Novel process for producing vinyl chloride from methanol
A new process technology for vinyl chloride, which is applied in the new process field of methanol production of vinyl chloride, can solve the problems of small adjustable range, low ethylene selectivity, and high production cost, and achieve the goals of large flexible control range, improved product quality, and reduced output Effect
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Embodiment 1
[0057] refer to figure 1 , the present embodiment takes methanol as the main raw material, and adopts the process route of methanol-dimethyl ether-ethanol-ethylene-vinyl chloride to produce vinyl chloride products. The specific process includes the following steps:
[0058] Methanol with a purity greater than or equal to 99.85% is preheated and vaporized in the vaporization reactor 1 and then introduced into the dimethyl ether synthesis reactor 2 as a raw material. 2 o 3 Or under the action of molecular sieve catalyst, dimethyl ether and water are produced, and the fuel gas produced by the reaction is introduced into the cracking furnace as fuel. Dimethyl ether is introduced into the dimethyl ether packed rectification tower 3 for rectification separation, and the separated dimethyl ether is introduced into the carbonylation reactor 4, and carbonylated with CO to produce methyl acetate, and methyl acetate and hydrogen are introduced into hydrogenation At the top of reactor 5...
Embodiment 2
[0065] refer to figure 2 , In this embodiment, methanol is used as the main raw material, and the vinyl chloride product is produced by the process route of methanol-acetic acid-ethanol-ethylene-vinyl chloride.
[0066]The difference between this embodiment and embodiment 1 lies in the method of obtaining ethanol.
[0067] In this embodiment, methanol with a purity greater than or equal to 99.85% is introduced into the acetic acid synthesis reactor 14, CO is introduced and reacted under the action of a catalytic system composed of Rh catalyst and iodide to obtain crude acetic acid, and the crude acetic acid is stored in the acetic acid rectification tower 15 After refined and separated, it is introduced into the raw material gas mixer 16, and another pipeline transfers the H in the boundary area. 2 Introduce raw material gas mixer 16 to prepare mixed gas, after the mixed gas is removed dust and water by dust removal system, it is introduced into acetic acid hydrogenation rea...
Embodiment 3
[0070] refer to image 3 , In this embodiment, methanol is used as the main raw material, and the vinyl chloride product is produced by the process route of methanol-dimethyl oxalate-ethanol-ethylene-vinyl chloride.
[0071] The difference between this embodiment and embodiment 1 is that the methods for obtaining ethanol are different.
[0072] In this embodiment, methanol, O with a purity greater than or equal to 99.9% 2 , NO are respectively introduced into the methyl nitrite synthesis reactor 18 through pipelines, methyl nitrite is produced under the catalyst action, methyl nitrite is introduced into the dimethyl oxalate synthesis reactor 19, and another pipeline introduces CO into dimethyl oxalate Ester synthesis reactor 19, dimethyl oxalate is generated in the catalytic reaction of Pd / alumina catalyst, and dimethyl oxalate is introduced into DMO hydrogenation reactor 21 after being rectified by dimethyl oxalate rectification tower 20, and hydrogenation reaction is carrie...
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Abstract
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