2 with sulfuric acid. The catalyst provided by the application is applied to a diethylene glycol dehydration reaction for preparing diethylene glycol, so as to improve the conversion rate of ethylene glycol and the selectivity of the generated diethylene glycol.

The application discloses a refining device and method and application of a polymerization product, and the refining device comprises a de-aldehyde tower, a de-watering tower, a water distribution tank, a light component removing tower, a by-product tower and a product tower. The reaction product obtained through the dehydration condensation reaction of ethylene glycol contains components such as water, acetaldehyde, diethylene glycol, 1,4-dioxane and 2-methyl dioxolane, and has the characteristics of complex components and multiple azeotrope pairs. The application provides a sequential rectification method by introducing azeotrope-breaking components for the components, so that the diethylene glycol product with high purity and the acetaldehyde and 1,4-dioxane by-products are separated, the process is continuous and easy to operate, and has industrial feasibility.

The application discloses a preparation method of 1,4-dioxane, which comprises the following steps: reacting ethylene glycol with a catalyst to obtain 1,4-dioxane; and the catalyst is HClO4 / pure silicon molecular sieve. The catalyst provided by the application is applied to the dehydration reaction of ethylene glycol to prepare 1,4-dioxane, so as to improve the conversion rate of ethylene glycol and the selectivity of the generated 1,4-dioxane.

The invention relates to the field of pervaporation dehydration, in particular to a method for dehydrating ethylene glycol feed liquid with high conductivity. The SSZ-13 molecular sieve membrane with a high silica-alumina ratio is adopted as a key membrane material, good stability can be kept in pervaporation dehydration of ethylene glycol feed liquid with the conductivity of 50-2000 [mu] S / cm, and the dehydration capacity of the membrane material on ethylene glycol dehydration is further improved by modifying the membrane material.

The application discloses a kind of ethylene glycol predehydration tower device and its use method, belong to ethylene glycol dehydration technical field, including for the predehydration of ethylene glycol aqueous solution ethylene glycol predehydration tower, it is characterized by: in the ethylene glycol predehydration tower from top to bottom installation mist pad, spraying device, first elastic tray, second elastic tray, third elastic tray and fourth elastic tray, wherein, first elastic tray, second elastic tray, third elastic tray and fourth elastic tray are identical in structure, and the passage of flexible valve as vapor-liquid outlet is provided in the elastic tray, and the opening degree of flexible valve is automatically adjusted according to the change of vapor-liquid flow, and it also has downcomer, for the liquid of upper tray is introduced to the tray of lower part, the condensate of upper tray is introduced to the tray of lower part and gas phase is contacted and mixed, solve the technical problems that the operation flexibility of ethylene glycol predehydration tower is low and the predehydration effect is poor, mainly applied to ethylene glycol predehydration.

The application discloses a preparation method of 1,4-dioxane, which comprises the following steps: reacting ethylene glycol with a catalyst to obtain 1,4-dioxane; the catalyst is SO4 2‑ / HTaMoO6. The catalyst provided by the application is applied to the reaction of preparing 1,4-dioxane by dehydrating ethylene glycol, so as to improve the conversion rate of ethylene glycol and the selectivity of the generated 1,4-dioxane.