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Polystyrene sulfonic acid resin catalyst as well as preparation method and application of polystyrene sulfonic acid resin catalyst

A polystyrene sulfonic acid and catalyst technology, applied in catalyst activation/preparation, catalyst, catalytic reaction and other directions, can solve the problems of low raw material concentration, thermal deactivation of catalyst, insufficient thermal conductivity, etc.

Active Publication Date: 2017-12-12
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Therefore, it is necessary to find a new type of catalyst that can efficiently catalyze the dehydration of tert-butanol and oligomerization of isobutene to solve the problem of thermal deactivation of the catalyst caused by insufficient thermal conductivity of the catalyst and the occurrence of raw materials in the existing dehydration of tert-butanol and oligomerization of isobutene. The disadvantages of low concentration and low product selectivity can improve the service life of the catalyst and product selectivity, and achieve the purpose of reducing production costs

Method used

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  • Polystyrene sulfonic acid resin catalyst as well as preparation method and application of polystyrene sulfonic acid resin catalyst
  • Polystyrene sulfonic acid resin catalyst as well as preparation method and application of polystyrene sulfonic acid resin catalyst
  • Polystyrene sulfonic acid resin catalyst as well as preparation method and application of polystyrene sulfonic acid resin catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Preparation of Catalyst 1:

[0105] (1) Add 323L of derusted nickel foam into the 1 cubic meter stirred tank after nitrogen replacement, the minimum dimension of the foam nickel is 0.1mm, and the maximum dimension is 0.3mm. Then, 350L of pentaerythritol monooleate was added into the stirred tank, and stirred at room temperature for 2 hours under the protection of nitrogen. Then, under the protection of nitrogen, the liquid in the reaction kettle is leached out through the lower outlet with a filter screen, and the pentaerythritol monooleate on the surface of the foamed nickel powder is dried under a nitrogen atmosphere for subsequent use.

[0106] (2) Add the aqueous solution (1.5wt%) of the polyvinyl alcohol of 1920kg, the isopropanol of 288kg, the divinylbenzene (density 0.93kg / L) of 23kg, 68kg The styrene (density 0.90kg / L), the dibenzoyl peroxide (density 1.33kg / L) of 1.8kg and the 50L nickel foam that (1) step handles well. Under reflux condensation, raise the re...

Embodiment 2-4

[0111] Preparation of Catalysts 2-4

[0112] Except changing the ratio of nickel foam and polymer monomer (styrene and divinylbenzene), all adopt the same method as that prepared in Example 1, the nickel foam charging capacity is 50L, respectively obtains catalyst 2-4, sees for details Table 1.

[0113] Table 1 Catalysts 2-4

[0114]

Embodiment 5-7

[0116] Preparation of Catalyst 5:

[0117] Except for improving according to the following conditions, other methods in the preparation of catalyst 5 are the same as in Example 1: changing the metal to 50L minimum dimension size is 10 μm, fiber cobalt with maximum dimension size 30 μm, dibenzoyl peroxide, divinylbenzene and The volume ratio of the total volume of styrene to metal is 10:1, the mass ratio of divinylbenzene to styrene is 1:10, the ratio of benzoyl peroxide to the total mass of polymerized monomers is 1:100, isopropanol The mass ratio of the polyvinyl alcohol to the polyvinyl alcohol aqueous solution (1.5wt%) is 10:1, and the mass ratio of the total mass of polymerized monomers to the polyvinyl alcohol aqueous solution is 1:30. In the obtained catalyst 5, the metal covered by polystyrene sulfonic acid resin accounts for 50% of the total volume of the metal, and the uncoated metal accounts for 50% of the total volume of the metal. The average particle diameter of t...

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Abstract

The invention relates to a polystyrene sulfonic acid resin catalyst as well as a preparation method and application of the polystyrene sulfonic acid resin catalyst to respective tertiary butanol dehydration and isobutylene oligomerization to co-produce isobutylene and diisobutylene. The catalyst comprises polystyrene sulfonic acid resin, metal and metal sulfate; the metal comprises two parts, namely metal coated with the polystyrene sulfonic acid resin and metal not coated with the polystyrene sulfonic acid resin; and the metal sulfate is converted from an exposed surface of the metal not coated with the polystyrene sulfonic acid resin in the catalyst. When the catalyst is respectively used for tertiary butanol dehydration and isobutylene oligomerization, due to the high heat conductivity of the catalyst, the energy required by tertiary butanol dehydration is compensated after the two reactions are coupled, and the hot spot temperature of a bed layer for isobutylene oligomerization is greatly reduced; during reaction, the per-pass conversion rate of TBA dehydration can reach up to 40% or above, and the selectivity of isobutylene can reach up to 99% or above; and meanwhile, no sustained release preparations are needed to be added when isobutylene oligomerization is catalyzed, and even if isobutylene with the concentration being larger than 80wt% is used as a raw material, the selectivity of DIB is still 80% or above, and the per-pass conversion rate is 90% or above.

Description

technical field [0001] The invention relates to a polystyrene sulfonic acid resin catalyst and a preparation method thereof, and the use of the catalyst in separately catalyzing the dehydration of tert-butanol and the oligomerization of isobutene to co-produce isobutene and diisobutene. Background technique [0002] Isobutylene (IB), especially high-purity IB, has a wide range of downstream applications, involving many fields such as organic chemical industry, synthetic resin, and synthetic rubber. [0003] Dehydration of tert-butanol (TBA) is currently one of the mainstream methods for producing high-purity isobutene. The dehydration of TBA is an endothermic reaction with an endothermic heat of 26kJ / mol. The existing TBA dehydration generally adopts two processes of reactive distillation and fixed bed. The reactive distillation process needs to continuously vaporize the TBA in the tower kettle to make it rise to the catalyst bed. Under the reaction pressure, the IB genera...

Claims

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Application Information

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IPC IPC(8): B01J31/28C07C11/09C07C1/24C07C11/02C07C2/26
CPCB01J31/28C07C1/24C07C2/26C07C2531/28B01J2231/20C07C11/09C07C11/02C07C69/00C07C69/14B01J31/06B01J37/0225B01J37/0219B01J37/0228B01J37/12B01J37/0201B01J2208/065B01J2208/00539
Inventor 袁帅黄少峰何岩黎源王中华吕艳红宋伟锋董龙跃刘振峰于学丽
Owner WANHUA CHEM GRP CO LTD
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