Synthesis of bisphenols
一种双酚、化合物的技术，应用在制备双酚的装置领域，能够解决温度控制困难等问题
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Embodiment 1
[0068] Example 1. Reactive stripper for bisphenol A (BPA).
[0069] A modified laboratory Kühni TM An extraction column was used in this example. It has 5 sections, where the top two sections are modified by removing the impeller and horizontal baffles for gas-liquid separation and product removal, while the bottom 3 sections are mainly used for reaction. Each section was separated by providing a 100 mesh SS316 screen to support and prevent ion exchange resin (IER) catalyst carryover. All feeds and lines were heattraced and insulated to avoid solidification of reactants. Will Kühni TM The jacket of the extraction column is split into two sections to help achieve the temperature profile within the column. The bottom section of the column has a first utility supply, while the top four sections have a second utility supply. Hot nitrogen was supplied at the bottom of the column through a non-return valve and a glass sintered plate to ensure that the gas was distributed in s...
Embodiment 2
[0075] Embodiment 2. The performance of bisphenol A reaction tower.
[0076] Multiple factors can affect image 3 Performance of BPA reactor column 50 with phenol, acetone and cocatalyst feed 53 , with additional acetone feed 61 and catalyst 62 is shown. The reactor column 50 includes a drive motor 51 , a gearbox 52 , a vessel wall 53 , a shaft 54 , a stator 55 and a rotor 56 . Reactor column 50 is sparged with inert gas 64 . Factors that can affect performance include feed flow rate / WHSV 65, reaction temperature or temperature profile 66, agitation 67, nitrogen:feed ratio 68, overall acetone concentration 69, number of acetone feed splits 70, and cocatalyst concentration 71 .
[0077] In this example, the following factors were investigated: feed flow rate, reaction temperature, agitation, and nitrogen:feed ratio, while other factors were kept constant. The same experimental setup as described in Example 1 was used (run 1 was a packed bed without inert gas sparging, r...
Embodiment 21
[0079] Example 2.1. This example used 60 g of IER catalyst with an overall acetone concentration of 5% w / w (distributed as reactor feed 2% w / w, midstage 2% w / w and midstage 1% w / w ). The feed was fresh phenol, acetone and 3MPA. Table 2 lists the experimental results.
[0080] Table 2. BPA reactive stripping results - low superficial gas velocity.
[0081]
[0082]
[0083] This example was performed with a low nitrogen:liquid feed ratio and agitation. Basecase experiments were performed at very low RPM to avoid channeling. According to Experiment Nos. 2-6, it can be observed that the selectivity of p,p-BPA is not affected by the increase of feed flow rate. Experiments performed at lower temperatures showed improved selectivity. The lowest water concentration achieved by stripping in Experiment No. 6 was 0.947% w / w.
[0084] By comparing the base case to the stripping experiments, no effect of water removal on improving acetone conversion was observed because acet...
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