12 results about "Acetone product" patented technology

The invention discloses a method for resourceful treatment of furfural wastewater, and belongs to the field of industrial wastewater treatment. A method for resourceful treatment of furfural wastewater comprises the following steps: primary neutralization: adding an alkaline substance to neutralize the furfural wastewater until the furfural wastewater is neutral, converting acetic acid in the furfural wastewater into acetate through a neutralization reaction, and fixing acetate; primary evaporation: carrying out evaporation treatment on the furfural wastewater after the primary neutralization reaction by using a wastewater evaporator to obtain an evaporation concentrated solution; double decomposition: adding acid into the evaporation concentrated solution, and decomposing acetate into salt and acetic acid through double decomposition reaction; secondary evaporation: evaporating a product of the double decomposition reaction, and collecting condensate to obtain an acetic acid solution; secondary neutralization: adding an alkaline substance to neutralize the acetic acid solution obtained by secondary evaporation until the acetic acid solution is neutral, and adjusting COD (Chemical Oxygen Demand) to be more than 25000 to serve as a carbon source for biological sewage treatment; and evaporating to obtain an acetate solid as a raw material for preparing an acetic acid or acetone product.

Methods and systems for the production of acetone from cumene hydroperoxide (CHP) are disclosed. The disclosed methods involve cleaving CHP to form a cleavage product stream. In some embodiments, the cleavage product stream is separated into an overhead stream and a bottoms stream. The bottoms stream is neutralized, washed, and then processed in a crude acetone column to provide a crude acetone stream. The overhead stream of the cleavage product is flashed forward in the method, bypassing neutralization, washing, and the crude acetone column, and then combined with the crude acetone stream. The combined acetone stream is provided to an acetone product column. According to some embodiments, the acetone product column includes a side draw for obtaining a recycle acetone stream, which is recycled to the cleavage reactor(s). The recycle acetone side draw can be located lower on the acetone product column than the point at which product acetone is obtained. The disclosed methods improve process efficiency.

This invention discloses a method for recycling and reusing off-grade BPA, comprising the following steps: 1) simultaneously feeding off-grade BPA and alkaline solution into a dissolving tank for mixing and dissolution to obtain a raw material solution; 2) heating the raw material solution and feeding it into a cracking reactor packed with a solid alkaline catalyst, where a cracking reaction yields a cracked liquid containing phenol base / phenol / acetone; 3) feeding the cracked liquid into a distillation column for distillation separation, obtaining acetone as a side stream and a phenol base / phenol solution as the bottom of the column; 4) feeding the phenol base / phenol solution and an inorganic acid together into a static mixer for neutralization reaction to obtain a neutralized reaction liquid; 5) feeding the neutralized reaction liquid into a separator for separation to obtain a phenol oil phase and an aqueous phase containing phenol; 6) feeding the aqueous phase containing phenol into a resin bed for adsorption to remove phenol, and discharging the wastewater after it meets the standards. This method can efficiently decompose off-grade BPA and obtain phenol and acetone in high yield.

The present application relates to the technical field of electronic grade reagent, and particularly relates to a refining method of acetone and an electronic grade acetone product thereof. The purity of the acetone product is not less than 99.99%, the water content in the acetone product is not higher than 100 ppm, the content of aldehyde compounds is not higher than 3 ppm, and the evaporation residue content is not higher than 1 ppm. The refining method of acetone comprises the following steps: the crude acetone is contacted with a mixed solution containing an oxidizing agent and a strong base, and then the electronic grade acetone product is obtained through rectification, dehydration, deionization and microparticle removal. The refining method of acetone in the present application can obtain the electronic grade acetone product suitable for higher requirement semiconductor application scenarios. The electronic grade acetone product in the present application has good quality and high purity, and the content of aldehyde compounds and the evaporation residue content in the acetone product are both very low, so that the electronic grade acetone product can be suitable for higher requirement semiconductor application scenarios.

The invention relates to the technical field of electronic-grade reagents, in particular to an acetone refining method and an electronic-grade acetone product thereof. The purity of the acetone product is not lower than 99.99%, and in the acetone product, the water content is not higher than 100 ppm, the content of aldehyde compounds is not higher than 3 ppm, and the content of evaporation residues is not higher than 1 ppm; the refining method of acetone comprises the following steps: contacting an acetone crude product with a mixed solution containing an oxidizing agent and a strong base, and then carrying out rectification, dehydration, deionization and particle removal to obtain an electronic-grade acetone product. According to the refining method of the acetone, an electronic-grade acetone product suitable for semiconductor application scenes with higher requirements can be obtained; the electronic-grade acetone product is good in quality and high in purity, the content of aldehyde compounds and the content of evaporation residues in the acetone product are very low, and the electronic-grade acetone product can be suitable for semiconductor application scenes with higher requirements.

The invention provides a piperidone synthesis tail gas treatment method, which comprises: (1) carrying out first condensation on piperidone synthesis tail gas to obtain a first condensate and a first non-condensable gas; performing second condensation on the first non-condensable gas to obtain second condensate and second non-condensable gas; recovering the first condensate and the second condensate with acetone to obtain an acetone product; (2) the second non-condensable gas is subjected to acid pickling absorption, and an absorption rich solution and absorption tail gas are obtained; crystallizing the absorption rich solution to obtain an ammonium salt product; and (3) sequentially carrying out water washing, third condensation and adsorption on the absorption tail gas to obtain purified gas. The method provided by the invention can realize recovery of acetone and resource utilization of ammonium sulfate by-products, and has a wide application prospect.

The invention relates to the technical field of preparation of high-purity chemical reagents, in particular to a preparation method of high-purity acetone. The preparation method comprises the following steps: S1, in the presence of an oxidation reactant aqueous solution, carrying out first impurity removal treatment on an acetone crude product to obtain a first product material; and S2, in the presence of an alkali metal hydroxide solution, performing secondary impurity removal treatment on the first product material, and then performing post-treatment to obtain the high-purity acetone. The high-purity acetone prepared by the preparation method disclosed by the invention is high in purity, low in aldehydes and acid value, and capable of meeting the requirements of IC (Integrated Circuit) manufacturing on the purity of acetone, and meanwhile, the preparation method also has high acetone recovery rate.

Methods and systems for the production of acetone from cumene hydroperoxide (CHP) are disclosed. The methods and systems involve an acetone purification column configured to separate acetone from other components of the product / reactant stream. The acetone purification column is equipped with a side draw configured to transport a portion of the column contents to a caustic treatment vessel where the contents react with a dilute alkaline aqueous solution to remove aldehydes from the acetone product. The contents of the caustic treatment vessel are then transported back to the acetone purification column. The use of a separate caustic treatment vessel for aldehyde removal provides increased contact time between the acetone product and the alkaline solution, providing higher aldehyde removal.

The invention relates to a method for recovering methanol and acetone in oxide waste liquid and a method for treating methanol-to-ethylene waste liquid, which comprises the following steps of: feeding the oxide-containing waste liquid into a light component removal tower, obtaining acetaldehyde and light components at the tower top, feeding a material discharged from the tower bottom into a methanol-acetone azeotrope tower, and feeding methanol-acetone azeotrope obtained at the tower top into an acetone extractive distillation tower, performing extraction separation by taking water as an extracting agent to obtain an acetone product at the tower top and a methanol-water mixture at the tower bottom; the methanol-water mixture enters a methanol recovery tower to be separated to obtain a methanol product; part of the acetone product or the methanol product is circulated back to the methanol-acetone azeotrope tower, so that the ratio of materials in the methanol-acetone azeotrope tower is close to that of methanol and acetone azeotrope under the operation pressure. The content of organic oxides in the wastewater treated by the method provided by the invention is reduced to below 1wt%, various high-purity organic matter products are obtained while the oxide waste liquid is effectively treated, and the economic benefit is good.

The invention relates to a method for recovering methanol and acetone in an oxide waste liquid, a separation system and a methanol-to-olefin waste liquid treatment method, and the method comprises the following steps: sending the oxide-containing waste liquid to a light component removal tower, obtaining an acetaldehyde material at the tower top, sending a tower bottom discharge material into a methanol-acetone azeotrope tower, obtaining a methanol-acetone azeotrope at the tower top, sending a tower bottom discharge material into an oxide separation tower, an oxide-water mixture is obtained at the tower top, and water is discharged from the tower bottom; feeding the methanol-acetone azeotrope into an extractive distillation tower, and performing extraction separation by taking water as an extracting agent to obtain an acetone product at the tower top and a methanol-water mixture at the tower bottom; performing pervaporation dehydration refining on the methanol-water mixture to obtain a methanol product; the oxide-water mixture is subjected to pervaporation, dehydration and concentration, and the oxide mixture fuel is obtained. The content of oxides in the wastewater treated by the method provided by the invention can be reduced to below 1wt%, various organic matter products can be obtained while the oxide waste liquid is effectively treated, and the economic benefit is good.

The invention relates to a method for recovering methanol and acetone in an oxide waste liquid, a separation system and a methanol-to-ethylene waste liquid treatment method, and the method comprises the following steps: sending the oxide-containing waste liquid to a light component removal tower to obtain acetaldehyde and light components at the tower top, and sending a material discharged from the tower bottom to a methanol-acetone azeotrope tower, sending a methanol-acetone azeotrope obtained at the tower top to a methanol-acetone separation system, and separating to obtain an acetone product and a methanol product; a material discharged from the bottom of the methanol-acetone azeotrope tower enters a dehydrating tower, a concentrated oxide-water mixture is obtained from the top of the tower, and a material discharged from the bottom of the tower is treated wastewater; wherein in the oxide-containing waste liquid, the mass ratio of acetone to methanol is 0.5 to 3.0, and the operation pressure of the methanol-acetone azeotrope tower is 0.1 to 1.5 MPa. The content of organic oxides in the wastewater treated by the method provided by the invention is less than 1wt%, various high-purity organic matter products are obtained while the oxide waste liquid is effectively treated, and the economic benefit is good.

This invention discloses a method for purifying resorcinol, comprising: O) mixing m-diisopropylbenzene dihydroperoxide with an acid catalyst, performing a cracking reaction, and neutralizing to obtain a reaction liquid oil phase; A) sending the reaction liquid oil phase to a crude acetone tower for acetone separation, and further refining the separated acetone to obtain acetone product; C) sending the acetone-free component obtained in step A) to a solvent removal tower to remove the solvent, obtaining a crude resorcinol stream; D) passing the crude resorcinol stream through a resorcinol resin bed to remove aromatic olefin impurities; E) removing the heavy components from the stream obtained in step D) to obtain crude resorcinol, which is then passed through a refining tower to obtain the resorcinol product; F) sending the heavy components separated in step E) to a dealkylation tower, where some of the heavy components decompose to generate resorcinol, which is then crystallized to obtain the resorcinol product. This method can reduce resorcinol loss, improve resorcinol purity, and reduce energy consumption in the resorcinol purification process.