Production method of pyrrolidone products

A pyrrolidone and production method technology, applied in the production field of pyrrolidone products, can solve problems such as increased yield, high yield, and short process, and achieve the effects of shortened production process, high product yield, and reduced process energy consumption

Active Publication Date: 2016-01-13
MAIQI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Based on the problems existing in the above-mentioned prior art, the present invention provides a production method of pyrrolidone products, which has low energy consumption, high yield and short

Method used

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  • Production method of pyrrolidone products
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  • Production method of pyrrolidone products

Examples

Experimental program
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Example Embodiment

[0033] Example 1

[0034] This embodiment is a production method of pyrrolidone products, including:

[0035] Raw materials: 1,4-butanediol (99.9wt%, produced by Xinjiang Meike Chemical Industry) and ammonia (25%) enter the mixer at a molar ratio of 1:1.5 through a metering pump, and are preheated by the preheater E-101 To 195℃, a well-insulated tubular reactor R101 (inner diameter 300mm), the internal catalyst is filled with 50wt%Cu1.5wt%CaO-3wt%BaO-10wt%ZnO-30wt%SiO 2 (No. BIPT-NMP-011), the remainder is crystal water, spherical (particle size 2mm), the filling volume is 100L, the feed volume is 80L / h, the temperature measurement in the reactor shows a value of 195~198℃, indicating that the temperature distribution is uniform , Pressure back pressure control 3.0MPa. The product from the outlet of R101 is pumped into the preheater E102 through the liquid level controller adjusting the metering pump in the buffer tank V101. The sampling analysis results (mixture) of the buffer tan...

Example Embodiment

[0042] Example 2

[0043] This embodiment is a production method of pyrrolidone products, including:

[0044] Raw materials are used: 1,4-butanediol (99.9wt%, produced by Xinjiang Meike Chemical Industry) and monomethylamine aqueous solution (37%) through the metering pump into the mixer at a molar ratio of 1:2.0, and then pass through the preheater E- 101 is preheated to 205°C, a slurry-bed reactor R101 (effective volume 50L, 30LNMP in the initial stage of the reaction), the internal catalyst is 25wt%Cu5wt%ZrO 2 -3wt% BaO-40wt% SiO 2 (No. BIPT-NMP-021), the remainder is water of crystallization, powder (average particle size 80 microns), the filling volume is 2L, the feed volume is 3L / h, the temperature measurement in the reactor shows the value of 202~205℃, pressure The back pressure is controlled to 3.8MPa. The product from the outlet of R101 is pumped into the preheater E102 through the liquid level controller adjusting the metering pump in the buffer tank V101. The sampling a...

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Abstract

The invention discloses a production method of pyrrolidone products. The method includes the steps that 1,4-butanediol serves as the raw material for conducting a one-step reaction, pyrrolidone is directly produced, 1,4-butanediol is converted into the pyrrolidone series products in a reaction unit through a dehydrogenation-amination reaction in the modes of a stagewise reactor and composite catalysts, such as, alpha-pyrrolidone or N-methyl pyrrolidone or N-ethyl pyrrolidone. According to the production method, the 1,4-butanediol is dehydrogenized into gamma-butyrolactone, gamma-butyrolactone is converted into pyrrolidone in an amination mode, the gamma-butyrolactone and the pyrrolidone are coupled into the same reactor, the separation and refining steps in a traditional process are omitted, energy consumption is saved, heat emitted by amination is fully utilized, the production method is easy to conduct, the yield is raised compared with a traditional process, and the production method is more environmentally friendly.

Description

technical field [0001] The invention belongs to the field of preparation of fine chemical products, and relates to a production method of pyrrolidone products. Background technique [0002] Piperidine products are a class of fine chemical products widely used in the fields of medicine, pesticides, plastic additives, organic catalysts, curing agents, solvents, etc., especially because they have high biological activity and have a good market prospect. The currently described piperidine products include: piperidine, 3-methylpiperidine, 4-methylpiperidine, 2-methylpiperidine, 2,4-dimethylpiperidine, 3,5-dimethyl Basepiperidine, 2,2,6,6-tetramethylpiperidine, 2,6-dimethylpiperidine. The following is the introduction of some products: [0003] Pyrrolidone is an important class of organic compounds, and its general molecular formula is as follows: [0004] [0005] In the above molecular formula, R is H, CH 3 、C n h 2n+1 One of them, its main products are α-pyrrolidone, N...

Claims

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Application Information

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IPC IPC(8): C07D207/267
CPCC07D207/267
Inventor 黄龙张凤渊宋国全肖强冀德坤高帅
Owner MAIQI CHEM CO LTD
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