Unlock instant, AI-driven research and patent intelligence for your innovation.

Steam stripping inorganic process liquid discharged from hpo extraction section and utilizing heat of condensation

A technology of extraction and water vapor, applied in inorganic chemistry, organic chemistry, oxime preparation, etc., can solve the problems of high variable cost, high investment in separation equipment, not very economical, etc.

Inactive Publication Date: 2015-12-09
CAP III
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although US7408081 clearly shows that the organic solvent used to remove cyclohexanone and cyclohexanone oxime has been removed from the aqueous medium before entering the stripping zone, US7408081 does not explain how to do so
[0024] The prior art methods are still not very economical in view of the high investment required for all separation equipment and the high variable costs due to the consumption of additional energy throughout the process

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Steam stripping inorganic process liquid discharged from hpo extraction section and utilizing heat of condensation
  • Steam stripping inorganic process liquid discharged from hpo extraction section and utilizing heat of condensation
  • Steam stripping inorganic process liquid discharged from hpo extraction section and utilizing heat of condensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0090] The present embodiment is in commercial continuous production cyclohexanone oxime in the factory.

[0091] In this plant, nitrate is catalytically hydrogenated in the hydroxylammonium reactor in the hydroxylammonia reaction zone to form hydroxylamine (step I).

[0092] The obtained aqueous hydroxylammonium solution is filtered and fed into an oxime reactor (-cyclohexanone oxime synthesis zone) together with toluene and fresh cyclohexanone. Cyclohexanone oxime is synthesized in this region (step II). From the oxime synthesis reactor, the first organic phase contains about 42 wt% cyclohexanone oxime with the remainder mostly toluene, which will be further processed to obtain almost pure cyclohexanone oxime. The process involves the removal of toluene in a two-step distillation. The reboiler in the first step of distillation is driven by steam containing steam. This water vapor originates from the top of the stripper and most of the water vapor is condensed by passing...

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

No PUM Login to View More

Abstract

A continuous process for preparing cyclohexanone oxime comprising steps including passing an extracted aqueous phase comprising organic solvent directly from the extraction zone to a water stripping zone; evaporating at least 5 % by weight of the water present in the extracted aqueous phase; passing the water vapour containing stream into a heat exchanger and transferring energy from the water vapour containing stream to an in-process liquid, thereby heating the in-process liquid and condensing at least part of water vapour containing stream.

Description

technical field [0001] The present invention relates to a process for the preparation of cyclohexanone oxime, which comprises extracting cyclohexanone oxime with an organic solvent in an extraction zone, transporting the extracted aqueous phase to a combined stripping zone, wherein water vapor, organic solvent, cyclohexanone Ketones and at least 5% by weight of the extracted aqueous phase were removed. The resulting stream containing water vapor is at least partially condensed and the energy released by the condensation is used to heat the in-process liquid. [0002] The present invention relates to a continuous process for the preparation of caprolactam using cyclohexanone oxime for Beckmann rearrangement. The methods of the invention are not limited to any particular lactam. The lactam is preferably ε-caprolactam. The production methods of caprolactam include those based on the so-called (improved) Raschig technique, the hydrogenation technique based on nitric oxide, the ...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C249/08C07C249/14
CPCC07C249/08C07C249/14C01B21/1418C07C2601/14C07C251/44
Inventor 约翰·托马斯·廷格丹尼尔·朱利叶斯·玛丽亚·奥尔茨艾姆
Owner CAP III