Trash represents anionic, dissolved or colloidal oligomers or polymers and/or non ionic hydrocolloids.

Trash causes -

a) Impairments of pulp beating/refining
b) Higher quantity of deposits
c) Deterioration of retention, drainage and sheet formation
d) Deterioration of paper quality characteristics such as tensile strength, opacity,
whiteness etc.

Rishabh's range of Trash fixers are very highly charged organic cationic polymers synthesized in controlled conditions so as to achieve optimum neutralization of anionic trash.

Drainage aids are linear very high molecular weight, Copolymers of acrylamide and acrylic acid/cationic monomers. These products are structured copolymers of acrylamide for better paper formation and have excellent solubility and negligible gel content.

The basic purpose of these products is to improve drainage and therefore reduce water content in the paper web, resulting in -

a) Saving of thermal energy/ steam required for drying of the paper

b) Possibility of increasing machine speed.

Micro-organism is a paper technologists nightmare. The little monsters disturb the operating sequence of Paper machine circulation system. The problem begins with the agglomeration and adherence of Micro-organism. This leads to formation of a bio-film causing :

" Slime lumps leading to holes in the paper and breaks in web.
" Sticking of valves and fittings causing operational problems.
" Contamination of heat exchanger surfaces leading to poor heat transmission.
" Corrosion
" Production breaks.

A solution to all these is a revolutionary new product called Rishlyte - 8094 / 8099.

Thus for the Paper Industry "Rishlyte 8094/8099"

" Prevents corrosive deposits and slimes.
" Maintains clean support wire and mist zones.
" Improves release behaviour of paper web.
" Ensures less frequent boil-out.
" Improves productivity through less breaks.
" Eliminates need for biocides completely.

Due to shortage of softwood and the replacement by hardwood as well as the strongly increased consumption of waste paper as a secondary fibre source deterioration in paper strength are inevitable. Further strength reducing factors are lower single fibre strength that were caused by chemical or mechanical damage. A further factor is a bad fibre to fibre binding.

RISHLYTE Dry Strength Additives are synthetic organic polymer derivatives. They strengthen and multiply the binding between fibres and fibres as well as fibres and fillers and therefore, improve the structure in paper.

The ADVANTAGES are improved strength properties of paper & paper board viz. breaking length, stiffness, burst as well as ply bond strength. An improvement in Retention is a desired side effect. Different grades of products have been developed for acid, neutral and alkaline paper making.

Presently conventional coagulants (i.e. salts of Aluminium or Iron) are used to precipitate dissolved solids and also to settle suspended matter in many effluent treatment plants. These pose problems of carry over finely divided flocs of aluminum hydroxide or ferric hydroxide into the clarified water and produce bulky sludge having a high water content. This increases the sludge handling and disposal costs.

Due to drop in pH on use of these coagulants, often further chemicals are needed to counter the effect.

Rishlyte range of coagulants for industrial waste water treatment consists of 'nontoxic' cationic polymers which replace inorganic coagulants (viz Alum, PAC, Lime, Ferric salts) and also reduce cost of treatment.

Numerous other benefits include -

a) Reduction in sludge volume and desludge frequency.
b) Reduced sulphate/ chlorides in the treated effluent and negligible drop in pH of treated water.
c) Reduction in corrosion in coagulant addition pipeline and pump.
d) Automated dosing & controlling of suspended in plants is possible with Rishabh's coagulants
e) Savings in labour and electricity costs

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Retention aids bind fillers and fines to the fibre so they can be retained in the sheet. If the fillers and fines are not retained with the sheet, they pass through the wire, where they create collection, disposal, and deposit problems. Retention aids also fix dyes to the sheet.

Retention mechanism is mainly by reduction or neutralization of the surface negative charge of colloidal particle, fillers and fibres thereby enabling them to coagulate and aggregate on to large fibres by bridge formation.

Rishabh's Retention and Drainage Aid Product Line consists of 25-30 products in powder and emulsion forms for optimal working in a system.

