Process for preparation of copper compounds

Patent metadata

Field	Value
Publication number	US-12075783-B2
Application number	US-201917430809-A
Country	US
Kind code	B2
Filing date	Mar 15, 2019
Priority date	Feb 19, 2019
Publication date	Sep 3, 2024
Grant date	Sep 3, 2024

Abstract

The present invention relates to a process for preparation of copper fungicide compounds. More particularly, the present invention relates to a continuous process for production of tribasic copper sulphate (TBCS).

First claim

The invention claimed is:

1. A process for preparing a copper fungicide comprising:
(a) reacting metallic copper with copper tetraamine complex to obtain a diamine copper complex;
(b) reacting the diamine copper complex with oxygen to obtain a copper fungicide precursor; and
(c) modifying the pH of the copper fungicide precursor in the absence of metallic copper to form the copper fungicide.

2. The process as claimed in claim 1 , wherein step c) further comprises reducing the pH of said copper fungicide precursor in the presence of a neutralizing agent.

3. The process as claimed in claim 1 , wherein said copper fungicide is tribasic copper sulfate and said copper fungicide precursor is a tetramine copper complex.

4. The process as claimed in claim 1 , wherein the neutralizing agent is sulfuric acid.

5. The process as claimed in claim 1 , wherein the copper fungicide is selected from copper oxide, copper oxychloride, copper acetate, copper carbonate, copper hydroxide, copper naphthenate, copper oleate, copper silicate, and tribasic copper sulphate.

6. A fungicidal formulation comprising:
(a) an agrochemical active comprising at least one copper fungicide prepared by the process of claim 1 , the copper fungicide having a particle size D50 between 3 and about 20 microns; and
(b) at least one agrochemically acceptable excipient.

7. The formulation of claim 6 , further comprising an agrochemical active.

8. The formulation of claim 6 , wherein the at least one additional agrochemical active is a second fungicide.

9. The formulation as claimed in claim 8 , wherein the second fungicide is selected from:
(a) at least one multisite fungicide selected from:
(i) elemental sulfur;
(ii) dithiocarbamate fungicides selected from amobam, asomate, azithiram, carbamorph, cufraneb, cuprobam, disulfiram, ferbam, metam, nabam, tecoram, thiram, urbacide, ziram, dazomet, etem, milneb, mancopper, mancozeb, maneb, metiram, polycarbamate, propineb and zineb;
(iii) phthalimide fungicides selected from folpet, captan and captafol;
(iv) chlorothalonil;
(v) sulfamide fungicides selected from dichlofluanid and tolylfluanid;
(vi) guanidine fungicides selected from dodine, guazantine and iminoctaadine;
(vii) anilazine;
(viii) dithianon; and
(ix) combinations thereof;

or;
(b) at least one systemic fungicide selected from:
(i) a quinone outside inhibitor selected from fenamidone, famoxadone, and a strobilurin fungicide selected from the group consisting of azoxystrobin, mandestrobin, coumoxystrobin, enoxastrobin, flufenoxystrobin, pyraoxystrobin, dimoxystrobin, enestrobin, fluoxastrobin, kresoxim-methyl, metominostrobin, orysastrobin, picoxystrobin, pyrametostrobin, triclopyricarb, fenaminstrobin, pyraclostrobin and trifloxystrobin;
(ii) quinone inside inhibitor selected from cyazofamid and amisulbrom;
(iii) demethylation inhibitor selected from triflumizole, triforine, pyridinitrile, pyrifenox, fenarimol, nuarimol, triarimol and a conazole fungicide selected from the group consisting of climbazole, clotrimazole, imazalil, oxpoconazole, prochloraz, prochloraz-manganese, triflumizole, azaconazole, bitertanol, bromuconazole, cyproconazole, diclobutrazol, difenoconazole, diniconazole, diniconazole-M, epoxiconazole, etaconazole, fenbuconazole, fluotrimazole, fluquinconazole, flusilazole, flutriafol, furconazole, furconazole-cis, hexaconazole, imibenconazole, ipconazole, metconazole, myclobutanil, pencoconazole, propiconazole, prothioconazole, quinconazole, simeconazole, tebuconazole, tetraconazole, triadimefon, triadimenol, triticonazole, uniconazole, perfurazoate and uniconazole-P;
(iv) succinate dehydrogenase inhibitor selected from the group consisting of benodanil, flutolanil, mepronil, fluopyram, fenfuram, carboxin, oxycarboxin, thifluzamide, bixafen, fluxapyroxad, furametpyr, isopyrazam, penflufen, penthiopyrad, sedaxane and boscalid; and
(v) combinations thereof.

10. The fungicidal formulation of claim 8 , further comprising a third fungicide.

11. The fungicidal formulation of claim 9 , wherein the systemic fungicide is a combination of (i) a strobilurin fungicide selected from trifloxystrobin, picoxystrobin, azoxystrobin and pyraclostrobin; and (ii) a conazole fungicide selected from prothioconazole, tebuconazole, cyproconazole, epoxiconazole, metconazole and tebuconazole.

12. A method of controlling fungi at a locus, said method comprising administering the fungicidal formulation of claim 6 to said locus.

Assignees

• Upl Ltd

Inventors

• Ferrier Frederic
• Cavasse Philippe
• Pillot Marc

Classifications

• C01G3/10

  Sulfates · CPC title

• C01G3/06

  Oxychlorides · CPC title

• C01G3/00

  Compounds of copper · CPC title

• A01N59/20 Primary

  Copper · CPC title

• C01F7/08 Primary

  by treating aluminous minerals with sodium carbonate, e.g. sinter processes (C01F7/0613, C01F7/066 take precedence) · CPC title