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Method for producing plasticizer phthalic acid dinonyl

A technique for producing diisononyl phthalate and a production method, which is applied in the field of production of plasticizer diisononyl phthalate, can solve the problems of neutralization and water washing after post-treatment, complex wastewater treatment, etc., and achieve The production cycle is short, the product yield is high, and the effect of reducing production costs

Inactive Publication Date: 2008-04-09
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's industrial esterification reaction adopts the acid catalysis method with strong acid as the catalyst. The technology is mature and reliable, and the energy consumption is low. However, the post-treatment needs to be neutralized and washed, and the wastewater treatment is complicated. The recovered alcohol needs to be treated before it can be used.

Method used

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  • Method for producing plasticizer phthalic acid dinonyl

Examples

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Effect test

example 1

[0020] at 30m 3 Put 3,500Kg of phthalic anhydride and 10,500Kg of isononyl alcohol into a stainless steel reaction kettle, and the feeding ratio is 1:3. While stirring, the temperature is raised (hot oil temperature is 250-270°C), and the composite catalyst tetraisopropyl titanate is added to 150-160°C. Ester and solid titanium-based compound 3.5Kg (ratio 1‰), continue to heat up to 225-230 ° C, keep warm for 2-3 hours, so that the reaction is complete. Then lower the temperature to 190-195°C, dealcoholize under reduced pressure to obtain crude DINP, and obtain DINP through traditional decolorization and filtration methods.

example 2

[0022] at 30m 3 Put 3500Kg of phthalic anhydride and 12250Kg of isononyl alcohol into a stainless steel reaction kettle, the feeding ratio is 1:3.5, heat up while stirring (hot oil temperature 250-270°C), and add the composite catalyst tetraisopropyl titanate to 160-170°C Ester and solid titanium-based compound 3.5Kg (ratio 1‰), continue to heat up to 230-235 ° C, keep warm for 2-3 hours, so that the reaction is complete. Lower the temperature to 190-195°C, dealcoholize under reduced pressure to obtain crude DINP, and obtain DINP through decolorization and filtration.

example 3

[0024] at 30m 3 Put 3500Kg of phthalic anhydride and 13300Kg of isononyl alcohol into a stainless steel reaction kettle, and the feeding ratio is 1:3.8, heat up under stirring (hot oil temperature 250-270°C), and add the composite catalyst tetraisopropyl titanate to 150-160°C Ester and solid titanium-based compound 3.5Kg (ratio 1‰), continue to heat up to 225-230 ° C, keep warm for 2-3 hours, so that the reaction is complete. Lower the temperature to 190-195°C, dealcoholize under reduced pressure to obtain crude DINP, and obtain DINP through decolorization and filtration.

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Abstract

The invention relates to a production method for organic chemical product plasticizer, in particular to a production method for plasticizer phthalic acid diisononyl. The method comprises the steps as follows that: firstly, 3 to 4 portions of isononyl alcohol and one portion of bengan are filled into a reaction kettle, and then the solution is heated up when being stirred to carry a single-etherifying reaction; secondly, 0.001 to 0.002 parts of compound catalyst are filled in the solution after heating the solution to 150 to 180 DEG C; thirdly, the solution is continuously heated to 225 to 235 DEG C, and the solution is remained in the same temperature for 2 to 3 hours to carry a double-etherifying reaction, so that the in-kettle solution can be reacted fully and completely; fourthly, the solution is cooled down to 190 to 195 DEG C, and rude product of the plasticizer phthalic acid diisononyl is gained after traditionally depressurizing and dealcoholizing the solution; fifthly, the plasticizer phthalic acid diisononyl is obtained after traditionally discoloring and filtering the rude product. The invention has the advantages of avoiding the environment pollution due to acid catalysis method and decreasing the energy consumption.

Description

technical field [0001] The invention relates to a production method of a plasticizer for organic chemical products, in particular to a production method of a plasticizer diisononyl phthalate. Background technique [0002] In the organic chemical industry, in order to improve the processing performance of plastics, rubber, etc., it is necessary to add a certain proportion of plasticizers. Diisononyl phthalate, referred to as DINP, is an important plasticizer in phthalates. One, compared with the more common dioctyl phthalate (DOP) plasticizers in the market, has the following advantages: 1. The molecular weight of DINP is larger than that of DOP, and the volatilization rate is much lower than that of DOP (about half less). As a result, more plasticizer remains in the product, which not only saves costs, but also improves the environment for factory operations. 2. The anti-migration property of DINP is also better than that of DOP, so the anti-aging property of the product is...

Claims

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Application Information

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IPC IPC(8): C07C69/80C07C67/08C08K5/12
Inventor 何天华毛本春沈伟许磊董文天
Owner 无锡双象新材料有限公司
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