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Method for producing butylenes-1 with hydroisomerization of butylenes-2

A technology of hydroisomerization and butene, which is applied in the field of butene-2 ​​hydroisomerization to butene-1, can solve the problems of reducing the hydrogenation rate of olefins, inconvenient processing and utilization, and polluting products, so as to improve the isotropic Structural activity, good pore size distribution, and low olefin hydrogenation rate

Active Publication Date: 2013-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, in order to reduce the excessive hydrogenation of olefins in the process of hydroisomerization, U.S. Patent USP3531545 proposes that a sulfur-containing compound can be added to the C4 material to reduce the hydrogenation rate of olefins. This method is not only cumbersome but also pollutes the product. Processing and utilization bring a lot of inconvenience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing 300 grams of pseudo-boehmite, 150 grams of δ-alumina, 9 grams of scallop powder, mix, then add 25 grams of polyvinyl alcohol-containing solution (mass concentration is 5%), and concentration is 4.0 grams of 68% nitric acid , 1.5 grams of potassium nitrate, 2 grams of magnesium nitrate, 1.0 grams of lanthanum nitrate, 360 ml of aqueous solution, extruded into a clover-shaped carrier with a diameter of 2.5 mm, dried at 120°C for 4 hours and then roasted at 750°C for 4 hours to obtain carrier Z1 , the composition of the carrier is shown in Table 1, and the surface properties of the carrier are shown in Table 2. The carrier was impregnated in the same amount of nickel nitrate impregnating solution with a metal nickel content of 14%, dried at 60°C for 8 hours, and calcined at 450°C for 4 hours to obtain Ni-based catalyst 1, so that the final Ni content was 10.0% of the weight of the carrier alumina. %. The catalyst composition is shown in Table 3, and the c...

Embodiment 2

[0017] Carrier Z1 was used, and the preparation method of the carrier was the same as in Example 1, and the composition of the carrier was shown in Table 1. With the same operating steps and conditions of Example 1, just change the nickel solution to be a nickel-ammonia complex solution (nickel carbonate: ammonium carbonate: ammoniacal liquor=1.0: 1.0: 1.0) with a metal nickel content of 12.0%, and add nitric acid in the dipping solution 30.0 grams of silver was used to prepare Ni-based catalyst 2, so that the final Ni content was 20.0% of the carrier weight. The catalyst composition is shown in Table 3, and the content of each component is based on the weight of the carrier.

Embodiment 3

[0019]Take by weighing 300 grams of pseudo-boehmite, 45 grams of diatomaceous earth, and 9 grams of asparagus powder, mix, then add 25 grams of polyvinyl alcohol solution (mass concentration is 5%), and the concentration is 4.0 grams of 68% nitric acid, 1.8 grams of phosphoric acid with a concentration of 85%, 12.0 grams of potassium nitrate, 40.0 grams of zirconium nitrate, 3.0 grams of cerium nitrate, 360 milliliters of aqueous solution, extruded into a clover carrier with a diameter of 2.5 mm, wet strips dried at 50 ° C for 24 hours and then dried at 750 ° C Calcined for 4 hours, the carrier Z2 was obtained. The composition of the carrier is shown in Table 1, and the surface properties of the carrier are shown in Table 2. Mix 3.0 grams of silver nitrate with 50 grams of nickel nitrate solution with a metal nickel content of 14% to prepare an impregnation solution. The carrier and the impregnating solution were impregnated in equal amounts to obtain Ni-based catalyst 3.

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PUM

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Abstract

The invention relates to a method used for preparing butylene-1 by the hydroisomerization of butylene-2. The method mainly solves the technical problems in the prior art that the equilibrium conversion of the butylene-2 and double-bond butylene-1 is low; the olefin hydrogenation ratio is high; and the space velocity is low. The invention solves the problems well by the technical proposal which comprises the steps as follows: a material stream which is rich in butylene-2 component after separating the butylene-1 from etherified C4 and hydrogen are used as raw materials; under the conditions that the reaction temperature is 45 DEG C to 105 DEG C, the reaction pressure is 0.6-1.6MPa, the raw material space velocity of C4 is 1.5-60 hours <-1>, and the bulk proportion of hydrogen / hydrocarbon is 10<-5>-1:1, the raw materials are contacted with catalysts to take reaction and ensure that the component of the butylene-1 in the raw materials is close to or reaches the equilibrium composition, wherein, the applied catalysts essentially comprise 5.0 percent to 40.0 percent of metallic nickel and oxide thereof by weight percentage. The invention can be used in the industrial production for cracking or preparing the butylene-1 by the component of refinery C4 rich in the butylene-2.

Description

technical field [0001] The invention relates to a method for preparing butene-1 through hydroisomerization of butene-2. Background technique [0002] Butene-1 is mainly used as a comonomer in linear low-density polyethylene (LLDPE), and with the growth of existing LLDPE producers, the supply and demand of butene-1 tend to be tight. The shortage of butene-1 may also affect the large-scale petrochemical complexes being built in my country. At present, high-purity butene-1 mainly comes from the C4 fraction of refineries or ethylene by-product separation units. The remaining C4 fraction after separation of butene-1 mainly includes a small amount of isobutane, a small amount of n-butane, trans-butene-2 ​​and cis-butene-2. At present, the remaining C4 fraction is mainly used as fuel, and the comprehensive utilization rate is low. The isomers of n-butene (trans-butene-2, cis-butene-2, butene-1) can be transformed into each other under certain conditions, and the higher the tempe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/08C07C5/25B01J23/83B01J23/89B01J27/185
Inventor 刘仲能王建强吴征侯闽渤
Owner CHINA PETROLEUM & CHEM CORP
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