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Oxidized wax and preparation method thereof

A technology of wax oxidation and catalytic oxidation, which is applied in petrochemical modification, etc., can solve the problems of poor selectivity of target products, inability to realize directional oxidation, and long reaction time, so as to facilitate industrial production design, shorten oxidation reaction time, and reduce production cost effect

Active Publication Date: 2021-05-28
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of low catalyst activity, long reaction time, inability to achieve directional oxidation, poor selectivity of target products, darker color of oxidized wax products and low ester-acid ratio in the existing oxidized wax preparation process, and provide a A kind of oxidized wax and preparation method thereof, this method adopts iron-based catalyst and / or cobalt-based catalyst, and combines auxiliary agent and oxygen-containing gas to catalyze Fischer-Tropsch wax to react, realizes the directional oxidation of Fischer-Tropsch wax, and improves the oxidized wax Product color index and ester-acid ratio

Method used

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  • Oxidized wax and preparation method thereof
  • Oxidized wax and preparation method thereof
  • Oxidized wax and preparation method thereof

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preparation example Construction

[0024] The first aspect of the present invention provides a method for preparing oxidized wax, the method comprising: in the presence of a catalyst and an auxiliary agent, performing a catalytic oxidation reaction of molten Fischer-Tropsch wax with an oxygen-containing gas to obtain oxidized wax;

[0025] Wherein, the catalyst is an iron-based catalyst and / or a cobalt-based catalyst.

[0026] The inventors of the present invention have found that manganese-based catalysts are mainly used for the controllable shallow catalytic oxidation modification of existing waxes, which have low activity and poor selectivity of target products, and the obtained oxidized wax products have an ester-acid ratio of about 1:1, and the catalyst precipitates and deposits at the bottom of the reactor and cannot fully participate in the reaction; the catalyst-free oxidation modification of the existing wax cannot control the product distribution, and cannot achieve directional oxidation, and the slow ...

Embodiment approach

[0045] According to a particularly preferred embodiment of the present invention, a method for preparing oxidized wax, the method comprises: after heating and melting the Fischer-Tropsch wax, adding a catalyst, an auxiliary agent and an oxygen-containing gas for catalytic oxidation to obtain oxidized wax;

[0046] Wherein, the catalyst is iron stearate, the auxiliary agent is glacial acetic acid, and the oxygen content in the oxygen-containing gas is 21-50v%.

[0047] The second aspect of the present invention provides an oxidized wax prepared by the method provided in the first aspect.

[0048] In the present invention, under no special circumstances, the acid value represents the number of milligrams of potassium hydroxide required to neutralize 1g of chemical substances, and the unit is mg·KOH / g; the ester value (unit is mg·KOH / g)=saponification value-acid value, wherein, the saponification value represents the milligram number of potassium hydroxide consumed by the hydrol...

Embodiment 1-5

[0056] After gradually heating 100g of 70# Fischer-Tropsch wax to 120°C to melt it completely, add different masses of ferric stearate (see Table 1), 3g of glacial acetic acid and oxygen-containing gas with a gas flow rate of 50mL / min g (Oxygen content is 25v%) for catalytic oxidation, wherein the temperature of the first stage is 180°C for 1h, and the temperature of the second stage is 150°C for 6h to obtain oxidized waxes S1-S5.

[0057] Among them, the performance parameters of the acid value, saponification value, ester value and ester-acid ratio of the oxidized waxes S1-S5 are listed in Table 1; the colors of the oxidized waxes S1-S5 are similar, all of which are lighter and slightly yellowish.

[0058] Table 1

[0059]

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Abstract

The invention relates to the field of preparation of oxidized wax, in particular to oxidized wax and a preparation method thereof. The method comprises the following steps: in the presence of a catalyst and an auxiliary agent, molten Fischer-Tropsch wax and oxygen-containing gas are subjected to a catalytic oxidation reaction to obtain oxidized wax, wherein the catalyst is an iron-based catalyst and / or a cobalt-based catalyst. According to the method provided by the invention, the Fischer-Tropsch wax is subjected to oxidation reaction to realize directional oxidation, so that the product distribution of the oxidized wax product is controlled, the reaction product is performed towards the target of generating more esters, and the ester-acid ratio of the oxidized wax product is increased; meanwhile, the production cost is reduced, and industrial production design is facilitated.

Description

technical field [0001] The invention relates to the field of preparation of oxidized wax, in particular to an oxidized wax and a preparation method thereof. Background technique [0002] Before the wax raw material is oxidized, its acid value and esterification value are almost zero. The properties of the modified wax products have been significantly improved in terms of emulsification, oil solubility, lubricity and pigment dispersibility. [0003] The catalytic oxidation modification of wax is an oxidation process that is carried out under certain temperature and time conditions after adding a catalyst to the wax raw material and passing air into it. After adding the catalyst, the directional oxidation of wax can be realized, the production of fatty acid can be suppressed, the production of esters can be favored, and finally the oxidized wax product with high ester-acid ratio can be obtained. The catalyst for the wax oxidation reaction is mainly manganese-based catalysts....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/38
CPCC10G73/38
Inventor 黄浩邵光涛金梦刘素丽张安贵袁华石永杰冯光华陈久洲
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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