Title of Invention	A PROCESS FOR THE PREPARATION OF INORGANIC PIGMENT BASED ON MIXED RARE EARTH OXIDES
Abstract	The patent discloses a novel environment friendly high temperature pigment of dark red-brown hue based on rare earth oxides containing cerium oxide (40-60 wt%), lanthanum oxide ( 10-25 wt%), neodymium oxide (5-15 wt% ), praseodymium oxide( 2- 10 wt%), samarium oxide( 2- 10 wt%) , gadolinium oxide (1 - 5 wt%) from a raw material, namely, mixed rare earth carbonate, wherein individual carbonate is intimately mixed with each other due to the way of preparation of it. The patent also relates to a novel processing route, namely, thermal plasma processing, wherein the mixed rare earth carbonate is heat treated in a plasma furnace to prepare the pigment. Availability of very high temperature, high energy flux and plasma state condition in the plasma arc allows the reactions to be completed in very short duration. Pigment finds extensive applications as glazes, colourants in Ceramic industry. It also can be used as colourants in plastics, coatings, glass enamels.

Title of Invention

A PROCESS FOR THE PREPARATION OF INORGANIC PIGMENT BASED ON MIXED RARE EARTH OXIDES

Abstract

The patent discloses a novel environment friendly high temperature pigment of dark red-brown hue based on rare earth oxides containing cerium oxide (40-60 wt%), lanthanum oxide ( 10-25 wt%), neodymium oxide (5-15 wt% ), praseodymium oxide( 2- 10 wt%), samarium oxide( 2- 10 wt%) , gadolinium oxide (1 - 5 wt%) from a raw material, namely, mixed rare earth carbonate, wherein individual carbonate is intimately mixed with each other due to the way of preparation of it. The patent also relates to a novel processing route, namely, thermal plasma processing, wherein the mixed rare earth carbonate is heat treated in a plasma furnace to prepare the pigment. Availability of very high temperature, high energy flux and plasma state condition in the plasma arc allows the reactions to be completed in very short duration. Pigment finds extensive applications as glazes, colourants in Ceramic industry. It also can be used as colourants in plastics, coatings, glass enamels.

Full Text

Documents:

592-del-2007-abstract.pdf

592-del-2007-Claims-(16-04-2013).pdf

592-del-2007-Correspondance Others-(16-04-2013).pdf

592-del-2007-Correspondence Others-(26-08-2008).pdf

592-del-2007-correspondence-others.pdf

592-del-2007-description (provisional).pdf

592-del-2007-form-1.pdf

592-del-2007-Form-18-(26-08-2008).pdf

592-del-2007-form-2.pdf

592-del-2007-form-3.pdf

592-del-2007-form-5.pdf

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Patent Number

264579

Indian Patent Application Number

592/DEL/2007

PG Journal Number

02/2015

Publication Date

09-Jan-2015

Grant Date

06-Jan-2015

Date of Filing

19-Mar-2007

Name of Patentee

COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH

Applicant Address

ANUSANDHAN BHAWAN, RAFI MARG, NEW DELHI-110 001, INDIA.

Inventors:

#	Inventor's Name	Inventor's Address
1	BHATTACHARJEE SARAMA	REGIONAL RESEARCH LABORATORY BHUBANESWAR-751 013 ORISSA, INDIA.
2	JAYASANKAR KALIDOSS	REGIONAL RESEARCH LABORATORY BHUBANESWAR-751 013 ORISSA, INDIA.
3	GALGALI RAMCHANDRA KRISHNARAO	REGIONAL RESEARCH LABORATORY BHUBANESWAR-751 013 ORISSA, INDIA.
4	ACHARYA BHABANI SANKAR	REGIONAL RESEARCH LABORATORY BHUBANESWAR-751 013 ORISSA, INDIA.
5	RAJEEV	REGIONAL RESEARCH LABORATORY BHUBANESWAR-751 013 ORISSA, INDIA.

PCT International Classification Number

C07D

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA