A Promising Material by Using Residue Waste from Bisphenol A Manufacturing to Prepare Fluid-Loss-Control Additive in Oil Well Drilling Fluid

Table 1

Levels and factors affecting the fluid-loss properties.

Levels	Factors
	𝐴 (°C)^a	𝐵^b	𝐶^c	𝐷^d	𝐸 (mL)^e	𝐹 (h)^f
1	60	2.77	17.12	3.61	29.7	3
2	70	1.39	5.71	2.71	39.6	4
3	80	0.93	3.42	1.80	49.5	5
4	90	0.69	2.45	1.20	59.4	6
5	100	0.56	1.90	0.90	69.3	7

^a𝐴: reaction temperature.
^b𝐵: mass ratio of residue to formaldehyde.
^c𝐶: mass ratio of residue to catalyst.
^d𝐷: mass ratio of residue to sulfonating agent.
^e𝐸: amount of water.
^f𝐹: reaction time.