Process for continuously preparing double metal cyanide complex catalyst
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A double metal cyanide, catalyst technology, applied in organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, chemical/physical process and other directions, can solve the problems of unstable product performance, liquid surface foam, etc.
Inactive Publication Date: 2003-11-26
SINOPEC JINLING PETROCHEMICAL CO LTD
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[0022] The purpose of the present invention is to simplify the cumbersome process of the intermittent washing method used when removing the by-product impurities in the cat making process, and solve the shortcoming of unstable product performance caused thereby; another purpose of the present invention is to solve the problem of the reaction mixture in the previous patent The liquid level that strong mixing method brings produces a large amount of foam problems; Another object of the present invention proposes more effective cat drying method
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[0091] Using cat E with the same conditions as above, the results are as follows:
[0092] Induction period (min): 40min
[0093] Total reaction time (min): 240
[0094] Maximum reaction rate (g PO / min): 12g / min
[0095] Polyol:
[0096] Hydroxyl value (mg KOH / g): 28.1
[0097] Double bond content (mol / Kg): 0.0015
[0098] Viscosity (25°C, mpa s): 757 Example of continuous process stability of the present invention
[0099] With embodiment 1 processing steps, different batches of catalysts are prepared, and polyoxypropylene dibasic alcohols (M n =4000) the result is as follows: Comparative Example of Batch Stability of Catalyst Prepared by Batch Method in Laboratory
[0100] Different batches of catalysts are made with the process step of comparative example 1, and polyoxypropylene dibasic alcohol (M n =4000) the result is as follows:
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Abstract
The continuous process of preparing double metal cyanide catalyst includes the steps of: mixing reaction of the materials, filtering and washing, replacement of water, concentration and addition of functional polymer. The catalyst is used in synthesis of polyether polyol and has high reaction activity and short inducing period. The prepared polyether polyol has very low unsaturation degree. The present invention has a technological period within 36 hr.
Description
technical field [0001] The present invention relates to double metal cyanide (DMC) complex catalyst manufacturing process Background technique [0002] As we all know, double metal cyanide complex catalyst (DMC cat) is used for ring-opening polymerization of epoxide, and its composition is generally: [0003] m a 1 [M 2 (CN) b (G) c ] d ·xM 3 (X) e ·wH 2 O·yL 1 · zL 2 Formula I [0004] m 1 is at least one metal ion selected from: Zn (II) , Fe (II) , Fe (III) 、Co (II) 、Ni (II) 、Mo (IV) , Sn (II) 、Cu (II) , Pb (II) 、Mo (VI) 、Al (III) , V (IV) , V (V) 、Sr (II) , W (IV) , W (VI) , Mn (II) and Cr (III) [0005] m 2 is at least one transition metal ion selected from: Fe (II) , Fe (III) 、Co (II) 、Co (III) 、Cr (II) 、Cr (III) , Mn (II) , Mn (III) , V (IV) , V (V) 、Ir (III) 、Rh (III) 、Ni (II) 、Ru (II) [0006] m 3 stands for M 1 and / or M 2 [0007] G, X is CN - , F - , Cl - 、Br - , I - , OH - , NO 2 - , CO 3 2- , NO ...
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