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Cyclohexane oxidation byproduct treatment method

A treatment method and technology of cyclohexane, which is applied in the field of treatment of cyclohexane oxidation by-products, can solve problems such as insufficient utilization of cyclohexane oxidation by-products, and achieve the effects of avoiding crystallization, fully utilizing and reducing, and avoiding corrosion

Active Publication Date: 2020-07-07
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a treatment method for cyclohexane oxidation by-products to solve the problem of insufficient utilization of cyclohexane oxidation by-products in the prior art

Method used

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Examples

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Effect test

Embodiment 1

[0033] Put 100L of by-products from the process of cyclohexane oxidation to cyclohexanone and cyclohexanol (main components are ketones, ethers, alcohols and acidic organics) in the process of non-catalytic oxidation of cyclohexane into a 300L reactor and add it through a feed pump After 30L of sodium hydroxide solution with a concentration of 20wt% (the weight of sodium hydroxide accounts for 5.8% of the by-product of cyclohexane oxidation), control the temperature to 70℃, stir for 2h, after the reaction is completed, stand for 2h to separate , Removal of gas phase products by rectification at 0.1Mpa and 110°C to obtain by-products separated by alkaline washing. Then, the by-products and vacuum residue obtained after alkaline washing separation were mixed in a ratio of 1:50 and then added to the delayed coking reactor. The temperature in the heating furnace was controlled to 495°C, the reaction pressure was 0.2MPa, and the oil phase The mixture of vacuum residue and vacuum res...

Embodiment 2

[0035] The difference from Example 1 is that the ratio of the oil phase to the vacuum residue is 1:10.

Embodiment 3

[0037] The difference from Example 1 is that the ratio of the oil phase to the vacuum residue is 1:100.

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Abstract

The invention provides a cyclohexane oxidation byproduct treatment method, which comprises: S1, carrying out a reaction on a cyclohexane oxidation byproduct and an alkali solution, and separating to obtain an oil phase in the product; S2, mixing the oil phase with the heavy residual oil, and carrying out delayed coking reaction to obtain component oil gas and coke, wherein the cyclohexane oxidation by-product contains ketones, ethers, alcohols and acid organic matters. By adopting the treatment method provided by the invention, the problems that the utilization method of the cyclohexane oxidation by-product in the prior art can only realize the decrement treatment of the by-product and the utilization is insufficient are solved.

Description

Technical field [0001] The present invention relates to the field of petrochemical industry, and in particular to a method for treating by-products of cyclohexane oxidation. Background technique [0002] At present, when cyclohexane is used as raw material in the industry, when cyclohexanone and cyclohexanol are produced by liquid-phase oxidation without catalysis, 5% of by-products will be produced, and the distillation range is 150-700℃, which are ketones, ethers, alcohols and esters. It is a mixture of, acids, aldehydes, phenols and a small amount of hydrocarbon organics. The composition is extremely complex. It is a brown-black viscous liquid at room temperature with a strong pungent odor. [0003] At present, for the processing technology of this by-product, Chinese patent CN1131654A mentions a method. The oxidation by-product is firstly vacuum rectified to collect dimer and trimer ketone, and then use it as plasticizer and unsaturated resin for plastics. The crosslinking tou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G9/00C10G2/00
CPCC10G9/00C10G2/00Y02P20/10
Inventor 娄阳张元礼王超程光剑石鸣彦鄢红玉吕洁刘涛黄集钺王洪杰李志刚李国涛王红
Owner PETROCHINA CO LTD
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