Simple device for large-scale butene recovery and purification, and recovery and purification method
A large-scale, butene technology, applied in chemical instruments and methods, distillation purification/separation, hydrocarbon purification/separation, etc., can solve the problems of inability to reuse, low purity, etc., and achieve easy implementation and simple operation process. , the effect of improving the recovery rate
Pending Publication Date: 2018-05-15
TIANJIN 3&G CHEMTECH RES INST
View PDF1 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In the company's utility model patent ZL 201520743549.X, a laboratory butene (olefin compound with a carbon number of C4) recovery device was described. The low purity of butene is about 60-70%. With the increase of the amount of recovered butene, a very obvious problem arises, how to deal with these recovered butenes? The best way is to reuse recovered butene, but its purity is far from the 95-99% required for reuse
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
[0044] The method for recovering and purifying butene in a large-scale butene recovery and purification device, the specific steps are:
[0045] 1 Turn on the first-stage condenser and the second-stage condenser respectively for pre-cooling, the first-stage condenser and the first-stage rectification tower are cooled to 0°C, and the second-stage condenser and the second-stage rectification tower are cooled to -15°C;
[0046] 2 Open the first shut-off valve and heat the reactor so that the mixed olefin gas enters the primary distillation column from the reactor through the rotameter. The rotameter is used to calculate the feed amount, and the mixed olefin gas enters the primary condenser at 0°C Under the action of separating the C5 and above olefin components in liquid form, open the third stop valve, so that the C5 and above olefin components in liquid form enter the recovery tank, while the gas phase C4 and below components pass through the primary condenser ;
[0047] 3 Ope...
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 relates to a simple device for large-scale butene recovery and purification, and a recovery and purification method. The device comprises a reactor, a primary rectifying tower, a primarycondenser, a secondary rectifying tower, a secondary condenser and a butane collecting tank which are sequentially connected; the lower part of the secondary rectifying tower is connected with the reactor through a one-way valve, a sampling port is formed in the lower part of the secondary rectifying tower, a recovery tank is connected under the primary rectifying tower, and an exhaust port is formed in the upper part of the secondary condenser. The simple device provided by the invention has the beneficial effects that the efficient purification can be performed from mixed olefin from propylene C3 to terpene C9 to obtain high-purity butene with a purity of 95-99 percent; the raw material waste is avoided through a butene circulation mode, the wastes of raw material and products in the instrument adjusting process are reduced, the raw materials are utilized to a greatest extent, and the recovery rate of the butene is greatly improved; the purification and recovery device can meet thedemands of the large-scale butene purification and is suitable for the purification of hundred kilograms to several tons of the butene in a pilot-scale test.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a simple device for recovering and purifying large-scale butene and a recovery and purification method. Background technique [0002] During the butylation reaction, it is generally necessary to use excess butene, and after the reaction, the remaining butene needs to be recovered. There are already mature technologies and equipment for the recovery of butene in industrial production. Due to the complexity and high cost of industrial equipment, it is unaffordable to recover and reuse laboratory and pilot scale butene. However, after the butylation reaction, if the butene is not recycled, it will be put into nature, and the harm is self-evident. The specific gravity of butene is higher than that of air, and its explosion limit is wide. It is flammable, explosive, and has an unpleasant smell. It is dangerous and pollutes the environment if it is put into nature. In ad...
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 Applications(China)
IPC IPC(8): C07C7/00C07C7/04C07C11/08
CPCC07C7/005C07C7/04C07C11/08
Inventor 魏文灏李云伟李冠军尹波
Owner TIANJIN 3&G CHEMTECH RES INST