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Filters for Aromatic Carboxylic Acids

A technology of aromatic carboxylic acid and filter, which is applied in the separation/purification of carboxylic acid compounds, filtration separation, mobile filter element filter, etc., which can solve the problems such as the volume flow reduction of undisclosed washing filtrate, so as to reduce the size of the device and Cost, effect of economical process

Active Publication Date: 2017-04-26
INVISTA TEKSTAJLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this reference there is no disclosure of the benefit that wash filtrate volume flow can be reduced as a result of displaced seals

Method used

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  • Filters for Aromatic Carboxylic Acids
  • Filters for Aromatic Carboxylic Acids
  • Filters for Aromatic Carboxylic Acids

Examples

Experimental program
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Embodiment Construction

[0044] The present invention provides a rotary filter, typically a hydraulic multi-chamber rotary pressure filter.

[0045] Various embodiments of the invention are described below. It will be recognized that specified features in each embodiment may be combined with other specified features to provide further embodiments.

[0046] rotary filter

[0047] exist figure 1 The rotary filter machine 1 shown in includes a filter drum 2 which is located in a housing 3 and which can rotate about its axis in the housing 3 . The filter drum 2 comprises on its outer surface a filter cell 4 which is in fluid communication with a control head 6 via a drain line 5 . exist figure 2 The cross-section of the rotary filter 1 provided in shows that the housing 3 is divided around its circumference into a series of four zones comprising a slurry input zone 10 , a washing zone 20 , a drying zone 30 and a filter cake discharge zone 40 . As shown, the filter cake loaded onto the filter cells 4...

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PUM

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Abstract

A rotary filter comprising (i) a housing comprising a first wash zone comprising a first wash fluid input zone, a final wash zone comprising a final wash fluid input zone, and one or more intervening wash zone(s) each comprising a wash fluid input zone; (ii) a control head comprising a first wash fluid output zone, a final wash fluid output zone, and one or more intervening wash fluid output zone(s); and (iii) a filter drum positioned within the housing and rotatable about its axis within the housing; and (iv) means to transfer wash fluid in counter-current flow, relative to the direction of rotation of the filter drum, from a wash output zone to a wash input zone of a preceding wash zone; characterised in that the rotary filter is configured to pass wash fluid via the filter drum from a wash fluid input zone (IZn) to the wash fluid output zone (OZn) of the same wash zone (n) and additionally to the wash fluid output zone of a preceding wash zone.

Description

technical field [0001] This invention relates to improvements in the design and operation of rotary filters used in the production of aromatic carboxylic acids. Background technique [0002] Rotary filters are used in many chemical processes that require the separation of solids from liquids, such as in the manufacture of synthetic intermediates such as those suitable for the manufacture of polymeric materials and products made therefrom of aromatic carboxylic acids Such as terephthalic acid (TA) or isophthalic acid (IPA). Rotary filters offer the advantage of allowing multiple process steps to be performed in a single device. Specifically, the rotary filter first divides the slurry into a filter cake and a filtrate, and then the filter cake is subjected to subsequent treatment (such as washing, drying), and then discharged. Such subsequent steps may include, for example, one-stage or multi-stage filter cake washing, displacement washing, countercurrent washing, closed cyc...

Claims

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Application Information

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IPC IPC(8): C07C51/47C07C51/42C07C63/24C07C63/26B01D33/06
Inventor 安东尼·彼得·约翰·林巴赫保罗·迪安罗伯特·休斯
Owner INVISTA TEKSTAJLS