6 results about "Acetone product" patented technology

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 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.

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.

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.