Method for simultaneous production of methyl ethyl ketone and cyclohexane

A technology of methyl ethyl ketone and cyclohexane, which is applied in the field of simultaneous production of methyl ethyl ketone and cyclohexane, can solve the problems of high construction cost, large floor area, and large production investment, and achieve high utilization efficiency and no potential safety hazards.

Inactive Publication Date: 2013-04-10
NANJING COLLEGE OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, there are not only disadvantages such as large production investment, large floor area, high construction cost, many personnel, and low utilization rate of energy. Therefore, this patent provides an in-situ utilization of hydrogen to simultaneously complete methyl ethyl ketone in the same reactor. And the production method of cyclohexane

Method used

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  • Method for simultaneous production of methyl ethyl ketone and cyclohexane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: preparation catalyst

[0035] Weigh Cu(NO 3 ) 2 ﹒ 3H 2 O, Ni(NO 3 ) 2 ﹒ 6H 2 O, Zn(NO 3 ) 2 ﹒ 6H 2 O and Al(NO 3 ) 3 ﹒ 9H 2 O and SiO 2 Choose at least one of the two to dissolve in water to form solution I with a concentration of 200~300g / L, and weigh Na 2 CO 3 Dissolve in water to make solution II with a concentration of 70~100g / L, add solution I dropwise to solution II at 50°C for 12 minutes, and control the final pH value to 7.0. After the dropwise addition, aged at 60° C. for 0.5 h, filtered, washed, and dried at 100° C. for 8 h to obtain a catalyst precursor. The precursor was calcined in a muffle furnace at 340°C for 4 hours in an air atmosphere, and pressed into pellets to obtain the coupled catalyst.

[0036] Cu(NO 3 ) 2 ﹒ 3H 2 O, Ni(NO 3 ) 2 ﹒ 6H 2 O, Zn(NO 3 ) 2 ﹒ 6H 2 O, Al(NO 3 ) 3 ﹒ 9H 2 O and SiO 2 The dosage ratio of at least one of the two is as follows:

[0037] (1) Ni(NO 3 ) 2 ﹒ 6H 2 O and Cu(NO ...

Embodiment 2

[0080] Accurately measure the close-packed coupling catalyst (the composition of the first-stage catalyst: the molar ratio of nickel to copper is 1:2, the molar ratio of copper to zinc is 1.5:1, alumina is the carrier, and the mass percentage of the carrier is 13.0%; the composition of the second-stage catalyst is : The molar ratio of nickel to copper is 2:1, the molar ratio of copper to zinc is 1.5:1, alumina is the carrier, and the mass percentage of the carrier is 13.0%) 30mL are respectively loaded into two-stage catalytic reactors (the first stage adopts tube heat exchange type reactor, the second stage uses an adiabatic reactor), after the catalyst is filled, carry out an airtight test, use soapy water to check for leaks until no bubbles come out, and use 5% H 2 -95%N 2 (Volume percent) The mixed gas is activated by temperature programming (reducing nickel and copper oxides to zero-valent or close to zero-valent nickel and copper), programmed temperature program: 15°C, 2...

Embodiment 3

[0082] Accurately measure the close-packed coupling catalyst respectively (the composition of the first-stage catalyst: the molar ratio of nickel to copper is 1:8, the molar ratio of copper to zinc is 3:1, alumina is the carrier, and the mass percentage of the carrier is 15.0%; the composition of the second-stage catalyst is : The molar ratio of nickel to copper is 5:1, the molar ratio of copper to zinc is 3.0:1, alumina is the carrier, and the mass percentage of the carrier is 15.0%) 30mL are respectively loaded into two-stage catalytic reactors (the first stage uses tube heat exchange type reactor, the second stage uses an adiabatic reactor), after the catalyst is filled, carry out an airtight test, use soapy water to check for leaks until no bubbles come out, and use 5% H 2 -95%N 2 (Volume percent) The mixed gas is activated by temperature programming (reducing nickel and copper oxides to zero-valent or close to zero-valent nickel and copper), programmed temperature program...

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Abstract

The invention relates to a method for a simultaneous production of methyl ethyl ketone and cyclohexane in the same reactor. The method is characterized by taking a mixture of sec-butyl alcohol and benzene (a mol ratio is controlled to be not lower than 4, preferably 4-10) as a raw material, vaporizing, treating by a two-stage catalytic reactor containing a nickel-copper catalyst, and rectifying and separating. Conditions of two stages of reactions are as follows: conditions of the first stage of reaction is as follows: reaction temperature is 150-250 DEG C, reaction pressure is not greater than 0.5MPa, the mol ratio of sec-butyl alcohol and benzene is not lower than 4, and the space velocity of the mixing material liquid is 0.5-2.5; and the conditions of the second stage of reaction is as follows: reaction temperature is 180-250 DEG C, and reaction pressure is not greater than 1.0MPa; and yields are respectively as follows: the yield of the cyclohexane is not lower than 98.5%, and the yield of ethyl ketone is not lower than 97.0%.

Description

Technical field: [0001] The present invention relates to a kind of method of producing methyl ethyl ketone and cyclohexane simultaneously, and this method is also applicable to similar reaction etc. with this. technical background: [0002] Methyl ethyl ketone (MEK for short), also known as methyl ethyl ketone and 2-butanone, is an excellent organic solvent with excellent solubility and drying characteristics. The advantages of lower, less toxic, etc., for various natural resins (such as rosin, camphor, etc.), cellulose esters (such as nitrocellulose, ethyl cellulose, cellulose acetate), synthetic resins (such as alkyd resin, Phenolic resin, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, vanillone-indene resin, p-chlorobenzenesulfonamide resin, acrylic resin, polystyrene resin, chlorinated rubber , polyurethane resin, etc.) have good solubility properties. In addition, methyl ethyl ketone can be miscible with variou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C49/10C07C45/51C07C13/18C07C5/10B01J23/80
Inventor 丁志平吴永忠王世娟李玉龙胡瑾
Owner NANJING COLLEGE OF CHEM TECH
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