Spray tower tray reactor, and system and technology for producing propylene glycol monomethyl ether through using reactor
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A technology of propylene glycol monomethyl ether and disc reactor, which is applied in the chemical industry and can solve problems such as low production efficiency, high energy consumption for separation, and unfavorable large-scale production.
Active Publication Date: 2017-09-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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The process adopts the conditions of alcohol ratio 5-6:1, residence time 1-3h, which has the disadvantages of many side reactions, high energy consumption for later separation, and low production efficiency.
[0008] CN 105585455A discloses a method for preparing ethylene glycol monomethyl ether by a continuous etherification method. The method uses ethylene glycol and methanol as raw materials to carry out etherification reaction on a fixed-bed reactor, and the feed ratio of methanol and ethylene glycol is At least 10:1, the reaction temperature is 100°C-300°C, and the space velocity is controlled at 0.3-3h -1 , there are disadvantages such as large alcohol
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Embodiment 1
[0083] A spray tray reactor, such as figure 1 As shown, including the reactor body, the reactor body is provided with a cavity;
[0084] The top, sidewall and bottom of the reactor body are respectively provided with a first feed port 101, a second feed port 102 and a discharge port 103;
[0085] In the above chamber, from top to bottom, an atomizing nozzle 104 matched with the first feed port 101, a first distributor 105 (pipe distributor) matched with the second feed port 102, and a second distributor 106 are arranged sequentially. (sintered plate distributor), multistage tray 107 (made up of 24 bubble cap trays 1071), liquid collector 108 and the third distributor 109 (100 mesh screen distributor);
[0086] A third feed port 110 is provided on the side wall of the reactor between the first distributor 105 and the second distributor 106;
[0087] Wherein, the inner diameter of the reactor is 0.3m, the distance from the top to the bottom of the cavity is 1.5m, and the atomi...
Embodiment 2
[0089] A spray tray reactor, the only difference from Example 1 is that the atomization nozzle includes 3 openings of 60° atomization nozzles, such as Figure 2b As shown, the three atomizing nozzles are distributed in an equilateral triangle, and the distance between the atomizing nozzles and the pipe distributor is 0.2m.
Embodiment 3
[0091] A spray tray reactor, the only difference with embodiment 1 is that the atomization nozzle comprises 4 openings of 45 ° of atomization nozzles, such as Figure 2c As shown, the four atomizing nozzles are distributed in a square shape, and the distance between the atomizing nozzles and the pipe distributor is 0.5m.
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Abstract
The invention provides a spray tower tray reactor, and a system and a technology for producing propylene glycol monomethyl ether through using the reactor. The spray tower tray reactor comprises a reactor body, and a cavity is arranged in the reactor body; the top of the reactor body is provided with a first material inlet, the sidewall of the reactor body is provided with a second material inlet, and the bottom of the reactor body is provided with a material outlet; and an atomizing nozzle cooperating with the first material inlet, and a first distributor, a second distributor, a multistage tower tray, a liquid collector and a third distributor which cooperate with the second material inlet are sequentially arranged in the cavity from top to bottom. The system comprises the spray tower tray reactor. When the spray tower tray reactor is used to produce the propylene glycol monomethyl ether, the epoxy propane conversion rate is improved, the propylene glycol monomethyl ether selectivity is improved, the alcohol proportion is reduced, and the production efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a spray tray reactor, a system and a process for producing propylene glycol monomethyl ether by using the same. Background technique [0002] Ethylene glycol monoether, propylene glycol monoether, polyethylene glycol monoether and polypropylene glycol monoether are more commonly used alcohol ether products in industry. Propylene glycol monomethyl ether (PM) is a non-toxic, environmentally friendly and widely used chemical solvent. It is suitable for styrene-acrylic emulsion, acrylic emulsion and latex paint system. It can reduce the film-forming temperature, promote its coagulation and film formation, and ensure the good condition of the coating film. It also has multiple uses in fuel antifreeze, cleaning agent, extraction agent, flexo printing ink, silk screen printing ink, non-ferrous metal beneficiation agent, etc. Propylene glycol monomethyl ether is t...
Claims
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