Refining method for recovering butanol and octanol by post-hydrogenation of butanol waste liquid
A refining method and technology of butanol, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve the problems of low utilization rate and high energy consumption, and improve utilization rate, reduce separation cost, reduce effect of difficulty
Active Publication Date: 2019-02-19
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0009] In order to solve the problems of low utilization rate or high energy consumption in the prior art, a method is proposed to hydrogenate the aldehydes in the butanol waste liquid to alcohol, and then undergo a rectification process to obtain butanol and octanol products.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0029] (1) Dehydration: The waste liquid of butanol and octanol enters the dehydration tower, and through the rectification process, water, hydrocarbons, isobutyraldehyde and n-butyraldehyde are distilled from the top of the dehydration tower, and the water phase is separated and discharged in the stratifier after being condensed, and the oil phase is discharged. Partial extraction, partial reflux, extracting the bottom stream from the bottom of the tower; the temperature at the top of the tower is 50°C, the pressure at the top of the tower is 0.12MPa, and the temperature of the bottom of the tower is 136°C;
[0030] (2) Separation of butanol a: the stream from the bottom of the dehydration tower enters the butanol tower a, and through the rectification process, the butanol product is extracted from the top of the butanol tower a, and the bottom stream is extracted from the bottom of the tower; the tower top temperature is 88°C, the pressure at the top of the tower is 0.03MPa, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention discloses a refinement method for recovering butanol and octanol through butanol-octanol waste liquid post-hydrogenation, and belongs to the technical field of butanol-octanol. In order to solve the problem of not high utilization rate or high energy consumption in the prior art, the invention provides a method, wherein the method comprises that a n-butanol product is extracted, the aldehyde in a butanol-octanol waste liquid is subjected to mixed hydrogenation to obtain an alcohol, and then a rectification process is performed to obtain the products such as butanol and octanol, wherein the specific steps comprise dehydration, separation of butanol, removal of heavy components, mixed hydrogenation of butyraldehyde and octanal, removal of hydrocarbons, separation of the butanol product, extraction of the octanol product from the side line, and other processes. With the method of the present invention, the utilization rate of the butanol-octanol waste liquid can be substantially increased, the utilization value can be substantially increased, and the economic benefits can be increased; and through the hydrogenation, the complexity of the composition of the material is reduced, the difficulty of the rectification unit can be reduced, and the separation cost can be reduced.
Description
technical field [0001] The invention relates to a method for recovering butanol and octanol from butanol waste liquid, more specifically, the invention relates to a method for obtaining butanol and octanol products from butanol waste liquid through hydrogenation and refining process. Background technique [0002] Butanol and octanol (referred to as butanol) are mainly used in the production of plasticizers dioctyl phthalate (DOP) and dibutyl phthalate (DBP). With the development of my country's plastics industry, the market demand for octyl alcohol is increasing year by year, and the production capacity of octyl alcohol in China is also increasing year by year. There is a small amount of discharge from the evaporator, phase separator and weight removal tower of the reactor of the butanol plant, and the discharged mixed liquid is called the butanol raffinate, which is equivalent to about 10% of the product quality of butanol, and It contains a lot of valuable components, but...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/141C07C29/80C07C31/12C07C31/125
Inventor 田保亮唐国旗彭晖鲁树亮李宝芹戴伟
Owner CHINA PETROLEUM & CHEM CORP