Hydrogenation method of C4 unsaturated hydrocarbon

A technology of unsaturated and hydrogenation catalysts, which is applied in the field of hydrogenation of C4 unsaturated hydrocarbons, can solve the problems of reduced utilization of catalyst active components, decreased catalyst activity, increased production costs, etc., to achieve long-term stable operation and reduce Production amount and the effect of improving hydrogenation activity

Active Publication Date: 2019-03-08
兰州金润宏成新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the thermal stability of the catalyst is not good, the first high-temperature reduction will cause the utilization rate of the active components of the catalyst to decrease, and the frequent high-temperature regeneration treatment will cause the unrecoverable activity of the catalyst to decrease, so the replacement of the catalyst will increase the production cost of the manufacturer

Method used

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  • Hydrogenation method of C4 unsaturated hydrocarbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of silica-alumina composition 1

[0027] 1. Preparation of nickel-containing magnesium aluminate LaMgAl 11 o 19 The process is as follows:

[0028] Take 7.8 grams of basic magnesium carbonate, 25 grams of lanthanum carbonate and 70.5 grams of aluminum hydroxide, mix well, add deionized water to form a highly dispersed suspension, then add 8 grams of nickel nitrate, spray dry, and dry at 140 ° C for 5 hours. and placed in an air atmosphere at 1300° C. for 4 hours and then ball milled for 18 hours to obtain nickel-containing magnesium lanthanum aluminate powder. The nickel-containing magnesium-lanthanum aluminate powder is added with water, and the highly dispersed nickel-containing magnesium-lanthanum aluminate slurry is obtained after ultrasonic vibration.

[0029] 2. Preparation of silica-alumina composition

[0030] Take 140g of pseudo-boehmite and 22g of scallop powder, mix evenly, add dilute nitric acid, then add 20g of sodium polyacrylate nitric...

Embodiment 2

[0034] (1) Preparation of silica-alumina composition 2

[0035] The preparation of nickel-containing magnesium lanthanum aluminate is the same as in Example 1, the preparation of the silica-alumina composition is the same as in Example 1, and 70% of pseudo-boehmite is mixed evenly with celadon powder, and the pore-enlarging agent 1 is polyvinyl alcohol. The added amount accounts for 22% of the mass of the added alumina, and the added amount of the pore expander 2 chitosan accounts for 5% of the added mass of the alumina and silicon oxide. The silica-alumina composition contains 4.9wt% silica and 6.5wt% nickel-containing magnesium lanthanum aluminate.

[0036] (2) Preparation of catalyst

[0037] The preparation method of the catalyst was the same as that in Example 1. The polyacrylic acid and the silica-alumina composition powder were mixed uniformly in a ratio of 1.8:1 by volume. The composition of the catalyst was shown in Table 1.

Embodiment 3

[0039] (1) Preparation of silica-alumina composition 3

[0040] The preparation of nickel-containing magnesium lanthanum aluminate is the same as in Example 1, the preparation of the silica-alumina composition is the same as in Example 1, and 65% of pseudo-boehmite is mixed evenly with squat powder, and the pore-enlarging agent 1 is polyacrylate The added amount accounts for 17% of the mass of the added alumina, and the added amount of the pore-enlarging agent 2 methylcellulose accounts for 3.7% of the added mass of the alumina and silicon oxide. The silica-alumina composition contained 6.2 wt% of silica and 7.8 wt% of nickel-containing magnesium lanthanum aluminate.

[0041] (2) Preparation of catalyst

[0042] The preparation method of catalyst 3 was the same as that in Example 1. Sodium polyacrylate was added to dilute nitric acid and mixed evenly with the silica-alumina composition powder at a volume ratio of 1.5:1. The composition of the catalyst was shown in Table 1.

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Abstract

The invention relates to a hydrogenation method of C4 unsaturated hydrocarbon. According to the method, by the aid of a fixed bed reactor, a nickel saturated hydrogenation catalyst is reduced outsidea hydrogenation reactor at the temperature of 350-500 DEG C, air is led in to passivate the catalyst, the passivated catalyst is reduced in the reactor by hydrogen at the temperature of 120-200 DEG C,the C4 unsaturated hydrocarbon is added, alkyne and diolefin in the C4 unsaturated hydrocarbon are hydrogenated into corresponding alkane, the nickel saturated hydrogenation catalyst comprises activecomponents and silicon oxide-aluminum oxide composition, and the active components include molybdenum, nickel , cobalt and magnesium. Reaction process conditions include that inlet temperature of thereactor is 30-55 DEG C, reaction pressure is 1.0-4.5MPa, liquid volume per hour is 1.5-4.5h<-1>, and the volume ratio of hydrogen to oil is (120-450):1. According to the hydrogenation method of theC4 unsaturated hydrocarbon, the catalyst is good in hydrogenation activity, good in gelatine and water resistance and high in sulfur resistance.

Description

technical field [0001] The present invention relates to a C 4 The hydrogenation method of unsaturated hydrocarbon, industrial C 4 Alkynes and diolefins in the distillate are hydrogenated to corresponding alkanes. Background technique [0002] C 4 and C 5 Unsaturated hydrocarbons contain more diolefins. At a certain reaction temperature, in addition to their own polymerization, the diolefins will also react with other hydrocarbons to form colloidal precursors such as colloids. Moreover, olefins are easy to polymerize, and monoolefins are easy to hydrogenate and saturate. While hydrogenation removes diolefins in raw oil, it can avoid or reduce olefin polymerization reaction. [0003] 1.3-butadiene is an important raw material for synthetic rubber. The waste gas from rubber factories contains about 40v% of 1.3-butadiene and about 10v% of alkynes. Most of the catalysts for hydrogen removal are palladium-platinum-silver / α-alumina, followed by non-precious metal catalysts re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/36B01J23/887
CPCB01J23/002B01J23/8872B01J23/8873B01J2523/00C10G45/36C10G2300/1092B01J2523/22B01J2523/31B01J2523/3706B01J2523/41B01J2523/68B01J2523/845B01J2523/847B01J2523/27B01J2523/15
Inventor 肖真勇
Owner 兰州金润宏成新材料科技有限公司
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