40 results about "Acetone synthesis" patented technology

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 0.3 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 0.3 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.

The invention discloses a process for preparing high-purity MIBK by utilizing industrial by-product waste liquid acetone. Including the reaction liquid that synthesizes MIBK from waste liquid acetone to obtain light components with a lower boiling point than acetone at the top of the light component removal tower, and obtain unreacted acetone at the top of the acetone recovery tower; obtain a boiling point lower than MIBK at the top of the process water tower / water azeotrope organic matter and MIBK / water azeotrope; low-boiling organic matter such as acetone and methanol from raw materials are obtained at the top of the dehydration tower; alcohol / water distillates are obtained at the top of the dealcoholization tower and A crude MIBK distillate is obtained; a light component with a boiling point lower than that of MIBK is obtained at the top of the MIBK refining tower and a MIBK product with a purity ≥ 99.5% is obtained from the side line. The technical process disclosed by the invention is simple, low in energy consumption, and low in production cost, and high-purity MIBK products can be obtained by using high-impurity waste liquid acetone, which has significant economic benefits.

The invention discloses a preparation method for a sulfuration palladium / alumina catalyst. The method comprises the following steps: preparing an acidic impregnating solution containing palladium and impregnating an alumina carrier in the impregnating solution containing palladium for a certain period of time; then adding a proper amount of a sodium alkyl xanthate solution drop by drop; and carrying out filtering, drying and roasting after completion of impregnation so as to obtain the sulfuration palladium / alumina catalyst. The method provided by the invention overcomes the disadvantage of mismatching between a hydrogenation function and a condensation dehydration function of conventional oxidized palladium / alumina catalysts for synthesis of methyl isobutyl ketone from acetone, and when used for synthesis of methyl isobutyl ketone from acetone, the prepared catalyst has superior reaction activity than catalysts used in conventional processes.

The invention discloses a catalyst for synthesis of 2,6-dimethyl-4-heptanone from acetone and a preparation method for the catalyst. The catalyst comprises an active ingredient Ni and a carrier ZrO12-MnO2; based on the total weight of the catalyst, the content of the active ingredient Ni is 1 to 10 weight percent, preferably 3 to 6 weight percent, the content of MnO2 is 1 to 20 weight percent, preferably 5 to 10 weight percent, and the balance is ZrO2. The catalyst disclosed by the invention is applied to a reaction for synthesis of the 2,6-dimethyl-4-heptanone from the acetone, and has the characteristics that conversion rate of the acetone serving as a raw material is high; the selectivity of the 2,6-dimethyl-4-heptanone serving as a product is high, that is the yield of the 2,6-dimethyl-4-heptanone serving as a target product is high.