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Epoxy resin production

一种产物、氢氧化物的技术，应用在生产环氧树脂领域，能够解决增加装置成本、表卤代醇损失等问题

Active Publication Date: 2014-08-27
BLUE CUBE IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If water is not removed, the epihalohydrin hydrolysis reaction may result in significant loss of epihalohydrin converted to by-products
If water is removed, the solid salt must then be disposed of by a downstream unit, which increases unit cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Embodiment 1: the preparation of the bishalogenated alcohol ether of bisphenol A

[0062] 22.5% bisphenol A (95% p,p'-bisphenol A purity), 77.3% epichlorohydrin and 0.22% benzyltrimethylammonium chloride (BTMAC) were mixed and kept at 45°C-60°C temperature for about three days. The mixture was analyzed by gas chromatography and found to contain approximately 50% epichlorohydrin and 15% 1,3-dichloro-2-propanol. The bishalohydrin ether of bisphenol A contained in the mixture was analyzed by HPLC and UV and found to consist of a mixture of oligomers including chlorohydrin and glycidyl ether end groups, with low residual phenolic hydroxyl (OH) content. The mixture was kept in the refrigerator until used in the dehydrohalogenation experiments.

Embodiment 2

[0063] Embodiment 2: the dehydrohalogenation of the bishalogenated alcohol ether of bisphenol A

[0064] The following equipment was used for the dehydrohalogenation reaction: IKAWorks Dispax DRL 3 / 5 / 3 rotor-stator mixer with coarse-medium-fine three-stage rotor and stator was used as high shear mixer. The internal volume of the mixer is 350ml. The mixer is driven by a gearbox through an electric motor, and the speed of the mixer is controlled by a variable frequency drive. Connect the mixer to insulated 1 / 4" diameter 316SS tubing that can be valved to 18-36 feet in length and use it as extra volume for the reaction. Connect the tubing to a Bode type A- A type 25 centrifugal separator (Podbielniak model A-25 centrifugal separator) equipped with a 316SS rotor containing 15 elements containing 4-6 holes with a diameter of 3 / 32 inch. The light phase of the centrifugal separator was and the outlet of the heavy phase is connected to a collection vessel.

[0065] 200 ml / min of th...

Embodiment 3

[0068] Embodiment 3: the preparation of the bishalogenated alcohol ether of bisphenol A

[0069] 34.2 lbs of bisphenol A (95% p,p'-bisphenol A purity), 97.0 lbs of epichlorohydrin, 38.8 lbs of isopropanol, and 12.8 lbs of deionized water were placed in a jacketed stainless steel reactor equipped with an agitator Combine, and mix until the BPA is dissolved. The contents of the reactor were heated to 40°C. 35.4 lbs of 22% NaOH (1.3 mol NaOH / mol bisphenol A) was continuously added over 5 hours with stirring, maintaining the reaction temperature at 40°C. After the addition of caustic soda was completed, the reaction mixture was kept at 40° C. while stirring for one hour to allow the caustic soda to fully react. The contents of the reactor were cooled to 20°C, then the stirrer was stopped and the biphasic mixture was allowed to stand for 30 minutes, allowing the two liquid phases to separate. 53.0 lbs of brine was withdrawn from the reactor. 8.8 pounds of deionized water were a...

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PUM

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Abstract

A process comprising: a) contacting a polyhydric phenol and an epihalohydrin in the presence of a catalyst under reaction conditions to form an organic feed comprising a bishalohydrin ether; b) contacting the organic feed and an aqueous feed comprising an inorganic hydroxide with a high shear mixer to produce a first mixed feed; c) contacting the first mixed feed with a phase separator to form a first organic product comprising an epoxy resin and a first aqueous product; and d) recovering the first organic product, is disclosed.

Description

[0001] References to related applications [0002] This application claims the benefit of US Provisional Application 61 / 577,352, filed December 19, 2011. technical field [0003] Embodiments disclosed herein relate generally to methods for producing epoxy resins by contacting a polyphenol with an epihalohydrin to form a chlorohydrin intermediate, and subsequently contacting the chlorohydrin intermediate with an inorganic hydroxide. Background technique [0004] In the process of producing low-molecular-weight epoxy resins from polyphenols and epihalohydrins, two reactions must be completed: 1) the etherification (coupling) reaction for the preparation of dihalohydrin ethers of polyphenols, and 2) the bishalogenation of polyphenols The dehydrohalogenation (epoxidation) of haloalcohol ethers with inorganic hydroxides produces epoxy resins. Two approaches are taken to this problem. The first route, accomplishes both of the above reactions simultaneously, typically by adding a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/06
CPCC08G59/063C08G59/022C08G59/08
Inventor J.A.阿蒂亚斯P.J.卡尔伯格R.S.迪克西特R.M.德拉克D.蒂尔托维德乔乔D.H.韦斯特W.G.沃利T.C.扬
Owner BLUE CUBE IP
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