Preparation method of diisobutyl phthalate

A technology of diisobutyl phthalate and isobutanol, which is applied in the field of preparation of diisobutyl phthalate, can solve the problems of harmful crops, unfavorable crop growth, unsuitable and other problems, and achieves no by-products, good The effect of industrial application value and short reaction cycle
CN105237394AInactive Publication Date: 2016-01-13DANYANG CITY AUX CHEM PLANT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DANYANG CITY AUX CHEM PLANT
Publication Date
2016-01-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of diisobutyl phthalate. The method comprises the following steps: 1, early stage preparation; 2, esterification reaction; 3, neutralization reaction; 4, dealcoholysis and decolorizing reaction; and 5, press filtration and packaging. In the above technical scheme, phthalic anhydride and isobutanol undergo a reaction with concentrated sulfuric acid as a catalyst to synthesize the diisobutyl phthalate plasticizer. The method has the advantages of simple and controllable process, high reaction efficiency, no byproducts, high output, good economic benefit, short reaction cycle, mild reaction conditions, good industrial application values, satisfactory recycling of wastewater and waste residues, and raw material saving.
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Description

technical field

[0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a preparation method of diisobutyl phthalate. Background technique

[0002] Plasticizer, also known as plasticizer. It 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. Among them, the most cost-effective phthalates (also called phthalates) are the most widely used, with an annual global usage of more than 8 million tons, of which phthalate plasticizers are the mainstay, accounting for 75 % share. Among them, diisooctyl phthalate (DEHP) is the most produced, followed by dibutyl phthalate (DBP).

[0003] Diisobutyl phthalate, also known as diisobutyl phthalate (English name Diisobutylphthalate; phthalicaciddiisobutylester); 1,2-benzenedicarboxylic diisobutylester; 1,2-benzenediisobutylester Di(2-me...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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