Low-cost separation method and device for fatty acid mixture

A technology of mixed fatty acid and separation method, applied in the field of low-cost separation method and separation device of mixed fatty acid, can solve the problems of difficult separation of high value-added products, low product yield and purity, and excessive heat-sensitive decomposition, etc. Condensation, good product quality, good heat transfer effect

Inactive Publication Date: 2016-07-06
张志炳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the mixed fatty acid system containing saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids, the existing separation and refining processes gen

Method used

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  • Low-cost separation method and device for fatty acid mixture

Examples

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Example Embodiment

[0018] Example 1: A 5kt / aC12~C22 fatty acid continuous refining project

[0019] The process of continuously refining fatty acids is as figure 1 Shown. The component mass fractions of the fatty acid raw materials are as follows: C12~C14: 5%~15%; C16: 20%~30%; C18: 55%~65%; C22: 1%~3%, the heavy component is less than 1%. The processing capacity is 625kg / h. The vacuum distillation column T1 has a diameter of 1400 mm and a total height of 32000 mm, and its distillation section is provided with 16000 mm SINOPAK-B2 wallless flow structured wire mesh packing, which is divided into 3 sections. The liquid distribution adopts the LQ-II infinite point liquid distributor, and the reflux part at the top of the tower adopts spray equipment. The stripping section is equipped with 18 STV super float valve trays. The bottom of the rectification tower is a funnel type, in which the diameter of the thin tube part is 250mm, the height of the thin tube part is 2800mm, and the height of the neck...

Example Embodiment

[0022] Example 2: A 10kt / aC12~C22 fatty acid continuous refining project

[0023] The process of continuously refining fatty acids is as figure 1 Shown. The component mass fractions of fatty acid raw materials are as follows: C12~C14: 4%~10%; C16: 25%~30%; C18: 55%~60%; C22: 1%~2%, heavy component less than 1%, treat The amount is 1250kg / h. The vacuum rectification tower T1 has a diameter of 2000 mm and a total height of 36000 mm, and its rectification section is provided with a structured wire mesh packing of 18000 mm, which is divided into 3 sections. The reflux part at the top of the tower adopts spray equipment, and the liquid distribution adopts an infinite point liquid distributor. The stripping section is equipped with a regular wire mesh packing of 16000mm, and the column of the rectification tower is a funnel type, in which the diameter of the thin tube part is 500mm, the height of the thin tube part is 3000mm, and the height of the necking part of the upper part of t...

Example Embodiment

[0025] It is obtained through measurement and calculation that the method and the device to separate the mixed fatty acid can increase the yield by 6.6% compared with the existing process technology, the energy consumption per unit product can be saved by 40.6%, and the equipment investment per ton of raw materials can be saved by more than 42%. Example 3: A 100kt / a C12~C22 fatty acid continuous refining project

[0026] The process of continuously refining fatty acids is as figure 1 Shown. The component mass fractions of the fatty acid raw materials are as follows: C12~C14: 5%~10%; C16: 23%~35%; C18: 50%~68%; C22: 2%~3%, the heavy component is less than 1%, treat The amount is 12500kg / h,

[0027] Distillation tower T1 has a diameter of 6000mm and a total height of 40,000mm. Its rectification section is set at 20,000mm, and the structured wire mesh packing is divided into 3 sections. The liquid distribution adopts an infinite point liquid distributor. The stripping section is e...

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Abstract

The invention discloses a low-cost separation method and device for fatty acid mixture.A decompression rectifying tower is used for continuously separating and refining C12-C22 fatty acid components.A direct contact condensation mode is adopted in the tower top to efficiently cool rising material steam, the cooled rising material steam is processed by a heat recovery boiler into secondary steam to be used, a vapor-phase product on the tower bottom is processed by a demister and then condensed, and acceptable products are extracted.Residues on the tower bottom enter a wiped film evaporator and an erucic acid refining tower to be separated, and high-purity erucic acid is acquired.In the whole process, by means of thermal coupling gradient utilization, the heat consumption in the production process is minimized, and low cost, low emission and high yield are achieved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a low-cost separation method of mixed fatty acids and a separation device thereof. Background technique [0002] Fatty acids are a class of carboxylic acid compounds composed of hydrocarbon groups linked to carboxyl groups. They are important industrial raw materials and basic raw materials for oleochemicals. According to the length of the carbon chain, fatty acids can be divided into short-chain fatty acids with less than 6 carbon atoms in the carbon chain; medium-chain fatty acids with 6-12 carbon atoms in the carbon chain, mainly caprylic acid and capric acid; long-chain fatty acids Fatty acid, the number of carbon atoms in its carbon chain is greater than 12. Can also be divided into three classes according to whether the carbon-hydrogen bond on its carbon-hydrogen main chain is saturated or not: saturated fatty acid, the carbon-hydrogen bond on its carbon-hydrogen main chai...

Claims

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Application Information

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IPC IPC(8): C11C1/10B01D3/14B01D3/10B01D3/26C07C51/43C07C51/44C07C57/03
CPCB01D3/10B01D3/148B01D3/26C07C51/43C07C51/44C11C1/10C07C57/03Y02P20/10Y02P70/10
Inventor 张志炳张锋王宝荣邓自磊
Owner 张志炳
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