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A production method of isopropyl acetate

A technology of isopropyl acetate and acetic acid is applied in the field of producing carboxylate compounds, which can solve the problems of insufficient propylene production capacity, high propylene price, enlarged propylene gap, etc., to eliminate dependence, inhibit the production of butene, The effect of reducing the production of ethylene

Inactive Publication Date: 2017-06-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above processes for the synthesis of isopropyl acetate by direct esterification are all based on pure propylene, and the production capacity of propylene in my country is seriously insufficient, resulting in high prices of propylene; especially in recent years, with the impact of steam cracking, the main source of propylene With the adjustment of raw materials from naphtha to low-carbon hydrocarbons, the gap of propylene continues to increase; at the same time, a large number of low-carbon hydrocarbon resources at home and abroad, especially propane, are more expected to realize high-value utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of catalytic dehydrogenation catalyst

[0036] The SBA-15 mesoporous molecular sieve was prepared by the hydrothermal synthesis method as the carrier, and the dehydrogenation catalyst was prepared by the sequential impregnation method. First, the SBA-15 carrier was immersed in an ethanol solution of tin dichloride for 6 hours, then dried at 60°C, and calcined at 500°C for 8 hours to obtain Sn / SBA-15. Then, the Sn / SBA-15 was immersed in a certain amount of chlorine. The mixed aqueous solution of platinic acid and magnesium nitrate was dried at 110°C for 5h, and calcined at 500°C for 8h to obtain a PtSnMg / SBA-15 catalyst with a component content of 0.5% Pt, 1.1% Sn and 0.5% Mg.

[0037] Preparation of addition esterification catalyst

[0038] It adopts high-temperature modified H-type macroporous acidic styrene cationic resin catalyst. The basic grade of cationic resin is NKC-9. The high temperature resistance treatment process is as follows: put the resin in a re...

Embodiment 2

[0043] Preparation of catalytic dehydrogenation catalyst

[0044] Take γ-Al 2 O 3 As the carrier, the platinum-based dehydrogenation catalyst is prepared by the sequential impregnation method. First, a certain amount of zinc nitrate and tin dichloride are dissolved in absolute ethanol to make a solution, the carrier Al 2 O 3 After being immersed for 12h, rotary evaporation to dryness, drying at 120℃, baking at 580℃ for 4h to obtain SnZn / Al 2 O 3 ; Afterwards, using a similar method, and then impregnated with a certain amount of chloroplatinic acid solution, dried and roasted to obtain PtSnZn / γ-Al 2 O 3 The catalyst, the component content is Pt0.5%, Sn0.9%, Zn0.9%.

[0045] Preparation of addition esterification catalyst

[0046] It adopts high-temperature-resistant modified H-type macroporous acidic styrene cationic resin catalyst, the basic grade is DA-340. The high temperature resistant treatment of the catalyst is the same as the treatment process of NKC-9 in Example 1.

[0047] P...

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PUM

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Abstract

A production method of isopropyl acetate is provided. The method includes steps of (1) subjecting a gas material containing propane to a dehydrogenation reaction under action of a dehydrogenation catalyst to obtain a propylene-containing first product, and (2) subjecting the propylene-containing first product and acetic acid to non-contact heat exchanging, pressurizing, and performing an addition reaction under action of an addition catalyst without the need of heating to obtain the isopropyl acetate. According to the method, sources of the synthetic raw materials are enriched, a dehydrogenation product separation process is avoided, and the process cost is reduced.

Description

Technical field [0001] The present invention relates to a method for producing carboxylic acid ester compounds, and more specifically to a method for producing isopropyl acetate. Background technique [0002] Isopropyl acetate is an important carboxylic acid ester chemical product. It has a fruity fragrance and excellent alkali resistance. It is widely used as an organic solvent. It is ethyl cellulose, nitrocellulose, polystyrene, and methacrylic acid. It is a good solvent for many synthetic resins such as ester resins, and also a good solvent for kauri, abaca gum, rosin oil and other natural resins. It is also commonly used as a drug extractant, paint solvent, printing ink solvent, dehydrating agent, extractant and Fragrance components. The solvent performance of isopropyl acetate is very good. It is miscible with water and organic solvents. It is called a universal solvent. Its boiling point is 88℃ and its volatility is between ethyl acetate and butyl acetate. It can also rep...

Claims

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Application Information

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IPC IPC(8): C07C67/04C07C69/14B01J29/03B01J31/10B01J23/62
CPCC07C67/04B01J23/626B01J29/0325B01J31/10B01J2229/186B01J2231/49C07C5/333C07C2523/62C07C2529/03C07C11/06C07C69/14
Inventor 郭敬杭王定博张明
Owner CHINA PETROLEUM & CHEM CORP
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