A kind of modification method and application of cation exchange resin catalyst

A cation exchange and catalyst technology, which is applied in the application of modified cation exchange resin catalysts and the field of modification of cation exchange resin catalysts, can solve the problems of low activity of modified resin catalysts, complex and cumbersome separation operations, and difficult disassembly of catalysts. Achieve the effect of low production cost, simple process and easy disassembly

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently built industrial plants use strong acidic cationic resin catalysts, but the raw material carbon tetraolefins used need to be purified, the separation operation is complex and cumbersome, and the energy consumption is high
[0006] In the prior art, the preparation method of modified resin catalyst is complicated, and solvent consumption is big, and the obtained modified resin catalyst activity is also not high, also can produce swelling (swelling rate > 55% in acetic acid) in its use process ), agglomeration, resulting in increased bed pressure drop, poor catalytic performance, etc. until it is difficult to disassemble when replacing the catalyst

Method used

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  • A kind of modification method and application of cation exchange resin catalyst

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Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 NKC-9 modified 1 # Preparation of:

[0046] Add 2.75 g of anhydrous aluminum trichloride and 200 ml of absolute ethanol into a 500 ml round bottom flask respectively, and stir to dissolve the anhydrous aluminum trichloride. Add 180 grams of NKC-9 resin and the ethanol solution dissolved with anhydrous aluminum trichloride into the reaction kettle respectively, install the reaction kettle (in a closed state to prevent the solvent from volatilizing), and heat it to 80°C under stirring. After 2 hours, cool down and stop stirring. After the temperature of the reactor is lowered to room temperature, the reactor is disassembled, the catalyst is poured out, dried in the air and baked at 80°C for 4 hours, and then taken out and placed in a desiccator for later use.

Embodiment 2

[0047] Embodiment 2 NKC-9 modified 2 # Preparation of:

[0048] Add 2.0 g of sulfamic acid and 200 ml of methanol into a 500 ml round bottom flask, stir to dissolve the sulfamic acid. Add 180 grams of NKC-9 resin and methanol solution dissolved with sulfamic acid into the reaction kettle respectively, install the reaction kettle (in a closed state to prevent the solvent from volatilizing), heat it to 80°C under stirring, and after 2 hours Cool down, stop stirring, disassemble the reactor after the temperature of the reactor drops to room temperature, pour out the catalyst, dry it in the air and bake it at 80°C for 4 hours, take it out and put it in a desiccator for later use.

Embodiment 3

[0049] Embodiment 3 NKC-9 modified 3 # Preparation of:

[0050] Add 2.75 grams of p-toluenesulfonic acid and 200 milliliters of methanol into a 500 milliliter round bottom flask, stir to dissolve the sulfamic acid. Add 200 grams of NKC-9 resin and methanol solution dissolved with p-toluenesulfonic acid into the reaction kettle respectively, install the reaction kettle (in a closed state to prevent the solvent from volatilizing), and stir at room temperature (25°C) 2 hours. Stop stirring and disassemble the reaction kettle, pour out the catalyst, dry it at 80°C for 4 hours, take it out and put it in a desiccator for later use.

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Abstract

The invention discloses a modification method for a cation exchange resin catalyst. The modification method comprises the steps: (1) dissolving an acidic compound in an alcoholic organic solvent, so as to prepare an alcoholic solution of the acidic compound; (2) subjecting the cation exchange resin catalyst to a reaction with the alcoholic solution of the acidic compound; and (3) drying the reaction product of the step (2). The invention further discloses a method for carrying out comprehensive utilization on an etherified C4 fraction through the modified cation exchange resin catalyst obtained by the method. The method comprises the following steps: (i) subjecting the etherified C4 fraction to a reaction with acetic acid in the presence of the catalyst, so as to obtain a crude sec-butyl acetate product containing acetic acid; (ii) subjecting water and the crude sec-butyl acetate product containing acetic acid to a hydrolysis reaction in the presence of the catalyst, and separating a mixture of sec-butyl acetate and sec-butanol from the mixture obtained from the reaction; and (iii) rectifying the mixture of sec-butyl acetate and sec-butanol, thereby obtaining sec-butyl acetate and sec-butanol products separately.

Description

technical field [0001] The invention relates to the field of petrochemical industry. Further, it relates to a modification method of a cation exchange resin catalyst, and the application of the modified cation exchange resin catalyst prepared by the modification method. Background technique [0002] With the changes in the pattern of petrochemical resources, the C4 fractions of ethylene plants and refineries are becoming more and more valuable, but the utilization of C4 fractions in my country is not sufficient at present, and the most utilized are isobutene and butadiene in C4 fractions. The C4 fraction of the refinery does not contain butadiene and can be directly etherified. The C4 fraction of the ethylene plant contains about 45% butadiene, and the butadiene needs to be extracted before the etherification reaction. At present, the technology for producing methyl tert-butyl ether (MTBE) is very mature. Every petrochemical enterprise has an etherification device, which pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/08C07C67/04C07C69/14C07C29/09C07C31/12
CPCB01J31/08B01J2231/49C07C29/095C07C67/04C07C69/14C07C31/12
Inventor 王定博郭敬杭张明森
Owner CHINA PETROLEUM & CHEM CORP
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