1. PROCESSING OF GUAR
Dr. S. Purkayastha

2. PROCESS FLOW DIAGRAM (MEAL) (SPLIT) (KORMA) GUAR PLANT GUAR PODS
GUAR PLANT
  GUAR PODS
   
GUAR SEED   
GUAR HULL ENDOSPERM GUAR KERNEL
(MEAL) (SPLIT) (KORMA)
FOOD GRADE INDUSTRIAL GRADE

3. GUAR CROP
Drought tolerant legume primarily grown in Haryana, Rajasthan & North Gujarat.
Its beans are used as vegetables for humans in Asia and gaur gum is used as a stiffener in soft ice cream, as stabilizer for cheeses, instant pudding , whipped cream substitutes ,enhance the oil recovery & used as binder/thickener in textile industry.

4. Flow Diagram of Guar Splitting Unit
Guar Seed
Seed Cleaning Equipments
(Vibro seiver, dust remover)
Fbx g3BCGDF ` c
Clean, sorted seed
Dust, stem and other foreign particles
Seed Splitting Equipment
Seivers

5. Seivers
Undehusked Split
Heating tube
Dehusking Machines
Churi dust
Dehusked Split
Polisher
Cooling
Silo
Packing
Churi, korma

6. Guar is one of the polysaccharide with highest molecular weights of all naturally occurring water soluble polymers. Recent studies with low angle laser light scattering as well as size exclusion chromatography indicate the average molecular weight to be in the range of 1000,000 – 2000,000.

7. industry-wise applications
Food Processing and Healthcare
Dairy and frozen foods, bakery products, sauces and salad dressings, beverages, canned food, special dietetics and diabetic diets, soluble fibre and various clinical nutrition recipes
Oil and Gas
Viscofier in fracturing operation in oil field (FHG, HPG and CMHPG)
Textile
Thickeners for textile, fabric and carpet printing as well as textile sizing and crisp finishing of clothes
Mining
Coal mining and coal slurry flowing aid, ores concentration, flocculation and better recovery, as gelling agent in aqueous stick explosives
Paper
Wet and dry end additives to improve strength and burst factor, reducing drainage of fines
Building and Paint
Binding, setting and cement plaster
Pharmaceuticals
Tablet binding, viscosifying syrups, disintegrating aids, suspending agents

8. PROCESSING OF GUAR FOR FOOD INDUSTRY
Important properties on food grade guar:
PARTICLE SIZE: Product should be well dispersed to produce uniform paste
VISCOSITY: Viscosity of paste should remain stable preferably more than 48hrs
Microbiological profile: Must qualify the International Standards

9. Guar particle should be globular in shape, must undergo thermo mechanical process, use of sterile water for conditioning in order to avoid bacterial contamination, continuous processing instead of batch-wise process, proper pH adjustment. The product should be processed under low shear.
Usually guar is used in conjugation with other thickeners to achieve the desired result on finished product. Hence products with different range of viscosity from 50 cps to 6500cps are being used based on its application.
The pseudo plastic behavior of guar can be modified by controlled knocking off galactose unit from the galactomannan guar. This change alters the suspending properties of guar.

10. Processing of guar for Paper industry:
While producing guar for paper application as wet end additives, the main emphasis is to be given to make the product application friendly. In order to achieve desired product one can control the particle size. A little twist on pH may alter the hydration rate. Guar in conjugation with starch shows better performance.

12. Processing of textile printing thickeners from Guar Gum :
Raw material selection: It can be produced from either highly purified guar split ( 98/99% DH splits) or preferably 300mesh Guar Gum Powder having good filterability thru 240# (63 micron ).
All input materials such as chemicals in solution form are to be filtered.
Temp. & time of reaction is to be properly monitored.
Premixing of chemicals with guar powder is also important in order to obtain uniform substitution/ degradation.
Granularity is also an important factor to be taken care of

13. Flow Diagram for Processing of Fast Hydrating Guar

14. Processing parameters of Fast hydrating Guar:
Quality of raw material
Processing technique
Cleaning & Conditioning of splits
Shearing force applied to separate guar molecules from each other without reducing its molecular weight. (roll size, shearing force, addback, regrinding etc)
Grinding equipments
Drying conditions
Particle distribution

16. Processing Fast Hydrating High Viscosity Derivatised Guar:
Quality of split
Reactor design
Extensive washing of reacted splits
Flaking of the washed splits
Uniformity of reaction from batch to batch

17. THANK YOU