Product Charge
a) Anionic - medium & low
b) Cationic - high, medium & low

The working pH range is 4 to 9 and apart from increasing the First pass retention, these products also help increase the ash content in paper resulting in reduced cost of paper making.

These are complex cross linked and formulated polymer compounds which are specially made for Size Press to improve stiffness, smoothness, and to some extent other surface properties of paper. Improved wax pick & printability has been observed through application of Rishlyte 8514 & 8523 at size press. Normally doses vary from 1 to 2.5 kg per ton of paper depending on the end stiffness results desired. They do not interfere with efficiency of other chemicals and can be used for food grade papers. While some Lab trials are indicative, plant trials are suggested to know the results in dynamic conditions.

The products are mainly useful for increasing stiffness of paper & board made from waste paper, rice & wheat straw, bagasse, hardwood and bamboo. In some cases high value raw material incorporated in the furnish mainly for increasing stiffness can be replaced. Since it is just added as supplied, it is very easy to use.

Rishlyte-DI is a highly efficient deinking chemical. It helps in removing various inks from cellulose fibre without damaging its chain. It prevents redeposition of ink on the cellulose fibre and is compatible with alkali, alkaline silicates and peroxides which are usually incorporated during deinking process. There is no colour reversion of finished paper.

Surface active agents added in the process of boiling of wood or pulp cause foam. The degree of foam formation depends on the type & speed of machine, nature of pulp, pH etc. Foam in paper units generally occurs at the following places:

1) Pulp Mill
2) On the fourdrinier paper machine it collects in the pond and breaks away and flows with the pulp causing spots on the paper.
3) On the cylinder machine it collects at the vat causing uneven formation on the cylinder.
4) In the regulating boxes, screens, vats etc.
5) Air leakage in pumps.
6) In effluent treatment i.e. in aeration basin.

Rishabh Defoamers are developed with a view to reduce surface tension at the liquid to air surface and thus eliminate foam. The type and quantity of defoamer to be used would depend on the quality of foam, pH of the medium etc., and would have to be determined by laboratory trials.

Presently conventional coagulants (i.e. salts of Aluminium or Iron) are used to remove turbidity in water. These pose problems of carry over finely divided flocs of aluminum hydroxide or ferric hydroxide into the clarified water and also produce bulky sludge having a high water content.

During monsoon season when turbidity suddenly increases, numerous problems are faced in treatment of water with conventional chemicals e.g. Alum and Lime.

Rishlyte range of coagulants for industrial raw water treatment consists of 'nontoxic' cationic polymers which replace inorganic coagulants (viz Alum, lime, Ferric salts) and also reduce cost of treatment. Numerous other benefits include -

a) Reduction in sludge volume and desludge frequency.
b) Reduction in Aluminium ion carryover which is a health hazard.
c) Reduced load on DM plant and negligible drop in pH of treated water.
d) Reduction in corrosion in alum addition pipeline and pump.
e) Automated dosing & controlling of turbidity and suspended solids in plants
f) Savings in labour and electricity costs
g) Reduced requirement for storage space

Rishlyte 8005 series is used to decolourise effluents containing anionic, direct or reactive dyes. It is a liquid product, therefore easy to handle and is suitable for use in dyehouses and in municipal biological sewage treatment plants. It is Compatible with the usual inorganic and organic precipitants.

The amount required is 0.1-1 ml/L Rishlyte 8005, depending on the amount of unfixed dyestuff and the desired degree of decoloration. In the case of unfixed direct dyestuffs, smaller amounts are required. The degree of decoloration is determined by measurement of extinction.

Combination with other organic flocculation auxiliaries (e.g. polyacrylamides) and inorganic salts (e.g. iron salts) is possible. However, these products have hardly any effect on the flocculation of reactive dyestuffs.

Rishlyte 9231 and 9232 are also used to remove colour from industrial effluents and function as good precipitating coagulants.

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