A process for diacetone alcohol production in which a long-term operation is possible. The process comprises producing diacetone alcohol from acetone in the presence of a solid basic catalyst comprising at least (i) a metal hydroxide selected among the hydroxides of alkali metals and the hydroxides of alkaline earth metals and (ii) a binder, and is characterized by using as the solid basic catalyst one in which the volume of pores having a diameter of 0.01 to 1 μm is 1.8 ml/g or larger.

Process for producing diacetone alcohol

The invention relates to a method for producing methyl isobutyl ketone (MIBK) by using acetone (AC) An isopropyl alcohol (IPA) removing tower and a wastewater tower are added on the basis of the prior art; when the content of IPA in recovered AC is an arbitrary value in the range of 03 to 3 percent, the recovered AC is fed into the IPA removing tower to remove the IPA; when the content of the IPA in the recovered AC is less than 03 percent and is not increased any more, the recovered AC is directly fed into a reaction system; and part of oil phases of a phase separator on the top of an MIBK dehydrating tower and a product on the top of the wastewater tower are fed into the IPA removing tower to recover the AC and the MIBK The aim can be fulfilled only by increasing less investment, the smooth operation of a production device is facilitated, the recovery rate of the AC and the yield of the MIBK are improved, and the consumption of the AC and energy is reduced, so that the production cost of the product is reduced, and the competitiveness of the product and the economic benefit of enterprises are improved

Device and method for producing methyl isobutyl ketone (MIBK) by using acetone (AC)

The invention provides a production process of methyl isobutyl ketone. The production process includes the following steps that a, hydrogen is conveyed into a water mist catcher for water removal; b, hydrogen and acetone are mixed and conveyed into a reactor to react, an adopted catalyst is strong acid positive ion exchange resin treated through palladium acetate, a reaction product is subjected to water removal again through hydrogen obtained after condensation separation and reused in the reactor for the reaction; c, alkali is added to a condensation product solution; d, the product solution to which alkali is added enters an acetone light-component tower to be separated, a solution produced from the bottom of the tower enters an acetone recovery tower for rectification, negative pressure operation is conducted in the acetone recovery tower, acetone produced from the top of the tower is reused in a fixed bed reactor, coarse MIBK produced from the bottom of the tower enters a phase separator; e, the coarse MIBK enters an MIBK light-component tower for rectification, heavy components produced from the bottom of the tower enter a finished MIBK tower for rectification, and finished MIBK is produced from the lateral line of the finished MIBK tower. Thus, energy utilization is greatly reduced, and meanwhile safe and efficient production can be facilitated while the utilization rate of original raw materials is guaranteed.

Production process of methyl isobutyl ketone

The present invention relates to a separation method for a ketone hydrogenation reaction product, and specifically to a simplified separation method for a methyl isobutyl ketone catalysis hydrogenation reaction product According to the separation method, a reaction product of ketone catalysis hydrogenation is separated through a gas-liquid separator, wherein a gas phase is cycled to a reactor, and a liquid phase is conveyed to a feeding plate of a distillation tower; a material containing water and ketone is recovered from the top of the distillation tower, and then is separated through an oil-water separator, wherein an oil phase is cycled to a raw material tank; an alcohol product is recovered from side stream of the distillation tower; and an alcohol-containing heavy component is recovered from the distillation tow kettle, and is provided for modulating oil products The separation method of the present invention has the following advantages that: the target product has high purity, a process is short, investment is low, and energy consumption is low

Separation method for ketone hydrogenation reaction product

PROBLEM TO BE SOLVED: To provide a production process for methyl isobutyl ketone (MIBK) and methylisobutylcarbinol(MIBC) that can prolong the life of the catalyst, increase the recovery of acetone and reduce the amount of organic compounds in the liquid waste. SOLUTION: This MIBK and/or MIBC production process comprises the step (1) in which acetone is condensed in the presence of a basic solid catalyst to produce the reaction mixture containing diacetone alcohol (DAA); the step (2) in which the reaction mixture formed in the step (1) and the acetone- containing fraction recovered in the step 5 are distilled to separate acetone and recover DAA simultaneously; the step 3 in which the DAA recovered in the step 2 is dehydrated and hydrogenated to produce the reaction mixture containing MIBK and KIBC; the step 4 in which the reaction mixture prepared in the step 3 is distilled to recover MIBK and/or MIBC; and the step 5 in which an alkaline solution is added to the water phase formed in the step 2 as a by-product and they are distilled to recover the acetone-containing fraction.

Production of methyl isobutyl ketone and/or methyl isobutyl carbinol

PROBLEM TO BE SOLVED: To improve recovery efficiency by controlling the concentration of a coexisting component in a crystallizing solution system to a specific value and crystallizing an objective material in the case of separating or purifying the objective material crystal from a mixed solution by crystallization at a higher temp. than the crystallization tamp. of a crystalline material to be separated or purified. SOLUTION: At the time of isolating and purifying resorcinol from the mixed solution obtained by the oxidation of diisopropylbenzene and containing the coexisting component, which is phase separated at the higher temp. than the crystallization temp. of resorcinol, by the crystallization, the objective material is crystallized by controlling the concentration of the coexisting component in the crystallizing solution system to <=1.5wt.%. A device for crystallizing in this way is constituted so as to add a distillate, an adjusting liquid and toluene into a crystallization vessel 1 with a jacket, to which a stirring blade 2 and a condenser 3 are attached, and after that, to pass a hot water in the jacket. And gaseous N2 is blown from a N2 blowing pipe 6 to entrain toluene/water in a vapor state and the toluene/water is condensed and stored in a liquid/liquid separating cylinder 5 to remove the separated water.

Norio Ono

Papers

Production of methyl isobutyl ketone and/or methyl isobutyl carbinol

Method for separating or purifying material from mixed solution by crystallization