A thermal integration process of de-light and de-heavy tower of isobutene unit
A light tower, isobutylene technology, applied in the chemical industry, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of complex changes, unsuitable multi-component separation tasks, high investment and maintenance costs
Active Publication Date: 2016-07-06
DALIAN UNIV OF TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, there is a certain gap in volatility and the separation tasks of multi-component systems that require multiple rectification towers are not suitable. In addition, due to the complicated changes, the required investment and maintenance costs are high
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 Construction
[0015] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.
[0016] For a petrochemical 100,000 tons / year isobutene plant, isobutene light and heavy removal part, feed composition: 90.7wt% isobutene, 0.8wt% dimethyl ether, 6.5wt% MTBE, 1.1wt% methanol, 0.9wt% water, annual After working for 8000 hours, the purity of the product isobutene is required to be greater than 99.9wt%. Before the transformation, the pressure of the isobutene light removal tower was 0.97MPa, the top of the tower was 63.8°C, the bottom of the tower was 71.9°C, the heat load of the steam reboiler of the light removal tower was 816KW, and low-pressure steam was used for heating. The material in the tower kettle flows into the isobutene weight removal tower by self-pressure. The pressure of the isobutene weight removal tower is 0.66MPa, the top of the tower is 52.8°C, and the bottom of the tower i...
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 invention provides a double-effect distillation heat integration process for purifying isobutylene. A process device comprises an isobutylene light component removing tower, a light component removing tower steam reboiler, a light component removing tower reboiler, a light component removing tower bottom pump, a light component removing tower feeding preheater, a light component removing tower water cooling device, a light component condensation tank, an isobutylene heavy component removing tower, a heavy component removing tower condensation tank, a heavy component removing tower water cooling device and a heavy component removing tower reboiler. Crude isobutylene is preheated to 55 DEG C in the light component removing tower feeding preheater and then enters the isobutylene light component removing tower; the crude isobutylene contains a small amount of impurities such as dimethyl ether, methyl alcohol, MTBE and water; methyl alcohol and C4 are azeotropic, so that dimethyl ether and methyl alcohol are removed from the top of the isobutylene light component removing tower, and residual isobutylene tower bottom liquid is pressurized by virtue of the light component removing tower bottom pump and is sent to the isobutylene heavy component removing tower; and heavy components such as MTBE and water are removed from the bottom of the isobutylene heavy component removing tower, and pure isobutylene is extracted from the heavy component removing tower condensation tank.
Description
technical field [0001] The invention provides a heat recovery method applied to an isobutene device, which performs double-effect rectification heat integration on the isobutene de-lightening and de-weighting tower, specifically by adjusting the tower pressure and using the steam at the top of the isobutene de-weighting tower as the light-removing tower Heat source and preheat crude isobutene feed. technical background [0002] Isobutylene, also known as 2-methylpropene, is an important chemical raw material and is widely used in the preparation of butyl rubber, methacrylonitrile, antioxidants and tert-butyl ether. Isobutene production processes mainly include methyl tert-butyl ether cracking method, tert-butanol dehydration method and isobutane dehydrogenation method, among which methyl tert-butyl ether cracking method is the most commonly used, but the separation process of this method needs to consume a lot of low-pressure steam and circulating cooling water. Therefore,...
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): C07C7/04C07C11/09
CPCY02P20/10
Inventor 董宏光邹雄王凯凯刘鹏飞
Owner DALIAN UNIV OF TECH