Total organic carbon (toc) reduction in brine via chlorinolysis

A technology of total organic carbon and total organic carbon content, applied in the direction of hypochlorite, chemical instruments and methods, hypochlorous acid, etc., can solve the problems of destroying organic compounds, harmful deposition of sodium chloride, etc.

Inactive Publication Date: 2010-07-21
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of sodium chloride can present difficulties in removing organic compounds from various brine by-product streams, as some removal methods can cause unwanted deposition of sodium chloride in the separation facility
In addition, the presence of chloride ions may lead to the formation of undesirably corrosive or toxic chlorinated organic compounds during chemical treatments, thereby destroying organic compounds

Method used

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  • Total organic carbon (toc) reduction in brine via chlorinolysis
  • Total organic carbon (toc) reduction in brine via chlorinolysis
  • Total organic carbon (toc) reduction in brine via chlorinolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Destruction in the brine by-product stream (GTE brine) from the production of epichlorohydrin from glycerol is carried out at low or acidic pH from about 3.5 to about 5.5, and under chlorolysis conditions at high or alkaline pH from about 11.8 to about 8.5 Small-scale testing (proof) of principle laboratory experiments on organic compounds. Proof of Principle and Kinetic Studies Experiments are performed using about 1 to about 2 grams of sample in NMR tubes or reaction vials. The samples tested were pure glycerin dissolved in water, or GTE brine with a total organic carbon (TOC) content of about 1470 ppm and an initial pH of about 11.8. The sodium chloride content of the GTE brine is about 23% by weight. Synthetic glycerol samples or GTE saline samples were heated at a temperature ranging from about 90°C to about 100°C with an excess of bleach, which was about 6.5% by weight sodium hypochlorite in water, and glycerol destruction was detected by NMR. The samples tested...

Embodiment 2

[0076] Following the proof of principle test in Example 1, experiments were performed on a larger scale and in addition to monitoring glycerol destruction by NMR, total organic carbon (TOC) was monitored in chlorolysis reactions under acidic or low pH conditions. The brine by-product stream subjected to chlorination is a brine by-product stream from the production of epichlorohydrin from glycerol (GTE brine) having a TOC content of about 1470 ppm and about 23 wt% chlorine based on the weight of the GTE brine sodium chloride content, and a pH of about 9. A 133 g sample of GTE brine was mixed in a flask with approximately 66 g of commercial bleach. Commercially available bleach has a sodium hypochlorite content of about 6.5% by weight, with the balance being water.

[0077] By diluting the GTE brine with bleach, the calculated TOC content in the mixture of GTE brine and bleach was about 982 ppm. Based on calculations assuming all TOC is glycerol, the amount of glycerol in the ...

Embodiment 3

[0081] Following the proof of principle test in Example 1, experiments were performed on a larger scale and, in addition to monitoring glycerol destruction by NMR, also monitored total organic carbon (TOC) in chlorolysis reactions under alkaline or high pH conditions. ). The brine by-product stream subjected to chlorination is a brine by-product stream from the production of epichlorohydrin from glycerol (GTE brine) having a TOC content of about 1470 ppm and about 23 wt% chlorine based on the weight of the GTE brine sodium chloride content, and a pH of about 11.8. A 133 g sample of GTE brine was mixed with approximately 56 g of commercial bleach in a flask.

[0082] Commercially available bleach has a sodium hypochlorite content of about 6.5% by weight, with the balance being water.

[0083] By diluting the GTE brine with bleach, the calculated TOC content in the mixture of GTE brine and bleach was about 1040 ppm. Based on calculations assuming all of the TOC is glycerol, t...

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Abstract

A plurality of stages is employed to reduce the total organic carbon (TOC) content of a brine by-product stream to produce a recyclable brine stream having a TOC content of less than about 10 ppm. In a first stage treatment, a brine by-product stream may be subjected to chlorinolysis at a temperature of less than about 125 DEG C to obtain a chlorinolysis product having a TOC content of less than about 100 ppm, which may be treated in a second stage with activated carbon to obtain a TOC content of less than about 10 ppm. The chlorinolysis may be a reaction with sodium hypochlorite, which may be produced in situ by treatment of the brine by-product stream with chlorine gas and sodium hydroxide. The brine by-product stream may contain a high amount of difficult to remove glycerin, such as a brine by-product stream from the production of epichlorohydrin from glycerin.

Description

[0001] Cross References to Related Applications [0002] This application is related to the following applications filed on the same date herein, the disclosures of each of which are hereby incorporated by reference in their entirety: [0003] Application No._______________ (Attorney Filing No. 66323), filed on the same day as this article, is titled "Brine Purification." [0004] Application No._______________ (lawyer record number 66325), filed on the same day as this article, is titled "Process and Apparatus for Purification of Industrial Brine". [0005] Application No._______________ (lawyer record number 66326), submitted on the same day as this article, is titled "Process, Adapted Microbes, Composition and Apparatus for Purification of Industrial Brine". [0006] Application No._______________ (Attorney Filing No. 66327), filed on the same day as this article, is titled "Brine Purification." technical field [0007] The present invention relates to a method for reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/14C01B11/06C01D3/16
CPCC01B11/062C01D3/14C01D3/16
Inventor 苏尼尔·K·乔杜里布鲁斯·胡克克里斯·克里斯坦森让·肖韦尔戴维·韦斯特史蒂夫·格卢克塞利奥·卢梅·佩雷拉伊斯特万·伦吉尔弗兰克·凯斯特
Owner DOW GLOBAL TECH LLC
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