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

Production process of HEDP.Na2 (disodium of 1-hydroxy ethylidene-1,1-diphosphonic acid) solid

A technology of disodium hydroxyethylidene diphosphonate and disodium hydroxyethylidene diphosphonate, which is applied in the field of solid production process of disodium hydroxyethylidene diphosphonate, and can solve the problem of low purity of liquid products and the inconvenience of packaging, transportation and metering , use, high transportation costs, etc., to achieve the effect of facilitating packaging and transportation, reducing transportation costs, and improving product purity

Inactive Publication Date: 2013-06-12
SHANDONG XINTAI WATER TREATMENT TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current disodium hydroxyethylidene diphosphonate product is a liquid product, which is used for water treatment. The purpose is to soften the water quality and make calcium and magnesium ions combine into soluble salts without scaling. The liquid product has low purity and high transportation costs. Inconvenient for packaging, transportation, measurement and use

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be further described below in conjunction with specific embodiment:

[0015] A kind of solid production process of disodium hydroxyethylidene diphosphonate:

[0016] A. Neutralize and stir hydroxyethylidene diphosphonic acid and additives in a neutralization reactor to form solid particles or powder;

[0017] B. Transfer the stirred solid particles or powder into a dryer, dry and sieve.

[0018] In this embodiment, the additive refers to NaoH or KoH or NaHco3.

[0019] In this embodiment, the finished product is white granule or powdery solid.

[0020] In this example, the activity (calculated as solid disodium hydroxyethylidene diphosphonate)≧89.8%, phosphorous acid<3%, Fe3+≦<35μg / g, loss on drying 3-6%, PH1%4-6.

[0021] In this embodiment, 5-200 kg of hydroxyethylidene diphosphonic acid, 5-300 kg of NaOH, and 5-300 kg of soda ash are used.

[0022] Beneficial effects of the present invention: In this process, 5-200 kg of hydroxyethylide...

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

The invention relates to a production process of HEDP.Na2 disodium of 1-hydroxy ethylidene-1,1-diphosphonic acid) solid. The production process comprises the following steps of: A, neutralizing and mixing 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP) and additive in a neutralization reactor to form solid particles or powder; and B, transferring the mixed solid particles or powder into a drying machine for drying and sieving, wherein the additive is NaOH or KOH or NaHCO3, the finished product is white particles or powder solid, and the activity (in HEDP.Na2 solid) is more than or equal to 89.8%, bivalent phosphorus content is less than 3%, Fe<3+> content is less than or equal to 35mug / g, weight loss after drying is 3-6%, and PH1% is 4-6; and 5-200kg of HEDP, 5-300kg of NaOH and 5-300kg of soda are used. The production process of HEDP.Na2 solid provided by the invention has the advantages that product purity is improved and transportation cost is reduced and the product is convenient to package, transport, meter and use.

Description

[0001] technical field [0002] The invention relates to an additive in sewage treatment, in particular to a solid production process of disodium hydroxyethylidene diphosphonate. Background technique [0003] The current disodium hydroxyethylidene diphosphonate product is a liquid product, which is used for water treatment. The purpose is to soften the water quality and make calcium and magnesium ions combine into soluble salts without scaling. The liquid product has low purity and high transportation costs. It is not convenient for packaging, transportation, measurement and use. Contents of the invention [0004] The object of the invention is to provide a solid production process of disodium hydroxyethylidene diphosphonate which is convenient for packaging, transportation, metering and use. [0005] To achieve the above object, the technical solution adopted in the present invention is: [0006] 1. A solid production process of hydroxyethylidene diphosphine disodium, w...

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): C02F5/14
Inventor 崔进赵明喜
Owner SHANDONG XINTAI WATER TREATMENT TECH