Preparation method for polyester polyol by grease restructuring

A technology of polyester polyol and structural reorganization, applied in the preparation of carboxylate, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of foaming performance defects, difficulty in forming a three-dimensional structure, etc., and reduce the cost of raw materials , the effect of reducing operating costs
CN102199090AActive Publication Date: 2011-09-28INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Publication Date
2011-09-28

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Abstract

The invention discloses a preparation method for polyester polyol by grease restructuring, comprising the following steps: carrying out a basic hydrolysis on grease raw materials to prepare aliphatic acid and glycerin; weighing to take certain mass proportion of aliphatic acid, acetate, hydrogen peroxide (30%) and a catalyst, wherein m aliphatic acid: m acetate : m hydrogen peroxide : m sulfuric acid = 100:0-50:40-150:1-5, and adding the aliphatic acid, acetate and the catalyst into a reactor simultaneously; adding the hydrogen peroxide dropwisely for 1 hour to 2 hours at a temperature of 40 DEG C, standing the mixture for reaction for 2 to 4 hours at a temperature of 60 DEG C, and carrying our a ring opening hydrolysis for 1 hour to 2 hours in backflow state; carrying out phase splittingon the oxidized product, adding glycerin and an esterification catalyst into the organic phase, and carrying out esterification for 1 hour to 2 hours at a temperature of 180 DEG C under the conditionof reduced pressure (5-10 Kpa). Therefore, aliphatic acid polyester polyol with an acid value of 1 to 10 mg KOH / g and a hydroxyl value of 280 to 410 mg KOH / g is obtained.
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Description

technical field

[0001] The invention belongs to the field of biomass material preparation, and mainly relates to the preparation of environmentally friendly polyester polyol for foaming. Background technique

[0002] The preparation of grease-based polyols in current patents is mainly the direct transesterification method, such as (CN101747497A, CN101602665,) and the like. These methods only rely on polyols to introduce hydroxyl groups, the hydroxyl value is low, and the controllable range is small. From a structural point of view, transesterification can only connect hydroxyl groups to one side of the fatty acid. Such polyols have certain defects in foaming performance, and it is difficult to form a three-dimensional structure. Therefore, they must be used in conjunction with other polyols. Contents of the invention

[0003] In order to solve the defect that the oil-based polyols in the prior art are difficult to form a three-dimensional structure when foaming, the p...

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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