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A catalyst for improving the synthetic conversion rate of dioctyl phthalate plasticizer

A technology of dioctyl phthalate and plasticizer, which is applied in the field of new functional materials, can solve the problems of expensive synthetic raw materials, low reaction conversion rate, and poor product quality, and achieve strong catalytic activation performance and high dosage The effect of less and more channels

Active Publication Date: 2020-05-15
广东远承化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the synthesis and production of dioctyl phthalate is to use phthalic anhydride and 2-ethylhexanol to synthesize through two-step esterification reaction, wherein the reaction of monoester is relatively fast, while the reaction of synthesizing diester from monoester is very slow. At present, acid is widely used as a catalyst, which has a large amount of three wastes and side reactions, resulting in low conversion rate and poor product quality. However, other non-acidic catalysts are still not very targeted, and the reaction conversion rate is low, resulting in expensive synthetic raw materials. , and the waste is huge

Method used

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  • A catalyst for improving the synthetic conversion rate of dioctyl phthalate plasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of catalyst that improves the synthetic conversion ratio of dioctyl phthalate plasticizer, preparation method comprises the following steps:

[0021] (1) Weigh 9.5 grams of cobalt chloride hexahydrate and 0.5 grams of ethylenediaminetetraacetic acid into a beaker, add 70 milliliters of sodium hydroxide solution into the beaker, stir for 15 minutes by magnetic force, and then add 1.8 grams of four Ferric oxide magnetic powder and 1.0 g of sodium borate were stirred and mixed for 25 minutes under heating in a water bath at 55°C, then the stirred mixture was poured into a three-necked flask, nitrogen gas was introduced, 4.0 ml of polyethylene glycol was added dropwise, and the temperature was raised to 75 °C, use boric acid solution to adjust the pH value of the system between 9.4-9.7, and stir for 50 minutes;

[0022] (2) After the reaction, cool down to 35°C, use acetone and ethanol to perform ultrasonic cleaning respectively, and heat and evaporate the obtained f...

Embodiment 2

[0030] A kind of catalyst that improves the synthetic conversion ratio of dioctyl phthalate plasticizer, preparation method comprises the following steps:

[0031] (1) Weigh 9.6 grams of cobalt chloride hexahydrate and 0.55 grams of ethylenediaminetetraacetic acid into a beaker, add 75 milliliters of sodium hydroxide solution into the beaker, stir magnetically for 18 minutes, and then add 1.9 grams of tetrahydrochloride to the beaker Ferroferric oxide magnetic powder and 1.1 g of sodium borate were stirred and mixed for 30 minutes under heating in a water bath at 58° C., then the stirred mixture was poured into a three-necked flask, nitrogen gas was introduced, 4.2 ml of polyethylene glycol was added dropwise, and the temperature was raised to 80 °C, use boric acid solution to adjust the pH value of the system between 9.4-9.7, and stir for 55 minutes;

[0032] (2) After the reaction, cool down to 38°C, and use acetone and ethanol to perform ultrasonic cleaning respectively, an...

Embodiment 3

[0040] A kind of catalyst that improves the synthetic conversion ratio of dioctyl phthalate plasticizer, preparation method comprises the following steps:

[0041] (1) Weigh 9.8 grams of cobalt chloride hexahydrate and 0.6 grams of ethylenediaminetetraacetic acid, add them into a beaker, add 80 milliliters of sodium hydroxide solution into the beaker, stir magnetically for 20 minutes, and then add 2.0 grams of four Ferric oxide magnetic powder and 1.2 grams of sodium borate were stirred and mixed for 35 minutes under heating in a water bath at 60°C, then the stirred mixture was poured into a three-necked flask, nitrogen gas was introduced, 4.5 milliliters of polyethylene glycol was added dropwise, and the temperature was raised to 85 °C, use boric acid solution to adjust the pH value of the system between 9.4-9.7, and stir for 60 minutes;

[0042] (2) After the reaction, cool down to 40°C, use acetone and ethanol to perform ultrasonic cleaning respectively, and heat and evapor...

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Abstract

The invention relates to the technical field of new functional materials. It discloses a catalyst for improving the synthesis conversion rate of dioctyl phthalate plasticizer. It uses cobalt chloride hexahydrate and ferroferric oxide magnetic powder as main raw materials, and utilizes magnetic oxidation. The cobalt oxide nanocomposite material coated with iron has strong catalytic activation performance, rich pores, large specific surface area, low dosage, and can catalyze more reactive groups, making the conversion rate of dioctyl phthalate reach More than 99.8%, the plasticizer obtained by synthesis has high plasticizing efficiency, and due to its magnetism, the recycling rate is high, which significantly reduces the cost. The catalyst prepared by the invention solves the problem of existing dioctyl phthalate plasticizer The problem of low conversion rate in the synthesis reaction has practical significance in reducing the production cost of phthalate plasticizers and expanding the applicable fields of metal catalysts. It is a technical solution that is extremely worthy of promotion and use.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, and in particular relates to a catalyst for improving the synthetic conversion rate of a dioctyl phthalate plasticizer. Background technique [0002] Plastic is a high molecular compound polymerized by addition polymerization or polycondensation reaction with monomer as raw material. It is commonly known as plastic or resin. It can freely change its composition and shape. , Colorants and other additives. Among them, plasticizers are generally also called plasticizers. Plasticizer is a polymer material additive widely used in industry. Adding this substance in plastic processing can make it more flexible, easy to process, and can be legally used for industrial purposes. [0003] Plasticizers are classified into aliphatic dibasic acid esters, phthalates (including phthalates and terephthalates), benzoate esters, benzoate esters, poly Alcohol esters, chlorinated hydrocarbons, epo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J35/02B01J35/10C07C67/08C07C69/80B01J35/00
CPCC07C67/08B01J23/002B01J23/75B01J35/40B01J35/61C07C69/80
Inventor 纪安全
Owner 广东远承化工有限公司