Raw materials for water treatment chemicals

It is an organophosphonate exhibiting excellent sequestration of metal ions at stoichiometric concentration and threshold inhibition of metal salt precipitation at sub-stoichiometric concentration. Ability to deflocculate or disperse solid particles combined with its hydrolytic stability makes it a versatile antiscalants for the applications requiring efficient metal ion control.

The invention belongs to chemical field, be specifically related to a kind of production technique of Amino Trimethylene Phosphonic Acid.

Background Technology
Amino Trimethylene Phosphonic Acid (ATMP), another name: amino trimethylammonium phosphonic acids, Amino Trimethylene Phosphonic Acid, nitrilo trimethylene tri methylene phosphonic acid, nitrilo trimethylene phosphoric acid.CAS No.6419-19-8; Molecular formula is: N (CH 2PO 3H 2) 3Relative molecular mass: 299.05, structural formula is:

ATMP because the C-P key is arranged in water chemical property and stable, not facile hydrolysis.When concentration is higher in water, good corrosion mitigating effect is arranged.ATMP is used for recirculated cooling water, the oil field reinjection water system of fuel-burning power plant, refinery, can play the effect that reduces hardware or corrosion of piping and fouling.ATMP adds other water conditioner can effectively suppress growth of blue-green algae etc. because concentration is higher.ATMP will to the state control blue-green algae, keep the ecological water balance and play important effect.

ATMP as metal ion chelation agent, also can be used for metal conditioner etc. in industries such as textile printing and dyeings.The ATMP chemical stability is good, facile hydrolysis not, and high temperature resistant, during with composite uses such as zinc salt, multipolymers, have good synergistic effect and threshold effect, this product also has good corrosion inhibition under high dosage, and belongs to nontoxic, nuisanceless medicament, this product has good dispersing and antisludging performance to calcium carbonate scale.

For adapting to market to the demand of ATMP, need to provide a kind of production technique simple, cost is good than low repeatability, is easy to the production technique of the Amino Trimethylene Phosphonic Acid of suitability for industrialized production.

Summary of the invention
The object of the present invention is to provide a kind of production technique of Amino Trimethylene Phosphonic Acid.

Purpose of the present invention can be achieved through the following technical solutions:
A kind of production technique of Amino Trimethylene Phosphonic Acid, it is that this production technique comprises the following steps:
(1) add ammonium chloride, phosphorous acid aqueous solution and water in reactor, be heated to 60 ℃～70 ℃ and fully stir material is dissolved fully; Then drip formaldehyde solution, and temperature is controlled at 90 ℃～105 ℃, after formaldehyde drips and finishes, insulation is 1.5～3 hours, and the HCl that produces reclaims by the HCl recovery device;

(2) turn after insulation finishes and expect to still kettle, slowly be warmed up to 110～120 ℃, remove unreacted ammonium chloride, formaldehyde, when steaming without material, logical cooling water temperature, blowing gets finished product.
Its chemical equation is: 

The production technique of above-mentioned Amino Trimethylene Phosphonic Acid, it is ammonium chloride: phosphorous acid: the mol ratio of formaldehyde is 1: 3～6: 3～8, is preferably 1: 3: 4.The add-on of water should be able to make material dissolve fully.

The production technique of above-mentioned Amino Trimethylene Phosphonic Acid, it is that the quality percentage composition of phosphorous acid in described phosphorous acid aqueous solution is 80%, the quality percentage composition of the formaldehyde of formaldehyde solution is 37%.

Beneficial effect of the present invention
This process using one-step synthesis, with short production cycle, raw material is easy to get, and production cost is low, and repeatability better is easy to suitability for industrialized production.The raw material phosphorous acid that adopts in reaction process can be hydrolyzed into phosphorous acid to realize utilization of waste material, conservation cost, and environmental contamination reduction at acidic conditions with the dimethylphosphite residue.